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adc dma pdb

Question asked by bilel ben elghali on Aug 12, 2015
Latest reply on Aug 13, 2015 by Hui_Ma

hello everybody,

I'm using KV31F256 microcontroller and KSDK 1.2 on IAR Embedded workbench.

Here is my problem i configured dma channel 0 on pdb request and in this transfer i configured ADC0 SC1A register throw a buffer i created so  it can generate a soft trigger to begin adc0 conversion.

In the other hand i configured dma channel 1 on ADC0 COCO request to transfer data from ADC0 RA to a buffer i created.

So regarding to this configuration i expected to have one conversion after each PDB request.

To check this i configured a dma channel1 interrupt and i set then reset a pin to see a pulse at the oscilloscope each time a conversion is complete.

here is my problem i got a continuous train of pulses that are not synchronized with the pdb request so i checked the adc0 and it is not configured in continuous mode so i didn't understand why i didn't have the desired behavior.

Can anyone help me please.

Thanks.

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