C6455的EDMA3同步传输大量数据到DDR2，后半部分数据传输失败

用A和AB模式都可以，只是要注意的是ACNT, BCNT, CCNT最大值都不能超过64k。

/* Module initialization */
status = CSL_edma3Init(&context);
if (status != CSL_SOK) {
printf ("Edma module initialization failed\n");
return;
}
//printf("edma interrupt\n");
/* Intc module initialization */
intcContext.eventhandlerRecord = EventHandler;
intcContext.numEvtEntries = 10;
CSL_intcInit(&intcContext);

/* Enable NMIs */
CSL_intcGlobalNmiEnable();

/* Enable global interrupts */
CSL_intcGlobalEnable(&state);

/* Opening a intc handle for edma event */
vectId = CSL_INTC_VECTID_4;
hIntcEdma = CSL_intcOpen (&intcObjEdma, CSL_INTC_EVENTID_EDMA3CC_INT1, \
&vectId , NULL);

/* Edma module open */
hModule = CSL_edma3Open(&edmaObj,CSL_EDMA3,NULL,&status);
if ( (hModule == NULL) || (status != CSL_SOK)) {
printf ("Edma module open failed\n");
return;
}

/* Edma module setup */
dmahwSetup.paramNum = 0;
dmahwSetup.que = CSL_EDMA3_QUE_0;
hwSetup.dmaChaSetup = &dmahwSetup;
hwSetup.qdmaChaSetup = NULL;
status = CSL_edma3HwSetup(hModule,&hwSetup);
if (status != CSL_SOK) {
printf ("Hardware setup failed\n");
CSL_edma3Close (hModule);
return;
}

/* Setup the DRAE masks
* DRAE enable(Bits 0-15) for the shadow region 1.
*/
regionAccess.region = CSL_EDMA3_REGION_1 ;
regionAccess.drae = 0xFFFF ;
regionAccess.draeh = 0x0000 ;
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, \
&regionAccess);
if (status != CSL_SOK) {
printf("Edma region enable command failed\n");
return;
}

/* Channel open */
chAttr.regionNum = CSL_EDMA3_REGION_1;
chAttr.chaNum = CSL_EDMA3_CHA_DSP_EVT;
hChannel = CSL_edma3ChannelOpen(&chObj, CSL_EDMA3, &chAttr, &status);
if ( (hChannel == NULL) || (status != CSL_SOK)) {
printf ("Edma channel open failed\n");
return;
}

/* Get the parameter handle */
hParamBasic = CSL_edma3GetParamHandle(hChannel,0,&status);
if (hParamBasic == NULL) {
printf("Edma get param handle failed\n");
return;
}
myParamSetup.option = CSL_EDMA3_OPT_MAKE(CSL_EDMA3_ITCCH_DIS, \
CSL_EDMA3_TCCH_DIS, \
CSL_EDMA3_ITCINT_DIS, \
CSL_EDMA3_TCINT_EN,\
1,CSL_EDMA3_TCC_NORMAL,\
CSL_EDMA3_FIFOWIDTH_32BIT, \
CSL_EDMA3_STATIC_DIS, \
CSL_EDMA3_SYNC_A, \
CSL_EDMA3_ADDRMODE_INCR, \
CSL_EDMA3_ADDRMODE_INCR);
myParamSetup.srcAddr = (Uint32)srcBuff;
myParamSetup.aCntbCnt = CSL_EDMA3_CNT_MAKE(8000*4,4);
myParamSetup.dstAddr = (Uint32)dstBuff4;
myParamSetup.srcDstBidx = CSL_EDMA3_BIDX_MAKE(0,0);
myParamSetup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE (CSL_EDMA3_LINK_NULL,
1);
myParamSetup.srcDstCidx = CSL_EDMA3_CIDX_MAKE(0,0);
myParamSetup.cCnt = 1;
status = CSL_edma3ParamSetup(hParamBasic,&myParamSetup);
if (status != CSL_SOK) {
printf ("Edma param setup failed\n");
return;
}

/* Association of an EDMA event handler with the INTC routine */
EventRecord.handler = &eventEdmaHandler;
EventRecord.arg = (void*)(hModule);
CSL_intcPlugEventHandler(hIntcEdma,&EventRecord);

/* Enabling event edma */
CSL_intcHwControl(hIntcEdma,CSL_INTC_CMD_EVTENABLE,NULL);

/* Hook up the EDMA event with an completion code function handler */
EdmaEventHook(1, tcc1Fxn);

/* Enable interrupts */
regionIntr.region = CSL_EDMA3_REGION_1 ;
regionIntr.intr = 0x2 ;
regionIntr.intrh = 0x0 ;
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTR_ENABLE,&regionIntr);
if (status != CSL_SOK) {
printf ("Edma interrupt enable command failed\n");
return;
}
/* Manually trigger the channel */
status = CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);
if (status != CSL_SOK) {
printf ("Edma channel set command failed\n");
return;
}
/* Wait for completion */
while (!intFlag);
/* Disable the region 1 access */
regionAccess.region = CSL_EDMA3_REGION_1 ;
regionAccess.drae = 0xFFFF ;
regionAccess.draeh = 0x0000 ;
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_DISABLE, \
&regionAccess);

运行上述代码一直卡在 while (!intFlag); 上等待传输完成中断触发，请问是什么原因？