#include <stdio.h>
#include <stdlib.h>
+#include "ftdi_i.h"
#include "ftdi.h"
+#include "ftdi_version_i.h"
#define ftdi_error_return(code, str) do { \
ftdi->error_str = str; \
\retval 0: all fine
\retval -1: unknown interface
\retval -2: USB device unavailable
+ \retval -3: Device already open, interface can't be set in that state
*/
int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface)
{
if (ftdi == NULL)
ftdi_error_return(-2, "USB device unavailable");
+ if (ftdi->usb_dev != NULL)
+ {
+ int check_interface = interface;
+ if (check_interface == INTERFACE_ANY)
+ check_interface = INTERFACE_A;
+
+ if (ftdi->index != check_interface)
+ ftdi_error_return(-3, "Interface can not be changed on an already open device");
+ }
+
switch (interface)
{
case INTERFACE_ANY:
ftdi->usb_dev = usb;
}
+/**
+ * @brief Get libftdi library version
+ *
+ * @return ftdi_version_info Library version information
+ **/
+struct ftdi_version_info ftdi_get_library_version()
+{
+ struct ftdi_version_info ver;
+
+ ver.major = FTDI_MAJOR_VERSION;
+ ver.minor = FTDI_MINOR_VERSION;
+ ver.micro = FTDI_MICRO_VERSION;
+ ver.version_str = FTDI_VERSION_STRING;
+ ver.snapshot_str = FTDI_SNAPSHOT_VERSION;
+
+ return ver;
+}
/**
Finds all ftdi devices with given VID:PID on the usb bus. Creates a new
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
+ *encoded_divisor = 0; // 3000000 baud
}
- else if (encoded_divisor == 0x4001)
+ else if (*encoded_divisor == 0x4001)
{
- encoded_divisor = 1; // 2000000 baud (BM only)
+ *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*16/clk_div/best_divisor;
+ if (best_baud & 1) /* Decide if to round up or down*/
+ best_baud = best_baud /2 +1;
+ else
+ best_baud = best_baud /2;
+ *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)
+ {
+ // Return error
+ return -1;
+ }
+
+#define H_CLK 120000000
+#define C_CLK 48000000
+ if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H) || (ftdi->type == TYPE_232H ))
+ {
+ 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 || ftdi->type == TYPE_232H )
+ if (ftdi->type == TYPE_2232H ||
+ ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H )
{
*index = (unsigned short)(encoded_divisor >> 8);
*index &= 0xFF00;
return 0;
}
-
/**
- Enable bitbang mode.
-
- \deprecated use \ref ftdi_set_bitmode with mode BITMODE_BITBANG instead
+ Enable/disable bitbang modes.
\param ftdi pointer to ftdi_context
\param bitmask Bitmask to configure lines.
HIGH/ON value configures a line as output.
+ \param mode Bitbang mode: use the values defined in \ref ftdi_mpsse_mode
\retval 0: all fine
\retval -1: can't enable bitbang mode
\retval -2: USB device unavailable
*/
-int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask)
+int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
{
unsigned short usb_val;
ftdi_error_return(-2, "USB device unavailable");
usb_val = bitmask; // low byte: bitmask
- /* FT2232C: Set bitbang_mode to 2 to enable SPI */
- usb_val |= (ftdi->bitbang_mode << 8);
-
- 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)
- ftdi_error_return(-1, "unable to enter bitbang mode. Perhaps not a BM type chip?");
+ usb_val |= (mode << 8);
+ 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)
+ ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a BM/2232C type chip?");
- ftdi->bitbang_enabled = 1;
+ ftdi->bitbang_mode = mode;
+ ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
return 0;
}
return 0;
}
-/**
- Enable/disable bitbang modes.
-
- \param ftdi pointer to ftdi_context
- \param bitmask Bitmask to configure lines.
- HIGH/ON value configures a line as output.
- \param mode Bitbang mode: use the values defined in \ref ftdi_mpsse_mode
-
- \retval 0: all fine
- \retval -1: can't enable bitbang mode
- \retval -2: USB device unavailable
-*/
-int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
-{
- unsigned short usb_val;
-
- if (ftdi == NULL || ftdi->usb_dev == NULL)
- ftdi_error_return(-2, "USB device unavailable");
-
- usb_val = bitmask; // low byte: bitmask
- usb_val |= (mode << 8);
- 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)
- ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a 2232C type chip?");
-
- ftdi->bitbang_mode = mode;
- ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
- return 0;
-}
/**
Directly read pin state, circumventing the read buffer. Useful for bitbang mode.
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);
strcpy(eeprom->serial, serial);
}
-
if (ftdi->type == TYPE_R)
{
eeprom->max_power = 90;
output[0x08] = j;
// Addr 09: Max power consumption: max power = value * 2 mA
- output[0x09] = eeprom->max_power>>1;
+ output[0x09] = eeprom->max_power / MAX_POWER_MILLIAMP_PER_UNIT;
if (ftdi->type != TYPE_AM)
{
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_4232H:
+ if (eeprom->channel_a_driver == DRIVER_VCP)
+ output[0x00] |= DRIVER_VCP;
+ else
+ output[0x00] &= ~DRIVER_VCP;
+ if (eeprom->channel_b_driver == DRIVER_VCP)
+ output[0x01] |= DRIVER_VCP;
+ else
+ output[0x01] &= ~DRIVER_VCP;
+ if (eeprom->channel_c_driver == DRIVER_VCP)
+ output[0x00] |= (DRIVER_VCP << 4);
+ else
+ output[0x00] &= ~(DRIVER_VCP << 4);
+ if (eeprom->channel_d_driver == DRIVER_VCP)
+ output[0x01] |= (DRIVER_VCP << 4);
+ else
+ output[0x01] &= ~(DRIVER_VCP << 4);
+
+ if (eeprom->suspend_pull_downs == 1)
+ output[0x0a] |= 0x4;
+ else
+ output[0x0a] &= ~0x4;
+
+ if (eeprom->channel_a_rs485enable)
+ output[0x0b] |= CHANNEL_IS_RS485 << 0;
+ else
+ output[0x0b] &= ~(CHANNEL_IS_RS485 << 0);
+ if (eeprom->channel_b_rs485enable)
+ output[0x0b] |= CHANNEL_IS_RS485 << 1;
+ else
+ output[0x0b] &= ~(CHANNEL_IS_RS485 << 1);
+ if (eeprom->channel_c_rs485enable)
+ output[0x0b] |= CHANNEL_IS_RS485 << 2;
+ else
+ output[0x0b] &= ~(CHANNEL_IS_RS485 << 2);
+ if (eeprom->channel_d_rs485enable)
+ output[0x0b] |= CHANNEL_IS_RS485 << 3;
+ else
+ output[0x0b] &= ~(CHANNEL_IS_RS485 << 3);
+
+ if (eeprom->group0_drive > DRIVE_16MA)
+ output[0x0c] |= DRIVE_16MA;
+ else
+ output[0x0c] |= eeprom->group0_drive;
+ if (eeprom->group0_schmitt == IS_SCHMITT)
+ output[0x0c] |= IS_SCHMITT;
+ if (eeprom->group0_slew == SLOW_SLEW)
+ output[0x0c] |= SLOW_SLEW;
+
+ if (eeprom->group1_drive > DRIVE_16MA)
+ output[0x0c] |= DRIVE_16MA<<4;
+ else
+ output[0x0c] |= eeprom->group1_drive<<4;
+ if (eeprom->group1_schmitt == IS_SCHMITT)
+ output[0x0c] |= IS_SCHMITT<<4;
+ if (eeprom->group1_slew == SLOW_SLEW)
+ output[0x0c] |= SLOW_SLEW<<4;
+
+ if (eeprom->group2_drive > DRIVE_16MA)
+ output[0x0d] |= DRIVE_16MA;
+ else
+ output[0x0d] |= eeprom->group2_drive;
+ if (eeprom->group2_schmitt == IS_SCHMITT)
+ output[0x0d] |= IS_SCHMITT;
+ if (eeprom->group2_slew == SLOW_SLEW)
+ output[0x0d] |= SLOW_SLEW;
+
+ if (eeprom->group3_drive > DRIVE_16MA)
+ output[0x0d] |= DRIVE_16MA<<4;
+ else
+ output[0x0d] |= eeprom->group3_drive<<4;
+ if (eeprom->group3_schmitt == IS_SCHMITT)
+ output[0x0d] |= IS_SCHMITT<<4;
+ if (eeprom->group3_slew == SLOW_SLEW)
+ output[0x0d] |= SLOW_SLEW<<4;
+
output[0x18] = eeprom->chip;
- fprintf(stderr,"FIXME: Build FT4232H specific EEPROM settings\n");
+
break;
case TYPE_232H:
output[0x00] = type2bit(eeprom->channel_a_type, TYPE_232H);
eeprom->remote_wakeup = buf[0x08] & 0x20;
// Addr 09: Max power consumption: max power = value * 2 mA
- eeprom->max_power = buf[0x09];
+ eeprom->max_power = MAX_POWER_MILLIAMP_PER_UNIT * buf[0x09];
// Addr 0A: Chip configuration
// Bit 7: 0 - reserved
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
else if (ftdi->type == TYPE_R)
{
/* TYPE_R flags D2XX, not VCP as all others*/
- eeprom->channel_a_driver = (~buf[0x00]) & DRIVER_VCP;
+ eeprom->channel_a_driver = ~buf[0x00] & DRIVER_VCP;
eeprom->high_current = buf[0x00] & HIGH_CURRENT_DRIVE_R;
if ( (buf[0x01]&0x40) != 0x40)
fprintf(stderr,
eeprom->cbus_function[3] = (buf[0x15] >> 4) & 0x0f;
eeprom->cbus_function[4] = buf[0x16] & 0x0f;
}
- else if ((ftdi->type == TYPE_2232H) ||(ftdi->type == TYPE_4232H))
+ else if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
{
- eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
- eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
if (ftdi->type == TYPE_2232H)
+ {
+ eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
+ eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
eeprom->suspend_dbus7 = buf[0x01] & SUSPEND_DBUS7_BIT;
+ }
+ else
+ {
+ eeprom->channel_c_driver = (buf[0x00] >> 4) & DRIVER_VCP;
+ eeprom->channel_d_driver = (buf[0x01] >> 4) & DRIVER_VCP;
+ eeprom->channel_a_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 0);
+ eeprom->channel_b_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 1);
+ eeprom->channel_c_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 2);
+ eeprom->channel_d_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 3);
+ }
eeprom->chip = buf[0x18];
eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
if (eeprom->self_powered)
fprintf(stdout, "Self-Powered%s", (eeprom->remote_wakeup)?", USB Remote Wake Up\n":"\n");
else
- fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power * 2,
+ fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power,
(eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
if (eeprom->manufacturer)
fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
fprintf(stdout,"C%d Function: %s\n", i,
cbush_mux[eeprom->cbus_function[i]]);
}
-
}
if (ftdi->type == TYPE_R)
case CHANNEL_B_DRIVER:
*value = ftdi->eeprom->channel_b_driver;
break;
+ case CHANNEL_C_DRIVER:
+ *value = ftdi->eeprom->channel_c_driver;
+ break;
+ case CHANNEL_D_DRIVER:
+ *value = ftdi->eeprom->channel_d_driver;
+ break;
+ case CHANNEL_A_RS485:
+ *value = ftdi->eeprom->channel_a_rs485enable;
+ break;
+ case CHANNEL_B_RS485:
+ *value = ftdi->eeprom->channel_b_rs485enable;
+ break;
+ case CHANNEL_C_RS485:
+ *value = ftdi->eeprom->channel_c_rs485enable;
+ break;
+ case CHANNEL_D_RS485:
+ *value = ftdi->eeprom->channel_d_rs485enable;
+ break;
case CBUS_FUNCTION_0:
*value = ftdi->eeprom->cbus_function[0];
break;
case CHANNEL_B_DRIVER:
ftdi->eeprom->channel_b_driver = value;
break;
+ case CHANNEL_C_DRIVER:
+ ftdi->eeprom->channel_c_driver = value;
+ break;
+ case CHANNEL_D_DRIVER:
+ ftdi->eeprom->channel_d_driver = value;
+ break;
+ case CHANNEL_A_RS485:
+ ftdi->eeprom->channel_a_rs485enable = value;
+ break;
+ case CHANNEL_B_RS485:
+ ftdi->eeprom->channel_b_rs485enable = value;
+ break;
+ case CHANNEL_C_RS485:
+ ftdi->eeprom->channel_c_rs485enable = value;
+ break;
+ case CHANNEL_D_RS485:
+ ftdi->eeprom->channel_d_rs485enable = value;
+ break;
case CBUS_FUNCTION_0:
ftdi->eeprom->cbus_function[0] = value;
break;
git://developer.intra2net.com / libftdi / blobdiff