Where can I find some instructions on how to modify the FPGA firmware?
I would love to see this as well, since with our testing neither i2c nor SPI work at all, so it would be great to be able to actually use this chip.
They said earlier the FPGA is not open for programming: https://forum.up-community.org/discussion/2936/customize-fpga-code
Delicode Ltd - https://www.delicode.com/
SPI is working fine for me, btw. Have never tested I2C, though.