FaustoThere should be some data, not all FFs so I think there is a problem with I2C address for the 8-pin EEPROM chip which stores the VID and PID.
I think perhaps your board has a ATMEL AT24c128 (16KBbytes) with 2 byte address whereas my example command was for a 256byte EEPROM which uses a one byte address.
Try: fx2tool -B -d 16c0:296d read_eeprom -W 2 0 256 But this may not work depending on your PCB EEPROM connections. fx2tool will use i2c device address 0x51 (see reference [1] below) Address 0x51 means the pins on your eeprom chip [2] need to be: Pin1 = 1 (connected to pin 8) Pin2 = 0 (or floating/unconnected) Pin3 = 0 (or floating/unconnected) [1] Line 134 in: https://github.com/whitequark/libfx2/blob/master/firmware/boot-cypress/main.c [2] EEPROM datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8734-SEEPROM-AT24C128C-Datasheet.pdf Rgds, Kevin On 2021-01-11 00:47, Fausto Barbosa wrote:
Thank you Arno and Arsenijs. python3 did the trick. Now I run: $ fx2tool -B -d 16c0:296d read_eeprom -W 1 0 256 and get ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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