{
libusb_close (ftdi->usb_dev);
ftdi->usb_dev = NULL;
+ if(ftdi->eeprom)
+ ftdi->eeprom->initialized_for_connected_device = 0;
}
}
if (libusb_get_device_descriptor(dev, &desc) < 0)
ftdi_error_return_free_device_list(-6, "libusb_get_device_descriptor() failed", devs);
- if ((vendor != 0 && product != 0 && desc.idVendor == vendor && desc.idProduct == product) ||
- ((desc.idVendor == 0x403) && (desc.idProduct == 0x6001 || desc.idProduct == 0x6010
+ if (((vendor != 0 && product != 0) &&
+ desc.idVendor == vendor && desc.idProduct == product) ||
+ ((vendor == 0 && product == 0) &&
+ (desc.idVendor == 0x403) && (desc.idProduct == 0x6001 || desc.idProduct == 0x6010
|| desc.idProduct == 0x6011 || desc.idProduct == 0x6014)))
{
*curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
return rtn;
}
-/**
- ftdi_convert_baudrate returns nearest supported baud rate to that requested.
+/* ftdi_to_clkbits_AM For the AM device, convert a requested baudrate
+ to encoded divisor and the achievable baudrate
Function is only used internally
\internal
+
+ See AN120
+ clk/1 -> 0
+ clk/1.5 -> 1
+ clk/2 -> 2
+ From /2, 0.125/ 0.25 and 0.5 steps may be taken
+ The fractional part has frac_code encoding
*/
-static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
- unsigned short *value, unsigned short *index)
+static int ftdi_to_clkbits_AM(int baudrate, unsigned long *encoded_divisor)
+
{
+ static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
- static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
int divisor, best_divisor, best_baud, best_baud_diff;
- unsigned long encoded_divisor;
- int i;
-
- if (baudrate <= 0)
- {
- // Return error
- return -1;
- }
-
divisor = 24000000 / baudrate;
+ int i;
- if (ftdi->type == TYPE_AM)
- {
- // Round down to supported fraction (AM only)
- divisor -= am_adjust_dn[divisor & 7];
- }
+ // Round down to supported fraction (AM only)
+ divisor -= am_adjust_dn[divisor & 7];
// Try this divisor and the one above it (because division rounds down)
best_divisor = 0;
// Round up to minimum supported divisor
try_divisor = 8;
}
- else if (ftdi->type != TYPE_AM && try_divisor < 12)
- {
- // BM doesn't support divisors 9 through 11 inclusive
- try_divisor = 12;
- }
else if (divisor < 16)
{
// AM doesn't support divisors 9 through 15 inclusive
}
else
{
- if (ftdi->type == TYPE_AM)
+ // Round up to supported fraction (AM only)
+ try_divisor += am_adjust_up[try_divisor & 7];
+ if (try_divisor > 0x1FFF8)
{
- // Round up to supported fraction (AM only)
- try_divisor += am_adjust_up[try_divisor & 7];
- if (try_divisor > 0x1FFF8)
- {
- // Round down to maximum supported divisor value (for AM)
- try_divisor = 0x1FFF8;
- }
- }
- else
- {
- if (try_divisor > 0x1FFFF)
- {
- // Round down to maximum supported divisor value (for BM)
- try_divisor = 0x1FFFF;
- }
+ // Round down to maximum supported divisor value (for AM)
+ try_divisor = 0x1FFF8;
}
}
// Get estimated baud rate (to nearest integer)
}
}
// Encode the best divisor value
- encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
+ *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
// Deal with special cases for encoded value
- if (encoded_divisor == 1)
+ if (*encoded_divisor == 1)
+ {
+ *encoded_divisor = 0; // 3000000 baud
+ }
+ else if (*encoded_divisor == 0x4001)
+ {
+ *encoded_divisor = 1; // 2000000 baud (BM only)
+ }
+ return best_baud;
+}
+
+/* ftdi_to_clkbits Convert a requested baudrate for a given system clock and predivisor
+ to encoded divisor and the achievable baudrate
+ Function is only used internally
+ \internal
+
+ See AN120
+ clk/1 -> 0
+ clk/1.5 -> 1
+ clk/2 -> 2
+ From /2, 0.125 steps may be taken.
+ The fractional part has frac_code encoding
+
+ value[13:0] of value is the divisor
+ index[9] mean 12 MHz Base(120 MHz/10) rate versus 3 MHz (48 MHz/16) else
+
+ H Type have all features above with
+ {index[8],value[15:14]} is the encoded subdivisor
+
+ FT232R, FT2232 and FT232BM have no option for 12 MHz and with
+ {index[0],value[15:14]} is the encoded subdivisor
+
+ AM Type chips have only four fractional subdivisors at value[15:14]
+ for subdivisors 0, 0.5, 0.25, 0.125
+*/
+static int ftdi_to_clkbits(int baudrate, unsigned int clk, int clk_div, unsigned long *encoded_divisor)
+{
+ static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
+ int best_baud = 0;
+ int divisor, best_divisor;
+ if (baudrate >= clk/clk_div)
+ {
+ *encoded_divisor = 0;
+ best_baud = clk/clk_div;
+ }
+ else if (baudrate >= clk/(clk_div + clk_div/2))
+ {
+ *encoded_divisor = 1;
+ best_baud = clk/(clk_div + clk_div/2);
+ }
+ else if (baudrate >= clk/(2*clk_div))
+ {
+ *encoded_divisor = 2;
+ best_baud = clk/(2*clk_div);
+ }
+ else
+ {
+ /* We divide by 16 to have 3 fractional bits and one bit for rounding */
+ divisor = clk*16/clk_div / baudrate;
+ if (divisor & 1) /* Decide if to round up or down*/
+ best_divisor = divisor /2 +1;
+ else
+ best_divisor = divisor/2;
+ if(best_divisor > 0x20000)
+ best_divisor = 0x1ffff;
+ best_baud = clk*8/clk_div/best_divisor;
+ *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 0x7] << 14);
+ }
+ return best_baud;
+}
+/**
+ ftdi_convert_baudrate returns nearest supported baud rate to that requested.
+ Function is only used internally
+ \internal
+*/
+static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
+ unsigned short *value, unsigned short *index)
+{
+ int best_baud;
+ unsigned long encoded_divisor;
+
+ if (baudrate <= 0)
{
- encoded_divisor = 0; // 3000000 baud
+ // Return error
+ return -1;
}
- else if (encoded_divisor == 0x4001)
+
+#define H_CLK 120000000
+#define C_CLK 48000000
+ if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H) || (ftdi->type == TYPE_232H ))
{
- encoded_divisor = 1; // 2000000 baud (BM only)
+ if(baudrate*10 > H_CLK /0x3fff)
+ {
+ /* On H Devices, use 12 000 000 Baudrate when possible
+ We have a 14 bit divisor, a 1 bit divisor switch (10 or 16)
+ three fractional bits and a 120 MHz clock
+ Assume AN_120 "Sub-integer divisors between 0 and 2 are not allowed" holds for
+ DIV/10 CLK too, so /1, /1.5 and /2 can be handled the same*/
+ best_baud = ftdi_to_clkbits(baudrate, H_CLK, 10, &encoded_divisor);
+ encoded_divisor |= 0x20000; /* switch on CLK/10*/
+ }
+ else
+ best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
+ }
+ else if ((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C) || (ftdi->type == TYPE_R ))
+ {
+ best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
+ }
+ else
+ {
+ best_baud = ftdi_to_clkbits_AM(baudrate, &encoded_divisor);
}
// Split into "value" and "index" values
*value = (unsigned short)(encoded_divisor & 0xFFFF);
- if (ftdi->type == TYPE_2232C || ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H)
+ if (ftdi->type == TYPE_2232C || ftdi->type == TYPE_2232H ||
+ ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H )
{
*index = (unsigned short)(encoded_divisor >> 8);
*index &= 0xFF00;
}
/**
+ * @brief Wrapper function to export ftdi_convert_baudrate() to the unit test
+ * Do not use, it's only for the unit test framework
+ **/
+int convert_baudrate_UT_export(int baudrate, struct ftdi_context *ftdi,
+ unsigned short *value, unsigned short *index)
+{
+ return ftdi_convert_baudrate(baudrate, ftdi, value, index);
+}
+
+/**
Sets the chip baud rate
\param ftdi pointer to ftdi_context
}
/**
- Init eeprom with default values.
+ Init eeprom with default values for the connected device
\param ftdi pointer to ftdi_context
\param manufacturer String to use as Manufacturer
\param product String to use as Product description
\retval 0: all fine
\retval -1: No struct ftdi_context
\retval -2: No struct ftdi_eeprom
+ \retval -3: No connected device or device not yet opened
*/
int ftdi_eeprom_initdefaults(struct ftdi_context *ftdi, char * manufacturer,
char * product, char * serial)
eeprom = ftdi->eeprom;
memset(eeprom, 0, sizeof(struct ftdi_eeprom));
+ if (ftdi->usb_dev == NULL)
+ ftdi_error_return(-3, "No connected device or device not yet opened");
+
eeprom->vendor_id = 0x0403;
- eeprom->use_serial = USE_SERIAL_NUM;
+ eeprom->use_serial = 1;
if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM) ||
(ftdi->type == TYPE_R))
eeprom->product_id = 0x6001;
if (eeprom->product)
strcpy(eeprom->product, product);
}
+ else
+ {
+ const char* default_product;
+ switch(ftdi->type)
+ {
+ case TYPE_AM: default_product = "AM"; break;
+ case TYPE_BM: default_product = "BM"; break;
+ case TYPE_2232C: default_product = "Dual RS232"; break;
+ case TYPE_R: default_product = "FT232R USB UART"; break;
+ case TYPE_2232H: default_product = "Dual RS232-HS"; break;
+ case TYPE_4232H: default_product = "FT4232H"; break;
+ case TYPE_232H: default_product = "Single-RS232-HS"; break;
+ default:
+ ftdi_error_return(-3, "Unknown chip type");
+ }
+ eeprom->product = malloc(strlen(default_product) +1);
+ if (eeprom->product)
+ strcpy(eeprom->product, default_product);
+ }
if (eeprom->serial)
free (eeprom->serial);
}
eeprom->size = -1;
}
+ eeprom->initialized_for_connected_device = 1;
return 0;
}
/*FTD2XX doesn't check for values not fitting in the ACBUS Signal oprtions*/
output[0x18+i] = mode_high <<4 | mode_low;
}
}
+/* Return the bits for the encoded EEPROM Structure of a requested Mode
+ *
+ */
+static unsigned char type2bit(unsigned char type, enum ftdi_chip_type chip)
+{
+ switch (chip)
+ {
+ case TYPE_2232H:
+ case TYPE_2232C:
+ {
+ switch (type)
+ {
+ case CHANNEL_IS_UART: return 0;
+ case CHANNEL_IS_FIFO: return 0x01;
+ case CHANNEL_IS_OPTO: return 0x02;
+ case CHANNEL_IS_CPU : return 0x04;
+ default: return 0;
+ }
+ }
+ case TYPE_232H:
+ {
+ switch (type)
+ {
+ case CHANNEL_IS_UART : return 0;
+ case CHANNEL_IS_FIFO : return 0x01;
+ case CHANNEL_IS_OPTO : return 0x02;
+ case CHANNEL_IS_CPU : return 0x04;
+ case CHANNEL_IS_FT1284 : return 0x08;
+ default: return 0;
+ }
+ }
+ default: return 0;
+ }
+ return 0;
+}
+
/**
Build binary buffer from ftdi_eeprom structure.
Output is suitable for ftdi_write_eeprom().
case TYPE_4232H:
user_area_size = 86;
break;
+ case TYPE_232H:
+ user_area_size = 80;
+ break;
default:
user_area_size = 0;
break;
if (ftdi->type > TYPE_AM) /* use_serial not used in AM devices */
{
- if (eeprom->use_serial == USE_SERIAL_NUM )
+ if (eeprom->use_serial)
output[0x0A] |= USE_SERIAL_NUM;
else
output[0x0A] &= ~USE_SERIAL_NUM;
break;
case TYPE_2232C:
- output[0x00] = (eeprom->channel_a_type)?((1<<(eeprom->channel_a_type)) & 0x7):0;
+ output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232C);
if ( eeprom->channel_a_driver == DRIVER_VCP)
output[0x00] |= DRIVER_VCP;
else
else
output[0x00] &= ~HIGH_CURRENT_DRIVE;
- output[0x01] = (eeprom->channel_b_type)?((1<<(eeprom->channel_b_type)) & 0x7):0;
+ output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232C);
if ( eeprom->channel_b_driver == DRIVER_VCP)
output[0x01] |= DRIVER_VCP;
else
output[0x16] = eeprom->cbus_function[4];
break;
case TYPE_2232H:
- output[0x00] = (eeprom->channel_a_type)?((1<<(eeprom->channel_a_type)) & 0x7):0;
+ output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232H);
if ( eeprom->channel_a_driver == DRIVER_VCP)
output[0x00] |= DRIVER_VCP;
else
output[0x00] &= ~DRIVER_VCP;
- output[0x01] = (eeprom->channel_b_type)?((1<<(eeprom->channel_b_type)) & 0x7):0;
+ output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232H);
if ( eeprom->channel_b_driver == DRIVER_VCP)
output[0x01] |= DRIVER_VCP;
else
fprintf(stderr,"FIXME: Build FT4232H specific EEPROM settings\n");
break;
case TYPE_232H:
- output[0x00] = (eeprom->channel_a_type)?((1<<(eeprom->channel_a_type)) & 0xf):0;
+ output[0x00] = type2bit(eeprom->channel_a_type, TYPE_232H);
if ( eeprom->channel_a_driver == DRIVER_VCP)
output[0x00] |= DRIVER_VCPH;
else
return user_area_size;
}
-/* FTD2XX doesn't allow to set multiple bits in the interface mode bitfield*/
-unsigned char bit2type(unsigned char bits)
+/* Decode the encoded EEPROM field for the FTDI Mode into a value for the abstracted
+ * EEPROM structure
+ *
+ * FTD2XX doesn't allow to set multiple bits in the interface mode bitfield, and so do we
+ */
+static unsigned char bit2type(unsigned char bits)
{
switch (bits)
{
- case 0: return 0;
- case 1: return 1;
- case 2: return 2;
- case 4: return 3;
- case 8: return 4;
+ case 0: return CHANNEL_IS_UART;
+ case 1: return CHANNEL_IS_FIFO;
+ case 2: return CHANNEL_IS_OPTO;
+ case 4: return CHANNEL_IS_CPU;
+ case 8: return CHANNEL_IS_FT1284;
default:
fprintf(stderr," Unexpected value %d for Hardware Interface type\n",
bits);
}
return 0;
}
-
/**
Decode binary EEPROM image into an ftdi_eeprom structure.
eeprom->in_is_isochronous = buf[0x0A]&0x01;
eeprom->out_is_isochronous = buf[0x0A]&0x02;
eeprom->suspend_pull_downs = buf[0x0A]&0x04;
- eeprom->use_serial = buf[0x0A] & USE_SERIAL_NUM;
+ eeprom->use_serial = (buf[0x0A] & USE_SERIAL_NUM)?1:0;
eeprom->use_usb_version = buf[0x0A] & USE_USB_VERSION_BIT;
// Addr 0C: USB version low byte when 0x0A
{
eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
- eeprom->channel_b_type = buf[0x01] & 0x7;
+ eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
if (ftdi->type == TYPE_2232H)
if (verbose)
{
- char *channel_mode[] = {"UART","245","CPU", "OPTO", "FT1284"};
+ char *channel_mode[] = {"UART", "FIFO", "CPU", "OPTO", "FT1284"};
fprintf(stdout, "VID: 0x%04x\n",eeprom->vendor_id);
fprintf(stdout, "PID: 0x%04x\n",eeprom->product_id);
fprintf(stdout, "Release: 0x%04x\n",release);
case IN_IS_ISOCHRONOUS:
*value = ftdi->eeprom->in_is_isochronous;
break;
+ case OUT_IS_ISOCHRONOUS:
+ *value = ftdi->eeprom->out_is_isochronous;
+ break;
case SUSPEND_PULL_DOWNS:
*value = ftdi->eeprom->suspend_pull_downs;
break;
case USB_VERSION:
*value = ftdi->eeprom->usb_version;
break;
+ case USE_USB_VERSION:
+ *value = ftdi->eeprom->use_usb_version;
+ break;
case MAX_POWER:
*value = ftdi->eeprom->max_power;
break;
case IN_IS_ISOCHRONOUS:
ftdi->eeprom->in_is_isochronous = value;
break;
+ case OUT_IS_ISOCHRONOUS:
+ ftdi->eeprom->out_is_isochronous = value;
+ break;
case SUSPEND_PULL_DOWNS:
ftdi->eeprom->suspend_pull_downs = value;
break;
case USB_VERSION:
ftdi->eeprom->usb_version = value;
break;
+ case USE_USB_VERSION:
+ ftdi->eeprom->use_usb_version = value;
+ break;
case MAX_POWER:
ftdi->eeprom->max_power = value;
break;
return 0;
}
+/** Set the EEPROM content from the user-supplied prefilled buffer
+
+ \param ftdi pointer to ftdi_context
+ \param buf buffer to read EEPROM content
+ \param size Size of buffer
+
+ \retval 0: All fine
+ \retval -1: struct ftdi_contxt or ftdi_eeprom of buf missing
+*/
+int ftdi_set_eeprom_buf(struct ftdi_context *ftdi, const unsigned char * buf, int size)
+{
+ if (!ftdi || !(ftdi->eeprom) || !buf)
+ ftdi_error_return(-1, "No appropriate structure");
+
+ // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
+ if (size > FTDI_MAX_EEPROM_SIZE)
+ size = FTDI_MAX_EEPROM_SIZE;
+
+ memcpy(ftdi->eeprom->buf, buf, size);
+
+ return 0;
+}
+
/**
Read eeprom location
\retval 0: all fine
\retval -1: read failed
\retval -2: USB device unavailable
+ \retval -3: EEPROM not initialized for the connected device;
*/
int ftdi_write_eeprom(struct ftdi_context *ftdi)
{
if (ftdi == NULL || ftdi->usb_dev == NULL)
ftdi_error_return(-2, "USB device unavailable");
+
+ if(ftdi->eeprom->initialized_for_connected_device == 0)
+ ftdi_error_return(-3, "EEPROM not initialized for the connected device");
+
eeprom = ftdi->eeprom->buf;
/* These commands were traced while running MProg */
git://developer.intra2net.com / libftdi / blobdiff