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標題: 【已經解決，謝謝】CC2530 uart0 DMA通道1數據傳輸問題，200元酬謝 [打印本頁]

作者: sihhepl 時間: 2017-6-13 10:29
標題: 【已經解決，謝謝】CC2530 uart0 DMA通道1數據傳輸問題，200元酬謝
本帖最后由 sihhepl 于 2017-6-19 22:17 編輯

200元酬謝，請各位大俠幫我調下程序，謝謝啦！我的QQ：79422195，請標注“51黑DMA”

我使用cc2530的DMA channel 1將接收到的串口（uart0）數據存儲在uartRxBuf內，程序如下。在中斷函數中，根據DMAIRQ的DMAIF1位是否置1來判斷是否傳輸完成DATA_COUNT字節的數據。如果DATA_COUNT為1，則程序沒有問題，接收數據正常，如果DATA_COUNT大于1，則程序不能產生中斷。請各位大俠幫我看下程序，謝謝啦！

#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;

}

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