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Continuous adc conversion at several channel simultaneously with f28069.

mahendra tomar
Prodigy 95 points

can adc conversion done at several channels at a same time with different input signal provided to them using f28069.

can anyone provide sample program regarding this problem...

  • 0
    TI__Guru 60865 points
    Hi Mahendra,

    The ADC can convert at most 2 signals simultaneously (S+H occurring at exactly the same time). However, you can continuously scan sequentially through many channels using different SOCs.

    If you want this to be done periodically, the best way is usually to trigger a series of SOCs using the ePWM time base or a CPU timer. There is an example of this in ControlSUITE called Example_2806xAdcSoc. This is the most common way the ADC is used, and I would recommend this method in most circumstances.

    If you want the conversions to occur continuously at absolutely the fastest speed possible, you can instead use 'ping-pong' sampling method. I don't think there is an example of this in ControlSUITE for F2806x, but you can look at the 'adc_soc_continuous' example from F2807x to get an idea of how this works, or you can search the e2e forums for 'ping-pong' and probably find some code snippets.