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Altera_Forum
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10 years ago

Cannot Program Wm8731 audio codec using I2C in DE1-SOC dev kit

Hello Alter Gurus; I am in need of your help. I am trying to configure the settings of WM8731 audio codec found in Altera DE1-SOC using I2C and every try that i made ends up unsuccessful. I do ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Are you running anything on the HPS? I assume you're not controlling the I2C multiplexer incorrectly? FPGA fabric has control by default.

Try proving your rtl another way. Can you talk to the Video Decoder? The problem with the WM8731 is it's a write only device. So, you can only indirectly confirm it's responding as you want. At least you can read from the Video Decoder. Can you validate your code that way? Read the device identifier from the video decoder(device address: 0x40), register 0x11. You should read 0x1C.

Cheers,

Alex