CC2530 uart0 DMA通道1数据传输问题, 悬赏200元

sihhepl

CC2530 uart0 DMA通道1数据传输问题, 悬赏200元 [复制链接]

悬赏200元，请各位大侠帮我调下程序，谢谢啦！我的QQ：79422195，请标注“电子工程世界DMA”

我使用cc2530的DMA channel 1将接收到的串口（uart0）数据存储在uartRxBuf内，程序如下。在中断函数中，根据DMAIRQ的DMAIF1位是否置1来判断是否传输完成DATA_COUNT字节的数据。如果DATA_COUNT为1，则程序没有问题，接收数据正常，如果DATA_COUNT大于1，则程序不能产生中断。

#define HAL_URX0_DMA_CH        1

#define DATA_COUNT              10

uint8 uartRxBuf[15] = {0};

void HalDma_uart( void )

{

    halDMADesc_t *ch;

    ch = HAL_DMA_GET_DESC1234(HAL_URX0_DMA_CH)

    ch->srcAddrH = HI_UINT16(&X_U0DBUF);

    ch->srcAddrL = LO_UINT16(&X_U0DBUF);

    ch->dstAddrH = HI_UINT16(uartRxBuf);

    ch->dstAddrL = LO_UINT16(uartRxBuf);

    ch->vLen     = 0x00;// Use fixed length DMA transfercount

    ch->lenH     = HI_UINT16(DATA_COUNT);

    ch->lenL     = LO_UINT16(DATA_COUNT);

    ch->wordSize =HAL_DMA_WORDSIZE_BYTE;// Perform 1-byte transfers

    ch->tMode   =HAL_DMA_TMODE_SINGLE;// Single byte transfer per DMA trigger

    ch->trig     = HAL_DMA_TRIG_URX0;// DMA trigger =USARTx RX complete

    ch->srcInc   = HAL_DMA_SRCINC_0;// Do not incrementsource pointer, points to USART U0BUF register.

    ch->destInc  = HAL_DMA_DSTINC_1;// Increment destinationpointer by 1 byte address after each transfer.

    ch->irqMask  = HAL_DMA_IRQMASK_DISABLE;// Enable DMAinterrupt to the CPU

    ch->m8       = HAL_DMA_M8_USE_8_BITS;// Use all 8bits for transfer count

    ch->priority =HAL_DMA_PRI_HIGH;// DMA memory access has low priority

     /* The DMAconfiguration data structure may reside at any location in

     * unified memoryspace, and the address location is passed to the DMA

     * through DMA1CFGH:DMA1CFGL.

     */

            HAL_DMA_CLEAR_IRQ(HAL_URX0_DMA_CH);
            HAL_DMA_SET_ADDR_DESC1234( ch );

    HAL_DMA_ARM_CH(HAL_URX0_DMA_CH); // Arm DMAchannel 1

    //apply 45 NOP's forloading DMA configuration   

    asm("NOP");asm("NOP");//45clk periods

    //Enable the DMAinterrupt (IEN1.DMAIE = IEN0.EA = 1),

    //and clear potentialpending DMA interrupt requests (IRCON.DMAIF = 0)

    IEN0 |= 0x80;

    IEN1 |= 0x01;

    IRCON &= ~0x02;

    // Enable UARTx RX

    U0CSR |= 0x40;  

}

sihhepl

已经解决，谢谢大家关注！