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davebryan19
davebryan19
Associate
January 22, 2008
Question

Dual ADC mode

  • January 22, 2008
  • 2 replies
  • 828 views
Posted on January 22, 2008 at 14:34

Dual ADC mode

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    2 replies

    davebryan19
    davebryan19Author
    Associate
    May 17, 2011
    Posted on May 17, 2011 at 12:22

    Hi,

    I'm planning to use a STM32F103 in dual ADC mode. I want to perform simultaneous sampling on 2 analogue signals i.e. a separate ADC assigned to each signal. I have an external trigger which will initiate a 128 sample burst capture at a pre-programmed sample rate (up to 200kHz) & save the results to memory.

    As far as I can tell the DMA controller can only work with a single ADC channel. So it seems I'll have to do this under software control or am I missing something?

    Thanks

    Dave

    davebryan19
    davebryan19Author
    Associate
    May 17, 2011
    Posted on May 17, 2011 at 12:22

    In case anyone else was wondering, after reading the datasheet more carefully it says that that ADC1 & ADC2 results are saved as 32bits to the ADC1_DR which can be copied by a single DMA transfer

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