FreeCalypso > hg > fc-usbser-tools
view doc/Shipped-EEPROM-configs @ 39:b9ecfa54fe2b
fc-duart28-conf: replace find and check-eeprom with single show command
The original design with separate find and check-eeprom commands
was driven by the assumption that we had to bump off the ftdi_sio driver
in order to read the EEPROM, while a USB device tree check could be done
non-invasively. However, now that we know that we can read the EEPROM
non-invasively too, we can simplify the tool with a single show command.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 10 Sep 2023 19:21:20 +0000 |
| parents | 825d3303b886 |
| children |
line wrap: on
line source
There are a number of ready-made FTDI EEPROM config files shipped with fc-usbser-tools package, intended to serve as inputs to ftee-gen* tools. This article describes these shipped EEPROM configs. duart28c and duart28s ===================== FreeCalypso DUART28 is an FT2232D-based custom hardware adapter produced in year 2020. There are two valid EEPROM configs for this adapter, named DUART28C and DUART28S - see DUART28-EEPROM-config article for further details. ft2232-example ============== This config file is an example EEPROM config for FT2232x chips, valid for both FT2232C/D and FT2232H. It is intended to serve as a starting point for custom FT2232x EEPROM configurations. ft232r-example ============== This config file is an example EEPROM config for FT232R. It is intended to serve as a starting point for custom FT232R EEPROM configs. icestick ======== Lattice iCEstick is a handy FPGA board with an FT2232H USB interface chip, supporting SPI programming via MPSSE on Channel A and UART communication with user logic via FT2232H Channel B. However, instead of programming this FT2232H chip's EEPROM with a distinctive USB VID:PID which Linux kernel ftdi_sio driver can recognize as a JTAG quirk, Lattice ships these boards with blank EEPROMs, causing the usual well-known problems with unquirked ftdi_sio binding. Our supplied EEPROM config named "icestick" is intended as the solution: program it into the EEPROM on your iCEstick board, and the binding of ftdi_sio driver becomes sensible, with a ttyUSB device created only for Channel B. jtag-unbuf ========== This EEPROM config is meant for generic (non-specialized) FT2232D breakout boards used as unbuffered JTAG adapters, as described in this old guide from 2019: https://www.freecalypso.org/hg/freecalypso-hwlab/file/tip/doc/Unbuffered-FT2232x-JTAG mcu-host-bus ============ This EEPROM config is meant for the same generic FT2232D breakout boards used in MCU host bus emulation mode, which takes up both channels and leaves no UART.