6678 EDMA3问题

fuming bai

求高手帮助：

最近调试EDMA3，进行数据搬移。但是测试过程中突然发现程序总会开在一个循环判断上，我感觉是edma3的IPR的bit 0没有被置位，也就是没有传输完成中断被探测到。这种情况在我程序里面有时会出现有时又好了，不过现在卡住了。如下为代码：

#include <stdio.h>
#include "csl_edma3.h"
#include "csl_edma3Aux.h"

CSL_TpccRegs* gEDMACC0Regs = (CSL_TpccRegs*)CSL_EDMA0CC_REGS;
CSL_TpccRegs* gEDMACC1Regs = (CSL_TpccRegs*)CSL_EDMA1CC_REGS;
CSL_TpccRegs* gEDMACC2Regs = (CSL_TpccRegs*)CSL_EDMA2CC_REGS;

/* Global Buffers (Source and Destination) for PING-PONG */
Uint8 srcBuff1[512];
Uint8 dstBuff1[512];
CSL_Edma3Handle                 hModule;
CSL_Edma3Obj                    edmaObj;
CSL_Edma3ParamHandle            hParamPing;
//CSL_Edma3ParamHandle            hParamPong;
CSL_Edma3ChannelObj             chObj;
CSL_Edma3CmdIntr                regionIntr;
CSL_Edma3ChannelHandle          hChannel;
CSL_Edma3ParamSetup             myParamSetup;
CSL_Edma3Context                context;
CSL_Edma3ChannelAttr            chAttr;
CSL_Status                      status;

static Int32 edma_ping_pong_xfer_gbl_region ()
{

Uint8 channelNum=0;
Uint8 instNum = 1;

    /* Start the EDMA PING-PONG test over the Global Region. */
    printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d...\n", instNum, channelNum);


    /* Module initialization */
    CSL_edma3Init(&context);


    /* Open the EDMA Module using the provided instance number */
    hModule = CSL_edma3Open(&edmaObj, instNum, NULL, &status);

    /* Channel open */
    chAttr.regionNum = CSL_EDMA3_REGION_GLOBAL;
    chAttr.chaNum    = channelNum;
    hChannel = CSL_edma3ChannelOpen(&chObj, instNum, &chAttr, &status);


    /* Change Channel Default queue setup from 0 to 3 */
    CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_0);

    /* Map the DMA Channel to PARAM Block 2. */
    CSL_edma3MapDMAChannelToParamBlock (hModule, channelNum, 0);

    /* Obtain a handle to parameter set 2 */
    hParamPing = CSL_edma3GetParamHandle(hChannel, 0, &status);


    /* Obtain a handle to parameter set 1 */
//   hParamPong = CSL_edma3GetParamHandle(hChannel, 1, &status);


    /* Setup the parameter entry parameters (Ping buffer) */
//    myParamSetup.option = CSL_EDMA3_OPT_MAKE(CSL_EDMA3_ITCCH_DIS, \
                                             CSL_EDMA3_TCCH_DIS, \
                                             CSL_EDMA3_ITCINT_DIS, \
                                             CSL_EDMA3_TCINT_EN, \
                                             0, CSL_EDMA3_TCC_NORMAL,\
                                             CSL_EDMA3_FIFOWIDTH_NONE, \
                                             CSL_EDMA3_STATIC_DIS, \
                                             CSL_EDMA3_SYNC_A, \
                                             CSL_EDMA3_ADDRMODE_INCR, \
                                             CSL_EDMA3_ADDRMODE_INCR );
    myParamSetup.option = 0x00100008;
myParamSetup.srcAddr = (Uint32)srcBuff1;
myParamSetup.aCntbCnt = 0x00010200;
myParamSetup.dstAddr = (Uint32)dstBuff1;
myParamSetup.srcDstBidx = 0x0;
myParamSetup.linkBcntrld = 0x0000ffff;
myParamSetup.srcDstCidx = 0x0;
myParamSetup.cCnt = 0x00000001;

    /* Ping setup */
    CSL_edma3ParamSetup(hParamPing,&myParamSetup);

    /* Interrupt enable (Bits 0-1) for the global region interrupts */
    regionIntr.region = CSL_EDMA3_REGION_GLOBAL;
    regionIntr.intr   = 0x3;
    regionIntr.intrh = 0x0000;
    CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTR_ENABLE,&regionIntr);

/* Trigger channel */
CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);

    regionIntr.region = CSL_EDMA3_REGION_GLOBAL;
    regionIntr.intr   = 0;
    regionIntr.intrh = 0;

    /* Poll on IPR bit 0 */
    do {
        CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
    } while (!(regionIntr.intr & 0x1));

/* Clear the pending bit */
CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR,&regionIntr);

    /* Close channel */
    CSL_edma3ChannelClose(hChannel);


    /* Close EDMA module */
    CSL_edma3Close(hModule) ;

return 0;

}

void main (void)
{

    Uint32 loopIndex;

    printf ("**************************************************\n");
    printf ("******************* EDMA Testing *****************\n");
    printf ("**************************************************\n");

    for (loopIndex = 0; loopIndex < 512; loopIndex++)
    {
        srcBuff1[loopIndex] = 0xff;

        dstBuff1[loopIndex] = 0;
     }

    edma_ping_pong_xfer_gbl_region ();
    for(loopIndex=0;loopIndex<512;loopIndex++)
    {
      printf("dstBuff1[loopIndex] = %d %d\n",loopIndex,dstBuff1[loopIndex]);

     }
    printf ("**************************************************\n");
    printf ("************* EDMA Testing Successful ************\n");
    printf ("**************************************************\n");

    return;
}

开住的地方在：    /* Poll on IPR bit 0 */
    do {
        CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
    } while (!(regionIntr.intr & 0x1));

哪位遇到过这种情况，求解答！另外想请教下这段代码是什么意思：

   1、 regionIntr.region = CSL_EDMA3_REGION_GLOBAL;
  /2、 regionIntr.intr   = 0;
   /3、regionIntr.intrh = 0;

主要是2和3,。

12 年多前