Pmod AD2 Issue

[Marv]

All:

      I'm having a problem getting my I2C controller to work with the Pmod AD2 using a Genesys2 board.  My waveform looks exactly like the datasheet but I get no response from the ADC.  Is there any FPGA code available that I can use?

[artvvb]

Hey @Marv, Welcome to the Forum!

Yes, there are a couple of old pieces of example code originally written for ISE that should be helpful even these days. Links are in the AD2's resource center: https://digilent.com/reference/pmod/pmodad2/start. Look for "Nexys 3 VHDL Example".

The Pmod AD2 IP core (which may or may not support the version of Vivado you are using) wraps Xilinx's AXI IIC core, if you happen to be using a Microblaze system in the right version, it could be easier to use than rolling a custom core.

Thanks,

Arthur