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Altera_Forum's avatar
Altera_Forum
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14 years ago

Configuring ADC using FPGA

I am trying to configure an ADC using an FPGA. I can read the default values from the ADC register properly, but I'm unable to write to those registers. The fpga clock is 48 MHz and serial clock ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

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SPI CS is permanently tied low which is valid according to the datasheet.

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Ok. That fact was not mentioned in your post, so I wanted to check.

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The only change between reading and writing is the number of bits sent to the ADC. The ADC is able to decode the address I send it, otherwise I would not read the correct values back.

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Are you sending the right values for the W1/W0 fields?

Cheers,

Dave