ftdi.c File Reference
`#include <libusb.h>`
`#include <string.h>`
`#include <errno.h>`
`#include <stdio.h>`
`#include <stdlib.h>`
`#include "ftdi_i.h"`
`#include "ftdi.h"`
`#include "ftdi_version_i.h"`

Go to the source code of this file.

## Macros

#define | ftdi_error_return(code, str)
#define | ftdi_error_return_free_device_list(code, str, devs)
#define | H_CLK 120000000
#define | C_CLK 48000000
#define | MAGIC 0x55aa

## Functions

int | ftdi_init (struct ftdi_context *ftdi)
struct ftdi_context * | ftdi_new (void)
int | ftdi_set_interface (struct ftdi_context *ftdi, enum ftdi_interface interface)
void | ftdi_deinit (struct ftdi_context *ftdi)
void | ftdi_free (struct ftdi_context *ftdi)
void | ftdi_set_usbdev (struct ftdi_context *ftdi, libusb_device_handle *usb)
struct ftdi_version_info | ftdi_get_library_version (void)
| Get libftdi library version. More...
int | ftdi_usb_find_all (struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product)
void | ftdi_list_free (struct ftdi_device_list **devlist)
void | ftdi_list_free2 (struct ftdi_device_list *devlist)
int | ftdi_usb_get_strings (struct ftdi_context *ftdi, struct libusb_device *dev, char *manufacturer, int mnf_len, char *description, int desc_len, char *serial, int serial_len)
int | ftdi_usb_get_strings2 (struct ftdi_context *ftdi, struct libusb_device *dev, char *manufacturer, int mnf_len, char *description, int desc_len, char *serial, int serial_len)
int | ftdi_usb_open_dev (struct ftdi_context *ftdi, libusb_device *dev)
int | ftdi_usb_open (struct ftdi_context *ftdi, int vendor, int product)
int | ftdi_usb_open_desc (struct ftdi_context *ftdi, int vendor, int product, const char *description, const char *serial)
int | ftdi_usb_open_desc_index (struct ftdi_context *ftdi, int vendor, int product, const char *description, const char *serial, unsigned int index)
int | ftdi_usb_open_bus_addr (struct ftdi_context *ftdi, uint8_t bus, uint8_t addr)
int | ftdi_usb_open_string (struct ftdi_context *ftdi, const char *description)
int | ftdi_usb_reset (struct ftdi_context *ftdi)
int | ftdi_usb_purge_rx_buffer (struct ftdi_context *ftdi)
int | ftdi_usb_purge_tx_buffer (struct ftdi_context *ftdi)
int | ftdi_usb_purge_buffers (struct ftdi_context *ftdi)
int | ftdi_usb_close (struct ftdi_context *ftdi)
int | convert_baudrate_UT_export (int baudrate, struct ftdi_context *ftdi, unsigned short *value, unsigned short *index)
| Wrapper function to export ftdi_convert_baudrate() to the unit test Do not use, it's only for the unit test framework. More...
int | ftdi_set_baudrate (struct ftdi_context *ftdi, int baudrate)
int | ftdi_set_line_property (struct ftdi_context *ftdi, enum ftdi_bits_type bits, enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity)
int | ftdi_set_line_property2 (struct ftdi_context *ftdi, enum ftdi_bits_type bits, enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity, enum ftdi_break_type break_type)
int | ftdi_write_data (struct ftdi_context *ftdi, const unsigned char *buf, int size)
struct ftdi_transfer_control * | ftdi_write_data_submit (struct ftdi_context *ftdi, unsigned char *buf, int size)
struct ftdi_transfer_control * | ftdi_read_data_submit (struct ftdi_context *ftdi, unsigned char *buf, int size)
int | ftdi_transfer_data_done (struct ftdi_transfer_control *tc)
void | ftdi_transfer_data_cancel (struct ftdi_transfer_control *tc, struct timeval *to)
int | ftdi_write_data_set_chunksize (struct ftdi_context *ftdi, unsigned int chunksize)
int | ftdi_write_data_get_chunksize (struct ftdi_context *ftdi, unsigned int *chunksize)
int | ftdi_read_data (struct ftdi_context *ftdi, unsigned char *buf, int size)
int | ftdi_read_data_set_chunksize (struct ftdi_context *ftdi, unsigned int chunksize)
int | ftdi_read_data_get_chunksize (struct ftdi_context *ftdi, unsigned int *chunksize)
int | ftdi_set_bitmode (struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
int | ftdi_disable_bitbang (struct ftdi_context *ftdi)
int | ftdi_read_pins (struct ftdi_context *ftdi, unsigned char *pins)
int | ftdi_set_latency_timer (struct ftdi_context *ftdi, unsigned char latency)
int | ftdi_get_latency_timer (struct ftdi_context *ftdi, unsigned char *latency)
int | ftdi_poll_modem_status (struct ftdi_context *ftdi, unsigned short *status)
int | ftdi_setflowctrl (struct ftdi_context *ftdi, int flowctrl)
int | ftdi_setdtr (struct ftdi_context *ftdi, int state)
int | ftdi_setrts (struct ftdi_context *ftdi, int state)
int | ftdi_setdtr_rts (struct ftdi_context *ftdi, int dtr, int rts)
int | ftdi_set_event_char (struct ftdi_context *ftdi, unsigned char eventch, unsigned char enable)
int | ftdi_set_error_char (struct ftdi_context *ftdi, unsigned char errorch, unsigned char enable)
int | ftdi_eeprom_initdefaults (struct ftdi_context *ftdi, char *manufacturer, char *product, char *serial)
int | ftdi_eeprom_set_strings (struct ftdi_context *ftdi, char *manufacturer, char *product, char *serial)
int | ftdi_eeprom_get_strings (struct ftdi_context *ftdi, char *manufacturer, int mnf_len, char *product, int prod_len, char *serial, int serial_len)
void | set_ft232h_cbus (struct ftdi_eeprom *eeprom, unsigned char *output)
int | ftdi_eeprom_build (struct ftdi_context *ftdi)
int | ftdi_eeprom_decode (struct ftdi_context *ftdi, int verbose)
int | ftdi_get_eeprom_value (struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int *value)
int | ftdi_set_eeprom_value (struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int value)
int | ftdi_get_eeprom_buf (struct ftdi_context *ftdi, unsigned char *buf, int size)
int | ftdi_set_eeprom_buf (struct ftdi_context *ftdi, const unsigned char *buf, int size)
int | ftdi_set_eeprom_user_data (struct ftdi_context *ftdi, const char *buf, int size)
int | ftdi_read_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short *eeprom_val)
int | ftdi_read_eeprom (struct ftdi_context *ftdi)
int | ftdi_read_chipid (struct ftdi_context *ftdi, unsigned int *chipid)
int | ftdi_write_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short eeprom_val)
int | ftdi_write_eeprom (struct ftdi_context *ftdi)
int | ftdi_erase_eeprom (struct ftdi_context *ftdi)
const char * | ftdi_get_error_string (struct ftdi_context *ftdi)

## Macro Definition Documentation

## ftdi_error_return

#define ftdi_error_return | ( |  | code,
|  |  | str
| ) |  |

Value:
do { \
if ( ftdi ) \
ftdi->error_str = str; \
else \
fprintf(stderr, str); \
return code; \
} while(0);

Definition at line 41 of file ftdi.c.

## ftdi_error_return_free_device_list

#define ftdi_error_return_free_device_list | ( |  | code,
|  |  | str,
|  |  | devs
| ) |  |

Value:
do { \
libusb_free_device_list(devs,1); \
ftdi->error_str = str; \
return code; \
} while(0);

Definition at line 49 of file ftdi.c.

## H_CLK

#define H_CLK 120000000

## C_CLK

#define C_CLK 48000000

## MAGIC

#define MAGIC 0x55aa

Erase eeprom

This is not supported on FT232R/FT245R according to the MProg manual from FTDI.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | erase failed
  -2 | USB device unavailable
  -3 | Writing magic failed
  -4 | Read EEPROM failed
  -5 | Unexpected EEPROM value

Definition at line 4531 of file ftdi.c.

## Function Documentation

## ftdi_init()

int ftdi_init | ( | struct ftdi_context * | ftdi | ) |

Initializes a ftdi_context.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | couldn't allocate read buffer
  -2 | couldn't allocate struct buffer
  -3 | libusb_init() failed

Remarks
  This should be called before all functions

Definition at line 88 of file ftdi.c.

References AUTO_DETACH_SIO_MODULE, ftdi_context::baudrate, ftdi_context::bitbang_enabled, ftdi_context::bitbang_mode, ftdi_context::eeprom, ftdi_context::error_str, ftdi_error_return, ftdi_read_data_set_chunksize(), ftdi_set_interface(), INTERFACE_ANY, ftdi_context::max_packet_size, ftdi_context::module_detach_mode, ftdi_context::readbuffer, ftdi_context::readbuffer_offset, ftdi_context::readbuffer_remaining, ftdi_context::type, TYPE_BM, ftdi_context::usb_ctx, ftdi_context::usb_dev, ftdi_context::usb_read_timeout, ftdi_context::usb_write_timeout, and ftdi_context::writebuffer_chunksize.

Referenced by ftdi_new().

## ftdi_new()

struct ftdi_context* ftdi_new | ( | void |  | ) |

Allocate and initialize a new ftdi_context

Returns
  a pointer to a new ftdi_context, or NULL on failure

Definition at line 128 of file ftdi.c.

References ftdi_init().

## ftdi_set_interface()

int ftdi_set_interface | ( | struct ftdi_context * | ftdi,
|  | enum ftdi_interface | interface
| ) |  |

Open selected channels on a chip, otherwise use first channel.

Parameters

  ftdi | pointer to ftdi_context
  interface | Interface to use for FT2232C/2232H/4232H chips.

Return values

  0 | all fine
  -1 | unknown interface
  -2 | USB device unavailable
  -3 | Device already open, interface can't be set in that state

Definition at line 157 of file ftdi.c.

References ftdi_error_return, ftdi_context::in_ep, ftdi_context::index, ftdi_context::interface, INTERFACE_A, INTERFACE_ANY, INTERFACE_B, INTERFACE_C, INTERFACE_D, ftdi_context::out_ep, and ftdi_context::usb_dev.

Referenced by ftdi_init().

## ftdi_deinit()

void ftdi_deinit | ( | struct ftdi_context * | ftdi | ) |

Deinitializes a ftdi_context.

Parameters

  ftdi | pointer to ftdi_context

Definition at line 210 of file ftdi.c.

Referenced by ftdi_free().

## ftdi_free()

void ftdi_free | ( | struct ftdi_context * | ftdi | ) |

Deinitialize and free an ftdi_context.

Parameters

  ftdi | pointer to ftdi_context

Definition at line 256 of file ftdi.c.

References ftdi_deinit().

## ftdi_set_usbdev()

void ftdi_set_usbdev | ( | struct ftdi_context * | ftdi,
|  | libusb_device_handle * | usb
| ) |  |

Use an already open libusb device.

Parameters

  ftdi | pointer to ftdi_context
  usb | libusb libusb_device_handle to use

Definition at line 268 of file ftdi.c.

References ftdi_context::usb_dev.

Referenced by Ftdi::Context::set_interface().

## ftdi_get_library_version()

struct ftdi_version_info ftdi_get_library_version | ( | void |  | ) |

Get libftdi library version.

Returns
  ftdi_version_info Library version information

Definition at line 281 of file ftdi.c.

References ftdi_version_info::major, ftdi_version_info::micro, ftdi_version_info::minor, ftdi_version_info::snapshot_str, and ftdi_version_info::version_str.

## ftdi_usb_find_all()

int ftdi_usb_find_all | ( | struct ftdi_context * | ftdi,
|  | struct ftdi_device_list ** | devlist,
|  | int | vendor,
|  | int | product
| ) |  |

Finds all ftdi devices with given VID:PID on the usb bus. Creates a new ftdi_device_list which needs to be deallocated by ftdi_list_free() after use. With VID:PID 0:0, search for the default devices (0x403:0x6001, 0x403:0x6010, 0x403:0x6011, 0x403:0x6014, 0x403:0x6015)

Parameters

  ftdi | pointer to ftdi_context
  devlist | Pointer where to store list of found devices
  vendor | Vendor ID to search for
  product | Product ID to search for

Return values

  >0 | number of devices found
  -3 | out of memory
  -5 | libusb_get_device_list() failed
  -6 | libusb_get_device_descriptor() failed

Definition at line 310 of file ftdi.c.

References ftdi_device_list::dev, ftdi_error_return, ftdi_error_return_free_device_list, ftdi_device_list::next, and ftdi_context::usb_ctx.

Referenced by Ftdi::List::erase().

## ftdi_list_free()

void ftdi_list_free | ( | struct ftdi_device_list ** | devlist | ) |

Frees a usb device list.

Parameters

  devlist | USB device list created by ftdi_usb_find_all()

Definition at line 358 of file ftdi.c.

References ftdi_device_list::dev, and ftdi_device_list::next.

Referenced by Ftdi::List::clear(), ftdi_list_free2(), and Ftdi::List::Private::Private().

## ftdi_list_free2()

void ftdi_list_free2 | ( | struct ftdi_device_list * | devlist | ) |

Frees a usb device list.

Parameters

  devlist | USB device list created by ftdi_usb_find_all()

Definition at line 378 of file ftdi.c.

References ftdi_list_free().

## ftdi_usb_get_strings()

int ftdi_usb_get_strings | ( | struct ftdi_context * | ftdi,
|  | struct libusb_device * | dev,
|  | char * | manufacturer,
|  | int | mnf_len,
|  | char * | description,
|  | int | desc_len,
|  | char * | serial,
|  | int | serial_len
| ) |  |

Return device ID strings from the usb device.

The parameters manufacturer, description and serial may be NULL or pointer to buffers to store the fetched strings.

Note
  Use this function only in combination with ftdi_usb_find_all() as it closes the internal "usb_dev" after use.

Parameters

  ftdi | pointer to ftdi_context
  dev | libusb usb_dev to use
  manufacturer | Store manufacturer string here if not NULL
  mnf_len | Buffer size of manufacturer string
  description | Store product description string here if not NULL
  desc_len | Buffer size of product description string
  serial | Store serial string here if not NULL
  serial_len | Buffer size of serial string

Return values

  0 | all fine
  -1 | wrong arguments
  -4 | unable to open device
  -7 | get product manufacturer failed
  -8 | get product description failed
  -9 | get serial number failed
  -11 | libusb_get_device_descriptor() failed

Definition at line 409 of file ftdi.c.

References ftdi_device_list::dev, ftdi_error_return, ftdi_usb_get_strings2(), and ftdi_context::usb_dev.

## ftdi_usb_get_strings2()

int ftdi_usb_get_strings2 | ( | struct ftdi_context * | ftdi,
|  | struct libusb_device * | dev,
|  | char * | manufacturer,
|  | int | mnf_len,
|  | char * | description,
|  | int | desc_len,
|  | char * | serial,
|  | int | serial_len
| ) |  |

Return device ID strings from the usb device.

The parameters manufacturer, description and serial may be NULL or pointer to buffers to store the fetched strings.

Note
  The old function ftdi_usb_get_strings() always closes the device. This version only closes the device if it was opened by it.

Parameters

  ftdi | pointer to ftdi_context
  dev | libusb usb_dev to use
  manufacturer | Store manufacturer string here if not NULL
  mnf_len | Buffer size of manufacturer string
  description | Store product description string here if not NULL
  desc_len | Buffer size of product description string
  serial | Store serial string here if not NULL
  serial_len | Buffer size of serial string

Return values

  0 | all fine
  -1 | wrong arguments
  -4 | unable to open device
  -7 | get product manufacturer failed
  -8 | get product description failed
  -9 | get serial number failed
  -11 | libusb_get_device_descriptor() failed

Definition at line 466 of file ftdi.c.

References ftdi_error_return, and ftdi_context::usb_dev.

Referenced by ftdi_usb_get_strings().

## ftdi_usb_open_dev()

int ftdi_usb_open_dev | ( | struct ftdi_context * | ftdi,
|  | libusb_device * | dev
| ) |  |

Opens a ftdi device given by an usb_device.

Parameters

  ftdi | pointer to ftdi_context
  dev | libusb usb_dev to use

Return values

  0 | all fine
  -3 | unable to config device
  -4 | unable to open device
  -5 | unable to claim device
  -6 | reset failed
  -7 | set baudrate failed
  -8 | ftdi context invalid
  -9 | libusb_get_device_descriptor() failed
  -10 | libusb_get_config_descriptor() failed
  -11 | libusb_detach_kernel_driver() failed
  -12 | libusb_get_configuration() failed

Definition at line 585 of file ftdi.c.

References AUTO_DETACH_SIO_MODULE, ftdi_error_return, ftdi_context::interface, ftdi_context::module_detach_mode, and ftdi_context::usb_dev.

Referenced by ftdi_usb_open_bus_addr(), ftdi_usb_open_string(), and Ftdi::Context::get_strings_and_reopen().

## ftdi_usb_open()

int ftdi_usb_open | ( | struct ftdi_context * | ftdi,
|  | int | vendor,
|  | int | product
| ) |  |

Opens the first device with a given vendor and product ids.

Parameters

  ftdi | pointer to ftdi_context
  vendor | Vendor ID
  product | Product ID

Return values

  same | as ftdi_usb_open_desc()

Definition at line 698 of file ftdi.c.

References ftdi_usb_open_desc().

Referenced by Ftdi::Context::is_open().

## ftdi_usb_open_desc()

int ftdi_usb_open_desc | ( | struct ftdi_context * | ftdi,
|  | int | vendor,
|  | int | product,
|  | const char * | description,
|  | const char * | serial
| ) |  |

Opens the first device with a given, vendor id, product id, description and serial.

Parameters

  ftdi | pointer to ftdi_context
  vendor | Vendor ID
  product | Product ID
  description | Description to search for. Use NULL if not needed.
  serial | Serial to search for. Use NULL if not needed.

Return values

  0 | all fine
  -3 | usb device not found
  -4 | unable to open device
  -5 | unable to claim device
  -6 | reset failed
  -7 | set baudrate failed
  -8 | get product description failed
  -9 | get serial number failed
  -12 | libusb_get_device_list() failed
  -13 | libusb_get_device_descriptor() failed

Definition at line 724 of file ftdi.c.

References ftdi_usb_open_desc_index().

Referenced by ftdi_usb_open().

## ftdi_usb_open_desc_index()

int ftdi_usb_open_desc_index | ( | struct ftdi_context * | ftdi,
|  | int | vendor,
|  | int | product,
|  | const char * | description,
|  | const char * | serial,
|  | unsigned int | index
| ) |  |

Opens the index-th device with a given, vendor id, product id, description and serial.

Parameters

  ftdi | pointer to ftdi_context
  vendor | Vendor ID
  product | Product ID
  description | Description to search for. Use NULL if not needed.
  serial | Serial to search for. Use NULL if not needed.
  index | Number of matching device to open if there are more than one, starts with 0.

Return values

  0 | all fine
  -1 | usb_find_busses() failed
  -2 | usb_find_devices() failed
  -3 | usb device not found
  -4 | unable to open device
  -5 | unable to claim device
  -6 | reset failed
  -7 | set baudrate failed
  -8 | get product description failed
  -9 | get serial number failed
  -10 | unable to close device
  -11 | ftdi context invalid
  -12 | libusb_get_device_list() failed

Definition at line 755 of file ftdi.c.

References ftdi_error_return, ftdi_error_return_free_device_list, ftdi_context::usb_ctx, and ftdi_context::usb_dev.

Referenced by ftdi_usb_open_desc(), and ftdi_usb_open_string().

## ftdi_usb_open_bus_addr()

int ftdi_usb_open_bus_addr | ( | struct ftdi_context * | ftdi,
|  | uint8_t | bus,
|  | uint8_t | addr
| ) |  |

Opens the device at a given USB bus and device address.

Parameters

  ftdi | pointer to ftdi_context
  bus | Bus number
  addr | Device address

Return values

  0 | all fine
  -1 | usb_find_busses() failed
  -2 | usb_find_devices() failed
  -3 | usb device not found
  -4 | unable to open device
  -5 | unable to claim device
  -6 | reset failed
  -7 | set baudrate failed
  -8 | get product description failed
  -9 | get serial number failed
  -10 | unable to close device
  -11 | ftdi context invalid
  -12 | libusb_get_device_list() failed

Definition at line 848 of file ftdi.c.

References ftdi_error_return, ftdi_error_return_free_device_list, ftdi_usb_open_dev(), and ftdi_context::usb_ctx.

## ftdi_usb_open_string()

int ftdi_usb_open_string | ( | struct ftdi_context * | ftdi,
|  | const char * | description
| ) |  |

Opens the ftdi-device described by a description-string. Intended to be used for parsing a device-description given as commandline argument.

Parameters

  ftdi | pointer to ftdi_context

  description

  NULL-terminated description-string, using this format:
  - `d:<devicenode>` path of bus and device-node (e.g. "003/001") within usb device tree (usually at /proc/bus/usb/)
  - `i:<vendor>:<product>` first device with given vendor and product id, ids can be decimal, octal (preceded by "0") or hex (preceded by "0x")
  - `i:<vendor>:<product>:<index>` as above with index being the number of the device (starting with 0) if there are more than one
  - `s:<vendor>:<product>:<serial>` first device with given vendor id, product id and serial string

Note
  The description format may be extended in later versions.

Return values

  0 | all fine
  -2 | libusb_get_device_list() failed
  -3 | usb device not found
  -4 | unable to open device
  -5 | unable to claim device
  -6 | reset failed
  -7 | set baudrate failed
  -8 | get product description failed
  -9 | get serial number failed
  -10 | unable to close device
  -11 | illegal description format
  -12 | ftdi context invalid

Definition at line 901 of file ftdi.c.

References ftdi_error_return, ftdi_error_return_free_device_list, ftdi_usb_open_desc_index(), ftdi_usb_open_dev(), and ftdi_context::usb_ctx.

## ftdi_usb_reset()

int ftdi_usb_reset | ( | struct ftdi_context * | ftdi | ) |

Resets the ftdi device.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | FTDI reset failed
  -2 | USB device unavailable

Definition at line 994 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, ftdi_context::readbuffer_offset, ftdi_context::readbuffer_remaining, SIO_RESET_REQUEST, SIO_RESET_SIO, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by ftdi_write_eeprom().

## ftdi_usb_purge_rx_buffer()

int ftdi_usb_purge_rx_buffer | ( | struct ftdi_context * | ftdi | ) |

Clears the read buffer on the chip and the internal read buffer.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | read buffer purge failed
  -2 | USB device unavailable

Definition at line 1020 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, ftdi_context::readbuffer_offset, ftdi_context::readbuffer_remaining, SIO_RESET_PURGE_RX, SIO_RESET_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by ftdi_usb_purge_buffers().

## ftdi_usb_purge_tx_buffer()

int ftdi_usb_purge_tx_buffer | ( | struct ftdi_context * | ftdi | ) |

Clears the write buffer on the chip.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | write buffer purge failed
  -2 | USB device unavailable

Definition at line 1046 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_RESET_PURGE_TX, SIO_RESET_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by ftdi_usb_purge_buffers().

## ftdi_usb_purge_buffers()

int ftdi_usb_purge_buffers | ( | struct ftdi_context * | ftdi | ) |

Clears the buffers on the chip and the internal read buffer.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | read buffer purge failed
  -2 | write buffer purge failed
  -3 | USB device unavailable

Definition at line 1069 of file ftdi.c.

References ftdi_error_return, ftdi_usb_purge_rx_buffer(), ftdi_usb_purge_tx_buffer(), and ftdi_context::usb_dev.

## ftdi_usb_close()

int ftdi_usb_close | ( | struct ftdi_context * | ftdi | ) |

Closes the ftdi device. Call ftdi_deinit() if you're cleaning up.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | usb_release failed
  -3 | ftdi context invalid

Definition at line 1098 of file ftdi.c.

References ftdi_error_return, ftdi_context::interface, and ftdi_context::usb_dev.

## convert_baudrate_UT_export()

int convert_baudrate_UT_export | ( | int | baudrate,
|  | struct ftdi_context * | ftdi,
|  | unsigned short * | value,
|  | unsigned short * | index
| ) |  |

Wrapper function to export ftdi_convert_baudrate() to the unit test Do not use, it's only for the unit test framework.

Definition at line 1332 of file ftdi.c.

## ftdi_set_baudrate()

int ftdi_set_baudrate | ( | struct ftdi_context * | ftdi,
|  | int | baudrate
| ) |  |

Sets the chip baud rate

Parameters

  ftdi | pointer to ftdi_context
  baudrate | baud rate to set

Return values

  0 | all fine
  -1 | invalid baudrate
  -2 | setting baudrate failed
  -3 | USB device unavailable

Definition at line 1349 of file ftdi.c.

References ftdi_context::bitbang_enabled, ftdi_error_return, and ftdi_context::usb_dev.

Referenced by Ftdi::Context::set_usb_device().

## ftdi_set_line_property()

int ftdi_set_line_property | ( | struct ftdi_context * | ftdi,
|  | enum ftdi_bits_type | bits,
|  | enum ftdi_stopbits_type | sbit,
|  | enum ftdi_parity_type | parity
| ) |  |

Set (RS232) line characteristics. The break type can only be set via ftdi_set_line_property2() and defaults to "off".

Parameters

  ftdi | pointer to ftdi_context
  bits | Number of bits
  sbit | Number of stop bits
  parity | Parity mode

Return values

  0 | all fine
  -1 | Setting line property failed

Definition at line 1395 of file ftdi.c.

References BREAK_OFF, and ftdi_set_line_property2().

Referenced by Ftdi::Context::set_baud_rate().

## ftdi_set_line_property2()

int ftdi_set_line_property2 | ( | struct ftdi_context * | ftdi,
|  | enum ftdi_bits_type | bits,
|  | enum ftdi_stopbits_type | sbit,
|  | enum ftdi_parity_type | parity,
|  | enum ftdi_break_type | break_type
| ) |  |

Set (RS232) line characteristics

Parameters

  ftdi | pointer to ftdi_context
  bits | Number of bits
  sbit | Number of stop bits
  parity | Parity mode
  break_type | Break type

Return values

  0 | all fine
  -1 | Setting line property failed
  -2 | USB device unavailable

Definition at line 1414 of file ftdi.c.

References BREAK_OFF, BREAK_ON, EVEN, FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, MARK, NONE, ODD, SIO_SET_DATA_REQUEST, SPACE, STOP_BIT_1, STOP_BIT_15, STOP_BIT_2, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by ftdi_set_line_property(), and Ftdi::Context::set_line_property().

## ftdi_write_data()

int ftdi_write_data | ( | struct ftdi_context * | ftdi,
|  | const unsigned char * | buf,
|  | int | size
| ) |  |

Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip

Parameters

  ftdi | pointer to ftdi_context
  buf | Buffer with the data
  size | Size of the buffer

Return values

  -666 | USB device unavailable
  <0 | error code from usb_bulk_write()
  >0 | number of bytes written

Definition at line 1484 of file ftdi.c.

References ftdi_error_return, ftdi_context::in_ep, ftdi_context::usb_dev, ftdi_context::usb_write_timeout, and ftdi_context::writebuffer_chunksize.

## ftdi_write_data_submit()

struct ftdi_transfer_control* ftdi_write_data_submit | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | buf,
|  | int | size
| ) |  |

Writes data to the chip. Does not wait for completion of the transfer nor does it make sure that the transfer was successful.

Use libusb 1.0 asynchronous API.

Parameters

  ftdi | pointer to ftdi_context
  buf | Buffer with the data
  size | Size of the buffer

Return values

  NULL | Some error happens when submit transfer
  !NULL | Pointer to a ftdi_transfer_control

Definition at line 1644 of file ftdi.c.

References ftdi_transfer_control::buf, ftdi_transfer_control::completed, ftdi_transfer_control::ftdi, ftdi_context::in_ep, ftdi_transfer_control::offset, ftdi_transfer_control::size, ftdi_transfer_control::transfer, ftdi_context::usb_dev, and ftdi_context::writebuffer_chunksize.

## ftdi_read_data_submit()

struct ftdi_transfer_control* ftdi_read_data_submit | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | buf,
|  | int | size
| ) |  |

Reads data from the chip. Does not wait for completion of the transfer nor does it make sure that the transfer was successful.

Use libusb 1.0 asynchronous API.

Parameters

  ftdi | pointer to ftdi_context
  buf | Buffer with the data
  size | Size of the buffer

Return values

  NULL | Some error happens when submit transfer
  !NULL | Pointer to a ftdi_transfer_control

Definition at line 1706 of file ftdi.c.

References ftdi_transfer_control::buf, ftdi_transfer_control::completed, ftdi_transfer_control::ftdi, ftdi_transfer_control::offset, ftdi_context::out_ep, ftdi_context::readbuffer, ftdi_context::readbuffer_chunksize, ftdi_context::readbuffer_offset, ftdi_context::readbuffer_remaining, ftdi_transfer_control::size, ftdi_transfer_control::transfer, and ftdi_context::usb_dev.

## ftdi_transfer_data_done()

int ftdi_transfer_data_done | ( | struct ftdi_transfer_control * | tc | ) |

Wait for completion of the transfer.

Use libusb 1.0 asynchronous API.

Parameters

  tc | pointer to ftdi_transfer_control

Return values

  < | 0: Some error happens
  >= | 0: Data size transferred

tc->transfer could be NULL if "(size <= ftdi->readbuffer_remaining)" at ftdi_read_data_submit(). Therefore, we need to check it here.

Definition at line 1785 of file ftdi.c.

References ftdi_transfer_control::completed, ftdi_transfer_control::ftdi, ftdi_transfer_control::offset, ftdi_transfer_control::transfer, and ftdi_context::usb_ctx.

## ftdi_transfer_data_cancel()

void ftdi_transfer_data_cancel | ( | struct ftdi_transfer_control * | tc,
|  | struct timeval * | to
| ) |  |

Cancel transfer and wait for completion.

Use libusb 1.0 asynchronous API.

Parameters

  tc | pointer to ftdi_transfer_control
  to | pointer to timeout value or NULL for infinite

Definition at line 1832 of file ftdi.c.

References ftdi_transfer_control::completed, ftdi_transfer_control::ftdi, ftdi_transfer_control::transfer, and ftdi_context::usb_ctx.

## ftdi_write_data_set_chunksize()

int ftdi_write_data_set_chunksize | ( | struct ftdi_context * | ftdi,
|  | unsigned int | chunksize
| ) |  |

Configure write buffer chunk size. Default is 4096.

Parameters

  ftdi | pointer to ftdi_context
  chunksize | Chunk size

Return values

  0 | all fine
  -1 | ftdi context invalid

Definition at line 1866 of file ftdi.c.

References ftdi_error_return, and ftdi_context::writebuffer_chunksize.

Referenced by Ftdi::Context::write().

## ftdi_write_data_get_chunksize()

int ftdi_write_data_get_chunksize | ( | struct ftdi_context * | ftdi,
|  | unsigned int * | chunksize
| ) |  |

Get write buffer chunk size.

Parameters

  ftdi | pointer to ftdi_context
  chunksize | Pointer to store chunk size in

Return values

  0 | all fine
  -1 | ftdi context invalid

Definition at line 1884 of file ftdi.c.

References ftdi_error_return, and ftdi_context::writebuffer_chunksize.

Referenced by Ftdi::Context::set_write_chunk_size().

## ftdi_read_data()

int ftdi_read_data | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | buf,
|  | int | size
| ) |  |

Reads data in chunks (see ftdi_read_data_set_chunksize()) from the chip.

Automatically strips the two modem status bytes transfered during every read.

Parameters

  ftdi | pointer to ftdi_context
  buf | Buffer to store data in
  size | Size of the buffer

Return values

  -666 | USB device unavailable
  <0 | error code from libusb_bulk_transfer()
  0 | no data was available
  >0 | number of bytes read

Definition at line 1908 of file ftdi.c.

References ftdi_error_return, ftdi_context::max_packet_size, ftdi_context::out_ep, ftdi_context::readbuffer, ftdi_context::readbuffer_chunksize, ftdi_context::readbuffer_offset, ftdi_context::readbuffer_remaining, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by Ftdi::Context::set_usb_write_timeout().

## ftdi_read_data_set_chunksize()

int ftdi_read_data_set_chunksize | ( | struct ftdi_context * | ftdi,
|  | unsigned int | chunksize
| ) |  |

Configure read buffer chunk size. Default is 4096.

Automatically reallocates the buffer.

Parameters

  ftdi | pointer to ftdi_context
  chunksize | Chunk size

Return values

  0 | all fine
  -1 | ftdi context invalid

Definition at line 2033 of file ftdi.c.

References ftdi_error_return, ftdi_context::readbuffer, ftdi_context::readbuffer_chunksize, ftdi_context::readbuffer_offset, and ftdi_context::readbuffer_remaining.

Referenced by ftdi_init(), and Ftdi::Context::read().

## ftdi_read_data_get_chunksize()

int ftdi_read_data_get_chunksize | ( | struct ftdi_context * | ftdi,
|  | unsigned int * | chunksize
| ) |  |

Get read buffer chunk size.

Parameters

  ftdi | pointer to ftdi_context
  chunksize | Pointer to store chunk size in

Return values

  0 | all fine
  -1 | FTDI context invalid

Definition at line 2070 of file ftdi.c.

References ftdi_error_return, and ftdi_context::readbuffer_chunksize.

Referenced by Ftdi::Context::set_read_chunk_size().

## ftdi_set_bitmode()

int ftdi_set_bitmode | ( | struct ftdi_context * | ftdi,
|  | unsigned char | bitmask,
|  | unsigned char | mode
| ) |  |

Enable/disable bitbang modes.

Parameters

  ftdi | pointer to ftdi_context
  bitmask | Bitmask to configure lines. HIGH/ON value configures a line as output.
  mode | Bitbang mode: use the values defined in ftdi_mpsse_mode

Return values

  0 | all fine
  -1 | can't enable bitbang mode
  -2 | USB device unavailable

Definition at line 2091 of file ftdi.c.

References ftdi_context::bitbang_enabled, ftdi_context::bitbang_mode, BITMODE_RESET, FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_BITMODE_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Context::set_bitmode(), and Ftdi::Context::set_error_char().

## ftdi_disable_bitbang()

int ftdi_disable_bitbang | ( | struct ftdi_context * | ftdi | ) |

Disable bitbang mode.

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | can't disable bitbang mode
  -2 | USB device unavailable

Definition at line 2117 of file ftdi.c.

References ftdi_context::bitbang_enabled, FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_BITMODE_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Context::set_bitmode().

## ftdi_read_pins()

int ftdi_read_pins | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | pins
| ) |  |

Directly read pin state, circumventing the read buffer. Useful for bitbang mode.

Parameters

  ftdi | pointer to ftdi_context
  pins | Pointer to store pins into

Return values

  0 | all fine
  -1 | read pins failed
  -2 | USB device unavailable

Definition at line 2140 of file ftdi.c.

References FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_READ_PINS_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by Ftdi::Context::bitbang_disable().

## ftdi_set_latency_timer()

int ftdi_set_latency_timer | ( | struct ftdi_context * | ftdi,
|  | unsigned char | latency
| ) |  |

Set latency timer

The FTDI chip keeps data in the internal buffer for a specific amount of time if the buffer is not full yet to decrease load on the usb bus.

Parameters

  ftdi | pointer to ftdi_context
  latency | Value between 1 and 255

Return values

  0 | all fine
  -1 | latency out of range
  -2 | unable to set latency timer
  -3 | USB device unavailable

Definition at line 2166 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_LATENCY_TIMER_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by ftdi_write_eeprom(), and Ftdi::Context::set_rts().

## ftdi_get_latency_timer()

int ftdi_get_latency_timer | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | latency
| ) |  |

Get latency timer

Parameters

  ftdi | pointer to ftdi_context
  latency | Pointer to store latency value in

Return values

  0 | all fine
  -1 | unable to get latency timer
  -2 | USB device unavailable

Definition at line 2193 of file ftdi.c.

References FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_GET_LATENCY_TIMER_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by Ftdi::Context::set_latency().

## ftdi_poll_modem_status()

int ftdi_poll_modem_status | ( | struct ftdi_context * | ftdi,
|  | unsigned short * | status
| ) |  |

Poll modem status information

This function allows the retrieve the two status bytes of the device. The device sends these bytes also as a header for each read access where they are discarded by ftdi_read_data(). The chip generates the two stripped status bytes in the absence of data every 40 ms.

Layout of the first byte:

- B0..B3 - must be 0
- B4 Clear to send (CTS) 0 = inactive 1 = active
- B5 Data set ready (DTS) 0 = inactive 1 = active
- B6 Ring indicator (RI) 0 = inactive 1 = active
- B7 Receive line signal detect (RLSD) 0 = inactive 1 = active

Layout of the second byte:

- B0 Data ready (DR)
- B1 Overrun error (OE)
- B2 Parity error (PE)
- B3 Framing error (FE)
- B4 Break interrupt (BI)
- B5 Transmitter holding register (THRE)
- B6 Transmitter empty (TEMT)
- B7 Error in RCVR FIFO

Parameters

  ftdi | pointer to ftdi_context
  status | Pointer to store status information in. Must be two bytes.

Return values

  0 | all fine
  -1 | unable to retrieve status information
  -2 | USB device unavailable

Definition at line 2247 of file ftdi.c.

References FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_POLL_MODEM_STATUS_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by ftdi_write_eeprom().

## ftdi_setflowctrl()

int ftdi_setflowctrl | ( | struct ftdi_context * | ftdi,
|  | int | flowctrl
| ) |  |

Set flowcontrol for ftdi chip

Parameters

  ftdi | pointer to ftdi_context
  flowctrl | flow control to use. should be SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS

Return values

  0 | all fine
  -1 | set flow control failed
  -2 | USB device unavailable

Definition at line 2273 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_FLOW_CTRL_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

## ftdi_setdtr()

int ftdi_setdtr | ( | struct ftdi_context * | ftdi,
|  | int | state
| ) |  |

Set dtr line

Parameters

  ftdi | pointer to ftdi_context
  state | state to set line to (1 or 0)

Return values

  0 | all fine
  -1 | set dtr failed
  -2 | USB device unavailable

Definition at line 2296 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_DTR_HIGH, SIO_SET_DTR_LOW, SIO_SET_MODEM_CTRL_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

## ftdi_setrts()

int ftdi_setrts | ( | struct ftdi_context * | ftdi,
|  | int | state
| ) |  |

Set rts line

Parameters

  ftdi | pointer to ftdi_context
  state | state to set line to (1 or 0)

Return values

  0 | all fine
  -1 | set rts failed
  -2 | USB device unavailable

Definition at line 2326 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_MODEM_CTRL_REQUEST, SIO_SET_RTS_HIGH, SIO_SET_RTS_LOW, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Context::set_dtr().

## ftdi_setdtr_rts()

int ftdi_setdtr_rts | ( | struct ftdi_context * | ftdi,
|  | int | dtr,
|  | int | rts
| ) |  |

Set dtr and rts line in one pass

Parameters

  ftdi | pointer to ftdi_context
  dtr | DTR state to set line to (1 or 0)
  rts | RTS state to set line to (1 or 0)

Return values

  0 | all fine
  -1 | set dtr/rts failed
  -2 | USB device unavailable

Definition at line 2357 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_DTR_HIGH, SIO_SET_DTR_LOW, SIO_SET_MODEM_CTRL_REQUEST, SIO_SET_RTS_HIGH, SIO_SET_RTS_LOW, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

## ftdi_set_event_char()

int ftdi_set_event_char | ( | struct ftdi_context * | ftdi,
|  | unsigned char | eventch,
|  | unsigned char | enable
| ) |  |

Set the special event character

Parameters

  ftdi | pointer to ftdi_context
  eventch | Event character
  enable | 0 to disable the event character, non-zero otherwise

Return values

  0 | all fine
  -1 | unable to set event character
  -2 | USB device unavailable

Definition at line 2393 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_EVENT_CHAR_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

## ftdi_set_error_char()

int ftdi_set_error_char | ( | struct ftdi_context * | ftdi,
|  | unsigned char | errorch,
|  | unsigned char | enable
| ) |  |

Set error character

Parameters

  ftdi | pointer to ftdi_context
  errorch | Error character
  enable | 0 to disable the error character, non-zero otherwise

Return values

  0 | all fine
  -1 | unable to set error character
  -2 | USB device unavailable

Definition at line 2422 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_context::index, SIO_SET_ERROR_CHAR_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Context::set_event_char().

## ftdi_eeprom_initdefaults()

int ftdi_eeprom_initdefaults | ( | struct ftdi_context * | ftdi,
|  | char * | manufacturer,
|  | char * | product,
|  | char * | serial
| ) |  |

Init eeprom with default values for the connected device

Parameters

  ftdi | pointer to ftdi_context
  manufacturer | String to use as Manufacturer
  product | String to use as Product description
  serial | String to use as Serial number description

Return values

  0 | all fine
  -1 | No struct ftdi_context
  -2 | No struct ftdi_eeprom
  -3 | No connected device or device not yet opened

Definition at line 2452 of file ftdi.c.

References ftdi_eeprom::cbus_function, CBUS_PWREN, CBUS_RXLED, CBUS_SLEEP, CBUS_TXDEN, CBUS_TXLED, CBUSH_TRISTATE, CBUSX_RXLED, CBUSX_SLEEP, CBUSX_TXDEN, CBUSX_TXLED, ftdi_context::eeprom, ftdi_error_return, ftdi_eeprom::manufacturer, ftdi_eeprom::max_power, ftdi_eeprom::product, ftdi_eeprom::product_id, ftdi_eeprom::release_number, ftdi_eeprom::serial, ftdi_eeprom::size, ftdi_context::type, TYPE_2232C, TYPE_2232H, TYPE_230X, TYPE_232H, TYPE_4232H, TYPE_AM, TYPE_BM, TYPE_R, ftdi_context::usb_dev, ftdi_eeprom::usb_version, ftdi_eeprom::use_serial, and ftdi_eeprom::vendor_id.

Referenced by Ftdi::Eeprom::~Eeprom().

## ftdi_eeprom_set_strings()

int ftdi_eeprom_set_strings | ( | struct ftdi_context * | ftdi,
|  | char * | manufacturer,
|  | char * | product,
|  | char * | serial
| ) |  |

Definition at line 2600 of file ftdi.c.

References ftdi_context::eeprom, ftdi_error_return, ftdi_eeprom::manufacturer, ftdi_eeprom::product, ftdi_eeprom::serial, ftdi_context::usb_dev, and ftdi_eeprom::use_serial.

## ftdi_eeprom_get_strings()

int ftdi_eeprom_get_strings | ( | struct ftdi_context * | ftdi,
|  | char * | manufacturer,
|  | int | mnf_len,
|  | char * | product,
|  | int | prod_len,
|  | char * | serial,
|  | int | serial_len
| ) |  |

Return device ID strings from the eeprom. Device needs to be connected.

The parameters manufacturer, description and serial may be NULL or pointer to buffers to store the fetched strings.

Parameters

  ftdi | pointer to ftdi_context
  manufacturer | Store manufacturer string here if not NULL
  mnf_len | Buffer size of manufacturer string
  product | Store product description string here if not NULL
  prod_len | Buffer size of product description string
  serial | Store serial string here if not NULL
  serial_len | Buffer size of serial string

Return values

  0 | all fine
  -1 | ftdi context invalid
  -2 | ftdi eeprom buffer invalid

Definition at line 2666 of file ftdi.c.

References ftdi_context::eeprom, ftdi_error_return, ftdi_eeprom::manufacturer, ftdi_eeprom::product, and ftdi_eeprom::serial.

## set_ft232h_cbus()

void set_ft232h_cbus | ( | struct ftdi_eeprom * | eeprom,
|  | unsigned char * | output
| ) |  |

Definition at line 2705 of file ftdi.c.

References ftdi_eeprom::cbus_function, CBUSH_CLK7_5, and CBUSH_TRISTATE.

## ftdi_eeprom_build()

int ftdi_eeprom_build | ( | struct ftdi_context * | ftdi | ) |

Build binary buffer from ftdi_eeprom structure. Output is suitable for ftdi_write_eeprom().

Parameters

  ftdi | pointer to ftdi_context

Return values

  >=0 | size of eeprom user area in bytes
  -1 | eeprom size (128 bytes) exceeded by custom strings
  -2 | Invalid eeprom or ftdi pointer
  -3 | Invalid cbus function setting (FIXME: Not in the code?)
  -4 | Chip doesn't support invert (FIXME: Not in the code?)
  -5 | Chip doesn't support high current drive (FIXME: Not in the code?)
  -6 | No connected EEPROM or EEPROM Type unknown

Definition at line 2783 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_eeprom::chip, ftdi_context::eeprom, ftdi_error_return, FTDI_MAX_EEPROM_SIZE, ftdi_eeprom::in_is_isochronous, ftdi_eeprom::is_not_pnp, ftdi_eeprom::manufacturer, ftdi_eeprom::max_power, MAX_POWER_MILLIAMP_PER_UNIT, ftdi_eeprom::out_is_isochronous, ftdi_eeprom::product, ftdi_eeprom::product_id, ftdi_eeprom::release_number, ftdi_eeprom::remote_wakeup, ftdi_eeprom::self_powered, ftdi_eeprom::serial, ftdi_eeprom::size, ftdi_context::type, TYPE_2232C, TYPE_2232H, TYPE_230X, TYPE_232H, TYPE_4232H, TYPE_AM, TYPE_BM, TYPE_R, ftdi_eeprom::usb_version, ftdi_eeprom::use_serial, USE_SERIAL_NUM, ftdi_eeprom::use_usb_version, USE_USB_VERSION_BIT, and ftdi_eeprom::vendor_id.

Referenced by Ftdi::Eeprom::chip_id().

## ftdi_eeprom_decode()

int ftdi_eeprom_decode | ( | struct ftdi_context * | ftdi,
|  | int | verbose
| ) |  |

Decode binary EEPROM image into an ftdi_eeprom structure.

For FT-X devices use AN_201 FT-X MTP memory Configuration to decode.

Parameters

  ftdi | pointer to ftdi_context
  verbose | Decode EEPROM on stdout

Return values

  0 | all fine
  -1 | something went wrong

FIXME: How to pass size? How to handle size field in ftdi_eeprom? FIXME: Strings are malloc'ed here and should be freed somewhere

Definition at line 3411 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_eeprom::channel_a_type, ftdi_eeprom::chip, ftdi_context::eeprom, ftdi_error_return, ftdi_eeprom::in_is_isochronous, ftdi_eeprom::manufacturer, ftdi_eeprom::max_power, MAX_POWER_MILLIAMP_PER_UNIT, ftdi_eeprom::out_is_isochronous, ftdi_eeprom::product, ftdi_eeprom::product_id, ftdi_eeprom::release_number, ftdi_eeprom::remote_wakeup, ftdi_eeprom::self_powered, ftdi_eeprom::serial, ftdi_eeprom::size, ftdi_eeprom::suspend_pull_downs, ftdi_context::type, TYPE_2232C, TYPE_230X, TYPE_AM, TYPE_BM, ftdi_eeprom::usb_version, ftdi_eeprom::use_serial, USE_SERIAL_NUM, ftdi_eeprom::use_usb_version, USE_USB_VERSION_BIT, and ftdi_eeprom::vendor_id.

## ftdi_get_eeprom_value()

int ftdi_get_eeprom_value | ( | struct ftdi_context * | ftdi,
|  | enum ftdi_eeprom_value | value_name,
|  | int * | value
| ) |  |

Get a value from the decoded EEPROM structure

Parameters

  ftdi | pointer to ftdi_context
  value_name | Enum of the value to query
  value | Pointer to store read value

Return values

  0 | all fine
  -1 | Value doesn't exist

Definition at line 3841 of file ftdi.c.

References ftdi_eeprom::cbus_function, CBUS_FUNCTION_0, CBUS_FUNCTION_1, CBUS_FUNCTION_2, CBUS_FUNCTION_3, CBUS_FUNCTION_4, CBUS_FUNCTION_5, CBUS_FUNCTION_6, CBUS_FUNCTION_7, CBUS_FUNCTION_8, CBUS_FUNCTION_9, ftdi_eeprom::channel_a_driver, CHANNEL_A_DRIVER, CHANNEL_A_RS485, ftdi_eeprom::channel_a_rs485enable, ftdi_eeprom::channel_a_type, CHANNEL_A_TYPE, ftdi_eeprom::channel_b_driver, CHANNEL_B_DRIVER, CHANNEL_B_RS485, ftdi_eeprom::channel_b_rs485enable, ftdi_eeprom::channel_b_type, CHANNEL_B_TYPE, ftdi_eeprom::channel_c_driver, CHANNEL_C_DRIVER, CHANNEL_C_RS485, ftdi_eeprom::channel_c_rs485enable, ftdi_eeprom::channel_d_driver, CHANNEL_D_DRIVER, CHANNEL_D_RS485, ftdi_eeprom::channel_d_rs485enable, ftdi_eeprom::chip, CHIP_SIZE, CHIP_TYPE, ftdi_eeprom::clock_polarity, CLOCK_POLARITY, ftdi_eeprom::data_order, DATA_ORDER, ftdi_context::eeprom, ftdi_eeprom::external_oscillator, EXTERNAL_OSCILLATOR, ftdi_eeprom::flow_control, FLOW_CONTROL, ftdi_error_return, ftdi_eeprom::group0_drive, GROUP0_DRIVE, ftdi_eeprom::group0_schmitt, GROUP0_SCHMITT, ftdi_eeprom::group0_slew, GROUP0_SLEW, ftdi_eeprom::group1_drive, GROUP1_DRIVE, ftdi_eeprom::group1_schmitt, GROUP1_SCHMITT, ftdi_eeprom::group1_slew, GROUP1_SLEW, ftdi_eeprom::group2_drive, GROUP2_DRIVE, ftdi_eeprom::group2_schmitt, GROUP2_SCHMITT, ftdi_eeprom::group2_slew, GROUP2_SLEW, ftdi_eeprom::group3_drive, GROUP3_DRIVE, ftdi_eeprom::group3_schmitt, GROUP3_SCHMITT, ftdi_eeprom::group3_slew, GROUP3_SLEW, ftdi_eeprom::high_current, HIGH_CURRENT, ftdi_eeprom::high_current_a, HIGH_CURRENT_A, ftdi_eeprom::high_current_b, HIGH_CURRENT_B, ftdi_eeprom::in_is_isochronous, IN_IS_ISOCHRONOUS, ftdi_eeprom::invert, INVERT, ftdi_eeprom::is_not_pnp, IS_NOT_PNP, ftdi_eeprom::max_power, MAX_POWER, ftdi_eeprom::out_is_isochronous, OUT_IS_ISOCHRONOUS, POWER_SAVE, ftdi_eeprom::powersave, ftdi_eeprom::product_id, PRODUCT_ID, ftdi_eeprom::release_number, RELEASE_NUMBER, ftdi_eeprom::remote_wakeup, REMOTE_WAKEUP, ftdi_eeprom::self_powered, SELF_POWERED, ftdi_eeprom::size, ftdi_eeprom::suspend_dbus7, SUSPEND_DBUS7, ftdi_eeprom::suspend_pull_downs, SUSPEND_PULL_DOWNS, ftdi_eeprom::usb_version, USB_VERSION, ftdi_eeprom::use_serial, USE_SERIAL, ftdi_eeprom::use_usb_version, USE_USB_VERSION, ftdi_eeprom::vendor_id, and VENDOR_ID.

## ftdi_set_eeprom_value()

int ftdi_set_eeprom_value | ( | struct ftdi_context * | ftdi,
|  | enum ftdi_eeprom_value | value_name,
|  | int | value
| ) |  |

Set a value in the decoded EEPROM Structure No parameter checking is performed

Parameters

  ftdi | pointer to ftdi_context
  value_name | Enum of the value to set
  value | to set

Return values

  0 | all fine
  -1 | Value doesn't exist
  -2 | Value not user settable

Definition at line 4034 of file ftdi.c.

References ftdi_eeprom::cbus_function, CBUS_FUNCTION_0, CBUS_FUNCTION_1, CBUS_FUNCTION_2, CBUS_FUNCTION_3, CBUS_FUNCTION_4, CBUS_FUNCTION_5, CBUS_FUNCTION_6, CBUS_FUNCTION_7, CBUS_FUNCTION_8, CBUS_FUNCTION_9, ftdi_eeprom::channel_a_driver, CHANNEL_A_DRIVER, CHANNEL_A_RS485, ftdi_eeprom::channel_a_rs485enable, ftdi_eeprom::channel_a_type, CHANNEL_A_TYPE, ftdi_eeprom::channel_b_driver, CHANNEL_B_DRIVER, CHANNEL_B_RS485, ftdi_eeprom::channel_b_rs485enable, ftdi_eeprom::channel_b_type, CHANNEL_B_TYPE, ftdi_eeprom::channel_c_driver, CHANNEL_C_DRIVER, CHANNEL_C_RS485, ftdi_eeprom::channel_c_rs485enable, ftdi_eeprom::channel_d_driver, CHANNEL_D_DRIVER, CHANNEL_D_RS485, ftdi_eeprom::channel_d_rs485enable, ftdi_eeprom::chip, CHIP_SIZE, CHIP_TYPE, ftdi_eeprom::clock_polarity, CLOCK_POLARITY, ftdi_eeprom::data_order, DATA_ORDER, ftdi_context::eeprom, ftdi_eeprom::external_oscillator, EXTERNAL_OSCILLATOR, ftdi_eeprom::flow_control, FLOW_CONTROL, ftdi_error_return, ftdi_eeprom::group0_drive, GROUP0_DRIVE, ftdi_eeprom::group0_schmitt, GROUP0_SCHMITT, ftdi_eeprom::group0_slew, GROUP0_SLEW, ftdi_eeprom::group1_drive, GROUP1_DRIVE, ftdi_eeprom::group1_schmitt, GROUP1_SCHMITT, ftdi_eeprom::group1_slew, GROUP1_SLEW, ftdi_eeprom::group2_drive, GROUP2_DRIVE, ftdi_eeprom::group2_schmitt, GROUP2_SCHMITT, ftdi_eeprom::group2_slew, GROUP2_SLEW, ftdi_eeprom::group3_drive, GROUP3_DRIVE, ftdi_eeprom::group3_schmitt, GROUP3_SCHMITT, ftdi_eeprom::group3_slew, GROUP3_SLEW, ftdi_eeprom::high_current, HIGH_CURRENT, ftdi_eeprom::high_current_a, HIGH_CURRENT_A, ftdi_eeprom::high_current_b, HIGH_CURRENT_B, ftdi_eeprom::in_is_isochronous, IN_IS_ISOCHRONOUS, ftdi_eeprom::initialized_for_connected_device, ftdi_eeprom::invert, INVERT, ftdi_eeprom::is_not_pnp, IS_NOT_PNP, ftdi_eeprom::max_power, MAX_POWER, ftdi_eeprom::out_is_isochronous, OUT_IS_ISOCHRONOUS, POWER_SAVE, ftdi_eeprom::powersave, ftdi_eeprom::product_id, PRODUCT_ID, ftdi_eeprom::release_number, RELEASE_NUMBER, ftdi_eeprom::remote_wakeup, REMOTE_WAKEUP, ftdi_eeprom::self_powered, SELF_POWERED, ftdi_eeprom::suspend_dbus7, SUSPEND_DBUS7, ftdi_eeprom::suspend_pull_downs, SUSPEND_PULL_DOWNS, ftdi_eeprom::usb_version, USB_VERSION, ftdi_eeprom::use_serial, USE_SERIAL, ftdi_eeprom::use_usb_version, USE_USB_VERSION, ftdi_eeprom::user_data_addr, USER_DATA_ADDR, ftdi_eeprom::vendor_id, and VENDOR_ID.

## ftdi_get_eeprom_buf()

int ftdi_get_eeprom_buf | ( | struct ftdi_context * | ftdi,
|  | unsigned char * | buf,
|  | int | size
| ) |  |

Get the read-only buffer to the binary EEPROM content

Parameters

  ftdi | pointer to ftdi_context
  buf | buffer to receive EEPROM content
  size | Size of receiving buffer

Return values

  0 | All fine
  -1 | struct ftdi_contxt or ftdi_eeprom missing
  -2 | Not enough room to store eeprom

Definition at line 4230 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_context::eeprom, ftdi_error_return, FTDI_MAX_EEPROM_SIZE, and ftdi_eeprom::size.

## ftdi_set_eeprom_buf()

int ftdi_set_eeprom_buf | ( | struct ftdi_context * | ftdi,
|  | const unsigned char * | buf,
|  | int | size
| ) |  |

Set the EEPROM content from the user-supplied prefilled buffer

Parameters

  ftdi | pointer to ftdi_context
  buf | buffer to read EEPROM content
  size | Size of buffer

Return values

  0 | All fine
  -1 | struct ftdi_context or ftdi_eeprom or buf missing

Definition at line 4256 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_context::eeprom, ftdi_error_return, FTDI_MAX_EEPROM_SIZE, and ftdi_eeprom::size.

## ftdi_set_eeprom_user_data()

int ftdi_set_eeprom_user_data | ( | struct ftdi_context * | ftdi,
|  | const char * | buf,
|  | int | size
| ) |  |

Set the EEPROM user data content from the user-supplied prefilled buffer

Parameters

  ftdi | pointer to ftdi_context
  buf | buffer to read EEPROM user data content
  size | Size of buffer

Return values

  0 | All fine
  -1 | struct ftdi_context or ftdi_eeprom or buf missing

Definition at line 4279 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_context::eeprom, ftdi_error_return, ftdi_eeprom::size, ftdi_eeprom::user_data, and ftdi_eeprom::user_data_size.

## ftdi_read_eeprom_location()

int ftdi_read_eeprom_location | ( | struct ftdi_context * | ftdi,
|  | int | eeprom_addr,
|  | unsigned short * | eeprom_val
| ) |  |

Read eeprom location

Parameters

  ftdi | pointer to ftdi_context
  eeprom_addr | Address of eeprom location to be read
  eeprom_val | Pointer to store read eeprom location

Return values

  0 | all fine
  -1 | read failed
  -2 | USB device unavailable

Definition at line 4300 of file ftdi.c.

References ftdi_eeprom::buf, FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, SIO_READ_EEPROM_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by ftdi_erase_eeprom(), ftdi_write_eeprom_location(), and Ftdi::Eeprom::write().

## ftdi_read_eeprom()

int ftdi_read_eeprom | ( | struct ftdi_context * | ftdi | ) |

Read eeprom

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | read failed
  -2 | USB device unavailable

Definition at line 4324 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_context::eeprom, FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, FTDI_MAX_EEPROM_SIZE, SIO_READ_EEPROM_REQUEST, ftdi_eeprom::size, ftdi_context::type, TYPE_R, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by Ftdi::Eeprom::build().

## ftdi_read_chipid()

int ftdi_read_chipid | ( | struct ftdi_context * | ftdi,
|  | unsigned int * | chipid
| ) |  |

Read the FTDIChip-ID from R-type devices

Parameters

  ftdi | pointer to ftdi_context
  chipid | Pointer to store FTDIChip-ID

Return values

  0 | all fine
  -1 | read failed
  -2 | USB device unavailable

Definition at line 4383 of file ftdi.c.

References FTDI_DEVICE_IN_REQTYPE, ftdi_error_return, SIO_READ_EEPROM_REQUEST, ftdi_context::usb_dev, and ftdi_context::usb_read_timeout.

Referenced by Ftdi::Eeprom::init_defaults().

## ftdi_write_eeprom_location()

int ftdi_write_eeprom_location | ( | struct ftdi_context * | ftdi,
|  | int | eeprom_addr,
|  | unsigned short | eeprom_val
| ) |  |

Write eeprom location

Parameters

  ftdi | pointer to ftdi_context
  eeprom_addr | Address of eeprom location to be written
  eeprom_val | Value to be written

Return values

  0 | all fine
  -1 | write failed
  -2 | USB device unavailable
  -3 | Invalid access to checksum protected area below 0x80
  -4 | Device can't access unprotected area
  -5 | Reading chip type failed

Definition at line 4421 of file ftdi.c.

References FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_read_eeprom_location(), SIO_WRITE_EEPROM_REQUEST, ftdi_context::type, TYPE_2232C, TYPE_2232H, TYPE_232H, TYPE_4232H, TYPE_BM, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Eeprom::read_location().

## ftdi_write_eeprom()

int ftdi_write_eeprom | ( | struct ftdi_context * | ftdi | ) |

Write eeprom

Parameters

  ftdi | pointer to ftdi_context

Return values

  0 | all fine
  -1 | read failed
  -2 | USB device unavailable
  -3 | EEPROM not initialized for the connected device;

Definition at line 4477 of file ftdi.c.

References ftdi_eeprom::buf, ftdi_context::eeprom, FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_poll_modem_status(), ftdi_set_latency_timer(), ftdi_usb_reset(), ftdi_eeprom::initialized_for_connected_device, SIO_WRITE_EEPROM_REQUEST, ftdi_eeprom::size, ftdi_context::type, TYPE_230X, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Eeprom::read().

## ftdi_erase_eeprom()

int ftdi_erase_eeprom | ( | struct ftdi_context * | ftdi | ) |

Definition at line 4532 of file ftdi.c.

References ftdi_eeprom::chip, ftdi_context::eeprom, FTDI_DEVICE_OUT_REQTYPE, ftdi_error_return, ftdi_read_eeprom_location(), MAGIC, SIO_ERASE_EEPROM_REQUEST, SIO_WRITE_EEPROM_REQUEST, ftdi_context::type, TYPE_230X, TYPE_R, ftdi_context::usb_dev, and ftdi_context::usb_write_timeout.

Referenced by Ftdi::Eeprom::write_location().

## ftdi_get_error_string()

const char* ftdi_get_error_string | ( | struct ftdi_context * | ftdi | ) |

Get string representation for last error code

Parameters

  ftdi | pointer to ftdi_context

Return values

  Pointer | to error string

Definition at line 4594 of file ftdi.c.

References ftdi_context::error_str.

Referenced by Ftdi::Context::read_pins().