ADI CCES ADSPI2156X UART DMA模式中，获取当前存到第几个数CurrXCount， 重新从头开始接收StartAddr

关键的一些寄存器

关键的寄存器 pUARTDstDMARegs

typedef struct
{
    uint32_t                         nTmrDevNum;         /* Timer assosiated to the selected UART for Autobaud */

    ADI_UART_TypeDef *const          pUARTRegs;          /* Pointer to base address of UART Memory Mapped Registers */

    ADI_PDMA_REGS *const             pUARTSrcDMARegs;    /* Pointer to base address of UART Source DMA channel */

    ADI_PDMA_REGS *const             pUARTDstDMARegs;    /* Pointer to base address of UART Destination DMA channel */

    uint32_t                         TxIntID;            /* Tx DMA Interrupt ID */

    uint32_t                         RxIntID;            /* Rx DMA Interrupt ID */

    uint32_t                         StatusIntID;        /* Status Interrupt ID */

    uint32_t                         TxDMAErrorIntID;    /* Tx DMA Error Interrupt ID */

    uint32_t                         RxDMAErrorIntID;    /* Rx DMA Error Interrupt ID */

    ADI_UART_DEVICE                 *pDevice;            /* Pointer to UART device instance data */

} ADI_UART_INFO;

CurrXCount

typedef volatile struct
{
    uint32_t   NextDescPtr;    /* Pointer to next Initial Descriptor */
    uint32_t   StartAddr;      /* Start address of current buffer */
    uint32_t   Config;         /* Configuration register */
    uint32_t   XCount;         /* XCOUNT - Inner loop count start value in number of MSIZE data transfers*/
     int32_t   XModify;        /* XMODIFY - Inner loop address increment, in bytes */
    uint32_t   YCount;         /* YCOUNT - Outer loop count start value (2D only), in number of rows*/
     int32_t   YModify;        /* YMODIFY - Outer loop address increment (2D only), in bytes*/
    uint32_t   Padding0;       /* padding */
    uint32_t   Padding1;       /* padding */
    uint32_t   CurrDescPtr;    /* Current Descriptor Pointer */
    uint32_t   PrevDescPtr;    /* Previous Initial Descriptor Pointer */
    uint32_t   CurrAddr;       /* Current Address */
    uint32_t   Status;         /* Status Register */
    uint32_t   CurrXCount;     /* Current XCOUNT */
    uint32_t   CurrYCount;     /* Current YCOUNT */
} ADI_PDMA_REGS;

看当前收到了多少个bytes,
ADI_PDMA_REGS.CurrXCount

自定义函数 adi_uart_Reset_dma_regiseter

void adi_uart_Reset_dma_regiseter(void* pInfo){

	ADI_UART_INFO * pinfo2 = (ADI_UART_INFO *)pInfo;

//	adi_pdma_ResetRegs(pinfo2->pUARTDstDMARegs);
	ADI_PDMA_REGS *pReg =pinfo2->pUARTDstDMARegs;
//    pReg->Config        = 0u;
//    pReg->NextDescPtr   = 0u;

//    pReg->XCount        = 0u;
//    pReg->XModify       = 0;
//    pReg->YCount        = 0u;
//    pReg->YModify       = 0;
//    pReg->Status        = ADI_PDMA_CLEAR_INTERRUPTS; /* Clear any pending interrupts */
//    pReg->CurrDescPtr   = 0u;
//    pReg->CurrXCount=0u;
    printf("pReg->StartAddr %p\n",pReg->StartAddr);
    printf("pReg->CurrXCount %d\n",pReg->CurrXCount);
    printf("pReg->CurrAddr %p\n",pReg->CurrAddr);
//    CurrAddr
    pReg->StartAddr     = 0u;

}

前提是接收完成，但是没有到达dma 触发个数的时候，或者想查看当前接收到哪里的时候，查看 CurrAddr 寄存器