trabucayre / fixft2232_ecp5evn

Tool to fix FT2232's uart interface configuration for ecp5evn (LFE5UM5G-85F-EVN) board

fixFT2232_ecp5evn

Tool to fix FT2232's uart interface configuration for ecp5evn (LFE5UM5G-85F-EVN) and CrossLink-NX EVN (LIFCL-40-EVN) boards.

An SPI flash is used by FT2232 to store device configuration. By default, with the ecp5 evn board, FT2232 interface B used as UART is configured in FIFO mode. With this behavior it's not possible to communicate with the FPGA.

This tool as for goal to update EEPROM content, with correct mode, slew rate and drive.

Note: libftdi1 has a limited ftdi_eeprom_build function, the user area space not take into account eeprom size, so this repository provides an adapted implementation dedicated to 256 Bytes EEPROM.

The new FT2232 behavior has been tested with soc_ecp5_evn and fix issue RISCV example not working

compile

This application uses libftdi1, so this library must be installed (and, depending of the distribution, headers too)

apt-get install libftdi1-2 libftdi1-dev

and if not already done, install pkg-config, make and gcc.

To build the app:

$ make

Usage

./fixFT2232_ecp5evn -v vid -p pid [-n]
   -v default: 0x403
   -p default: 0x6010
   -n to not write into FTDI EEPROM

fixft2232_ecp5evn's Issues

Rename repo - this is applicable to more than ecp5evn !

So I got a new Lattice CrossLink-NX EVN. Used this tool to fix the default configuration of FT2232H for openFPGALoader.

While I am not sure if the repo can be renamed (can it?), I believe the README can be improved. I can submit a pull request.