/****************************接收部分代码*******************************************/
void STM32F_StartDMARecv( INT8U COM_No, INT8U *pStartAddr )
{
	UARTDMAEnable(SOC_Uart_BaseAddr[COM_No], UART_DMA_MODE_1_ENABLE);
	UARTx_RxEDMAPaRAMSetConfig(SOC_Uart_BaseAddr[COM_No], pStartAddr, 63, EdmaUart_RxChaNum[COM_No], 0xFFFF, EdmaUart_RxChaNum[COM_No]);
	EDMA3EnableTransfer(EdmaUart_RxChaNum[COM_No], EDMA3_TRIG_MODE_EVENT);
}

void UARTDMAEnable(unsigned int baseAdd, unsigned int dmaModeFlag)
{
    /* Setting the DMAMODECTL bit in SCR to 1. */
    HWREG(baseAdd + UART_SCR) |= (UART_SCR_DMA_MODE_CTL);

    /* Clearing the DMAMODE2 field in SCR. */
    HWREG(baseAdd + UART_SCR) &= ~(UART_SCR_DMA_MODE_2);

    /* Programming the DMAMODE2 field in SCR. */
    HWREG(baseAdd + UART_SCR) |= ((dmaModeFlag << UART_SCR_DMA_MODE_2_SHIFT) &
                                   UART_SCR_DMA_MODE_2);
}

void UARTx_RxEDMAPaRAMSetConfig(
		unsigned int baseaddr, 
		unsigned char *rxBuffer,
		unsigned int length,
		unsigned int tccNum,
		unsigned short linkAddr,
		unsigned int chNum)
{
	/* Fill the PaRAM Set with transfer specific information */
	paramSet.srcAddr = (unsigned int)baseaddr;
	paramSet.destAddr = (unsigned int)rxBuffer;

	paramSet.aCnt = (unsigned short)1;
	paramSet.bCnt = (unsigned short)length; //paramSet.bCnt = (unsigned short)63; 20171013
	paramSet.cCnt = (unsigned short)1;
	paramSet.destBIdx = (short)1;
	paramSet.destCIdx = (short)1;

	paramSet.srcBIdx = (short)0;
	paramSet.srcCIdx = (short)0;

	paramSet.linkAddr = (unsigned short)linkAddr;
	paramSet.bCntReload = (unsigned short)0;

	/* OPT PaRAM Entries. */
	paramSet.opt = (unsigned int)0x0;

	/* Source and Destination addressing modes are Incremental. */

	/* Enable AB Synchronized Transfer. */
	paramSet.opt |= (1 << EDMA3CC_OPT_SYNCDIM_SHIFT);

	/* Setting the Transfer Complete Code(TCC). */
	paramSet.opt |= ((tccNum << EDMA3CC_OPT_TCC_SHIFT) & EDMA3CC_OPT_TCC);

	/* Enabling the Completion Interrupt. */
	paramSet.opt |= (1 << EDMA3CC_OPT_TCINTEN_SHIFT);

	/* Now write the PaRAM Set */
	EDMA3SetPaRAM(chNum, &paramSet);

}

/****************************发送部分代码*******************************************/
void StartDMASend( INT8U COM_No, INT8U *pDMATransStart, INT16U DMATransNum )
{
	if(COM_No==2)  
	{
		UARTDMAEnable(SOC_UART_3_REGS, UART_DMA_MODE_1_ENABLE);
		UART3TxEDMAPaRAMSetConfig(pDMATransStart,
								DMATransNum,//numByteChunks * txBytesPerEvent,
								EDMA3_CHA_UART3_TX_Direct,
								 EDMA3CC_OPT(2),
								 EDMA3_CHA_UART3_TX_Direct);
		TxDummyPaRAMConfEnable(2);
		EDMA3SetEvt( EDMA3_CHA_UART3_TX_Direct );
		EDMA3EnableTransfer(EDMA3_CHA_UART3_TX_Direct,EDMA3_TRIG_MODE_EVENT);
		
	}
}

void UART3TxEDMAPaRAMSetConfig(unsigned char *txBuffer,
                                     unsigned int length,
                                     unsigned int tccNum,
                                     unsigned short linkAddr,
                                     unsigned int chNum)
{
    EDMA3CCPaRAMEntry paramSet;

    /* Fill the PaRAM Set with transfer specific information */
    paramSet.srcAddr = (unsigned int) txBuffer;
    paramSet.destAddr = (unsigned int)SOC_UART_3_REGS;

    paramSet.aCnt = (unsigned short)1;
    paramSet.bCnt = (unsigned short)length;
    paramSet.cCnt = (unsigned short)1;
    paramSet.srcBIdx = (short)1;
    paramSet.srcCIdx = (short)1;

    /* The destination indexes should not increment since it is a h/w register. */
    paramSet.destBIdx = (short)0;
    paramSet.destCIdx = (short)0;

    paramSet.linkAddr = (unsigned short)linkAddr;
    paramSet.bCntReload = (unsigned short)0;

    /* OPT PaRAM entries. */
    paramSet.opt = (unsigned int)0x0;

    /* Source and Destination addressing modes are Incremental. */

    /* AB Synchronized Transfer. */
//    paramSet.opt |= (1 << EDMA3CC_OPT_SYNCDIM_SHIFT);

    /* Setting the Transfer Complete Code(TCC). */
    paramSet.opt |= ((tccNum << EDMA3CC_OPT_TCC_SHIFT) & EDMA3CC_OPT_TCC);

    /* Enabling the Completion Interrupt. */
    paramSet.opt |= (1 << EDMA3CC_OPT_TCINTEN_SHIFT);

    /* Now write the PaRAM Set */
    EDMA3SetPaRAM(chNum, &paramSet);
}