HoroI2CFPGA

PDF of schematics:

Zipped Altium source files:

Gerber files:

FPGA Verilog file:

Running the I2C testing with a minimal TipTone Arduino:

At the moment, the Arduino is only dealing with SCL and SDA, not _RST or _INT. 

Power comes from USB, which goes out the ribbon cable. 

Assuming the FPGA board is getting its own power, that means pins 1 and 2 should be cut on the ribbon cable, isolating the +5Vs.

The ECO wire is connecting pins 9 and 10 to ground.

Arduino code:

20230126 Here's the full archive of Lattice Diamond project HoroI2CFIFO, last updated 20220801