Hi,
I am trying to use the eDMA (for example DMA0) to tranfer CSI data to some specific data buffers in memory instead of using the 2 CSI DMA controllers but is having trouble with the transfer.
I setup the CSI config and eDMA config and transfer as follows
/* Set up the CSI */
CSI_Init(CSI, &csiConfig);
/* Set up the DMA & DMAMux */
DMAMUX_Init(DMAMUX);
DMAMUX_SetSource(DMAMUX, DMA_CSIRX_CHAN, kDmaRequestMuxCSI);
DMAMUX_EnableChannel(DMAMUX, DMA_CSIRX_CHAN);
EDMA_GetDefaultConfig(&edmaConfig);
EDMA_Init(DMA0, &edmaConfig);
EDMA_CreateHandle(&edmaRxHandle, DMA0, DMA_CSIRX_CHAN);
EDMA_SetCallback(&edmaRxHandle, EDMA_Callback, NULL);
/* Prepare and start EDMA transfer */
EDMA_PrepareTransfer(&transferConfig, (void *)CSI_RXFIFO_ADDR, sizeof(uint32_t), (void *)&customBuffer[buff_idx], sizeof(uint32_t), 32, BUFFER_LENGTH,kEDMA_PeripheralToMemory);
assert(EDMA_SubmitTransfer(&edmaRxHandle, &transferConfig) == kStatus_Success);
EDMA_EnableChannelInterrupts(edmaRxHandle.base, edmaRxHandle.channel,
kEDMA_MajorInterruptEnable);
EDMA_StartTransfer(&edmaRxHandle);
/* Enable CSI interrupt and CSI */
CSI_EnableInterrupts(CSI, kCSI_RxFifoFullInterruptEnable );
csiEnable(CSI); // just set the CSI enable bit in CSICR18
As a test, the CSI interface should send an incrementing pattern. However, when I inspect data the data that I received in the custom buffer, I see the custom buffer is filled, but the data is not the incrementing pattern. Instead there are only 2 unique words in the data.
Is something in my EDMA configuration that is set incorrectly?
Thanks,
Stephanie
