MSP430F2618 UCB0 SPI via DMA

Hi,

I have big problems to implement the UCB0 with SPI via DMA. The program runs with UCB0 and SPI without any problem. So I want to implement the DMA.

I don't get any result of the DMA. Maybee someone had the same problem and can help me.

Here is my sourcecode:

void sendFrame(uint8_t *pBuffer, uint16_t size)

{

IFG2 &= ~(UCB0RXIFG | UCB0TXIFG);

DMA1SA = __DMA_ACCESS_REG__ pBuffer;

DMA1DA = __DMA_ACCESS_REG__ &UCB0TXBUF;

DMA1SZ = size;

DMA1CTL = DMADT_0 | DMASBDB | DMASRCINCR1 | DMASRCINCR0;

DMACTL0 |= DMA1TSEL_12;

DMA1CTL |= DMAEN;

UCB0TXBUF = 0xFE;

while((IFG2 & UCB0TXIFG)==0);

}

void readFrame(uint8_t *pBuffer, uint16_t size)

{

IFG2 &= ~(UCB0RXIFG | UCB0TXIFG);

DMA1SA = __DMA_ACCESS_REG__ &UCB0RXBUF;

DMA1DA = __DMA_ACCESS_REG__ pBuffer;

DMA1SZ = size;

DMA1CTL = DMADT_0 |  DMASBDB |  DMADSTINCR1 |  DMADSTINCR0;

DMA1CTL |= DMAEN;

DMA2SA = __DMA_ACCESS_REG__ BLANK;

DMA2DA = __DMA_ACCESS_REG__ &UCB0TXBUF;

DMA2SZ = size - 1;

DMA2CTL = DMADT_0 | DMASBDB;

DMACTL0 |= (DMA1TSEL_12 + DMA2TSEL_12);

DMA2CTL |= DMAEN;

DMA2CTL |= DMAREQ;

UCB0TXBUF = 0xFF;

while((IFG2 & UCB0RXIFG)==0);

}