TI中文支持网现在遇到的问题是，使用edma3的通道0将通过EMIF接口可以将ram的数据搬移到L2中，但是当我改变通道时就不行了，我参考了其它人的代码，但是还会不行。我把我的edma3的设置代码贴上来，谁能帮我看看，非常感谢！芯片是6455的。
#include <csl.h>
#include <stdio.h>
#include <csl_edma3.h>
#include "csl_error.h"
#define EDMA_IPR *(volatile int*)(0x02A01068)//interupt
//#define EVT_CLR1 (*(volatile int*)(0x01800044)
/*****************************************************************************/
CSL_Edma3Handle hModule;
// CSL_Edma3Handle hModule1
CSL_Edma3HwSetup hwSetup;
CSL_Edma3Obj edmaObj;
CSL_Edma3ParamHandle hParamBasic;
CSL_Edma3ParamHandle hParamBasic1;
CSL_Edma3ChannelObj chObj;
CSL_Edma3ChannelObj chObj1;
CSL_Edma3CmdIntr regionIntr;
CSL_Edma3CmdDrae regionAccess;
CSL_Edma3ChannelHandle hChannel;
CSL_Edma3ChannelHandle hChannel1;
CSL_Edma3ParamSetup myParamSetup;
CSL_Edma3ParamSetup myParamSetup1;
CSL_Edma3Context context;
CSL_Edma3ChannelAttr chAttr;
CSL_Status status;
CSL_Status status1;
CSL_Status status2;
Uint16 paramNum=14;
// CSL_Edma3HwDmaChannelSetup dmahwSetup; CSL_Edma3HwDmaChannelSetup dmahwSetup[CSL_EDMA3_NUM_DMACH] =
CSL_EDMA3_DMACHANNELSETUP_DEFAULT;
void initial_Edma3(void)
{
status = CSL_edma3Init(&context);
if (status != CSL_SOK) {
printf ("Edma module initialization failed\n"); return;
}
/* Module level open */
hModule = CSL_edma3Open(&edmaObj,CSL_EDMA3,NULL,&status);
if ( (hModule == NULL) || (status != CSL_SOK)) {
printf ("Edma module open failed\n"); return;
}
/* Module setup */
/// dmahwSetup[8 ].paramNum = 8;
dmahwSetup[CSL_EDMA3_CHA_3].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;
} /* DRAE enable(Bits 0-15) for the shadow region 5 */
regionAccess.region = CSL_EDMA3_REGION_5;
regionAccess.drae = 0xFFFF ; regionAccess.draeh = 0x0 ;
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, \
®ionAccess); if (status != CSL_SOK) {
printf ("Edma region enable command failed\n");
return;
}
/* Channel 3 open in context of shadow region 5 */
chAttr.regionNum = CSL_EDMA3_REGION_5;
chAttr.chaNum = CSL_EDMA3_CHA_3;
hChannel = CSL_edma3ChannelOpen(&chObj, CSL_EDMA3, &chAttr, &status); if ((hChannel == NULL) || (status != CSL_SOK)) {
printf ("Edma channel open failed\n");
return;
}
/* Get the PaRAM number associated with this channel */
status = CSL_edma3GetHwChannelSetupParam(hChannel,¶mNum);
if (status1 != CSL_SOK) {
// Sys_Count ++; return;
}
/* Obtain a handle to parameter set 3 ,3 通道对应 14 param*/
hParamBasic = CSL_edma3GetParamHandle(hChannel, paramNum, &status);
if (hParamBasic == NULL) {
printf ("Edma get param handle for param entry 0 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,\
CSL_EDMA3_CHA_3, \
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.srcAddr = (Uint32)(src); myParamSetup.aCntbCnt = CSL_EDMA3_CNT_MAKE(acnt,bcnt); myParamSetup.dstAddr = (Uint32)dst; myParamSetup.srcDstBidx = CSL_EDMA3_BIDX_MAKE(0,0); myParamSetup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE(CSL_EDMA3_LINK_NULL,0); myParamSetup.srcDstCidx = CSL_EDMA3_CIDX_MAKE(0,0); myParamSetup.cCnt = 1;
status = CSL_edma3ParamSetup(hParamBasic,&myParamSetup);
if (status != CSL_SOK) {
printf("Edma parameter entry setup is failed\n");
return;
}
/* Enable channel 3 */
status = CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_ENABLE, NULL);
if (status != CSL_SOK) {
printf("Edma channel enable command for channel 3 is 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 is failed\n");
return;
}
regionIntr.region = CSL_EDMA3_REGION_5;
regionIntr.intr = 0x8;
regionIntr.intrh = 0;
do {
/* Poll on interrupt bit 0 */
CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,®ionIntr);
} while (!(regionIntr.intr & 0x8));
/* Clear interrupt bit 0 */
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR, \
®ionIntr); if (status != CSL_SOK) {
printf("Edma clear interrupt bit 0 command is failed\n");
return;
}
/* Channel close */
status = CSL_edma3ChannelClose(hChannel);
if (status != CSL_SOK) {
printf ("Edma channle close failed\n");
return;
}
/* Edma module close */
status = CSL_edma3Close(hModule); if (status != CSL_SOK) {
printf ("Edma module close failed\n");
return;
}
return;
}
字体为红色的部分的参数是我改后的，但是这样不行，我不知道原因，希望能得到帮助，非常感谢！
Hong Lan：
代码修改不完全。
/* Get the PaRAM number associated with this channel */ status = CSL_edma3GetHwChannelSetupParam(hChannel,¶mNum); if (status1 != CSL_SOK) { // Sys_Count ++; return; }
这里调用函数的返回值赋给了status ，但是下面判断却是用status1 ，导致程序return。这里又没有错误打印。
实际上只要单步跟踪一下就能发现。或者和未修改的代码比较一下也能发现。
另外，要确保你的bcnt=1。注意你的EDMA是A_SYNC,每次触发只会copy ACNT个字节。但是你只使能了TCINT，没有使能ITCINT，也就是说当bcnt不等于1时，必须copy完 bcnt * acnt的字节才会有IPR。
还有一个小问题是你虽然给paraNum赋了14，但是函数status = CSL_edma3GetHwChannelSetupParam(hChannel,¶mNum)是让EDMA自己给paraNum重新赋一个值的，也就是说执行这个函数后paraNum可能会改变。不过这个不影响你的结果。
