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MSPM0L2228: Trigger ADC "selected" Channel (choose one and read one channel) to read by Software

Eric Chen
Intellectual 1910 points
Part Number: MSPM0L2228

Tool/software:

Dear expert, 

We do have different sample mode, like single and sequence.

If there are 3 channels ADC, and the customer would like to read the target channel (one channel at a time) by software.

Does our device able to do that with sequence mode, or we can do it with single mode and change the channel during runtime?

Can you show me how to do that? 

Such as which function should I call or setup.

Best Regards,

Eric Chen

  • +1
    TI__Genius 9810 points

    Hi Eric,

    Do you mean that you want to read three different channels one by one. And use software as trigger.

    Yes you can use sequence. You can add 3 ADC conversion, and set the trigger mode to 'Valid trigger will step to next memory conversion register'

    Then you can use DL_ADC12_startConversion(ADC12_0_INST) to trigger ADC sample in the code.

    Thanks,

  • 0 in reply to Yuhao Zhao
    TI__Intellectual 1910 points

    Dear Yuhao, 

    According to what you mean, our ADC will only sample "one channel" at every DL_ADC12_startConversion(ADC12_0_INST),

    then switch to another channel and wait for another DL_ADC12_startConversion(ADC12_0_INST).

    After sending the second DL_ADC12_startConversion(ADC12_0_INST), I will get the second channel of ADC.

    Is my understanding correct?

    Best Regards,

    Eric Chen

  • +1 in reply to Eric Chen
    TI__Genius 9810 points

    Yes, you are right. Because the trigger mode of 'Valid trigger will step to next memory conversion register', 3 conversions will be triggered one by one,