TMS570LC4357: Transferring data from shared RAM to EMIF via DMA

Hi,

I am trying to transfer data from a buffer located in shared RAM to an EMIF address using DMA. Based on the example from (https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1046746/tms570lc4357-how-to-read-and-write-data-from-nvsram-using-the-emif-interface-via-dma) I tried to create my own class that initializes the DMA with the following function:

constexpr uint16_t Minor_frame_length {2048}; 
constexpr uint8_t  Major_frame_length {1};

// /**********************
// * Buffer Instantiation
// ***********************/
#pragma SET_DATA_SECTION(".sharedRAM")
    uint32_t major_frame_buffer[Minor_frame_length*Major_frame_length];
#pragma SET_DATA_SECTION()


void init(){

  // Set EMIF Addr
  this->EMIF_addr = (uint32_t*) (EMIF_Registers::EMIF_1_ADDR + EMIF_Registers::START_ADDR);   
  
  // Set DMA Contro packet   
  this->dma_control_packet.SADD = ((uintptr_t) &this->buffer[16]); /* source address, reading from shared RAM */
  this->dma_control_packet.DADD = (uintptr_t)this->EMIF_addr;  /* dst address, writing to EMIF addr of BRAM */
  this->dma_control_packet.ELCNT = 1; /* element count */
  this->dma_control_packet.FRCNT = 1; /* frame count */
  this->dma_control_packet.CHCTRL = 0; /*  Next channel to be triggered */
  this->dma_control_packet.ELDOFFSET = 0; /* element destination offset */
  this->dma_control_packet.ELSOFFSET = 0;
  this->dma_control_packet.FRDOFFSET = 0; /* frame destination offset   */
  this->dma_control_packet.FRSOFFSET = 0; /* frame source offset   */
  this->dma_control_packet.PORTASGN = PORTA_READ_PORTA_WRITE;  /* Read from shared RAM and write to EMIF */
  this->dma_control_packet.RDSIZE = ACCESS_16_BIT;
  this->dma_control_packet.WRSIZE = ACCESS_16_BIT;
  this->dma_control_packet.TTYPE = FRAME_TRANSFER; /* transfer type            */
  this->dma_control_packet.ADDMODEWR = ADDR_INC1; /* address mode write       */
  this->dma_control_packet.ADDMODERD = ADDR_FIXED; /* address mode read         */
  this->dma_control_packet.AUTOINIT = AUTOINIT_ON; /* autoinit                 */

  dmaSetCtrlPacket(this->dmaChannel, this->dma_control_packet);  
  
  // Set interrupt handlers
  dmaInterrupt_t dma_interrupt = BTC;
  dmaIrqHandler.setIrqHandler((void*) &dma_interrupt, this->dmaChannel, this);
  dmaEnableInterrupt(this->dmaChannel, dma_interrupt, DMA_INTA);
  dmaSetChEnable(this->dmaChannel, DMA_SW);
}

I tried just transferring a 16bits from one address to another one (Element count = 1, Frame Count = 1), but it didn't work. The data in the EMIF address remains the same (0). Also, when I increase the number of Frame Count, let's say to 2, I stop receiving the BTC interrupt from the DMA. When I debug, I can see that the DMA is getting the BTC interrupt and the destination address of the FIFO A (register 190) keeps moving as well as the ChnTrCnt. However, the change is not reflected in memory. I have tried changing several parameters like the read and write size, element count, frame count and transfer type but I have not managed to succeed on getting some data into the EMIF register.

I would appreciate any help or clue on how to fix this.

Thanks for your help.