PIC32 DMA ADC. Single channel to transfer two ADC buffer

[satyamfifa]

Hey All,

I am using PIC32MX460F512L, I am using ADC in ALT mode to sample two ADC pins and 1 interrupts for 2 conversions. I am thinking of copying the results of 2 conversion into RAM using DMA. Therefore I was wondering if it possible to use a single DMA channel to copy the result of ADC1BUF0 and AD1BUF1 without CPU intervention. I want to know if it is possible and how.

Thanks in advance.
Regards,
Sparsh

[nigelwright7557]

I found the time taken between the samples gave me ample time to put the data into buffers.
I found using the DMA took longer.

[mikerj]

DMA is useful to move large amounts of data around whilst the CPU works on something else.  You still have a service an interrupt when the DMA has completed, and re-set the DMA for the next transfer so like Nigel says it's likely you will increase CPU overhead compared to simply servicing the ADC interrupt.