TMS320F28388D: Init DMA to Transfer Words from CLB Fifo with CLB Interrupt

Part Number: TMS320F28388D

Hi all!

I think i have a problem with DMA setup.

I use CLB counter0(C0) as shift register and when the C0 receives a 32-bit data, HLC pushes this data to fifo. Then when fifo has 4words(32-bit) HLC triggers an int. This part is working, I debugged and cpu goes interrupt.

I wanted to trigger DMA with this interrupt to write 4 words(32-bit) data in the fifo to a memory at each burst. However, I caouldn't make the code works. I got DMA interrupt at the end of transfer but the data is not transfered to a memory. I am not sure if it is memory access problem or initialization. My init code is below. Can anybody help me about it? That would be appreciated.

cheers,

//
// Defines
//
#define FIFO_LVL    8               // FIFO interrupt level
#define BURST       FIFO_LVL        // Each burst will empty the FIFO
#define TRANSFER    16              // It will take 16 bursts of 8 to transfer
#define SIZE        (TRANSFER * BURST)

uint32_t r2Data[SIZE];                // Receive data buffer

#pragma DATA_SECTION(r2Data, "ramgs1");


void initDMA()
{
    //
    // Initialize DMA
    //
    DMA_initController();


    DMA_configAddresses(DMA_CH4_BASE, r2Data,
                        (uint32_t *)(CLB1_BASE + CLB_DATAEXCH));
    DMA_configBurst(DMA_CH4_BASE, BURST, 1, 1);
    DMA_configTransfer(DMA_CH4_BASE, TRANSFER, 0, 1);
    DMA_configMode(DMA_CH4_BASE, DMA_TRIGGER_CLB1INT, DMA_CFG_ONESHOT_DISABLE |
                   DMA_CFG_CONTINUOUS_DISABLE | DMA_CFG_SIZE_32BIT);

    DMA_enableTrigger(DMA_CH4_BASE);
    DMA_setInterruptMode(DMA_CH4_BASE, DMA_INT_AT_END);
    DMA_enableInterrupt(DMA_CH4_BASE);
}