1 /***************************************************************************
5 copyright : (C) 2003-2017 by Intra2net AG and the libftdi developers
6 email : opensource@intra2net.com
7 ***************************************************************************/
9 /***************************************************************************
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU Lesser General Public License *
13 * version 2.1 as published by the Free Software Foundation; *
15 ***************************************************************************/
18 \mainpage libftdi API documentation
20 Library to talk to FTDI chips. You find the latest versions of libftdi at
21 https://www.intra2net.com/en/developer/libftdi/
23 The library is easy to use. Have a look at this short example:
26 More examples can be found in the "examples" directory.
28 /** \addtogroup libftdi */
39 #include "ftdi_version_i.h"
41 #define ftdi_error_return(code, str) do { \
43 ftdi->error_str = str; \
45 fprintf(stderr, str); \
49 #define ftdi_error_return_free_device_list(code, str, devs) do { \
50 libusb_free_device_list(devs,1); \
51 ftdi->error_str = str; \
57 Internal function to close usb device pointer.
58 Sets ftdi->usb_dev to NULL.
61 \param ftdi pointer to ftdi_context
65 static void ftdi_usb_close_internal (struct ftdi_context *ftdi)
67 if (ftdi && ftdi->usb_dev)
69 libusb_close (ftdi->usb_dev);
72 ftdi->eeprom->initialized_for_connected_device = 0;
77 Initializes a ftdi_context.
79 \param ftdi pointer to ftdi_context
82 \retval -1: couldn't allocate read buffer
83 \retval -2: couldn't allocate struct buffer
84 \retval -3: libusb_init() failed
86 \remark This should be called before all functions
88 int ftdi_init(struct ftdi_context *ftdi)
90 struct ftdi_eeprom* eeprom;
93 ftdi->usb_read_timeout = 5000;
94 ftdi->usb_write_timeout = 5000;
96 ftdi->type = TYPE_BM; /* chip type */
98 ftdi->bitbang_enabled = 0; /* 0: normal mode 1: any of the bitbang modes enabled */
100 ftdi->readbuffer = NULL;
101 ftdi->readbuffer_offset = 0;
102 ftdi->readbuffer_remaining = 0;
103 ftdi->writebuffer_chunksize = 4096;
104 ftdi->max_packet_size = 0;
105 ftdi->error_str = NULL;
106 ftdi->module_detach_mode = AUTO_DETACH_SIO_MODULE;
108 if (libusb_init(&ftdi->usb_ctx) < 0)
109 ftdi_error_return(-3, "libusb_init() failed");
111 ftdi_set_interface(ftdi, INTERFACE_ANY);
112 ftdi->bitbang_mode = 1; /* when bitbang is enabled this holds the number of the mode */
114 eeprom = (struct ftdi_eeprom *)malloc(sizeof(struct ftdi_eeprom));
116 ftdi_error_return(-2, "Can't malloc struct ftdi_eeprom");
117 memset(eeprom, 0, sizeof(struct ftdi_eeprom));
118 ftdi->eeprom = eeprom;
120 /* All fine. Now allocate the readbuffer */
121 return ftdi_read_data_set_chunksize(ftdi, 4096);
125 Allocate and initialize a new ftdi_context
127 \return a pointer to a new ftdi_context, or NULL on failure
129 struct ftdi_context *ftdi_new(void)
131 struct ftdi_context * ftdi = (struct ftdi_context *)malloc(sizeof(struct ftdi_context));
138 if (ftdi_init(ftdi) != 0)
148 Open selected channels on a chip, otherwise use first channel.
150 \param ftdi pointer to ftdi_context
151 \param interface Interface to use for FT2232C/2232H/4232H chips.
154 \retval -1: unknown interface
155 \retval -2: USB device unavailable
156 \retval -3: Device already open, interface can't be set in that state
158 int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface)
161 ftdi_error_return(-2, "USB device unavailable");
163 if (ftdi->usb_dev != NULL)
165 int check_interface = interface;
166 if (check_interface == INTERFACE_ANY)
167 check_interface = INTERFACE_A;
169 if (ftdi->index != check_interface)
170 ftdi_error_return(-3, "Interface can not be changed on an already open device");
178 ftdi->index = INTERFACE_A;
184 ftdi->index = INTERFACE_B;
190 ftdi->index = INTERFACE_C;
196 ftdi->index = INTERFACE_D;
201 ftdi_error_return(-1, "Unknown interface");
207 Deinitializes a ftdi_context.
209 \param ftdi pointer to ftdi_context
211 void ftdi_deinit(struct ftdi_context *ftdi)
216 ftdi_usb_close_internal (ftdi);
218 if (ftdi->readbuffer != NULL)
220 free(ftdi->readbuffer);
221 ftdi->readbuffer = NULL;
224 if (ftdi->eeprom != NULL)
226 if (ftdi->eeprom->manufacturer != 0)
228 free(ftdi->eeprom->manufacturer);
229 ftdi->eeprom->manufacturer = 0;
231 if (ftdi->eeprom->product != 0)
233 free(ftdi->eeprom->product);
234 ftdi->eeprom->product = 0;
236 if (ftdi->eeprom->serial != 0)
238 free(ftdi->eeprom->serial);
239 ftdi->eeprom->serial = 0;
247 libusb_exit(ftdi->usb_ctx);
248 ftdi->usb_ctx = NULL;
253 Deinitialize and free an ftdi_context.
255 \param ftdi pointer to ftdi_context
257 void ftdi_free(struct ftdi_context *ftdi)
264 Use an already open libusb device.
266 \param ftdi pointer to ftdi_context
267 \param usb libusb libusb_device_handle to use
269 void ftdi_set_usbdev (struct ftdi_context *ftdi, libusb_device_handle *usb)
278 * @brief Get libftdi library version
280 * @return ftdi_version_info Library version information
282 struct ftdi_version_info ftdi_get_library_version(void)
284 struct ftdi_version_info ver;
286 ver.major = FTDI_MAJOR_VERSION;
287 ver.minor = FTDI_MINOR_VERSION;
288 ver.micro = FTDI_MICRO_VERSION;
289 ver.version_str = FTDI_VERSION_STRING;
290 ver.snapshot_str = FTDI_SNAPSHOT_VERSION;
296 Finds all ftdi devices with given VID:PID on the usb bus. Creates a new
297 ftdi_device_list which needs to be deallocated by ftdi_list_free() after
298 use. With VID:PID 0:0, search for the default devices
299 (0x403:0x6001, 0x403:0x6010, 0x403:0x6011, 0x403:0x6014, 0x403:0x6015)
301 \param ftdi pointer to ftdi_context
302 \param devlist Pointer where to store list of found devices
303 \param vendor Vendor ID to search for
304 \param product Product ID to search for
306 \retval >0: number of devices found
307 \retval -3: out of memory
308 \retval -5: libusb_get_device_list() failed
309 \retval -6: libusb_get_device_descriptor() failed
311 int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product)
313 struct ftdi_device_list **curdev;
315 libusb_device **devs;
319 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
320 ftdi_error_return(-5, "libusb_get_device_list() failed");
325 while ((dev = devs[i++]) != NULL)
327 struct libusb_device_descriptor desc;
329 if (libusb_get_device_descriptor(dev, &desc) < 0)
330 ftdi_error_return_free_device_list(-6, "libusb_get_device_descriptor() failed", devs);
332 if (((vendor || product) &&
333 desc.idVendor == vendor && desc.idProduct == product) ||
334 (!(vendor || product) &&
335 (desc.idVendor == 0x403) && (desc.idProduct == 0x6001 || desc.idProduct == 0x6010
336 || desc.idProduct == 0x6011 || desc.idProduct == 0x6014
337 || desc.idProduct == 0x6015)))
339 *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
341 ftdi_error_return_free_device_list(-3, "out of memory", devs);
343 (*curdev)->next = NULL;
344 (*curdev)->dev = dev;
345 libusb_ref_device(dev);
346 curdev = &(*curdev)->next;
350 libusb_free_device_list(devs,1);
355 Frees a usb device list.
357 \param devlist USB device list created by ftdi_usb_find_all()
359 void ftdi_list_free(struct ftdi_device_list **devlist)
361 struct ftdi_device_list *curdev, *next;
363 for (curdev = *devlist; curdev != NULL;)
366 libusb_unref_device(curdev->dev);
375 Frees a usb device list.
377 \param devlist USB device list created by ftdi_usb_find_all()
379 void ftdi_list_free2(struct ftdi_device_list *devlist)
381 ftdi_list_free(&devlist);
385 Return device ID strings from the usb device.
387 The parameters manufacturer, description and serial may be NULL
388 or pointer to buffers to store the fetched strings.
390 \note Use this function only in combination with ftdi_usb_find_all()
391 as it closes the internal "usb_dev" after use.
393 \param ftdi pointer to ftdi_context
394 \param dev libusb usb_dev to use
395 \param manufacturer Store manufacturer string here if not NULL
396 \param mnf_len Buffer size of manufacturer string
397 \param description Store product description string here if not NULL
398 \param desc_len Buffer size of product description string
399 \param serial Store serial string here if not NULL
400 \param serial_len Buffer size of serial string
403 \retval -1: wrong arguments
404 \retval -4: unable to open device
405 \retval -7: get product manufacturer failed
406 \retval -8: get product description failed
407 \retval -9: get serial number failed
408 \retval -11: libusb_get_device_descriptor() failed
410 int ftdi_usb_get_strings(struct ftdi_context *ftdi,
411 struct libusb_device *dev,
412 char *manufacturer, int mnf_len,
413 char *description, int desc_len,
414 char *serial, int serial_len)
418 if ((ftdi==NULL) || (dev==NULL))
421 if (ftdi->usb_dev == NULL && libusb_open(dev, &ftdi->usb_dev) < 0)
422 ftdi_error_return(-4, "libusb_open() failed");
424 // ftdi->usb_dev will not be NULL when entering ftdi_usb_get_strings2(), so
425 // it won't be closed either. This allows us to close it whether we actually
426 // called libusb_open() up above or not. This matches the expected behavior
427 // (and note) for ftdi_usb_get_strings().
428 ret = ftdi_usb_get_strings2(ftdi, dev,
429 manufacturer, mnf_len,
430 description, desc_len,
433 // only close it if it was successful, as all other return codes close
434 // before returning already.
436 ftdi_usb_close_internal(ftdi);
442 Return device ID strings from the usb device.
444 The parameters manufacturer, description and serial may be NULL
445 or pointer to buffers to store the fetched strings.
447 \note The old function ftdi_usb_get_strings() always closes the device.
448 This version only closes the device if it was opened by it.
450 \param ftdi pointer to ftdi_context
451 \param dev libusb usb_dev to use
452 \param manufacturer Store manufacturer string here if not NULL
453 \param mnf_len Buffer size of manufacturer string
454 \param description Store product description string here if not NULL
455 \param desc_len Buffer size of product description string
456 \param serial Store serial string here if not NULL
457 \param serial_len Buffer size of serial string
460 \retval -1: wrong arguments
461 \retval -4: unable to open device
462 \retval -7: get product manufacturer failed
463 \retval -8: get product description failed
464 \retval -9: get serial number failed
465 \retval -11: libusb_get_device_descriptor() failed
467 int ftdi_usb_get_strings2(struct ftdi_context *ftdi, struct libusb_device *dev,
468 char *manufacturer, int mnf_len,
469 char *description, int desc_len,
470 char *serial, int serial_len)
472 struct libusb_device_descriptor desc;
475 if ((ftdi==NULL) || (dev==NULL))
478 need_open = (ftdi->usb_dev == NULL);
479 if (need_open && libusb_open(dev, &ftdi->usb_dev) < 0)
480 ftdi_error_return(-4, "libusb_open() failed");
482 if (libusb_get_device_descriptor(dev, &desc) < 0)
483 ftdi_error_return(-11, "libusb_get_device_descriptor() failed");
485 if (manufacturer != NULL)
487 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iManufacturer, (unsigned char *)manufacturer, mnf_len) < 0)
489 ftdi_usb_close_internal (ftdi);
490 ftdi_error_return(-7, "libusb_get_string_descriptor_ascii() failed");
494 if (description != NULL)
496 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)description, desc_len) < 0)
498 ftdi_usb_close_internal (ftdi);
499 ftdi_error_return(-8, "libusb_get_string_descriptor_ascii() failed");
505 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)serial, serial_len) < 0)
507 ftdi_usb_close_internal (ftdi);
508 ftdi_error_return(-9, "libusb_get_string_descriptor_ascii() failed");
513 ftdi_usb_close_internal (ftdi);
519 * Internal function to determine the maximum packet size.
520 * \param ftdi pointer to ftdi_context
521 * \param dev libusb usb_dev to use
522 * \retval Maximum packet size for this device
524 static unsigned int _ftdi_determine_max_packet_size(struct ftdi_context *ftdi, libusb_device *dev)
526 struct libusb_device_descriptor desc;
527 struct libusb_config_descriptor *config0;
528 unsigned int packet_size;
531 if (ftdi == NULL || dev == NULL)
534 // Determine maximum packet size. Init with default value.
535 // New hi-speed devices from FTDI use a packet size of 512 bytes
536 // but could be connected to a normal speed USB hub -> 64 bytes packet size.
537 if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H)
542 if (libusb_get_device_descriptor(dev, &desc) < 0)
545 if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
548 if (desc.bNumConfigurations > 0)
550 if (ftdi->interface < config0->bNumInterfaces)
552 struct libusb_interface interface = config0->interface[ftdi->interface];
553 if (interface.num_altsetting > 0)
555 struct libusb_interface_descriptor descriptor = interface.altsetting[0];
556 if (descriptor.bNumEndpoints > 0)
558 packet_size = descriptor.endpoint[0].wMaxPacketSize;
564 libusb_free_config_descriptor (config0);
569 Opens a ftdi device given by an usb_device.
571 \param ftdi pointer to ftdi_context
572 \param dev libusb usb_dev to use
575 \retval -3: unable to config device
576 \retval -4: unable to open device
577 \retval -5: unable to claim device
578 \retval -6: reset failed
579 \retval -7: set baudrate failed
580 \retval -8: ftdi context invalid
581 \retval -9: libusb_get_device_descriptor() failed
582 \retval -10: libusb_get_config_descriptor() failed
583 \retval -11: libusb_detach_kernel_driver() failed
584 \retval -12: libusb_get_configuration() failed
586 int ftdi_usb_open_dev(struct ftdi_context *ftdi, libusb_device *dev)
588 struct libusb_device_descriptor desc;
589 struct libusb_config_descriptor *config0;
590 int cfg, cfg0, detach_errno = 0;
593 ftdi_error_return(-8, "ftdi context invalid");
595 if (libusb_open(dev, &ftdi->usb_dev) < 0)
596 ftdi_error_return(-4, "libusb_open() failed");
598 if (libusb_get_device_descriptor(dev, &desc) < 0)
599 ftdi_error_return(-9, "libusb_get_device_descriptor() failed");
601 if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
602 ftdi_error_return(-10, "libusb_get_config_descriptor() failed");
603 cfg0 = config0->bConfigurationValue;
604 libusb_free_config_descriptor (config0);
606 // Try to detach ftdi_sio kernel module.
608 // The return code is kept in a separate variable and only parsed
609 // if usb_set_configuration() or usb_claim_interface() fails as the
610 // detach operation might be denied and everything still works fine.
611 // Likely scenario is a static ftdi_sio kernel module.
612 if (ftdi->module_detach_mode == AUTO_DETACH_SIO_MODULE)
614 if (libusb_detach_kernel_driver(ftdi->usb_dev, ftdi->interface) !=0)
615 detach_errno = errno;
618 if (libusb_get_configuration (ftdi->usb_dev, &cfg) < 0)
619 ftdi_error_return(-12, "libusb_get_configuration () failed");
620 // set configuration (needed especially for windows)
621 // tolerate EBUSY: one device with one configuration, but two interfaces
622 // and libftdi sessions to both interfaces (e.g. FT2232)
623 if (desc.bNumConfigurations > 0 && cfg != cfg0)
625 if (libusb_set_configuration(ftdi->usb_dev, cfg0) < 0)
627 ftdi_usb_close_internal (ftdi);
628 if (detach_errno == EPERM)
630 ftdi_error_return(-8, "inappropriate permissions on device!");
634 ftdi_error_return(-3, "unable to set usb configuration. Make sure the default FTDI driver is not in use");
639 if (libusb_claim_interface(ftdi->usb_dev, ftdi->interface) < 0)
641 ftdi_usb_close_internal (ftdi);
642 if (detach_errno == EPERM)
644 ftdi_error_return(-8, "inappropriate permissions on device!");
648 ftdi_error_return(-5, "unable to claim usb device. Make sure the default FTDI driver is not in use");
652 if (ftdi_usb_reset (ftdi) != 0)
654 ftdi_usb_close_internal (ftdi);
655 ftdi_error_return(-6, "ftdi_usb_reset failed");
658 // Try to guess chip type
659 // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0
660 if (desc.bcdDevice == 0x400 || (desc.bcdDevice == 0x200
661 && desc.iSerialNumber == 0))
662 ftdi->type = TYPE_BM;
663 else if (desc.bcdDevice == 0x200)
664 ftdi->type = TYPE_AM;
665 else if (desc.bcdDevice == 0x500)
666 ftdi->type = TYPE_2232C;
667 else if (desc.bcdDevice == 0x600)
669 else if (desc.bcdDevice == 0x700)
670 ftdi->type = TYPE_2232H;
671 else if (desc.bcdDevice == 0x800)
672 ftdi->type = TYPE_4232H;
673 else if (desc.bcdDevice == 0x900)
674 ftdi->type = TYPE_232H;
675 else if (desc.bcdDevice == 0x1000)
676 ftdi->type = TYPE_230X;
678 // Determine maximum packet size
679 ftdi->max_packet_size = _ftdi_determine_max_packet_size(ftdi, dev);
681 if (ftdi_set_baudrate (ftdi, 9600) != 0)
683 ftdi_usb_close_internal (ftdi);
684 ftdi_error_return(-7, "set baudrate failed");
687 ftdi_error_return(0, "all fine");
691 Opens the first device with a given vendor and product ids.
693 \param ftdi pointer to ftdi_context
694 \param vendor Vendor ID
695 \param product Product ID
697 \retval same as ftdi_usb_open_desc()
699 int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
701 return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
705 Opens the first device with a given, vendor id, product id,
706 description and serial.
708 \param ftdi pointer to ftdi_context
709 \param vendor Vendor ID
710 \param product Product ID
711 \param description Description to search for. Use NULL if not needed.
712 \param serial Serial to search for. Use NULL if not needed.
715 \retval -3: usb device not found
716 \retval -4: unable to open device
717 \retval -5: unable to claim device
718 \retval -6: reset failed
719 \retval -7: set baudrate failed
720 \retval -8: get product description failed
721 \retval -9: get serial number failed
722 \retval -12: libusb_get_device_list() failed
723 \retval -13: libusb_get_device_descriptor() failed
725 int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
726 const char* description, const char* serial)
728 return ftdi_usb_open_desc_index(ftdi,vendor,product,description,serial,0);
732 Opens the index-th device with a given, vendor id, product id,
733 description and serial.
735 \param ftdi pointer to ftdi_context
736 \param vendor Vendor ID
737 \param product Product ID
738 \param description Description to search for. Use NULL if not needed.
739 \param serial Serial to search for. Use NULL if not needed.
740 \param index Number of matching device to open if there are more than one, starts with 0.
743 \retval -1: usb_find_busses() failed
744 \retval -2: usb_find_devices() failed
745 \retval -3: usb device not found
746 \retval -4: unable to open device
747 \retval -5: unable to claim device
748 \retval -6: reset failed
749 \retval -7: set baudrate failed
750 \retval -8: get product description failed
751 \retval -9: get serial number failed
752 \retval -10: unable to close device
753 \retval -11: ftdi context invalid
754 \retval -12: libusb_get_device_list() failed
756 int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int vendor, int product,
757 const char* description, const char* serial, unsigned int index)
760 libusb_device **devs;
765 ftdi_error_return(-11, "ftdi context invalid");
767 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
768 ftdi_error_return(-12, "libusb_get_device_list() failed");
770 while ((dev = devs[i++]) != NULL)
772 struct libusb_device_descriptor desc;
775 if (libusb_get_device_descriptor(dev, &desc) < 0)
776 ftdi_error_return_free_device_list(-13, "libusb_get_device_descriptor() failed", devs);
778 if (desc.idVendor == vendor && desc.idProduct == product)
780 if (libusb_open(dev, &ftdi->usb_dev) < 0)
781 ftdi_error_return_free_device_list(-4, "usb_open() failed", devs);
783 if (description != NULL)
785 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)string, sizeof(string)) < 0)
787 ftdi_usb_close_internal (ftdi);
788 ftdi_error_return_free_device_list(-8, "unable to fetch product description", devs);
790 if (strncmp(string, description, sizeof(string)) != 0)
792 ftdi_usb_close_internal (ftdi);
798 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)string, sizeof(string)) < 0)
800 ftdi_usb_close_internal (ftdi);
801 ftdi_error_return_free_device_list(-9, "unable to fetch serial number", devs);
803 if (strncmp(string, serial, sizeof(string)) != 0)
805 ftdi_usb_close_internal (ftdi);
810 ftdi_usb_close_internal (ftdi);
818 res = ftdi_usb_open_dev(ftdi, dev);
819 libusb_free_device_list(devs,1);
825 ftdi_error_return_free_device_list(-3, "device not found", devs);
829 Opens the device at a given USB bus and device address.
831 \param ftdi pointer to ftdi_context
832 \param bus Bus number
833 \param addr Device address
836 \retval -1: usb_find_busses() failed
837 \retval -2: usb_find_devices() failed
838 \retval -3: usb device not found
839 \retval -4: unable to open device
840 \retval -5: unable to claim device
841 \retval -6: reset failed
842 \retval -7: set baudrate failed
843 \retval -8: get product description failed
844 \retval -9: get serial number failed
845 \retval -10: unable to close device
846 \retval -11: ftdi context invalid
847 \retval -12: libusb_get_device_list() failed
849 int ftdi_usb_open_bus_addr(struct ftdi_context *ftdi, uint8_t bus, uint8_t addr)
852 libusb_device **devs;
856 ftdi_error_return(-11, "ftdi context invalid");
858 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
859 ftdi_error_return(-12, "libusb_get_device_list() failed");
861 while ((dev = devs[i++]) != NULL)
863 if (libusb_get_bus_number(dev) == bus && libusb_get_device_address(dev) == addr)
866 res = ftdi_usb_open_dev(ftdi, dev);
867 libusb_free_device_list(devs,1);
873 ftdi_error_return_free_device_list(-3, "device not found", devs);
877 Opens the ftdi-device described by a description-string.
878 Intended to be used for parsing a device-description given as commandline argument.
880 \param ftdi pointer to ftdi_context
881 \param description NULL-terminated description-string, using this format:
882 \li <tt>d:\<devicenode></tt> path of bus and device-node (e.g. "003/001") within usb device tree (usually at /proc/bus/usb/)
883 \li <tt>i:\<vendor>:\<product></tt> first device with given vendor and product id, ids can be decimal, octal (preceded by "0") or hex (preceded by "0x")
884 \li <tt>i:\<vendor>:\<product>:\<index></tt> as above with index being the number of the device (starting with 0) if there are more than one
885 \li <tt>s:\<vendor>:\<product>:\<serial></tt> first device with given vendor id, product id and serial string
887 \note The description format may be extended in later versions.
890 \retval -2: libusb_get_device_list() failed
891 \retval -3: usb device not found
892 \retval -4: unable to open device
893 \retval -5: unable to claim device
894 \retval -6: reset failed
895 \retval -7: set baudrate failed
896 \retval -8: get product description failed
897 \retval -9: get serial number failed
898 \retval -10: unable to close device
899 \retval -11: illegal description format
900 \retval -12: ftdi context invalid
902 int ftdi_usb_open_string(struct ftdi_context *ftdi, const char* description)
905 ftdi_error_return(-12, "ftdi context invalid");
907 if (description[0] == 0 || description[1] != ':')
908 ftdi_error_return(-11, "illegal description format");
910 if (description[0] == 'd')
913 libusb_device **devs;
914 unsigned int bus_number, device_address;
917 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
918 ftdi_error_return(-2, "libusb_get_device_list() failed");
920 /* XXX: This doesn't handle symlinks/odd paths/etc... */
921 if (sscanf (description + 2, "%u/%u", &bus_number, &device_address) != 2)
922 ftdi_error_return_free_device_list(-11, "illegal description format", devs);
924 while ((dev = devs[i++]) != NULL)
927 if (bus_number == libusb_get_bus_number (dev)
928 && device_address == libusb_get_device_address (dev))
930 ret = ftdi_usb_open_dev(ftdi, dev);
931 libusb_free_device_list(devs,1);
937 ftdi_error_return_free_device_list(-3, "device not found", devs);
939 else if (description[0] == 'i' || description[0] == 's')
942 unsigned int product;
943 unsigned int index=0;
944 const char *serial=NULL;
945 const char *startp, *endp;
948 startp=description+2;
949 vendor=strtoul((char*)startp,(char**)&endp,0);
950 if (*endp != ':' || endp == startp || errno != 0)
951 ftdi_error_return(-11, "illegal description format");
954 product=strtoul((char*)startp,(char**)&endp,0);
955 if (endp == startp || errno != 0)
956 ftdi_error_return(-11, "illegal description format");
958 if (description[0] == 'i' && *endp != 0)
960 /* optional index field in i-mode */
962 ftdi_error_return(-11, "illegal description format");
965 index=strtoul((char*)startp,(char**)&endp,0);
966 if (*endp != 0 || endp == startp || errno != 0)
967 ftdi_error_return(-11, "illegal description format");
969 if (description[0] == 's')
972 ftdi_error_return(-11, "illegal description format");
974 /* rest of the description is the serial */
978 return ftdi_usb_open_desc_index(ftdi, vendor, product, NULL, serial, index);
982 ftdi_error_return(-11, "illegal description format");
987 Resets the ftdi device.
989 \param ftdi pointer to ftdi_context
992 \retval -1: FTDI reset failed
993 \retval -2: USB device unavailable
995 int ftdi_usb_reset(struct ftdi_context *ftdi)
997 if (ftdi == NULL || ftdi->usb_dev == NULL)
998 ftdi_error_return(-2, "USB device unavailable");
1000 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1001 SIO_RESET_REQUEST, SIO_RESET_SIO,
1002 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1003 ftdi_error_return(-1,"FTDI reset failed");
1005 // Invalidate data in the readbuffer
1006 ftdi->readbuffer_offset = 0;
1007 ftdi->readbuffer_remaining = 0;
1013 Clears the read buffer on the chip and the internal read buffer.
1015 \param ftdi pointer to ftdi_context
1018 \retval -1: read buffer purge failed
1019 \retval -2: USB device unavailable
1021 int ftdi_usb_purge_rx_buffer(struct ftdi_context *ftdi)
1023 if (ftdi == NULL || ftdi->usb_dev == NULL)
1024 ftdi_error_return(-2, "USB device unavailable");
1026 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1027 SIO_RESET_REQUEST, SIO_RESET_PURGE_RX,
1028 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1029 ftdi_error_return(-1, "FTDI purge of RX buffer failed");
1031 // Invalidate data in the readbuffer
1032 ftdi->readbuffer_offset = 0;
1033 ftdi->readbuffer_remaining = 0;
1039 Clears the write buffer on the chip.
1041 \param ftdi pointer to ftdi_context
1044 \retval -1: write buffer purge failed
1045 \retval -2: USB device unavailable
1047 int ftdi_usb_purge_tx_buffer(struct ftdi_context *ftdi)
1049 if (ftdi == NULL || ftdi->usb_dev == NULL)
1050 ftdi_error_return(-2, "USB device unavailable");
1052 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1053 SIO_RESET_REQUEST, SIO_RESET_PURGE_TX,
1054 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1055 ftdi_error_return(-1, "FTDI purge of TX buffer failed");
1061 Clears the buffers on the chip and the internal read buffer.
1063 \param ftdi pointer to ftdi_context
1066 \retval -1: read buffer purge failed
1067 \retval -2: write buffer purge failed
1068 \retval -3: USB device unavailable
1070 int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
1074 if (ftdi == NULL || ftdi->usb_dev == NULL)
1075 ftdi_error_return(-3, "USB device unavailable");
1077 result = ftdi_usb_purge_rx_buffer(ftdi);
1081 result = ftdi_usb_purge_tx_buffer(ftdi);
1091 Closes the ftdi device. Call ftdi_deinit() if you're cleaning up.
1093 \param ftdi pointer to ftdi_context
1096 \retval -1: usb_release failed
1097 \retval -3: ftdi context invalid
1099 int ftdi_usb_close(struct ftdi_context *ftdi)
1104 ftdi_error_return(-3, "ftdi context invalid");
1106 if (ftdi->usb_dev != NULL)
1107 if (libusb_release_interface(ftdi->usb_dev, ftdi->interface) < 0)
1110 ftdi_usb_close_internal (ftdi);
1115 /* ftdi_to_clkbits_AM For the AM device, convert a requested baudrate
1116 to encoded divisor and the achievable baudrate
1117 Function is only used internally
1124 From /2, 0.125/ 0.25 and 0.5 steps may be taken
1125 The fractional part has frac_code encoding
1127 static int ftdi_to_clkbits_AM(int baudrate, unsigned long *encoded_divisor)
1130 static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
1131 static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
1132 static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
1133 int divisor, best_divisor, best_baud, best_baud_diff;
1135 divisor = 24000000 / baudrate;
1137 // Round down to supported fraction (AM only)
1138 divisor -= am_adjust_dn[divisor & 7];
1140 // Try this divisor and the one above it (because division rounds down)
1144 for (i = 0; i < 2; i++)
1146 int try_divisor = divisor + i;
1150 // Round up to supported divisor value
1151 if (try_divisor <= 8)
1153 // Round up to minimum supported divisor
1156 else if (divisor < 16)
1158 // AM doesn't support divisors 9 through 15 inclusive
1163 // Round up to supported fraction (AM only)
1164 try_divisor += am_adjust_up[try_divisor & 7];
1165 if (try_divisor > 0x1FFF8)
1167 // Round down to maximum supported divisor value (for AM)
1168 try_divisor = 0x1FFF8;
1171 // Get estimated baud rate (to nearest integer)
1172 baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor;
1173 // Get absolute difference from requested baud rate
1174 if (baud_estimate < baudrate)
1176 baud_diff = baudrate - baud_estimate;
1180 baud_diff = baud_estimate - baudrate;
1182 if (i == 0 || baud_diff < best_baud_diff)
1184 // Closest to requested baud rate so far
1185 best_divisor = try_divisor;
1186 best_baud = baud_estimate;
1187 best_baud_diff = baud_diff;
1190 // Spot on! No point trying
1195 // Encode the best divisor value
1196 *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
1197 // Deal with special cases for encoded value
1198 if (*encoded_divisor == 1)
1200 *encoded_divisor = 0; // 3000000 baud
1202 else if (*encoded_divisor == 0x4001)
1204 *encoded_divisor = 1; // 2000000 baud (BM only)
1209 /* ftdi_to_clkbits Convert a requested baudrate for a given system clock and predivisor
1210 to encoded divisor and the achievable baudrate
1211 Function is only used internally
1218 From /2, 0.125 steps may be taken.
1219 The fractional part has frac_code encoding
1221 value[13:0] of value is the divisor
1222 index[9] mean 12 MHz Base(120 MHz/10) rate versus 3 MHz (48 MHz/16) else
1224 H Type have all features above with
1225 {index[8],value[15:14]} is the encoded subdivisor
1227 FT232R, FT2232 and FT232BM have no option for 12 MHz and with
1228 {index[0],value[15:14]} is the encoded subdivisor
1230 AM Type chips have only four fractional subdivisors at value[15:14]
1231 for subdivisors 0, 0.5, 0.25, 0.125
1233 static int ftdi_to_clkbits(int baudrate, unsigned int clk, int clk_div, unsigned long *encoded_divisor)
1235 static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
1237 int divisor, best_divisor;
1238 if (baudrate >= clk/clk_div)
1240 *encoded_divisor = 0;
1241 best_baud = clk/clk_div;
1243 else if (baudrate >= clk/(clk_div + clk_div/2))
1245 *encoded_divisor = 1;
1246 best_baud = clk/(clk_div + clk_div/2);
1248 else if (baudrate >= clk/(2*clk_div))
1250 *encoded_divisor = 2;
1251 best_baud = clk/(2*clk_div);
1255 /* We divide by 16 to have 3 fractional bits and one bit for rounding */
1256 divisor = clk*16/clk_div / baudrate;
1257 if (divisor & 1) /* Decide if to round up or down*/
1258 best_divisor = divisor /2 +1;
1260 best_divisor = divisor/2;
1261 if(best_divisor > 0x20000)
1262 best_divisor = 0x1ffff;
1263 best_baud = clk*16/clk_div/best_divisor;
1264 if (best_baud & 1) /* Decide if to round up or down*/
1265 best_baud = best_baud /2 +1;
1267 best_baud = best_baud /2;
1268 *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 0x7] << 14);
1273 ftdi_convert_baudrate returns nearest supported baud rate to that requested.
1274 Function is only used internally
1277 static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
1278 unsigned short *value, unsigned short *index)
1281 unsigned long encoded_divisor;
1289 #define H_CLK 120000000
1290 #define C_CLK 48000000
1291 if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H) || (ftdi->type == TYPE_232H))
1293 if(baudrate*10 > H_CLK /0x3fff)
1295 /* On H Devices, use 12 000 000 Baudrate when possible
1296 We have a 14 bit divisor, a 1 bit divisor switch (10 or 16)
1297 three fractional bits and a 120 MHz clock
1298 Assume AN_120 "Sub-integer divisors between 0 and 2 are not allowed" holds for
1299 DIV/10 CLK too, so /1, /1.5 and /2 can be handled the same*/
1300 best_baud = ftdi_to_clkbits(baudrate, H_CLK, 10, &encoded_divisor);
1301 encoded_divisor |= 0x20000; /* switch on CLK/10*/
1304 best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1306 else if ((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C) || (ftdi->type == TYPE_R) || (ftdi->type == TYPE_230X))
1308 best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1312 best_baud = ftdi_to_clkbits_AM(baudrate, &encoded_divisor);
1314 // Split into "value" and "index" values
1315 *value = (unsigned short)(encoded_divisor & 0xFFFF);
1316 if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H)
1318 *index = (unsigned short)(encoded_divisor >> 8);
1320 *index |= ftdi->index;
1323 *index = (unsigned short)(encoded_divisor >> 16);
1325 // Return the nearest baud rate
1330 * @brief Wrapper function to export ftdi_convert_baudrate() to the unit test
1331 * Do not use, it's only for the unit test framework
1333 int convert_baudrate_UT_export(int baudrate, struct ftdi_context *ftdi,
1334 unsigned short *value, unsigned short *index)
1336 return ftdi_convert_baudrate(baudrate, ftdi, value, index);
1340 Sets the chip baud rate
1342 \param ftdi pointer to ftdi_context
1343 \param baudrate baud rate to set
1346 \retval -1: invalid baudrate
1347 \retval -2: setting baudrate failed
1348 \retval -3: USB device unavailable
1350 int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
1352 unsigned short value, index;
1353 int actual_baudrate;
1355 if (ftdi == NULL || ftdi->usb_dev == NULL)
1356 ftdi_error_return(-3, "USB device unavailable");
1358 if (ftdi->bitbang_enabled)
1360 baudrate = baudrate*4;
1363 actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index);
1364 if (actual_baudrate <= 0)
1365 ftdi_error_return (-1, "Silly baudrate <= 0.");
1367 // Check within tolerance (about 5%)
1368 if ((actual_baudrate * 2 < baudrate /* Catch overflows */ )
1369 || ((actual_baudrate < baudrate)
1370 ? (actual_baudrate * 21 < baudrate * 20)
1371 : (baudrate * 21 < actual_baudrate * 20)))
1372 ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4");
1374 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1375 SIO_SET_BAUDRATE_REQUEST, value,
1376 index, NULL, 0, ftdi->usb_write_timeout) < 0)
1377 ftdi_error_return (-2, "Setting new baudrate failed");
1379 ftdi->baudrate = baudrate;
1384 Set (RS232) line characteristics.
1385 The break type can only be set via ftdi_set_line_property2()
1386 and defaults to "off".
1388 \param ftdi pointer to ftdi_context
1389 \param bits Number of bits
1390 \param sbit Number of stop bits
1391 \param parity Parity mode
1394 \retval -1: Setting line property failed
1396 int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
1397 enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity)
1399 return ftdi_set_line_property2(ftdi, bits, sbit, parity, BREAK_OFF);
1403 Set (RS232) line characteristics
1405 \param ftdi pointer to ftdi_context
1406 \param bits Number of bits
1407 \param sbit Number of stop bits
1408 \param parity Parity mode
1409 \param break_type Break type
1412 \retval -1: Setting line property failed
1413 \retval -2: USB device unavailable
1415 int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
1416 enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity,
1417 enum ftdi_break_type break_type)
1419 unsigned short value = bits;
1421 if (ftdi == NULL || ftdi->usb_dev == NULL)
1422 ftdi_error_return(-2, "USB device unavailable");
1427 value |= (0x00 << 8);
1430 value |= (0x01 << 8);
1433 value |= (0x02 << 8);
1436 value |= (0x03 << 8);
1439 value |= (0x04 << 8);
1446 value |= (0x00 << 11);
1449 value |= (0x01 << 11);
1452 value |= (0x02 << 11);
1459 value |= (0x00 << 14);
1462 value |= (0x01 << 14);
1466 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1467 SIO_SET_DATA_REQUEST, value,
1468 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1469 ftdi_error_return (-1, "Setting new line property failed");
1475 Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip
1477 \param ftdi pointer to ftdi_context
1478 \param buf Buffer with the data
1479 \param size Size of the buffer
1481 \retval -666: USB device unavailable
1482 \retval <0: error code from usb_bulk_write()
1483 \retval >0: number of bytes written
1485 int ftdi_write_data(struct ftdi_context *ftdi, const unsigned char *buf, int size)
1490 if (ftdi == NULL || ftdi->usb_dev == NULL)
1491 ftdi_error_return(-666, "USB device unavailable");
1493 while (offset < size)
1495 int write_size = ftdi->writebuffer_chunksize;
1497 if (offset+write_size > size)
1498 write_size = size-offset;
1500 if (libusb_bulk_transfer(ftdi->usb_dev, ftdi->in_ep, (unsigned char *)buf+offset, write_size, &actual_length, ftdi->usb_write_timeout) < 0)
1501 ftdi_error_return(-1, "usb bulk write failed");
1503 offset += actual_length;
1509 static void LIBUSB_CALL ftdi_read_data_cb(struct libusb_transfer *transfer)
1511 struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1512 struct ftdi_context *ftdi = tc->ftdi;
1513 int packet_size, actual_length, num_of_chunks, chunk_remains, i, ret;
1515 packet_size = ftdi->max_packet_size;
1517 actual_length = transfer->actual_length;
1519 if (actual_length > 2)
1521 // skip FTDI status bytes.
1522 // Maybe stored in the future to enable modem use
1523 num_of_chunks = actual_length / packet_size;
1524 chunk_remains = actual_length % packet_size;
1525 //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
1527 ftdi->readbuffer_offset += 2;
1530 if (actual_length > packet_size - 2)
1532 for (i = 1; i < num_of_chunks; i++)
1533 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1534 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1536 if (chunk_remains > 2)
1538 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1539 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1541 actual_length -= 2*num_of_chunks;
1544 actual_length -= 2*(num_of_chunks-1)+chunk_remains;
1547 if (actual_length > 0)
1549 // data still fits in buf?
1550 if (tc->offset + actual_length <= tc->size)
1552 memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, actual_length);
1553 //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
1554 tc->offset += actual_length;
1556 ftdi->readbuffer_offset = 0;
1557 ftdi->readbuffer_remaining = 0;
1559 /* Did we read exactly the right amount of bytes? */
1560 if (tc->offset == tc->size)
1562 //printf("read_data exact rem %d offset %d\n",
1563 //ftdi->readbuffer_remaining, offset);
1570 // only copy part of the data or size <= readbuffer_chunksize
1571 int part_size = tc->size - tc->offset;
1572 memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, part_size);
1573 tc->offset += part_size;
1575 ftdi->readbuffer_offset += part_size;
1576 ftdi->readbuffer_remaining = actual_length - part_size;
1578 /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
1579 part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
1586 if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
1587 tc->completed = LIBUSB_TRANSFER_CANCELLED;
1590 ret = libusb_submit_transfer (transfer);
1597 static void LIBUSB_CALL ftdi_write_data_cb(struct libusb_transfer *transfer)
1599 struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1600 struct ftdi_context *ftdi = tc->ftdi;
1602 tc->offset += transfer->actual_length;
1604 if (tc->offset == tc->size)
1610 int write_size = ftdi->writebuffer_chunksize;
1613 if (tc->offset + write_size > tc->size)
1614 write_size = tc->size - tc->offset;
1616 transfer->length = write_size;
1617 transfer->buffer = tc->buf + tc->offset;
1619 if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
1620 tc->completed = LIBUSB_TRANSFER_CANCELLED;
1623 ret = libusb_submit_transfer (transfer);
1632 Writes data to the chip. Does not wait for completion of the transfer
1633 nor does it make sure that the transfer was successful.
1635 Use libusb 1.0 asynchronous API.
1637 \param ftdi pointer to ftdi_context
1638 \param buf Buffer with the data
1639 \param size Size of the buffer
1641 \retval NULL: Some error happens when submit transfer
1642 \retval !NULL: Pointer to a ftdi_transfer_control
1645 struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
1647 struct ftdi_transfer_control *tc;
1648 struct libusb_transfer *transfer;
1649 int write_size, ret;
1651 if (ftdi == NULL || ftdi->usb_dev == NULL)
1654 tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
1658 transfer = libusb_alloc_transfer(0);
1671 if (size < (int)ftdi->writebuffer_chunksize)
1674 write_size = ftdi->writebuffer_chunksize;
1676 libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->in_ep, buf,
1677 write_size, ftdi_write_data_cb, tc,
1678 ftdi->usb_write_timeout);
1679 transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1681 ret = libusb_submit_transfer(transfer);
1684 libusb_free_transfer(transfer);
1688 tc->transfer = transfer;
1694 Reads data from the chip. Does not wait for completion of the transfer
1695 nor does it make sure that the transfer was successful.
1697 Use libusb 1.0 asynchronous API.
1699 \param ftdi pointer to ftdi_context
1700 \param buf Buffer with the data
1701 \param size Size of the buffer
1703 \retval NULL: Some error happens when submit transfer
1704 \retval !NULL: Pointer to a ftdi_transfer_control
1707 struct ftdi_transfer_control *ftdi_read_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
1709 struct ftdi_transfer_control *tc;
1710 struct libusb_transfer *transfer;
1713 if (ftdi == NULL || ftdi->usb_dev == NULL)
1716 tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
1724 if (size <= (int)ftdi->readbuffer_remaining)
1726 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
1729 ftdi->readbuffer_remaining -= size;
1730 ftdi->readbuffer_offset += size;
1732 /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
1736 tc->transfer = NULL;
1741 if (ftdi->readbuffer_remaining != 0)
1743 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
1745 tc->offset = ftdi->readbuffer_remaining;
1750 transfer = libusb_alloc_transfer(0);
1757 ftdi->readbuffer_remaining = 0;
1758 ftdi->readbuffer_offset = 0;
1760 libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi_read_data_cb, tc, ftdi->usb_read_timeout);
1761 transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1763 ret = libusb_submit_transfer(transfer);
1766 libusb_free_transfer(transfer);
1770 tc->transfer = transfer;
1776 Wait for completion of the transfer.
1778 Use libusb 1.0 asynchronous API.
1780 \param tc pointer to ftdi_transfer_control
1782 \retval < 0: Some error happens
1783 \retval >= 0: Data size transferred
1786 int ftdi_transfer_data_done(struct ftdi_transfer_control *tc)
1789 struct timeval to = { 0, 0 };
1790 while (!tc->completed)
1792 ret = libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
1793 &to, &tc->completed);
1796 if (ret == LIBUSB_ERROR_INTERRUPTED)
1798 libusb_cancel_transfer(tc->transfer);
1799 while (!tc->completed)
1800 if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
1801 &to, &tc->completed) < 0)
1803 libusb_free_transfer(tc->transfer);
1811 * tc->transfer could be NULL if "(size <= ftdi->readbuffer_remaining)"
1812 * at ftdi_read_data_submit(). Therefore, we need to check it here.
1816 if (tc->transfer->status != LIBUSB_TRANSFER_COMPLETED)
1818 libusb_free_transfer(tc->transfer);
1825 Cancel transfer and wait for completion.
1827 Use libusb 1.0 asynchronous API.
1829 \param tc pointer to ftdi_transfer_control
1830 \param to pointer to timeout value or NULL for infinite
1833 void ftdi_transfer_data_cancel(struct ftdi_transfer_control *tc,
1834 struct timeval * to)
1836 struct timeval tv = { 0, 0 };
1838 if (!tc->completed && tc->transfer != NULL)
1843 libusb_cancel_transfer(tc->transfer);
1844 while (!tc->completed)
1846 if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx, to, &tc->completed) < 0)
1852 libusb_free_transfer(tc->transfer);
1858 Configure write buffer chunk size.
1861 \param ftdi pointer to ftdi_context
1862 \param chunksize Chunk size
1865 \retval -1: ftdi context invalid
1867 int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
1870 ftdi_error_return(-1, "ftdi context invalid");
1872 ftdi->writebuffer_chunksize = chunksize;
1877 Get write buffer chunk size.
1879 \param ftdi pointer to ftdi_context
1880 \param chunksize Pointer to store chunk size in
1883 \retval -1: ftdi context invalid
1885 int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
1888 ftdi_error_return(-1, "ftdi context invalid");
1890 *chunksize = ftdi->writebuffer_chunksize;
1895 Reads data in chunks (see ftdi_read_data_set_chunksize()) from the chip.
1897 Automatically strips the two modem status bytes transfered during every read.
1899 \param ftdi pointer to ftdi_context
1900 \param buf Buffer to store data in
1901 \param size Size of the buffer
1903 \retval -666: USB device unavailable
1904 \retval <0: error code from libusb_bulk_transfer()
1905 \retval 0: no data was available
1906 \retval >0: number of bytes read
1909 int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
1911 int offset = 0, ret, i, num_of_chunks, chunk_remains;
1912 int packet_size = ftdi->max_packet_size;
1913 int actual_length = 1;
1915 if (ftdi == NULL || ftdi->usb_dev == NULL)
1916 ftdi_error_return(-666, "USB device unavailable");
1918 // Packet size sanity check (avoid division by zero)
1919 if (packet_size == 0)
1920 ftdi_error_return(-1, "max_packet_size is bogus (zero)");
1922 // everything we want is still in the readbuffer?
1923 if (size <= (int)ftdi->readbuffer_remaining)
1925 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
1928 ftdi->readbuffer_remaining -= size;
1929 ftdi->readbuffer_offset += size;
1931 /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
1935 // something still in the readbuffer, but not enough to satisfy 'size'?
1936 if (ftdi->readbuffer_remaining != 0)
1938 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
1941 offset += ftdi->readbuffer_remaining;
1943 // do the actual USB read
1944 while (offset < size && actual_length > 0)
1946 ftdi->readbuffer_remaining = 0;
1947 ftdi->readbuffer_offset = 0;
1948 /* returns how much received */
1949 ret = libusb_bulk_transfer (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, &actual_length, ftdi->usb_read_timeout);
1951 ftdi_error_return(ret, "usb bulk read failed");
1953 if (actual_length > 2)
1955 // skip FTDI status bytes.
1956 // Maybe stored in the future to enable modem use
1957 num_of_chunks = actual_length / packet_size;
1958 chunk_remains = actual_length % packet_size;
1959 //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
1961 ftdi->readbuffer_offset += 2;
1964 if (actual_length > packet_size - 2)
1966 for (i = 1; i < num_of_chunks; i++)
1967 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1968 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1970 if (chunk_remains > 2)
1972 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1973 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1975 actual_length -= 2*num_of_chunks;
1978 actual_length -= 2*(num_of_chunks-1)+chunk_remains;
1981 else if (actual_length <= 2)
1983 // no more data to read?
1986 if (actual_length > 0)
1988 // data still fits in buf?
1989 if (offset+actual_length <= size)
1991 memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, actual_length);
1992 //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
1993 offset += actual_length;
1995 /* Did we read exactly the right amount of bytes? */
1997 //printf("read_data exact rem %d offset %d\n",
1998 //ftdi->readbuffer_remaining, offset);
2003 // only copy part of the data or size <= readbuffer_chunksize
2004 int part_size = size-offset;
2005 memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size);
2007 ftdi->readbuffer_offset += part_size;
2008 ftdi->readbuffer_remaining = actual_length-part_size;
2009 offset += part_size;
2011 /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
2012 part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
2023 Configure read buffer chunk size.
2026 Automatically reallocates the buffer.
2028 \param ftdi pointer to ftdi_context
2029 \param chunksize Chunk size
2032 \retval -1: ftdi context invalid
2034 int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
2036 unsigned char *new_buf;
2039 ftdi_error_return(-1, "ftdi context invalid");
2041 // Invalidate all remaining data
2042 ftdi->readbuffer_offset = 0;
2043 ftdi->readbuffer_remaining = 0;
2045 /* We can't set readbuffer_chunksize larger than MAX_BULK_BUFFER_LENGTH,
2046 which is defined in libusb-1.0. Otherwise, each USB read request will
2047 be divided into multiple URBs. This will cause issues on Linux kernel
2048 older than 2.6.32. */
2049 if (chunksize > 16384)
2053 if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL)
2054 ftdi_error_return(-1, "out of memory for readbuffer");
2056 ftdi->readbuffer = new_buf;
2057 ftdi->readbuffer_chunksize = chunksize;
2063 Get read buffer chunk size.
2065 \param ftdi pointer to ftdi_context
2066 \param chunksize Pointer to store chunk size in
2069 \retval -1: FTDI context invalid
2071 int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
2074 ftdi_error_return(-1, "FTDI context invalid");
2076 *chunksize = ftdi->readbuffer_chunksize;
2081 Enable/disable bitbang modes.
2083 \param ftdi pointer to ftdi_context
2084 \param bitmask Bitmask to configure lines.
2085 HIGH/ON value configures a line as output.
2086 \param mode Bitbang mode: use the values defined in \ref ftdi_mpsse_mode
2089 \retval -1: can't enable bitbang mode
2090 \retval -2: USB device unavailable
2092 int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
2094 unsigned short usb_val;
2096 if (ftdi == NULL || ftdi->usb_dev == NULL)
2097 ftdi_error_return(-2, "USB device unavailable");
2099 usb_val = bitmask; // low byte: bitmask
2100 usb_val |= (mode << 8);
2101 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2102 ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a BM/2232C type chip?");
2104 ftdi->bitbang_mode = mode;
2105 ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
2110 Disable bitbang mode.
2112 \param ftdi pointer to ftdi_context
2115 \retval -1: can't disable bitbang mode
2116 \retval -2: USB device unavailable
2118 int ftdi_disable_bitbang(struct ftdi_context *ftdi)
2120 if (ftdi == NULL || ftdi->usb_dev == NULL)
2121 ftdi_error_return(-2, "USB device unavailable");
2123 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2124 ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?");
2126 ftdi->bitbang_enabled = 0;
2132 Directly read pin state, circumventing the read buffer. Useful for bitbang mode.
2134 \param ftdi pointer to ftdi_context
2135 \param pins Pointer to store pins into
2138 \retval -1: read pins failed
2139 \retval -2: USB device unavailable
2141 int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
2143 if (ftdi == NULL || ftdi->usb_dev == NULL)
2144 ftdi_error_return(-2, "USB device unavailable");
2146 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_PINS_REQUEST, 0, ftdi->index, (unsigned char *)pins, 1, ftdi->usb_read_timeout) != 1)
2147 ftdi_error_return(-1, "read pins failed");
2155 The FTDI chip keeps data in the internal buffer for a specific
2156 amount of time if the buffer is not full yet to decrease
2157 load on the usb bus.
2159 \param ftdi pointer to ftdi_context
2160 \param latency Value between 1 and 255
2163 \retval -1: latency out of range
2164 \retval -2: unable to set latency timer
2165 \retval -3: USB device unavailable
2167 int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
2169 unsigned short usb_val;
2172 ftdi_error_return(-1, "latency out of range. Only valid for 1-255");
2174 if (ftdi == NULL || ftdi->usb_dev == NULL)
2175 ftdi_error_return(-3, "USB device unavailable");
2178 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_LATENCY_TIMER_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2179 ftdi_error_return(-2, "unable to set latency timer");
2187 \param ftdi pointer to ftdi_context
2188 \param latency Pointer to store latency value in
2191 \retval -1: unable to get latency timer
2192 \retval -2: USB device unavailable
2194 int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
2196 unsigned short usb_val;
2198 if (ftdi == NULL || ftdi->usb_dev == NULL)
2199 ftdi_error_return(-2, "USB device unavailable");
2201 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_GET_LATENCY_TIMER_REQUEST, 0, ftdi->index, (unsigned char *)&usb_val, 1, ftdi->usb_read_timeout) != 1)
2202 ftdi_error_return(-1, "reading latency timer failed");
2204 *latency = (unsigned char)usb_val;
2209 Poll modem status information
2211 This function allows the retrieve the two status bytes of the device.
2212 The device sends these bytes also as a header for each read access
2213 where they are discarded by ftdi_read_data(). The chip generates
2214 the two stripped status bytes in the absence of data every 40 ms.
2216 Layout of the first byte:
2217 - B0..B3 - must be 0
2218 - B4 Clear to send (CTS)
2221 - B5 Data set ready (DTS)
2224 - B6 Ring indicator (RI)
2227 - B7 Receive line signal detect (RLSD)
2231 Layout of the second byte:
2232 - B0 Data ready (DR)
2233 - B1 Overrun error (OE)
2234 - B2 Parity error (PE)
2235 - B3 Framing error (FE)
2236 - B4 Break interrupt (BI)
2237 - B5 Transmitter holding register (THRE)
2238 - B6 Transmitter empty (TEMT)
2239 - B7 Error in RCVR FIFO
2241 \param ftdi pointer to ftdi_context
2242 \param status Pointer to store status information in. Must be two bytes.
2245 \retval -1: unable to retrieve status information
2246 \retval -2: USB device unavailable
2248 int ftdi_poll_modem_status(struct ftdi_context *ftdi, unsigned short *status)
2252 if (ftdi == NULL || ftdi->usb_dev == NULL)
2253 ftdi_error_return(-2, "USB device unavailable");
2255 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_POLL_MODEM_STATUS_REQUEST, 0, ftdi->index, (unsigned char *)usb_val, 2, ftdi->usb_read_timeout) != 2)
2256 ftdi_error_return(-1, "getting modem status failed");
2258 *status = (usb_val[1] << 8) | (usb_val[0] & 0xFF);
2264 Set flowcontrol for ftdi chip
2266 \param ftdi pointer to ftdi_context
2267 \param flowctrl flow control to use. should be
2268 SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS
2271 \retval -1: set flow control failed
2272 \retval -2: USB device unavailable
2274 int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
2276 if (ftdi == NULL || ftdi->usb_dev == NULL)
2277 ftdi_error_return(-2, "USB device unavailable");
2279 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2280 SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
2281 NULL, 0, ftdi->usb_write_timeout) < 0)
2282 ftdi_error_return(-1, "set flow control failed");
2290 \param ftdi pointer to ftdi_context
2291 \param state state to set line to (1 or 0)
2294 \retval -1: set dtr failed
2295 \retval -2: USB device unavailable
2297 int ftdi_setdtr(struct ftdi_context *ftdi, int state)
2299 unsigned short usb_val;
2301 if (ftdi == NULL || ftdi->usb_dev == NULL)
2302 ftdi_error_return(-2, "USB device unavailable");
2305 usb_val = SIO_SET_DTR_HIGH;
2307 usb_val = SIO_SET_DTR_LOW;
2309 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2310 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2311 NULL, 0, ftdi->usb_write_timeout) < 0)
2312 ftdi_error_return(-1, "set dtr failed");
2320 \param ftdi pointer to ftdi_context
2321 \param state state to set line to (1 or 0)
2324 \retval -1: set rts failed
2325 \retval -2: USB device unavailable
2327 int ftdi_setrts(struct ftdi_context *ftdi, int state)
2329 unsigned short usb_val;
2331 if (ftdi == NULL || ftdi->usb_dev == NULL)
2332 ftdi_error_return(-2, "USB device unavailable");
2335 usb_val = SIO_SET_RTS_HIGH;
2337 usb_val = SIO_SET_RTS_LOW;
2339 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2340 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2341 NULL, 0, ftdi->usb_write_timeout) < 0)
2342 ftdi_error_return(-1, "set of rts failed");
2348 Set dtr and rts line in one pass
2350 \param ftdi pointer to ftdi_context
2351 \param dtr DTR state to set line to (1 or 0)
2352 \param rts RTS state to set line to (1 or 0)
2355 \retval -1: set dtr/rts failed
2356 \retval -2: USB device unavailable
2358 int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts)
2360 unsigned short usb_val;
2362 if (ftdi == NULL || ftdi->usb_dev == NULL)
2363 ftdi_error_return(-2, "USB device unavailable");
2366 usb_val = SIO_SET_DTR_HIGH;
2368 usb_val = SIO_SET_DTR_LOW;
2371 usb_val |= SIO_SET_RTS_HIGH;
2373 usb_val |= SIO_SET_RTS_LOW;
2375 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2376 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2377 NULL, 0, ftdi->usb_write_timeout) < 0)
2378 ftdi_error_return(-1, "set of rts/dtr failed");
2384 Set the special event character
2386 \param ftdi pointer to ftdi_context
2387 \param eventch Event character
2388 \param enable 0 to disable the event character, non-zero otherwise
2391 \retval -1: unable to set event character
2392 \retval -2: USB device unavailable
2394 int ftdi_set_event_char(struct ftdi_context *ftdi,
2395 unsigned char eventch, unsigned char enable)
2397 unsigned short usb_val;
2399 if (ftdi == NULL || ftdi->usb_dev == NULL)
2400 ftdi_error_return(-2, "USB device unavailable");
2406 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_EVENT_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2407 ftdi_error_return(-1, "setting event character failed");
2415 \param ftdi pointer to ftdi_context
2416 \param errorch Error character
2417 \param enable 0 to disable the error character, non-zero otherwise
2420 \retval -1: unable to set error character
2421 \retval -2: USB device unavailable
2423 int ftdi_set_error_char(struct ftdi_context *ftdi,
2424 unsigned char errorch, unsigned char enable)
2426 unsigned short usb_val;
2428 if (ftdi == NULL || ftdi->usb_dev == NULL)
2429 ftdi_error_return(-2, "USB device unavailable");
2435 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_ERROR_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2436 ftdi_error_return(-1, "setting error character failed");
2442 Init eeprom with default values for the connected device
2443 \param ftdi pointer to ftdi_context
2444 \param manufacturer String to use as Manufacturer
2445 \param product String to use as Product description
2446 \param serial String to use as Serial number description
2449 \retval -1: No struct ftdi_context
2450 \retval -2: No struct ftdi_eeprom
2451 \retval -3: No connected device or device not yet opened
2453 int ftdi_eeprom_initdefaults(struct ftdi_context *ftdi, char * manufacturer,
2454 char * product, char * serial)
2456 struct ftdi_eeprom *eeprom;
2459 ftdi_error_return(-1, "No struct ftdi_context");
2461 if (ftdi->eeprom == NULL)
2462 ftdi_error_return(-2,"No struct ftdi_eeprom");
2464 eeprom = ftdi->eeprom;
2465 memset(eeprom, 0, sizeof(struct ftdi_eeprom));
2467 if (ftdi->usb_dev == NULL)
2468 ftdi_error_return(-3, "No connected device or device not yet opened");
2470 eeprom->vendor_id = 0x0403;
2471 eeprom->use_serial = 1;
2472 if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM) ||
2473 (ftdi->type == TYPE_R))
2474 eeprom->product_id = 0x6001;
2475 else if (ftdi->type == TYPE_4232H)
2476 eeprom->product_id = 0x6011;
2477 else if (ftdi->type == TYPE_232H)
2478 eeprom->product_id = 0x6014;
2479 else if (ftdi->type == TYPE_230X)
2480 eeprom->product_id = 0x6015;
2482 eeprom->product_id = 0x6010;
2484 if (ftdi->type == TYPE_AM)
2485 eeprom->usb_version = 0x0101;
2487 eeprom->usb_version = 0x0200;
2488 eeprom->max_power = 100;
2490 if (eeprom->manufacturer)
2491 free (eeprom->manufacturer);
2492 eeprom->manufacturer = NULL;
2495 eeprom->manufacturer = (char *)malloc(strlen(manufacturer)+1);
2496 if (eeprom->manufacturer)
2497 strcpy(eeprom->manufacturer, manufacturer);
2500 if (eeprom->product)
2501 free (eeprom->product);
2502 eeprom->product = NULL;
2505 eeprom->product = (char *)malloc(strlen(product)+1);
2506 if (eeprom->product)
2507 strcpy(eeprom->product, product);
2511 const char* default_product;
2514 case TYPE_AM: default_product = "AM"; break;
2515 case TYPE_BM: default_product = "BM"; break;
2516 case TYPE_2232C: default_product = "Dual RS232"; break;
2517 case TYPE_R: default_product = "FT232R USB UART"; break;
2518 case TYPE_2232H: default_product = "Dual RS232-HS"; break;
2519 case TYPE_4232H: default_product = "FT4232H"; break;
2520 case TYPE_232H: default_product = "Single-RS232-HS"; break;
2521 case TYPE_230X: default_product = "FT230X Basic UART"; break;
2523 ftdi_error_return(-3, "Unknown chip type");
2525 eeprom->product = (char *)malloc(strlen(default_product) +1);
2526 if (eeprom->product)
2527 strcpy(eeprom->product, default_product);
2531 free (eeprom->serial);
2532 eeprom->serial = NULL;
2535 eeprom->serial = (char *)malloc(strlen(serial)+1);
2537 strcpy(eeprom->serial, serial);
2540 if (ftdi->type == TYPE_R)
2542 eeprom->max_power = 90;
2543 eeprom->size = 0x80;
2544 eeprom->cbus_function[0] = CBUS_TXLED;
2545 eeprom->cbus_function[1] = CBUS_RXLED;
2546 eeprom->cbus_function[2] = CBUS_TXDEN;
2547 eeprom->cbus_function[3] = CBUS_PWREN;
2548 eeprom->cbus_function[4] = CBUS_SLEEP;
2550 else if (ftdi->type == TYPE_230X)
2552 eeprom->max_power = 90;
2553 eeprom->size = 0x100;
2554 eeprom->cbus_function[0] = CBUSX_TXDEN;
2555 eeprom->cbus_function[1] = CBUSX_RXLED;
2556 eeprom->cbus_function[2] = CBUSX_TXLED;
2557 eeprom->cbus_function[3] = CBUSX_SLEEP;
2561 if(ftdi->type == TYPE_232H)
2564 for (i=0; i<10; i++)
2565 eeprom->cbus_function[i] = CBUSH_TRISTATE;
2572 eeprom->release_number = 0x0200;
2575 eeprom->release_number = 0x0400;
2578 eeprom->release_number = 0x0500;
2581 eeprom->release_number = 0x0600;
2584 eeprom->release_number = 0x0700;
2587 eeprom->release_number = 0x0800;
2590 eeprom->release_number = 0x0900;
2593 eeprom->release_number = 0x1000;
2596 eeprom->release_number = 0x00;
2601 int ftdi_eeprom_set_strings(struct ftdi_context *ftdi, char * manufacturer,
2602 char * product, char * serial)
2604 struct ftdi_eeprom *eeprom;
2607 ftdi_error_return(-1, "No struct ftdi_context");
2609 if (ftdi->eeprom == NULL)
2610 ftdi_error_return(-2,"No struct ftdi_eeprom");
2612 eeprom = ftdi->eeprom;
2614 if (ftdi->usb_dev == NULL)
2615 ftdi_error_return(-3, "No connected device or device not yet opened");
2619 if (eeprom->manufacturer)
2620 free (eeprom->manufacturer);
2621 eeprom->manufacturer = (char *)malloc(strlen(manufacturer)+1);
2622 if (eeprom->manufacturer)
2623 strcpy(eeprom->manufacturer, manufacturer);
2628 if (eeprom->product)
2629 free (eeprom->product);
2630 eeprom->product = (char *)malloc(strlen(product)+1);
2631 if (eeprom->product)
2632 strcpy(eeprom->product, product);
2638 free (eeprom->serial);
2639 eeprom->serial = (char *)malloc(strlen(serial)+1);
2642 strcpy(eeprom->serial, serial);
2643 eeprom->use_serial = 1;
2650 Return device ID strings from the eeprom. Device needs to be connected.
2652 The parameters manufacturer, description and serial may be NULL
2653 or pointer to buffers to store the fetched strings.
2655 \param ftdi pointer to ftdi_context
2656 \param manufacturer Store manufacturer string here if not NULL
2657 \param mnf_len Buffer size of manufacturer string
2658 \param product Store product description string here if not NULL
2659 \param prod_len Buffer size of product description string
2660 \param serial Store serial string here if not NULL
2661 \param serial_len Buffer size of serial string
2664 \retval -1: ftdi context invalid
2665 \retval -2: ftdi eeprom buffer invalid
2667 int ftdi_eeprom_get_strings(struct ftdi_context *ftdi,
2668 char *manufacturer, int mnf_len,
2669 char *product, int prod_len,
2670 char *serial, int serial_len)
2672 struct ftdi_eeprom *eeprom;
2675 ftdi_error_return(-1, "No struct ftdi_context");
2676 if (ftdi->eeprom == NULL)
2677 ftdi_error_return(-2, "No struct ftdi_eeprom");
2679 eeprom = ftdi->eeprom;
2683 strncpy(manufacturer, eeprom->manufacturer, mnf_len);
2685 manufacturer[mnf_len - 1] = '\0';
2690 strncpy(product, eeprom->product, prod_len);
2692 product[prod_len - 1] = '\0';
2697 strncpy(serial, eeprom->serial, serial_len);
2699 serial[serial_len - 1] = '\0';
2705 /*FTD2XX doesn't check for values not fitting in the ACBUS Signal options*/
2706 void set_ft232h_cbus(struct ftdi_eeprom *eeprom, unsigned char * output)
2711 int mode_low, mode_high;
2712 if (eeprom->cbus_function[2*i]> CBUSH_CLK7_5)
2713 mode_low = CBUSH_TRISTATE;
2715 mode_low = eeprom->cbus_function[2*i];
2716 if (eeprom->cbus_function[2*i+1]> CBUSH_CLK7_5)
2717 mode_high = CBUSH_TRISTATE;
2719 mode_high = eeprom->cbus_function[2*i+1];
2721 output[0x18+i] = (mode_high <<4) | mode_low;
2724 /* Return the bits for the encoded EEPROM Structure of a requested Mode
2727 static unsigned char type2bit(unsigned char type, enum ftdi_chip_type chip)
2736 case CHANNEL_IS_UART: return 0;
2737 case CHANNEL_IS_FIFO: return 0x01;
2738 case CHANNEL_IS_OPTO: return 0x02;
2739 case CHANNEL_IS_CPU : return 0x04;
2747 case CHANNEL_IS_UART : return 0;
2748 case CHANNEL_IS_FIFO : return 0x01;
2749 case CHANNEL_IS_OPTO : return 0x02;
2750 case CHANNEL_IS_CPU : return 0x04;
2751 case CHANNEL_IS_FT1284 : return 0x08;
2759 case CHANNEL_IS_UART : return 0;
2760 case CHANNEL_IS_FIFO : return 0x01;
2764 case TYPE_230X: /* FT230X is only UART */
2771 Build binary buffer from ftdi_eeprom structure.
2772 Output is suitable for ftdi_write_eeprom().
2774 \param ftdi pointer to ftdi_context
2776 \retval >=0: size of eeprom user area in bytes
2777 \retval -1: eeprom size (128 bytes) exceeded by custom strings
2778 \retval -2: Invalid eeprom or ftdi pointer
2779 \retval -3: Invalid cbus function setting (FIXME: Not in the code?)
2780 \retval -4: Chip doesn't support invert (FIXME: Not in the code?)
2781 \retval -5: Chip doesn't support high current drive (FIXME: Not in the code?)
2782 \retval -6: No connected EEPROM or EEPROM Type unknown
2784 int ftdi_eeprom_build(struct ftdi_context *ftdi)
2786 unsigned char i, j, eeprom_size_mask;
2787 unsigned short checksum, value;
2788 unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
2789 int user_area_size, free_start, free_end;
2790 struct ftdi_eeprom *eeprom;
2791 unsigned char * output;
2794 ftdi_error_return(-2,"No context");
2795 if (ftdi->eeprom == NULL)
2796 ftdi_error_return(-2,"No eeprom structure");
2798 eeprom= ftdi->eeprom;
2799 output = eeprom->buf;
2801 if (eeprom->chip == -1)
2802 ftdi_error_return(-6,"No connected EEPROM or EEPROM type unknown");
2804 if (eeprom->size == -1)
2806 if ((eeprom->chip == 0x56) || (eeprom->chip == 0x66))
2807 eeprom->size = 0x100;
2809 eeprom->size = 0x80;
2812 if (eeprom->manufacturer != NULL)
2813 manufacturer_size = strlen(eeprom->manufacturer);
2814 if (eeprom->product != NULL)
2815 product_size = strlen(eeprom->product);
2816 if (eeprom->serial != NULL)
2817 serial_size = strlen(eeprom->serial);
2819 // eeprom size check
2825 user_area_size = 96; // base size for strings (total of 48 characters)
2828 user_area_size = 90; // two extra config bytes and 4 bytes PnP stuff
2831 user_area_size = 88; // four extra config bytes + 4 bytes PnP stuff
2833 case TYPE_2232H: // six extra config bytes + 4 bytes PnP stuff
2835 user_area_size = 86;
2838 user_area_size = 80;
2844 user_area_size -= (manufacturer_size + product_size + serial_size) * 2;
2846 if (user_area_size < 0)
2847 ftdi_error_return(-1,"eeprom size exceeded");
2850 if (ftdi->type == TYPE_230X)
2852 /* FT230X have a reserved section in the middle of the MTP,
2853 which cannot be written to, but must be included in the checksum */
2854 memset(ftdi->eeprom->buf, 0, 0x80);
2855 memset((ftdi->eeprom->buf + 0xa0), 0, (FTDI_MAX_EEPROM_SIZE - 0xa0));
2859 memset(ftdi->eeprom->buf, 0, FTDI_MAX_EEPROM_SIZE);
2862 // Bytes and Bits set for all Types
2864 // Addr 02: Vendor ID
2865 output[0x02] = eeprom->vendor_id;
2866 output[0x03] = eeprom->vendor_id >> 8;
2868 // Addr 04: Product ID
2869 output[0x04] = eeprom->product_id;
2870 output[0x05] = eeprom->product_id >> 8;
2872 // Addr 06: Device release number (0400h for BM features)
2873 output[0x06] = eeprom->release_number;
2874 output[0x07] = eeprom->release_number >> 8;
2876 // Addr 08: Config descriptor
2878 // Bit 6: 1 if this device is self powered, 0 if bus powered
2879 // Bit 5: 1 if this device uses remote wakeup
2880 // Bit 4-0: reserved - 0
2882 if (eeprom->self_powered)
2884 if (eeprom->remote_wakeup)
2888 // Addr 09: Max power consumption: max power = value * 2 mA
2889 output[0x09] = eeprom->max_power / MAX_POWER_MILLIAMP_PER_UNIT;
2891 if ((ftdi->type != TYPE_AM) && (ftdi->type != TYPE_230X))
2893 // Addr 0A: Chip configuration
2894 // Bit 7: 0 - reserved
2895 // Bit 6: 0 - reserved
2896 // Bit 5: 0 - reserved
2897 // Bit 4: 1 - Change USB version
2898 // Bit 3: 1 - Use the serial number string
2899 // Bit 2: 1 - Enable suspend pull downs for lower power
2900 // Bit 1: 1 - Out EndPoint is Isochronous
2901 // Bit 0: 1 - In EndPoint is Isochronous
2904 if (eeprom->in_is_isochronous)
2906 if (eeprom->out_is_isochronous)
2912 // Strings start at 0x94 (TYPE_AM, TYPE_BM)
2913 // 0x96 (TYPE_2232C), 0x98 (TYPE_R) and 0x9a (TYPE_x232H)
2934 /* Wrap around 0x80 for 128 byte EEPROMS (Internale and 93x46) */
2935 eeprom_size_mask = eeprom->size -1;
2936 free_end = i & eeprom_size_mask;
2938 // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
2939 // Addr 0F: Length of manufacturer string
2940 // Output manufacturer
2941 output[0x0E] = i; // calculate offset
2942 output[i & eeprom_size_mask] = manufacturer_size*2 + 2, i++;
2943 output[i & eeprom_size_mask] = 0x03, i++; // type: string
2944 for (j = 0; j < manufacturer_size; j++)
2946 output[i & eeprom_size_mask] = eeprom->manufacturer[j], i++;
2947 output[i & eeprom_size_mask] = 0x00, i++;
2949 output[0x0F] = manufacturer_size*2 + 2;
2951 // Addr 10: Offset of the product string + 0x80, calculated later
2952 // Addr 11: Length of product string
2953 output[0x10] = i | 0x80; // calculate offset
2954 output[i & eeprom_size_mask] = product_size*2 + 2, i++;
2955 output[i & eeprom_size_mask] = 0x03, i++;
2956 for (j = 0; j < product_size; j++)
2958 output[i & eeprom_size_mask] = eeprom->product[j], i++;
2959 output[i & eeprom_size_mask] = 0x00, i++;
2961 output[0x11] = product_size*2 + 2;
2963 // Addr 12: Offset of the serial string + 0x80, calculated later
2964 // Addr 13: Length of serial string
2965 output[0x12] = i | 0x80; // calculate offset
2966 output[i & eeprom_size_mask] = serial_size*2 + 2, i++;
2967 output[i & eeprom_size_mask] = 0x03, i++;
2968 for (j = 0; j < serial_size; j++)
2970 output[i & eeprom_size_mask] = eeprom->serial[j], i++;
2971 output[i & eeprom_size_mask] = 0x00, i++;
2974 // Legacy port name and PnP fields for FT2232 and newer chips
2975 if (ftdi->type > TYPE_BM)
2977 output[i & eeprom_size_mask] = 0x02; /* as seen when written with FTD2XX */
2979 output[i & eeprom_size_mask] = 0x03; /* as seen when written with FTD2XX */
2981 output[i & eeprom_size_mask] = eeprom->is_not_pnp; /* as seen when written with FTD2XX */
2985 output[0x13] = serial_size*2 + 2;
2987 if (ftdi->type > TYPE_AM) /* use_serial not used in AM devices */
2989 if (eeprom->use_serial)
2990 output[0x0A] |= USE_SERIAL_NUM;
2992 output[0x0A] &= ~USE_SERIAL_NUM;
2995 /* Bytes and Bits specific to (some) types
2996 Write linear, as this allows easier fixing*/
3002 output[0x0C] = eeprom->usb_version & 0xff;
3003 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
3004 if (eeprom->use_usb_version)
3005 output[0x0A] |= USE_USB_VERSION_BIT;
3007 output[0x0A] &= ~USE_USB_VERSION_BIT;
3012 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232C);
3013 if ( eeprom->channel_a_driver == DRIVER_VCP)
3014 output[0x00] |= DRIVER_VCP;
3016 output[0x00] &= ~DRIVER_VCP;
3018 if ( eeprom->high_current_a == HIGH_CURRENT_DRIVE)
3019 output[0x00] |= HIGH_CURRENT_DRIVE;
3021 output[0x00] &= ~HIGH_CURRENT_DRIVE;
3023 output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232C);
3024 if ( eeprom->channel_b_driver == DRIVER_VCP)
3025 output[0x01] |= DRIVER_VCP;
3027 output[0x01] &= ~DRIVER_VCP;
3029 if ( eeprom->high_current_b == HIGH_CURRENT_DRIVE)
3030 output[0x01] |= HIGH_CURRENT_DRIVE;
3032 output[0x01] &= ~HIGH_CURRENT_DRIVE;
3034 if (eeprom->in_is_isochronous)
3035 output[0x0A] |= 0x1;
3037 output[0x0A] &= ~0x1;
3038 if (eeprom->out_is_isochronous)
3039 output[0x0A] |= 0x2;
3041 output[0x0A] &= ~0x2;
3042 if (eeprom->suspend_pull_downs)
3043 output[0x0A] |= 0x4;
3045 output[0x0A] &= ~0x4;
3046 if (eeprom->use_usb_version)
3047 output[0x0A] |= USE_USB_VERSION_BIT;
3049 output[0x0A] &= ~USE_USB_VERSION_BIT;
3051 output[0x0C] = eeprom->usb_version & 0xff;
3052 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
3053 output[0x14] = eeprom->chip;
3056 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_R);
3057 if (eeprom->high_current == HIGH_CURRENT_DRIVE_R)
3058 output[0x00] |= HIGH_CURRENT_DRIVE_R;
3059 if (eeprom->external_oscillator)
3060 output[0x00] |= 0x02;
3061 output[0x01] = 0x40; /* Hard coded Endpoint Size*/
3063 if (eeprom->suspend_pull_downs)
3064 output[0x0A] |= 0x4;
3066 output[0x0A] &= ~0x4;
3067 output[0x0B] = eeprom->invert;
3068 output[0x0C] = eeprom->usb_version & 0xff;
3069 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
3071 if (eeprom->cbus_function[0] > CBUS_BB_RD)
3072 output[0x14] = CBUS_TXLED;
3074 output[0x14] = eeprom->cbus_function[0];
3076 if (eeprom->cbus_function[1] > CBUS_BB_RD)
3077 output[0x14] |= CBUS_RXLED<<4;
3079 output[0x14] |= eeprom->cbus_function[1]<<4;
3081 if (eeprom->cbus_function[2] > CBUS_BB_RD)
3082 output[0x15] = CBUS_TXDEN;
3084 output[0x15] = eeprom->cbus_function[2];
3086 if (eeprom->cbus_function[3] > CBUS_BB_RD)
3087 output[0x15] |= CBUS_PWREN<<4;
3089 output[0x15] |= eeprom->cbus_function[3]<<4;
3091 if (eeprom->cbus_function[4] > CBUS_CLK6)
3092 output[0x16] = CBUS_SLEEP;
3094 output[0x16] = eeprom->cbus_function[4];
3097 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232H);
3098 if ( eeprom->channel_a_driver == DRIVER_VCP)
3099 output[0x00] |= DRIVER_VCP;
3101 output[0x00] &= ~DRIVER_VCP;
3103 output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232H);
3104 if ( eeprom->channel_b_driver == DRIVER_VCP)
3105 output[0x01] |= DRIVER_VCP;
3107 output[0x01] &= ~DRIVER_VCP;
3108 if (eeprom->suspend_dbus7 == SUSPEND_DBUS7_BIT)
3109 output[0x01] |= SUSPEND_DBUS7_BIT;
3111 output[0x01] &= ~SUSPEND_DBUS7_BIT;
3113 if (eeprom->suspend_pull_downs)
3114 output[0x0A] |= 0x4;
3116 output[0x0A] &= ~0x4;
3118 if (eeprom->group0_drive > DRIVE_16MA)
3119 output[0x0c] |= DRIVE_16MA;
3121 output[0x0c] |= eeprom->group0_drive;
3122 if (eeprom->group0_schmitt == IS_SCHMITT)
3123 output[0x0c] |= IS_SCHMITT;
3124 if (eeprom->group0_slew == SLOW_SLEW)
3125 output[0x0c] |= SLOW_SLEW;
3127 if (eeprom->group1_drive > DRIVE_16MA)
3128 output[0x0c] |= DRIVE_16MA<<4;
3130 output[0x0c] |= eeprom->group1_drive<<4;
3131 if (eeprom->group1_schmitt == IS_SCHMITT)
3132 output[0x0c] |= IS_SCHMITT<<4;
3133 if (eeprom->group1_slew == SLOW_SLEW)
3134 output[0x0c] |= SLOW_SLEW<<4;
3136 if (eeprom->group2_drive > DRIVE_16MA)
3137 output[0x0d] |= DRIVE_16MA;
3139 output[0x0d] |= eeprom->group2_drive;
3140 if (eeprom->group2_schmitt == IS_SCHMITT)
3141 output[0x0d] |= IS_SCHMITT;
3142 if (eeprom->group2_slew == SLOW_SLEW)
3143 output[0x0d] |= SLOW_SLEW;
3145 if (eeprom->group3_drive > DRIVE_16MA)
3146 output[0x0d] |= DRIVE_16MA<<4;
3148 output[0x0d] |= eeprom->group3_drive<<4;
3149 if (eeprom->group3_schmitt == IS_SCHMITT)
3150 output[0x0d] |= IS_SCHMITT<<4;
3151 if (eeprom->group3_slew == SLOW_SLEW)
3152 output[0x0d] |= SLOW_SLEW<<4;
3154 output[0x18] = eeprom->chip;
3158 if (eeprom->channel_a_driver == DRIVER_VCP)
3159 output[0x00] |= DRIVER_VCP;
3161 output[0x00] &= ~DRIVER_VCP;
3162 if (eeprom->channel_b_driver == DRIVER_VCP)
3163 output[0x01] |= DRIVER_VCP;
3165 output[0x01] &= ~DRIVER_VCP;
3166 if (eeprom->channel_c_driver == DRIVER_VCP)
3167 output[0x00] |= (DRIVER_VCP << 4);
3169 output[0x00] &= ~(DRIVER_VCP << 4);
3170 if (eeprom->channel_d_driver == DRIVER_VCP)
3171 output[0x01] |= (DRIVER_VCP << 4);
3173 output[0x01] &= ~(DRIVER_VCP << 4);
3175 if (eeprom->suspend_pull_downs)
3176 output[0x0a] |= 0x4;
3178 output[0x0a] &= ~0x4;
3180 if (eeprom->channel_a_rs485enable)
3181 output[0x0b] |= CHANNEL_IS_RS485 << 0;
3183 output[0x0b] &= ~(CHANNEL_IS_RS485 << 0);
3184 if (eeprom->channel_b_rs485enable)
3185 output[0x0b] |= CHANNEL_IS_RS485 << 1;
3187 output[0x0b] &= ~(CHANNEL_IS_RS485 << 1);
3188 if (eeprom->channel_c_rs485enable)
3189 output[0x0b] |= CHANNEL_IS_RS485 << 2;
3191 output[0x0b] &= ~(CHANNEL_IS_RS485 << 2);
3192 if (eeprom->channel_d_rs485enable)
3193 output[0x0b] |= CHANNEL_IS_RS485 << 3;
3195 output[0x0b] &= ~(CHANNEL_IS_RS485 << 3);
3197 if (eeprom->group0_drive > DRIVE_16MA)
3198 output[0x0c] |= DRIVE_16MA;
3200 output[0x0c] |= eeprom->group0_drive;
3201 if (eeprom->group0_schmitt == IS_SCHMITT)
3202 output[0x0c] |= IS_SCHMITT;
3203 if (eeprom->group0_slew == SLOW_SLEW)
3204 output[0x0c] |= SLOW_SLEW;
3206 if (eeprom->group1_drive > DRIVE_16MA)
3207 output[0x0c] |= DRIVE_16MA<<4;
3209 output[0x0c] |= eeprom->group1_drive<<4;
3210 if (eeprom->group1_schmitt == IS_SCHMITT)
3211 output[0x0c] |= IS_SCHMITT<<4;
3212 if (eeprom->group1_slew == SLOW_SLEW)
3213 output[0x0c] |= SLOW_SLEW<<4;
3215 if (eeprom->group2_drive > DRIVE_16MA)
3216 output[0x0d] |= DRIVE_16MA;
3218 output[0x0d] |= eeprom->group2_drive;
3219 if (eeprom->group2_schmitt == IS_SCHMITT)
3220 output[0x0d] |= IS_SCHMITT;
3221 if (eeprom->group2_slew == SLOW_SLEW)
3222 output[0x0d] |= SLOW_SLEW;
3224 if (eeprom->group3_drive > DRIVE_16MA)
3225 output[0x0d] |= DRIVE_16MA<<4;
3227 output[0x0d] |= eeprom->group3_drive<<4;
3228 if (eeprom->group3_schmitt == IS_SCHMITT)
3229 output[0x0d] |= IS_SCHMITT<<4;
3230 if (eeprom->group3_slew == SLOW_SLEW)
3231 output[0x0d] |= SLOW_SLEW<<4;
3233 output[0x18] = eeprom->chip;
3237 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_232H);
3238 if ( eeprom->channel_a_driver == DRIVER_VCP)
3239 output[0x00] |= DRIVER_VCPH;
3241 output[0x00] &= ~DRIVER_VCPH;
3242 if (eeprom->powersave)
3243 output[0x01] |= POWER_SAVE_DISABLE_H;
3245 output[0x01] &= ~POWER_SAVE_DISABLE_H;
3247 if (eeprom->suspend_pull_downs)
3248 output[0x0a] |= 0x4;
3250 output[0x0a] &= ~0x4;
3252 if (eeprom->clock_polarity)
3253 output[0x01] |= FT1284_CLK_IDLE_STATE;
3255 output[0x01] &= ~FT1284_CLK_IDLE_STATE;
3256 if (eeprom->data_order)
3257 output[0x01] |= FT1284_DATA_LSB;
3259 output[0x01] &= ~FT1284_DATA_LSB;
3260 if (eeprom->flow_control)
3261 output[0x01] |= FT1284_FLOW_CONTROL;
3263 output[0x01] &= ~FT1284_FLOW_CONTROL;
3264 if (eeprom->group0_drive > DRIVE_16MA)
3265 output[0x0c] |= DRIVE_16MA;
3267 output[0x0c] |= eeprom->group0_drive;
3268 if (eeprom->group0_schmitt == IS_SCHMITT)
3269 output[0x0c] |= IS_SCHMITT;
3270 if (eeprom->group0_slew == SLOW_SLEW)
3271 output[0x0c] |= SLOW_SLEW;
3273 if (eeprom->group1_drive > DRIVE_16MA)
3274 output[0x0d] |= DRIVE_16MA;
3276 output[0x0d] |= eeprom->group1_drive;
3277 if (eeprom->group1_schmitt == IS_SCHMITT)
3278 output[0x0d] |= IS_SCHMITT;
3279 if (eeprom->group1_slew == SLOW_SLEW)
3280 output[0x0d] |= SLOW_SLEW;
3282 set_ft232h_cbus(eeprom, output);
3284 output[0x1e] = eeprom->chip;
3285 fprintf(stderr,"FIXME: Build FT232H specific EEPROM settings\n");
3288 output[0x00] = 0x80; /* Actually, leave the default value */
3289 /*FIXME: Make DBUS & CBUS Control configurable*/
3290 output[0x0c] = 0; /* DBUS drive 4mA, CBUS drive 4 mA like factory default */
3291 for (j = 0; j <= 6; j++)
3293 output[0x1a + j] = eeprom->cbus_function[j];
3295 output[0x0b] = eeprom->invert;
3299 /* First address without use */
3319 /* Arbitrary user data */
3320 if (eeprom->user_data && eeprom->user_data_size >= 0)
3322 if (eeprom->user_data_addr < free_start)
3323 fprintf(stderr,"Warning, user data starts inside the generated data!\n");
3324 if (eeprom->user_data_addr + eeprom->user_data_size >= free_end)
3325 fprintf(stderr,"Warning, user data overlaps the strings area!\n");
3326 if (eeprom->user_data_addr + eeprom->user_data_size > eeprom->size)
3327 ftdi_error_return(-1,"eeprom size exceeded");
3328 memcpy(output + eeprom->user_data_addr, eeprom->user_data, eeprom->user_data_size);
3331 // calculate checksum
3334 for (i = 0; i < eeprom->size/2-1; i++)
3336 if ((ftdi->type == TYPE_230X) && (i == 0x12))
3338 /* FT230X has a user section in the MTP which is not part of the checksum */
3341 if ((ftdi->type == TYPE_230X) && (i >= 0x40) && (i < 0x50)) {
3343 if (ftdi_read_eeprom_location(ftdi, i, &data)) {
3344 fprintf(stderr, "Reading Factory Configuration Data failed\n");
3350 value = output[i*2];
3351 value += output[(i*2)+1] << 8;
3353 checksum = value^checksum;
3354 checksum = (checksum << 1) | (checksum >> 15);
3357 output[eeprom->size-2] = checksum;
3358 output[eeprom->size-1] = checksum >> 8;
3360 eeprom->initialized_for_connected_device = 1;
3361 return user_area_size;
3363 /* Decode the encoded EEPROM field for the FTDI Mode into a value for the abstracted
3366 * FTD2XX doesn't allow to set multiple bits in the interface mode bitfield, and so do we
3368 static unsigned char bit2type(unsigned char bits)
3372 case 0: return CHANNEL_IS_UART;
3373 case 1: return CHANNEL_IS_FIFO;
3374 case 2: return CHANNEL_IS_OPTO;
3375 case 4: return CHANNEL_IS_CPU;
3376 case 8: return CHANNEL_IS_FT1284;
3378 fprintf(stderr," Unexpected value %d for Hardware Interface type\n",
3383 /* Decode 230X / 232R type chips invert bits
3384 * Prints directly to stdout.
3386 static void print_inverted_bits(int invert)
3388 const char *r_bits[] = {"TXD","RXD","RTS","CTS","DTR","DSR","DCD","RI"};
3391 fprintf(stdout,"Inverted bits:");
3393 if ((invert & (1<<i)) == (1<<i))
3394 fprintf(stdout," %s",r_bits[i]);
3396 fprintf(stdout,"\n");
3399 Decode binary EEPROM image into an ftdi_eeprom structure.
3401 For FT-X devices use AN_201 FT-X MTP memory Configuration to decode.
3403 \param ftdi pointer to ftdi_context
3404 \param verbose Decode EEPROM on stdout
3407 \retval -1: something went wrong
3409 FIXME: How to pass size? How to handle size field in ftdi_eeprom?
3410 FIXME: Strings are malloc'ed here and should be freed somewhere
3412 int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
3415 unsigned short checksum, eeprom_checksum, value;
3416 unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
3418 struct ftdi_eeprom *eeprom;
3419 unsigned char *buf = NULL;
3422 ftdi_error_return(-1,"No context");
3423 if (ftdi->eeprom == NULL)
3424 ftdi_error_return(-1,"No eeprom structure");
3426 eeprom = ftdi->eeprom;
3427 eeprom_size = eeprom->size;
3428 buf = ftdi->eeprom->buf;
3430 // Addr 02: Vendor ID
3431 eeprom->vendor_id = buf[0x02] + (buf[0x03] << 8);
3433 // Addr 04: Product ID
3434 eeprom->product_id = buf[0x04] + (buf[0x05] << 8);
3436 // Addr 06: Device release number
3437 eeprom->release_number = buf[0x06] + (buf[0x07]<<8);
3439 // Addr 08: Config descriptor
3441 // Bit 6: 1 if this device is self powered, 0 if bus powered
3442 // Bit 5: 1 if this device uses remote wakeup
3443 eeprom->self_powered = buf[0x08] & 0x40;
3444 eeprom->remote_wakeup = buf[0x08] & 0x20;
3446 // Addr 09: Max power consumption: max power = value * 2 mA
3447 eeprom->max_power = MAX_POWER_MILLIAMP_PER_UNIT * buf[0x09];
3449 // Addr 0A: Chip configuration
3450 // Bit 7: 0 - reserved
3451 // Bit 6: 0 - reserved
3452 // Bit 5: 0 - reserved
3453 // Bit 4: 1 - Change USB version on BM and 2232C
3454 // Bit 3: 1 - Use the serial number string
3455 // Bit 2: 1 - Enable suspend pull downs for lower power
3456 // Bit 1: 1 - Out EndPoint is Isochronous
3457 // Bit 0: 1 - In EndPoint is Isochronous
3459 eeprom->in_is_isochronous = buf[0x0A]&0x01;
3460 eeprom->out_is_isochronous = buf[0x0A]&0x02;
3461 eeprom->suspend_pull_downs = buf[0x0A]&0x04;
3462 eeprom->use_serial = !!(buf[0x0A] & USE_SERIAL_NUM);
3463 eeprom->use_usb_version = !!(buf[0x0A] & USE_USB_VERSION_BIT);
3465 // Addr 0C: USB version low byte when 0x0A
3466 // Addr 0D: USB version high byte when 0x0A
3467 eeprom->usb_version = buf[0x0C] + (buf[0x0D] << 8);
3469 // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
3470 // Addr 0F: Length of manufacturer string
3471 manufacturer_size = buf[0x0F]/2;
3472 if (eeprom->manufacturer)
3473 free(eeprom->manufacturer);
3474 if (manufacturer_size > 0)
3476 eeprom->manufacturer = (char *)malloc(manufacturer_size);
3477 if (eeprom->manufacturer)
3479 // Decode manufacturer
3480 i = buf[0x0E] & (eeprom_size -1); // offset
3481 for (j=0; j<manufacturer_size-1; j++)
3483 eeprom->manufacturer[j] = buf[2*j+i+2];
3485 eeprom->manufacturer[j] = '\0';
3488 else eeprom->manufacturer = NULL;
3490 // Addr 10: Offset of the product string + 0x80, calculated later
3491 // Addr 11: Length of product string
3492 if (eeprom->product)
3493 free(eeprom->product);
3494 product_size = buf[0x11]/2;
3495 if (product_size > 0)
3497 eeprom->product = (char *)malloc(product_size);
3498 if (eeprom->product)
3500 // Decode product name
3501 i = buf[0x10] & (eeprom_size -1); // offset
3502 for (j=0; j<product_size-1; j++)
3504 eeprom->product[j] = buf[2*j+i+2];
3506 eeprom->product[j] = '\0';
3509 else eeprom->product = NULL;
3511 // Addr 12: Offset of the serial string + 0x80, calculated later
3512 // Addr 13: Length of serial string
3514 free(eeprom->serial);
3515 serial_size = buf[0x13]/2;
3516 if (serial_size > 0)
3518 eeprom->serial = (char *)malloc(serial_size);
3522 i = buf[0x12] & (eeprom_size -1); // offset
3523 for (j=0; j<serial_size-1; j++)
3525 eeprom->serial[j] = buf[2*j+i+2];
3527 eeprom->serial[j] = '\0';
3530 else eeprom->serial = NULL;
3535 for (i = 0; i < eeprom_size/2-1; i++)
3537 if ((ftdi->type == TYPE_230X) && (i == 0x12))
3539 /* FT230X has a user section in the MTP which is not part of the checksum */
3543 value += buf[(i*2)+1] << 8;
3545 checksum = value^checksum;
3546 checksum = (checksum << 1) | (checksum >> 15);
3549 eeprom_checksum = buf[eeprom_size-2] + (buf[eeprom_size-1] << 8);
3551 if (eeprom_checksum != checksum)
3553 fprintf(stderr, "Checksum Error: %04x %04x\n", checksum, eeprom_checksum);
3554 ftdi_error_return(-1,"EEPROM checksum error");
3557 eeprom->channel_a_type = 0;
3558 if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM))
3562 else if (ftdi->type == TYPE_2232C)
3564 eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
3565 eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
3566 eeprom->high_current_a = buf[0x00] & HIGH_CURRENT_DRIVE;
3567 eeprom->channel_b_type = buf[0x01] & 0x7;
3568 eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3569 eeprom->high_current_b = buf[0x01] & HIGH_CURRENT_DRIVE;
3570 eeprom->chip = buf[0x14];
3572 else if (ftdi->type == TYPE_R)
3574 /* TYPE_R flags D2XX, not VCP as all others*/
3575 eeprom->channel_a_driver = ~buf[0x00] & DRIVER_VCP;
3576 eeprom->high_current = buf[0x00] & HIGH_CURRENT_DRIVE_R;
3577 eeprom->external_oscillator = buf[0x00] & 0x02;
3578 if ( (buf[0x01]&0x40) != 0x40)
3580 "TYPE_R EEPROM byte[0x01] Bit 6 unexpected Endpoint size."
3581 " If this happened with the\n"
3582 " EEPROM programmed by FTDI tools, please report "
3583 "to libftdi@developer.intra2net.com\n");
3585 eeprom->chip = buf[0x16];
3586 // Addr 0B: Invert data lines
3587 // Works only on FT232R, not FT245R, but no way to distinguish
3588 eeprom->invert = buf[0x0B];
3589 // Addr 14: CBUS function: CBUS0, CBUS1
3590 // Addr 15: CBUS function: CBUS2, CBUS3
3591 // Addr 16: CBUS function: CBUS5
3592 eeprom->cbus_function[0] = buf[0x14] & 0x0f;
3593 eeprom->cbus_function[1] = (buf[0x14] >> 4) & 0x0f;
3594 eeprom->cbus_function[2] = buf[0x15] & 0x0f;
3595 eeprom->cbus_function[3] = (buf[0x15] >> 4) & 0x0f;
3596 eeprom->cbus_function[4] = buf[0x16] & 0x0f;
3598 else if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3600 eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
3601 eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3603 if (ftdi->type == TYPE_2232H)
3605 eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
3606 eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
3607 eeprom->suspend_dbus7 = buf[0x01] & SUSPEND_DBUS7_BIT;
3611 eeprom->channel_c_driver = (buf[0x00] >> 4) & DRIVER_VCP;
3612 eeprom->channel_d_driver = (buf[0x01] >> 4) & DRIVER_VCP;
3613 eeprom->channel_a_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 0);
3614 eeprom->channel_b_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 1);
3615 eeprom->channel_c_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 2);
3616 eeprom->channel_d_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 3);
3619 eeprom->chip = buf[0x18];
3620 eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3621 eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3622 eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3623 eeprom->group1_drive = (buf[0x0c] >> 4) & 0x3;
3624 eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
3625 eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
3626 eeprom->group2_drive = buf[0x0d] & DRIVE_16MA;
3627 eeprom->group2_schmitt = buf[0x0d] & IS_SCHMITT;
3628 eeprom->group2_slew = buf[0x0d] & SLOW_SLEW;
3629 eeprom->group3_drive = (buf[0x0d] >> 4) & DRIVE_16MA;
3630 eeprom->group3_schmitt = (buf[0x0d] >> 4) & IS_SCHMITT;
3631 eeprom->group3_slew = (buf[0x0d] >> 4) & SLOW_SLEW;
3633 else if (ftdi->type == TYPE_232H)
3635 eeprom->channel_a_type = buf[0x00] & 0xf;
3636 eeprom->channel_a_driver = (buf[0x00] & DRIVER_VCPH)?DRIVER_VCP:0;
3637 eeprom->clock_polarity = buf[0x01] & FT1284_CLK_IDLE_STATE;
3638 eeprom->data_order = buf[0x01] & FT1284_DATA_LSB;
3639 eeprom->flow_control = buf[0x01] & FT1284_FLOW_CONTROL;
3640 eeprom->powersave = buf[0x01] & POWER_SAVE_DISABLE_H;
3641 eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3642 eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3643 eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3644 eeprom->group1_drive = buf[0x0d] & DRIVE_16MA;
3645 eeprom->group1_schmitt = buf[0x0d] & IS_SCHMITT;
3646 eeprom->group1_slew = buf[0x0d] & SLOW_SLEW;
3650 eeprom->cbus_function[2*i ] = buf[0x18+i] & 0x0f;
3651 eeprom->cbus_function[2*i+1] = (buf[0x18+i] >> 4) & 0x0f;
3653 eeprom->chip = buf[0x1e];
3654 /*FIXME: Decipher more values*/
3656 else if (ftdi->type == TYPE_230X)
3660 eeprom->cbus_function[i] = buf[0x1a + i] & 0xFF;
3662 eeprom->group0_drive = buf[0x0c] & 0x03;
3663 eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3664 eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3665 eeprom->group1_drive = (buf[0x0c] >> 4) & 0x03;
3666 eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
3667 eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
3669 eeprom->invert = buf[0xb];
3674 const char *channel_mode[] = {"UART", "FIFO", "CPU", "OPTO", "FT1284"};
3675 fprintf(stdout, "VID: 0x%04x\n",eeprom->vendor_id);
3676 fprintf(stdout, "PID: 0x%04x\n",eeprom->product_id);
3677 fprintf(stdout, "Release: 0x%04x\n",eeprom->release_number);
3679 if (eeprom->self_powered)
3680 fprintf(stdout, "Self-Powered%s", (eeprom->remote_wakeup)?", USB Remote Wake Up\n":"\n");
3682 fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power,
3683 (eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
3684 if (eeprom->manufacturer)
3685 fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
3686 if (eeprom->product)
3687 fprintf(stdout, "Product: %s\n",eeprom->product);
3689 fprintf(stdout, "Serial: %s\n",eeprom->serial);
3690 fprintf(stdout, "Checksum : %04x\n", checksum);
3691 if (ftdi->type == TYPE_R) {
3692 fprintf(stdout, "Internal EEPROM\n");
3693 fprintf(stdout,"Oscillator: %s\n", eeprom->external_oscillator?"External":"Internal");
3695 else if (eeprom->chip >= 0x46)
3696 fprintf(stdout, "Attached EEPROM: 93x%02x\n", eeprom->chip);
3697 if (eeprom->suspend_dbus7)
3698 fprintf(stdout, "Suspend on DBUS7\n");
3699 if (eeprom->suspend_pull_downs)
3700 fprintf(stdout, "Pull IO pins low during suspend\n");
3701 if(eeprom->powersave)
3703 if(ftdi->type >= TYPE_232H)
3704 fprintf(stdout,"Enter low power state on ACBUS7\n");
3706 if (eeprom->remote_wakeup)
3707 fprintf(stdout, "Enable Remote Wake Up\n");
3708 fprintf(stdout, "PNP: %d\n",(eeprom->is_not_pnp)?0:1);
3709 if (ftdi->type >= TYPE_2232C)
3710 fprintf(stdout,"Channel A has Mode %s%s%s\n",
3711 channel_mode[eeprom->channel_a_type],
3712 (eeprom->channel_a_driver)?" VCP":"",
3713 (eeprom->high_current_a)?" High Current IO":"");
3714 if (ftdi->type == TYPE_232H)
3716 fprintf(stdout,"FT1284 Mode Clock is idle %s, %s first, %sFlow Control\n",
3717 (eeprom->clock_polarity)?"HIGH":"LOW",
3718 (eeprom->data_order)?"LSB":"MSB",
3719 (eeprom->flow_control)?"":"No ");
3721 if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3722 fprintf(stdout,"Channel B has Mode %s%s%s\n",
3723 channel_mode[eeprom->channel_b_type],
3724 (eeprom->channel_b_driver)?" VCP":"",
3725 (eeprom->high_current_b)?" High Current IO":"");
3726 if (((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C)) &&
3727 eeprom->use_usb_version)
3728 fprintf(stdout,"Use explicit USB Version %04x\n",eeprom->usb_version);
3730 if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3732 fprintf(stdout,"%s has %d mA drive%s%s\n",
3733 (ftdi->type == TYPE_2232H)?"AL":"A",
3734 (eeprom->group0_drive+1) *4,
3735 (eeprom->group0_schmitt)?" Schmitt Input":"",
3736 (eeprom->group0_slew)?" Slow Slew":"");
3737 fprintf(stdout,"%s has %d mA drive%s%s\n",
3738 (ftdi->type == TYPE_2232H)?"AH":"B",
3739 (eeprom->group1_drive+1) *4,
3740 (eeprom->group1_schmitt)?" Schmitt Input":"",
3741 (eeprom->group1_slew)?" Slow Slew":"");
3742 fprintf(stdout,"%s has %d mA drive%s%s\n",
3743 (ftdi->type == TYPE_2232H)?"BL":"C",
3744 (eeprom->group2_drive+1) *4,
3745 (eeprom->group2_schmitt)?" Schmitt Input":"",
3746 (eeprom->group2_slew)?" Slow Slew":"");
3747 fprintf(stdout,"%s has %d mA drive%s%s\n",
3748 (ftdi->type == TYPE_2232H)?"BH":"D",
3749 (eeprom->group3_drive+1) *4,
3750 (eeprom->group3_schmitt)?" Schmitt Input":"",
3751 (eeprom->group3_slew)?" Slow Slew":"");
3753 else if (ftdi->type == TYPE_232H)
3755 const char *cbush_mux[] = {"TRISTATE","TXLED","RXLED", "TXRXLED","PWREN",
3756 "SLEEP","DRIVE_0","DRIVE_1","IOMODE","TXDEN",
3757 "CLK30","CLK15","CLK7_5"
3759 fprintf(stdout,"ACBUS has %d mA drive%s%s\n",
3760 (eeprom->group0_drive+1) *4,
3761 (eeprom->group0_schmitt)?" Schmitt Input":"",
3762 (eeprom->group0_slew)?" Slow Slew":"");
3763 fprintf(stdout,"ADBUS has %d mA drive%s%s\n",
3764 (eeprom->group1_drive+1) *4,
3765 (eeprom->group1_schmitt)?" Schmitt Input":"",
3766 (eeprom->group1_slew)?" Slow Slew":"");
3767 for (i=0; i<10; i++)
3769 if (eeprom->cbus_function[i]<= CBUSH_CLK7_5 )
3770 fprintf(stdout,"C%d Function: %s\n", i,
3771 cbush_mux[eeprom->cbus_function[i]]);
3774 else if (ftdi->type == TYPE_230X)
3776 const char *cbusx_mux[] = {"TRISTATE","TXLED","RXLED", "TXRXLED","PWREN",
3777 "SLEEP","DRIVE_0","DRIVE_1","IOMODE","TXDEN",
3778 "CLK24","CLK12","CLK6","BAT_DETECT","BAT_DETECT#",
3779 "I2C_TXE#", "I2C_RXF#", "VBUS_SENSE", "BB_WR#",
3780 "BBRD#", "TIME_STAMP", "AWAKE#",
3782 fprintf(stdout,"DBUS has %d mA drive%s%s\n",
3783 (eeprom->group0_drive+1) *4,
3784 (eeprom->group0_schmitt)?" Schmitt Input":"",
3785 (eeprom->group0_slew)?" Slow Slew":"");
3786 fprintf(stdout,"CBUS has %d mA drive%s%s\n",
3787 (eeprom->group1_drive+1) *4,
3788 (eeprom->group1_schmitt)?" Schmitt Input":"",
3789 (eeprom->group1_slew)?" Slow Slew":"");
3792 if (eeprom->cbus_function[i]<= CBUSX_AWAKE)
3793 fprintf(stdout,"CBUS%d Function: %s\n", i, cbusx_mux[eeprom->cbus_function[i]]);
3797 print_inverted_bits(eeprom->invert);
3800 if (ftdi->type == TYPE_R)
3802 const char *cbus_mux[] = {"TXDEN","PWREN","RXLED", "TXLED","TX+RXLED",
3803 "SLEEP","CLK48","CLK24","CLK12","CLK6",
3804 "IOMODE","BB_WR","BB_RD"
3806 const char *cbus_BB[] = {"RXF","TXE","RD", "WR"};
3809 print_inverted_bits(eeprom->invert);
3813 if (eeprom->cbus_function[i]<=CBUS_BB_RD)
3814 fprintf(stdout,"C%d Function: %s\n", i,
3815 cbus_mux[eeprom->cbus_function[i]]);
3819 /* Running MPROG show that C0..3 have fixed function Synchronous
3821 fprintf(stdout,"C%d BB Function: %s\n", i,
3824 fprintf(stdout, "Unknown CBUS mode. Might be special mode?\n");
3833 Get a value from the decoded EEPROM structure
3835 \param ftdi pointer to ftdi_context
3836 \param value_name Enum of the value to query
3837 \param value Pointer to store read value
3840 \retval -1: Value doesn't exist
3842 int ftdi_get_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int* value)
3847 *value = ftdi->eeprom->vendor_id;
3850 *value = ftdi->eeprom->product_id;
3852 case RELEASE_NUMBER:
3853 *value = ftdi->eeprom->release_number;
3856 *value = ftdi->eeprom->self_powered;
3859 *value = ftdi->eeprom->remote_wakeup;
3862 *value = ftdi->eeprom->is_not_pnp;
3865 *value = ftdi->eeprom->suspend_dbus7;
3867 case IN_IS_ISOCHRONOUS:
3868 *value = ftdi->eeprom->in_is_isochronous;
3870 case OUT_IS_ISOCHRONOUS:
3871 *value = ftdi->eeprom->out_is_isochronous;
3873 case SUSPEND_PULL_DOWNS:
3874 *value = ftdi->eeprom->suspend_pull_downs;
3877 *value = ftdi->eeprom->use_serial;
3880 *value = ftdi->eeprom->usb_version;
3882 case USE_USB_VERSION:
3883 *value = ftdi->eeprom->use_usb_version;
3886 *value = ftdi->eeprom->max_power;
3888 case CHANNEL_A_TYPE:
3889 *value = ftdi->eeprom->channel_a_type;
3891 case CHANNEL_B_TYPE:
3892 *value = ftdi->eeprom->channel_b_type;
3894 case CHANNEL_A_DRIVER:
3895 *value = ftdi->eeprom->channel_a_driver;
3897 case CHANNEL_B_DRIVER:
3898 *value = ftdi->eeprom->channel_b_driver;
3900 case CHANNEL_C_DRIVER:
3901 *value = ftdi->eeprom->channel_c_driver;
3903 case CHANNEL_D_DRIVER:
3904 *value = ftdi->eeprom->channel_d_driver;
3906 case CHANNEL_A_RS485:
3907 *value = ftdi->eeprom->channel_a_rs485enable;
3909 case CHANNEL_B_RS485:
3910 *value = ftdi->eeprom->channel_b_rs485enable;
3912 case CHANNEL_C_RS485:
3913 *value = ftdi->eeprom->channel_c_rs485enable;
3915 case CHANNEL_D_RS485:
3916 *value = ftdi->eeprom->channel_d_rs485enable;
3918 case CBUS_FUNCTION_0:
3919 *value = ftdi->eeprom->cbus_function[0];
3921 case CBUS_FUNCTION_1:
3922 *value = ftdi->eeprom->cbus_function[1];
3924 case CBUS_FUNCTION_2:
3925 *value = ftdi->eeprom->cbus_function[2];
3927 case CBUS_FUNCTION_3:
3928 *value = ftdi->eeprom->cbus_function[3];
3930 case CBUS_FUNCTION_4:
3931 *value = ftdi->eeprom->cbus_function[4];
3933 case CBUS_FUNCTION_5:
3934 *value = ftdi->eeprom->cbus_function[5];
3936 case CBUS_FUNCTION_6:
3937 *value = ftdi->eeprom->cbus_function[6];
3939 case CBUS_FUNCTION_7:
3940 *value = ftdi->eeprom->cbus_function[7];
3942 case CBUS_FUNCTION_8:
3943 *value = ftdi->eeprom->cbus_function[8];
3945 case CBUS_FUNCTION_9:
3946 *value = ftdi->eeprom->cbus_function[9];
3949 *value = ftdi->eeprom->high_current;
3951 case HIGH_CURRENT_A:
3952 *value = ftdi->eeprom->high_current_a;
3954 case HIGH_CURRENT_B:
3955 *value = ftdi->eeprom->high_current_b;
3958 *value = ftdi->eeprom->invert;
3961 *value = ftdi->eeprom->group0_drive;
3963 case GROUP0_SCHMITT:
3964 *value = ftdi->eeprom->group0_schmitt;
3967 *value = ftdi->eeprom->group0_slew;
3970 *value = ftdi->eeprom->group1_drive;
3972 case GROUP1_SCHMITT:
3973 *value = ftdi->eeprom->group1_schmitt;
3976 *value = ftdi->eeprom->group1_slew;
3979 *value = ftdi->eeprom->group2_drive;
3981 case GROUP2_SCHMITT:
3982 *value = ftdi->eeprom->group2_schmitt;
3985 *value = ftdi->eeprom->group2_slew;
3988 *value = ftdi->eeprom->group3_drive;
3990 case GROUP3_SCHMITT:
3991 *value = ftdi->eeprom->group3_schmitt;
3994 *value = ftdi->eeprom->group3_slew;
3997 *value = ftdi->eeprom->powersave;
3999 case CLOCK_POLARITY:
4000 *value = ftdi->eeprom->clock_polarity;
4003 *value = ftdi->eeprom->data_order;
4006 *value = ftdi->eeprom->flow_control;
4009 *value = ftdi->eeprom->chip;
4012 *value = ftdi->eeprom->size;
4014 case EXTERNAL_OSCILLATOR:
4015 *value = ftdi->eeprom->external_oscillator;
4018 ftdi_error_return(-1, "Request for unknown EEPROM value");
4024 Set a value in the decoded EEPROM Structure
4025 No parameter checking is performed
4027 \param ftdi pointer to ftdi_context
4028 \param value_name Enum of the value to set
4032 \retval -1: Value doesn't exist
4033 \retval -2: Value not user settable
4035 int ftdi_set_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int value)
4040 ftdi->eeprom->vendor_id = value;
4043 ftdi->eeprom->product_id = value;
4045 case RELEASE_NUMBER:
4046 ftdi->eeprom->release_number = value;
4049 ftdi->eeprom->self_powered = value;
4052 ftdi->eeprom->remote_wakeup = value;
4055 ftdi->eeprom->is_not_pnp = value;
4058 ftdi->eeprom->suspend_dbus7 = value;
4060 case IN_IS_ISOCHRONOUS:
4061 ftdi->eeprom->in_is_isochronous = value;
4063 case OUT_IS_ISOCHRONOUS:
4064 ftdi->eeprom->out_is_isochronous = value;
4066 case SUSPEND_PULL_DOWNS:
4067 ftdi->eeprom->suspend_pull_downs = value;
4070 ftdi->eeprom->use_serial = value;
4073 ftdi->eeprom->usb_version = value;
4075 case USE_USB_VERSION:
4076 ftdi->eeprom->use_usb_version = value;
4079 ftdi->eeprom->max_power = value;
4081 case CHANNEL_A_TYPE:
4082 ftdi->eeprom->channel_a_type = value;
4084 case CHANNEL_B_TYPE:
4085 ftdi->eeprom->channel_b_type = value;
4087 case CHANNEL_A_DRIVER:
4088 ftdi->eeprom->channel_a_driver = value;
4090 case CHANNEL_B_DRIVER:
4091 ftdi->eeprom->channel_b_driver = value;
4093 case CHANNEL_C_DRIVER:
4094 ftdi->eeprom->channel_c_driver = value;
4096 case CHANNEL_D_DRIVER:
4097 ftdi->eeprom->channel_d_driver = value;
4099 case CHANNEL_A_RS485:
4100 ftdi->eeprom->channel_a_rs485enable = value;
4102 case CHANNEL_B_RS485:
4103 ftdi->eeprom->channel_b_rs485enable = value;
4105 case CHANNEL_C_RS485:
4106 ftdi->eeprom->channel_c_rs485enable = value;
4108 case CHANNEL_D_RS485:
4109 ftdi->eeprom->channel_d_rs485enable = value;
4111 case CBUS_FUNCTION_0:
4112 ftdi->eeprom->cbus_function[0] = value;
4114 case CBUS_FUNCTION_1:
4115 ftdi->eeprom->cbus_function[1] = value;
4117 case CBUS_FUNCTION_2:
4118 ftdi->eeprom->cbus_function[2] = value;
4120 case CBUS_FUNCTION_3:
4121 ftdi->eeprom->cbus_function[3] = value;
4123 case CBUS_FUNCTION_4:
4124 ftdi->eeprom->cbus_function[4] = value;
4126 case CBUS_FUNCTION_5:
4127 ftdi->eeprom->cbus_function[5] = value;
4129 case CBUS_FUNCTION_6:
4130 ftdi->eeprom->cbus_function[6] = value;
4132 case CBUS_FUNCTION_7:
4133 ftdi->eeprom->cbus_function[7] = value;
4135 case CBUS_FUNCTION_8:
4136 ftdi->eeprom->cbus_function[8] = value;
4138 case CBUS_FUNCTION_9:
4139 ftdi->eeprom->cbus_function[9] = value;
4142 ftdi->eeprom->high_current = value;
4144 case HIGH_CURRENT_A:
4145 ftdi->eeprom->high_current_a = value;
4147 case HIGH_CURRENT_B:
4148 ftdi->eeprom->high_current_b = value;
4151 ftdi->eeprom->invert = value;
4154 ftdi->eeprom->group0_drive = value;
4156 case GROUP0_SCHMITT:
4157 ftdi->eeprom->group0_schmitt = value;
4160 ftdi->eeprom->group0_slew = value;
4163 ftdi->eeprom->group1_drive = value;
4165 case GROUP1_SCHMITT:
4166 ftdi->eeprom->group1_schmitt = value;
4169 ftdi->eeprom->group1_slew = value;
4172 ftdi->eeprom->group2_drive = value;
4174 case GROUP2_SCHMITT:
4175 ftdi->eeprom->group2_schmitt = value;
4178 ftdi->eeprom->group2_slew = value;
4181 ftdi->eeprom->group3_drive = value;
4183 case GROUP3_SCHMITT:
4184 ftdi->eeprom->group3_schmitt = value;
4187 ftdi->eeprom->group3_slew = value;
4190 ftdi->eeprom->chip = value;
4193 ftdi->eeprom->powersave = value;
4195 case CLOCK_POLARITY:
4196 ftdi->eeprom->clock_polarity = value;
4199 ftdi->eeprom->data_order = value;
4202 ftdi->eeprom->flow_control = value;
4205 ftdi_error_return(-2, "EEPROM Value can't be changed");
4207 case EXTERNAL_OSCILLATOR:
4208 ftdi->eeprom->external_oscillator = value;
4210 case USER_DATA_ADDR:
4211 ftdi->eeprom->user_data_addr = value;
4215 ftdi_error_return(-1, "Request to unknown EEPROM value");
4217 ftdi->eeprom->initialized_for_connected_device = 0;
4221 /** Get the read-only buffer to the binary EEPROM content
4223 \param ftdi pointer to ftdi_context
4224 \param buf buffer to receive EEPROM content
4225 \param size Size of receiving buffer
4228 \retval -1: struct ftdi_contxt or ftdi_eeprom missing
4229 \retval -2: Not enough room to store eeprom
4231 int ftdi_get_eeprom_buf(struct ftdi_context *ftdi, unsigned char * buf, int size)
4233 if (!ftdi || !(ftdi->eeprom))
4234 ftdi_error_return(-1, "No appropriate structure");
4236 if (!buf || size < ftdi->eeprom->size)
4237 ftdi_error_return(-1, "Not enough room to store eeprom");
4239 // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
4240 if (size > FTDI_MAX_EEPROM_SIZE)
4241 size = FTDI_MAX_EEPROM_SIZE;
4243 memcpy(buf, ftdi->eeprom->buf, size);
4248 /** Set the EEPROM content from the user-supplied prefilled buffer
4250 \param ftdi pointer to ftdi_context
4251 \param buf buffer to read EEPROM content
4252 \param size Size of buffer
4255 \retval -1: struct ftdi_context or ftdi_eeprom or buf missing
4257 int ftdi_set_eeprom_buf(struct ftdi_context *ftdi, const unsigned char * buf, int size)
4259 if (!ftdi || !(ftdi->eeprom) || !buf)
4260 ftdi_error_return(-1, "No appropriate structure");
4262 // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
4263 if (size > FTDI_MAX_EEPROM_SIZE)
4264 size = FTDI_MAX_EEPROM_SIZE;
4266 memcpy(ftdi->eeprom->buf, buf, size);
4271 /** Set the EEPROM user data content from the user-supplied prefilled buffer
4273 \param ftdi pointer to ftdi_context
4274 \param buf buffer to read EEPROM user data content
4275 \param size Size of buffer
4278 \retval -1: struct ftdi_context or ftdi_eeprom or buf missing
4280 int ftdi_set_eeprom_user_data(struct ftdi_context *ftdi, const char * buf, int size)
4282 if (!ftdi || !(ftdi->eeprom) || !buf)
4283 ftdi_error_return(-1, "No appropriate structure");
4285 ftdi->eeprom->user_data_size = size;
4286 ftdi->eeprom->user_data = buf;
4291 Read eeprom location
4293 \param ftdi pointer to ftdi_context
4294 \param eeprom_addr Address of eeprom location to be read
4295 \param eeprom_val Pointer to store read eeprom location
4298 \retval -1: read failed
4299 \retval -2: USB device unavailable
4301 int ftdi_read_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short *eeprom_val)
4303 unsigned char buf[2];
4305 if (ftdi == NULL || ftdi->usb_dev == NULL)
4306 ftdi_error_return(-2, "USB device unavailable");
4308 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, eeprom_addr, buf, 2, ftdi->usb_read_timeout) != 2)
4309 ftdi_error_return(-1, "reading eeprom failed");
4311 *eeprom_val = (0xff & buf[0]) | (buf[1] << 8);
4319 \param ftdi pointer to ftdi_context
4322 \retval -1: read failed
4323 \retval -2: USB device unavailable
4325 int ftdi_read_eeprom(struct ftdi_context *ftdi)
4330 if (ftdi == NULL || ftdi->usb_dev == NULL)
4331 ftdi_error_return(-2, "USB device unavailable");
4332 buf = ftdi->eeprom->buf;
4334 for (i = 0; i < FTDI_MAX_EEPROM_SIZE/2; i++)
4336 if (libusb_control_transfer(
4337 ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE,SIO_READ_EEPROM_REQUEST, 0, i,
4338 buf+(i*2), 2, ftdi->usb_read_timeout) != 2)
4339 ftdi_error_return(-1, "reading eeprom failed");
4342 if (ftdi->type == TYPE_R)
4343 ftdi->eeprom->size = 0x80;
4344 /* Guesses size of eeprom by comparing halves
4345 - will not work with blank eeprom */
4346 else if (strrchr((const char *)buf, 0xff) == ((const char *)buf +FTDI_MAX_EEPROM_SIZE -1))
4347 ftdi->eeprom->size = -1;
4348 else if (memcmp(buf,&buf[0x80],0x80) == 0)
4349 ftdi->eeprom->size = 0x80;
4350 else if (memcmp(buf,&buf[0x40],0x40) == 0)
4351 ftdi->eeprom->size = 0x40;
4353 ftdi->eeprom->size = 0x100;
4358 ftdi_read_chipid_shift does the bitshift operation needed for the FTDIChip-ID
4359 Function is only used internally
4362 static unsigned char ftdi_read_chipid_shift(unsigned char value)
4364 return ((value & 1) << 1) |
4365 ((value & 2) << 5) |
4366 ((value & 4) >> 2) |
4367 ((value & 8) << 4) |
4368 ((value & 16) >> 1) |
4369 ((value & 32) >> 1) |
4370 ((value & 64) >> 4) |
4371 ((value & 128) >> 2);
4375 Read the FTDIChip-ID from R-type devices
4377 \param ftdi pointer to ftdi_context
4378 \param chipid Pointer to store FTDIChip-ID
4381 \retval -1: read failed
4382 \retval -2: USB device unavailable
4384 int ftdi_read_chipid(struct ftdi_context *ftdi, unsigned int *chipid)
4386 unsigned int a = 0, b = 0;
4388 if (ftdi == NULL || ftdi->usb_dev == NULL)
4389 ftdi_error_return(-2, "USB device unavailable");
4391 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x43, (unsigned char *)&a, 2, ftdi->usb_read_timeout) == 2)
4393 a = a << 8 | a >> 8;
4394 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x44, (unsigned char *)&b, 2, ftdi->usb_read_timeout) == 2)
4396 b = b << 8 | b >> 8;
4397 a = (a << 16) | (b & 0xFFFF);
4398 a = ftdi_read_chipid_shift(a) | ftdi_read_chipid_shift(a>>8)<<8
4399 | ftdi_read_chipid_shift(a>>16)<<16 | ftdi_read_chipid_shift(a>>24)<<24;
4400 *chipid = a ^ 0xa5f0f7d1;
4405 ftdi_error_return(-1, "read of FTDIChip-ID failed");
4409 Write eeprom location
4411 \param ftdi pointer to ftdi_context
4412 \param eeprom_addr Address of eeprom location to be written
4413 \param eeprom_val Value to be written
4416 \retval -1: write failed
4417 \retval -2: USB device unavailable
4418 \retval -3: Invalid access to checksum protected area below 0x80
4419 \retval -4: Device can't access unprotected area
4420 \retval -5: Reading chip type failed
4422 int ftdi_write_eeprom_location(struct ftdi_context *ftdi, int eeprom_addr,
4423 unsigned short eeprom_val)
4425 int chip_type_location;
4426 unsigned short chip_type;
4428 if (ftdi == NULL || ftdi->usb_dev == NULL)
4429 ftdi_error_return(-2, "USB device unavailable");
4431 if (eeprom_addr <0x80)
4432 ftdi_error_return(-2, "Invalid access to checksum protected area below 0x80");
4439 chip_type_location = 0x14;
4443 chip_type_location = 0x18;
4446 chip_type_location = 0x1e;
4449 ftdi_error_return(-4, "Device can't access unprotected area");
4452 if (ftdi_read_eeprom_location( ftdi, chip_type_location>>1, &chip_type))
4453 ftdi_error_return(-5, "Reading failed");
4454 fprintf(stderr," loc 0x%04x val 0x%04x\n", chip_type_location,chip_type);
4455 if ((chip_type & 0xff) != 0x66)
4457 ftdi_error_return(-6, "EEPROM is not of 93x66");
4460 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4461 SIO_WRITE_EEPROM_REQUEST, eeprom_val, eeprom_addr,
4462 NULL, 0, ftdi->usb_write_timeout) != 0)
4463 ftdi_error_return(-1, "unable to write eeprom");
4471 \param ftdi pointer to ftdi_context
4474 \retval -1: read failed
4475 \retval -2: USB device unavailable
4476 \retval -3: EEPROM not initialized for the connected device;
4478 int ftdi_write_eeprom(struct ftdi_context *ftdi)
4480 unsigned short usb_val, status;
4482 unsigned char *eeprom;
4484 if (ftdi == NULL || ftdi->usb_dev == NULL)
4485 ftdi_error_return(-2, "USB device unavailable");
4487 if(ftdi->eeprom->initialized_for_connected_device == 0)
4488 ftdi_error_return(-3, "EEPROM not initialized for the connected device");
4490 eeprom = ftdi->eeprom->buf;
4492 /* These commands were traced while running MProg */
4493 if ((ret = ftdi_usb_reset(ftdi)) != 0)
4495 if ((ret = ftdi_poll_modem_status(ftdi, &status)) != 0)
4497 if ((ret = ftdi_set_latency_timer(ftdi, 0x77)) != 0)
4500 for (i = 0; i < ftdi->eeprom->size/2; i++)
4502 /* Do not try to write to reserved area */
4503 if ((ftdi->type == TYPE_230X) && (i == 0x40))
4507 usb_val = eeprom[i*2];
4508 usb_val += eeprom[(i*2)+1] << 8;
4509 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4510 SIO_WRITE_EEPROM_REQUEST, usb_val, i,
4511 NULL, 0, ftdi->usb_write_timeout) < 0)
4512 ftdi_error_return(-1, "unable to write eeprom");
4521 This is not supported on FT232R/FT245R according to the MProg manual from FTDI.
4523 \param ftdi pointer to ftdi_context
4526 \retval -1: erase failed
4527 \retval -2: USB device unavailable
4528 \retval -3: Writing magic failed
4529 \retval -4: Read EEPROM failed
4530 \retval -5: Unexpected EEPROM value
4532 #define MAGIC 0x55aa
4533 int ftdi_erase_eeprom(struct ftdi_context *ftdi)
4535 unsigned short eeprom_value;
4536 if (ftdi == NULL || ftdi->usb_dev == NULL)
4537 ftdi_error_return(-2, "USB device unavailable");
4539 if ((ftdi->type == TYPE_R) || (ftdi->type == TYPE_230X))
4541 ftdi->eeprom->chip = 0;
4545 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
4546 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
4547 ftdi_error_return(-1, "unable to erase eeprom");
4550 /* detect chip type by writing 0x55AA as magic at word position 0xc0
4551 Chip is 93x46 if magic is read at word position 0x00, as wraparound happens around 0x40
4552 Chip is 93x56 if magic is read at word position 0x40, as wraparound happens around 0x80
4553 Chip is 93x66 if magic is only read at word position 0xc0*/
4554 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4555 SIO_WRITE_EEPROM_REQUEST, MAGIC, 0xc0,
4556 NULL, 0, ftdi->usb_write_timeout) != 0)
4557 ftdi_error_return(-3, "Writing magic failed");
4558 if (ftdi_read_eeprom_location( ftdi, 0x00, &eeprom_value))
4559 ftdi_error_return(-4, "Reading failed");
4560 if (eeprom_value == MAGIC)
4562 ftdi->eeprom->chip = 0x46;
4566 if (ftdi_read_eeprom_location( ftdi, 0x40, &eeprom_value))
4567 ftdi_error_return(-4, "Reading failed");
4568 if (eeprom_value == MAGIC)
4569 ftdi->eeprom->chip = 0x56;
4572 if (ftdi_read_eeprom_location( ftdi, 0xc0, &eeprom_value))
4573 ftdi_error_return(-4, "Reading failed");
4574 if (eeprom_value == MAGIC)
4575 ftdi->eeprom->chip = 0x66;
4578 ftdi->eeprom->chip = -1;
4582 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
4583 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
4584 ftdi_error_return(-1, "unable to erase eeprom");
4589 Get string representation for last error code
4591 \param ftdi pointer to ftdi_context
4593 \retval Pointer to error string
4595 const char *ftdi_get_error_string (struct ftdi_context *ftdi)
4600 return ftdi->error_str;
4603 /* @} end of doxygen libftdi group */