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Hello Everyone,
I had a problem with ADC inside Audio Codec inside DE 2 board. I have power down every other components inside Audio Codec in Register R6 except ADC. But I get something like this in the signal tap. I have attached a screenshot in the attachment. Should I expect that ADCDAT should output "ZERO" if nothing is powered on? I am confused about the output from AUD_ADCDAT. I attached some code for I2C controller for Audio Codec here:always @(posedge END) begin
// ROM= 16'h1e00;
ROM= 16'h0c0b; //power down
ROM= 16'h0ec2; //master
ROM= 16'h0814; //sound select -- make it MIC -> ADC -> DAC -> LinOut
ROM= 16'h1000; //mclk
ROM= 16'h0017; //
ROM= 16'h0217; //
ROM= {8'h04,1'b0,vol}; //
ROM= {8'h06,1'b0,vol}; //sound vol
//ROM= 16'h1e00; //reset
ROM= 16'h1201;//active
DATA_A=ROM;
end
There are just a few changes to Register compared to Altera Provided DE_I2sound sample. Can someone explain why I am having output from AUD_ADCDAT. Any idea is welcome here. Thanks Chen Huang
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bump bump!
need help.- Mark as New
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Hi Chinux,
I wish I could help you but I can't. I had the similar problem like you. I needed some ADC for my design. There is ADCs on ADV7181B chip but they are for video signals especially. I also asked for advice on using ADC on Audio Codec usage but I did not get any real answer. So I gave up. Tell me why you need ADC, for some audio signal or for your particular design? Thank you very much, Bojan
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