Single channel DACs driver for ti based DAC081S101 on iMX8QUADMAX.

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Single channel DACs driver for ti based DAC081S101 on iMX8QUADMAX.

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kasandesh
Contributor II

Hello All,

I am working on a SPI based single channel DAC from ti (DAC081S101). By adding the necessary device tree entries, i was able to get the SPI device up, which has also been tested by a simple loopback test.

However, going forward, want to connect the DAC and measure the output. It is quite confusing in terms of documentation that the lpspi ports cannot be used for this.

Did anyone try integrating this sensor on iMX8QUADMAX target ? 

Also, it would be really helpful to know the driver and device tree configuration.

Best Regards,

Sandesh K A

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2 Replies

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jamesbone
NXP TechSupport
NXP TechSupport

Hello,

IF the SPI driver it is up and running, then you are not configuring correctly the DAC, in order to get the measurement, you are going to have a mistake in how to send the configuration or reading the values from the device,  verify the phase and polarity required by the DAC, and use an oscilloscope to see if the DAC it is answering the request from the i.MX that should work as master.

Have a nice day!

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kasandesh
Contributor II

Thank you for the reply, but could you be more elaborate ? Your answer is kind of confusing for me. 

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