AWR1642BOOST: questions related to DMA control

Shiqing Zhang

Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642

    config.channelId = chId;
    config.channelType = (uint8_t)EDMA3_CHANNEL_TYPE_DMA;
    config.paramId = chId;
    config.eventQueueId = eventQueueId;

config.paramSetConfig.sourceAddress = (uint32_t) srcBuff;
config.paramSetConfig.destinationAddress = (uint32_t) dstBuff;

    config.paramSetConfig.aCount = sampleLenInBytes;
    config.paramSetConfig.bCount = numRangeBins;
    config.paramSetConfig.cCount = (uint16_t) numRxAnt;
    config.paramSetConfig.bCountReload = 0U;

config.paramSetConfig.sourceBindex = (int16_t) sampleLenInBytes;
config.paramSetConfig.destinationBindex = (int16_t)(numDopplerBins * numTxAnt * numRxAnt * sampleLenInBytes);

config.paramSetConfig.sourceCindex = (int16_t)(numRangeBins * sampleLenInBytes);
config.paramSetConfig.destinationCindex = (int16_t)(numDopplerBins * sampleLenInBytes);

config.paramSetConfig.linkAddress = EDMA_NULL_LINK_ADDRESS;
config.paramSetConfig.transferType = (uint8_t)EDMA3_SYNC_AB;

In awr1642 when transferType is configured as EDMA3_SYNC_AB, the data will be transported a single (bCount Frames of aCount) when it was triggered by a single EDMA_startDmaTransfer call? or Once a single EDMA_startDmaTransfer call will result in cCoun times transfers of (bCount Frames of aCount) data?

I was confused, which one is the correct?

Similiar issue lies in EDMA3_SYNC_A mode.

    config.paramSetConfig.aCount = aCount;
    config.paramSetConfig.bCount = bCount;
    config.paramSetConfig.cCount = 1U;
    config.paramSetConfig.bCountReload = 0U;

config.paramSetConfig.sourceBindex = srcBIdx;
config.paramSetConfig.destinationBindex = dstBIdx;

config.paramSetConfig.sourceCindex = 0U;
config.paramSetConfig.destinationCindex = 0U;

    config.paramSetConfig.linkAddress = EDMA_NULL_LINK_ADDRESS;
    config.paramSetConfig.transferType = (uint8_t)EDMA3_SYNC_A;
    config.paramSetConfig.transferCompletionCode = chId;
    config.paramSetConfig.sourceAddressingMode = (uint8_t) EDMA3_ADDRESSING_MODE_LINEAR;
    config.paramSetConfig.destinationAddressingMode = (uint8_t) EDMA3_ADDRESSING_MODE_LINEAR;

Thanks a lot.

over 7 years ago