AM6442: [AM6442] BCDMA的使用

这是我仿着官方例程mcu_plus_sdk_am64x_08_03_00_18\examples\drivers\udma\udma_memcpy_interrupt\am64x-evm\r5fss0-0_nortos来写的，想把uint32_t srcData = 10的数值通过DMA给uint32_t destData = 0;最后打印出来；程序中DMA的配置App_udmaTrpdInit(chHandle, trpdMem, destBuf, srcBuf, length)和例程的一样，没做任何改变；程序的执行结果DebugP_log("destData = %d\r\n",destData)的输出为destData = 0，没有任何改变；在函数void DMAMemcpy(uint32_t *srcBuf,uint32_t *destBuf,uint32_t length)中我用了断言都没有提示错误；卡位while(!gDataSendFinishFlag)也能出来说明DMA的运行是有到中断的回调函数去更改标志位的，但是我不知道为什么destData 的数值没有改变，麻烦有空帮忙看下，谢谢！

#include <stdio.h>
#include <kernel/dpl/DebugP.h>
#include "ti_drivers_config.h"
#include "ti_drivers_open_close.h"
#include "ti_board_open_close.h"

/*
 * µ±¸ø¶¨Ô´µØÖ·ºÍÄ¿±êµØÖ·ÒÔ¼°³¤¶È
 * ´Ëº¯Êý½«Æô¶¯DMA°áÔËÁ½¸öµØÖ·µÄÊý¾Ý
 */

#define UDMA_TEST_TRPD_SIZE             (UDMA_GET_TRPD_TR15_SIZE(1U))

uint8_t gDataSendFinishFlag = 0;

/**/
uint8_t gUdmaTestTrpdMem[UDMA_TEST_TRPD_SIZE] __attribute__((aligned(UDMA_CACHELINE_ALIGNMENT)));

/*ÉùÃ÷º¯Êý*/
void App_udmaEventCb(Udma_EventHandle eventHandle, uint32_t eventType, void *appData);
static void App_udmaTrpdInit(Udma_ChHandle chHandle,uint8_t *trpdMem, const void *destBuf, const void *srcBuf, uint32_t length);

void DMAMemcpy(uint32_t *srcBuf,uint32_t *destBuf,uint32_t length)
{
    uint32_t        trRespStatus;
    int32_t         retVal = UDMA_SOK;
    uint64_t        pDesc;
    Udma_ChHandle   chHandle;
    uint8_t        *trpdMem = &gUdmaTestTrpdMem[0U];
    uint64_t        trpdMemPhy = (uint64_t) Udma_defaultVirtToPhyFxn(trpdMem, 0U, NULL);

    /*»ñȡͨµÀ²Ù×÷¾ä±ú*/
    chHandle = gConfigUdma0BlkCopyChHandle[0];

    /*ʹÄÜͨµÀ*/
    retVal = Udma_chEnable(chHandle);
    DebugP_assert(UDMA_SOK == retVal);

    /*³õʼ»¯TRÃèÊö·û*/
    App_udmaTrpdInit(chHandle, trpdMem, destBuf, srcBuf, length);

    /*½«ÃèÊö·ûÌá½»¸øͨµÀ¿ªÊ¼Êý¾ÝµÄ´«Êä*/
    retVal = Udma_ringQueueRaw(Udma_chGetFqRingHandle(chHandle), trpdMemPhy);
    DebugP_assert(UDMA_SOK == retVal);

    /*µÈ´ýÊý¾Ý´«ÊäÍê³É£¬»Øµ÷º¯Êý¸ü¸Ä±ê־λ*/
    while(!gDataSendFinishFlag);

    /*½«ÃèÊö·û´Ó»·Öе¯³ö*/
    retVal = Udma_ringDequeueRaw(Udma_chGetCqRingHandle(chHandle), &pDesc);
    DebugP_assert(UDMA_SOK == retVal);

    /*¼ì²âTR»ØӦ״̬*/
    CacheP_inv(trpdMem, UDMA_TEST_TRPD_SIZE, CacheP_TYPE_ALLD);
    trRespStatus = UdmaUtils_getTrpdTr15Response(trpdMem, 1U, 0U);
    DebugP_assert(CSL_UDMAP_TR_RESPONSE_STATUS_COMPLETE == trRespStatus);
}


void empty_main(void *args)
{
    uint32_t srcData = 10;
    uint32_t destData = 0;

    /* Open drivers to open the UART driver for console */
    Drivers_open();
    Board_driversOpen();

    DMAMemcpy(&srcData,&destData,1024);
    while(1){
        DebugP_log("destData = %d\r\n",destData);
    }

    Board_driversClose();
    Drivers_close();
}

/*Êý¾Ý´«ÊäÍê³ÉµÄÖжϻص÷º¯Êý*/
void MyDMACallback(Udma_EventHandle eventHandle, uint32_t eventType, void *appData)
{
    gDataSendFinishFlag = 1;
}

static void App_udmaTrpdInit(Udma_ChHandle chHandle,uint8_t *trpdMem,const void *destBuf,const void *srcBuf,uint32_t length)
{
    CSL_UdmapTR15  *pTr;
    uint32_t        cqRingNum = Udma_chGetCqRingNum(chHandle);

    /* Make TRPD with TR15 TR type */
    UdmaUtils_makeTrpdTr15(trpdMem, 1U, cqRingNum);

    /* Setup TR */
    pTr = UdmaUtils_getTrpdTr15Pointer(trpdMem, 0U);
    pTr->flags    = CSL_FMK(UDMAP_TR_FLAGS_TYPE, CSL_UDMAP_TR_FLAGS_TYPE_4D_BLOCK_MOVE_REPACKING_INDIRECTION);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_STATIC, 0U);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_EOL, CSL_UDMAP_TR_FLAGS_EOL_MATCH_SOL_EOL);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_EVENT_SIZE, CSL_UDMAP_TR_FLAGS_EVENT_SIZE_COMPLETION);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_TRIGGER0, CSL_UDMAP_TR_FLAGS_TRIGGER_NONE);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_TRIGGER0_TYPE, CSL_UDMAP_TR_FLAGS_TRIGGER_TYPE_ALL);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_TRIGGER1, CSL_UDMAP_TR_FLAGS_TRIGGER_NONE);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_TRIGGER1_TYPE, CSL_UDMAP_TR_FLAGS_TRIGGER_TYPE_ALL);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_CMD_ID, 0x25U);  /* This will come back in TR response */
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_SA_INDIRECT, 0U);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_DA_INDIRECT, 0U);
    pTr->flags   |= CSL_FMK(UDMAP_TR_FLAGS_EOP, 1U);
    pTr->icnt0    = length;
    pTr->icnt1    = 1U;
    pTr->icnt2    = 1U;
    pTr->icnt3    = 1U;
    pTr->dim1     = pTr->icnt0;
    pTr->dim2     = (pTr->icnt0 * pTr->icnt1);
    pTr->dim3     = (pTr->icnt0 * pTr->icnt1 * pTr->icnt2);
    pTr->addr     = (uint64_t) Udma_defaultVirtToPhyFxn(srcBuf, 0U, NULL);
    pTr->fmtflags = 0x00000000U;    /* ÏßÐÔÑ°Ö·, 1 byte per elem */
    pTr->dicnt0   = length;
    pTr->dicnt1   = 1U;
    pTr->dicnt2   = 1U;
    pTr->dicnt3   = 1U;
    pTr->ddim1    = pTr->dicnt0;
    pTr->ddim2    = (pTr->dicnt0 * pTr->dicnt1);
    pTr->ddim3    = (pTr->dicnt0 * pTr->dicnt1 * pTr->dicnt2);
    pTr->daddr    = (uint64_t) Udma_defaultVirtToPhyFxn(destBuf, 0U, NULL);

    /* »º´æ»Øд */
    CacheP_wb(trpdMem, UDMA_TEST_TRPD_SIZE, CacheP_TYPE_ALLD);

    return;
}