The ft232r_prog (v1.25) program provides a Linux command-line interface for reconfiguring the FT232R chip, eliminating the need for FTDI's MProg/FTProg (MS-Windows) packages.
This is copy of the code by Marc Lord, http://rtr.ca/ft232r/
The FTDI FT232R is a USB/serial converter chip, compatible with both 3.3V and 5.0V TTL logic, but can also be used as General Purpose I/O (GPIO) device. The code hosted here is primarily in support of the latter: a simple way to control real-world stuff from a Linux box, using the CBUS GPIO capabilities of the chip.
All of this stuff requires the libftdi library, which provides basic interfaces for programming FTDI chips. It also requires the libusb library, for driver-free installation and use of USB devices on Linux.
Once those two prerequisites are in place, the rest of the code here becomes usable.
sudo apt-get install build-essential gcc make libftdi-dev libusb-dev
cd ft232r_prog
make❯ ./ft232r_prog --help
ft232r_prog: version 1.25, by Mark Lord.
Usage: ft232r_prog [<arg> <val>]..
where <arg> must be any of:
--help # (show this help text)
--dump # (dump eeprom settings to stdout))
--verbose # (show debug info and raw eeprom contents)
--save # (save original eeprom contents to file)
--restore # (restore initial eeprom contents from file)
--cbus0 [TxDEN|PwrEn|RxLED|TxLED|TxRxLED|Sleep|Clk48|Clk24|Clk12|Clk6|IO|WR|RD|RxF]
--cbus1 [TxDEN|PwrEn|RxLED|TxLED|TxRxLED|Sleep|Clk48|Clk24|Clk12|Clk6|IO|WR|RD|RxF]
--cbus2 [TxDEN|PwrEn|RxLED|TxLED|TxRxLED|Sleep|Clk48|Clk24|Clk12|Clk6|IO|WR|RD|RxF]
--cbus3 [TxDEN|PwrEn|RxLED|TxLED|TxRxLED|Sleep|Clk48|Clk24|Clk12|Clk6|IO|WR|RD|RxF]
--cbus4 [TxDEN|PwrEn|RxLED|TxLED|TxRxLED|Sleep|Clk48|Clk24|Clk12|Clk6|IO|WR|RD|RxF]
--manufacturer <string> # (new USB manufacturer string)
--product <string> # (new USB product name string)
--old-serial-number <string> # (current serial number of device to be reprogrammed)
--new-serial-number <string> # (new USB serial number string)
--self-powered [on|off] # (self powered)
--max-bus-power <number> # (max bus current in milli-amperes)
--high-current-io [on|off] # (enable high [6mA @ 5V] drive current on CBUS pins)
--suspend-pull-down [on|off] # (force I/O pins into logic low state on suspend)
--old-vid <number> # (current vendor id of device to be reprogrammed, eg. 0x0403)
--old-pid <number> # (current product id of device to be reprogrammed, eg. 0x6001)
--new-vid <number> # (new/custom vendor id to be programmed)
--new-pid <number> # (new/custom product id be programmed)
--invert_txd Inverts the current value of TXD
--invert_rxd Inverts the current value of RXD
--invert_rts Inverts the current value of RTS
--invert_cts Inverts the current value of CTS
--invert_dtr Inverts the current value of DTR
--invert_dsr Inverts the current value of DSR
--invert_dcd Inverts the current value of DCD
--invert_ri Inverts the current value of RIReprogram a FT232 Serial -> USB cable, e.g. P1 Smart Meter Cable, to invert the RXD values:
sudo ./ft232r_prog --save backup.eeprom
sudo ./ft232r_prog --invert_rxd