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Altera_Forum
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13 years ago

DAC with THDB-ADA on DE2-115

Hi there, I'm working with DAC on the daughter board THDB-ADA. The pin assignments are correct, I believe, but the circuit doesn't seem to be working. Here are my waveforms from ModelSim, can so...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

If your FPGA output is q[7:0], and signal before DAC is DAC_DA[13:0], try this----------

DAC_DA[13:0]={1'b0, ~q[7], q[6:0], 5'b00000}

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I contect with technical support of THDB-ADA board. They said this board does not support DC output. I think maybe that means, if you want to get a rectangle like waveform, the shape of that will degrade or change.