本帖最后由 一只耳朵怪 于 2018-6-25 11:38 编辑
各位专家好！
EDMA在进行link传输的时候，交替加载两组参数通过一个通道进行传输，我现在设置了两个源地址和两个目的缓冲区，交替往两个目的缓冲区传送数据，我希望的是在pong后回到ping 但是实际是触发第一次完成ping触发第二次完成了pong但触发第三次第四次都是pong，请问是什么原因呢？如果要达到希望的效果，应该做些什么修改？谢谢！
- /**
- * @file edma_test.c
- *
- * @brief
- *
- */
- #include
- #include <ti/csl/csl_edma3.h>
- #include
- #include
- #include
- /**********************************************************************
- ************************** Global Variables **************************
- **********************************************************************/
- /* Global Variables which are used to dump the TPCC register overlay in the
- * debugger... */
- 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 srcBuff2[512];
- Uint8 dstBuff1[512];
- Uint8 dstBuff2[512];
- /**********************************************************************
- ************************ EDMA TEST FUNCTIONS *************************
- **********************************************************************/
- /**
- * @b Description
- * @n
- * This is the example routine which perform EDMA ping pong buffer transfer
- * where channel is open in the global region.
- * It implements following steps
- * - Intializes and Opens the EDMA Module .
- * - Sets up the interrupt for the EDMA global region.
- * - Sets up the EDMA module using the API csl_edma3Hwsetup ()
- * - Enables the EDMA global region
- * - Opens the channel 'channelNum' get the param handle for PARAM 1, 2
- * - PING is mapped to PARAM Entry 1
- * - PONG is mapped to PARAM Entry 2
- * - PING is Linked with PONG...
- * - Enables the EDMA interrupt using CSL_EDMA3_CMD_INTR_ENABLE.
- * - Enables Interrupt (Bit 0-2) for the global region interrupts
- * - Manually triggers the DMA channel 'channelNum'(This should be PING)
- * - Polls on IPR bit 0 (Since TCC for PING is 0)
- * - Clear the pending bit
- * - Manually triggers the channel 'channelNum' (This should be PONG)
- * - Polls on IPR bit 1 (Since TCC for PONG is 1)
- * - Clears the pending bit
- * - Compares the data in the destination buffer is proper or not.
- * - Closes the EDMA module and channel.
- *
- * @param[in] instNum
- * EDMA Instance Number on which the test is executed.
- * @param[in] channelNum
- * EDMA Channel Number on which the test is executed
- *
- * @retval
- * Success - 0
- * @retval
- * Failure - <0
- */
- static Int32 edma_ping_pong_xfer_gbl_region (Int32 instNum, Uint8 channelNum)
- [
- 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;
- Uint32 loopIndex;
- /* 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);
- /* Initialize data */
- for (loopIndex = 0; loopIndex < 256; loopIndex++)
- [
- srcBuff1[loopIndex] = loopIndex;
- srcBuff2[loopIndex] = loopIndex;
- dstBuff1[loopIndex] = 0;
- dstBuff2[loopIndex] = 0;
- ]
- /* Module initialization */
- if (CSL_edma3Init(&context) != CSL_SOK)
- [
- printf ("Error: EDMA module initialization failedn");
- return -1;
- ]
- /* Open the EDMA Module using the provided instance number */
- hModule = CSL_edma3Open(&edmaObj, instNum, NULL, &status);
- if ( (hModule == NULL) || (status != CSL_SOK))
- [
- printf ("Error: EDMA module open failedn");
- return -1;
- ]
- /* Channel open */
- chAttr.regionNum = CSL_EDMA3_REGION_GLOBAL;
- chAttr.chaNum = channelNum;
- hChannel = CSL_edma3ChannelOpen(&chObj, instNum, &chAttr, &status);
- if ((hChannel == NULL) || (status != CSL_SOK))
- [
- printf ("Error: Unable to open EDMA Channel:%dn", channelNum);
- return -1;
- ]
- /* Change Channel Default queue setup from 0 to 3 */
- if(0)//if (CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_3) != CSL_SOK)
- [
- printf ("Error: EDMA channel setup queue failedn");
- return -1;
- ]
- /* Map the DMA Channel to PARAM Block 2. */
- CSL_edma3MapDMAChannelToParamBlock (hModule, channelNum, 2);
- /* Obtain a handle to parameter set 2 */
- hParamPing = CSL_edma3GetParamHandle(hChannel, 2, &status);
- if (hParamPing == NULL)
- [
- printf ("Error: EDMA Get Parameter Entry failed for 2.n");
- return -1;
- ]
- /* Obtain a handle to parameter set 1 */
- hParamPong = CSL_edma3GetParamHandle(hChannel, 1, &status);
- if (hParamPong == NULL)
- [
- printf ("Error: EDMA Get Parameter Entry failed for 1.n");
- return -1;
- ]
- /* Setup the parameter entry parameters (Ping buffer)//CSL_EDMA3_STATIC_EN我修改 */
- 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.srcAddr = (Uint32)srcBuff1;
- myParamSetup.aCntbCnt = CSL_EDMA3_CNT_MAKE(256,1);
- myParamSetup.dstAddr = (Uint32)dstBuff1;
- myParamSetup.srcDstBidx = CSL_EDMA3_BIDX_MAKE(1,1);
- myParamSetup.linkBcntrld= CSL_EDMA3_LINKBCNTRLD_MAKE(hParamPong,0);
- myParamSetup.srcDstCidx = CSL_EDMA3_CIDX_MAKE(0,1);
- myParamSetup.cCnt = 1;
- /* Ping setup */
- if (CSL_edma3ParamSetup(hParamPing,&myParamSetup) != CSL_SOK)
- [
- printf ("Error: EDMA Parameter Entry Setup failedn");
- return -1;
- ]
- /* Pong setup */
- 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_NONE,
- CSL_EDMA3_STATIC_EN,
- CSL_EDMA3_SYNC_A,
- CSL_EDMA3_ADDRMODE_INCR,
- CSL_EDMA3_ADDRMODE_INCR );
- myParamSetup.srcAddr = (Uint32)srcBuff2;
- myParamSetup.dstAddr = (Uint32)dstBuff2;
- myParamSetup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE(hParamPing,0);
- if (CSL_edma3ParamSetup(hParamPong,&myParamSetup) != CSL_SOK)
- [
- printf ("Error: EDMA Parameter Entry Setup failedn");
- return -1;
- ]
- //ZW added to keep the coherience between L1D and L2(MSM). Jun 1 2012
- CACHE_wbInvAllL1d(CACHE_NOWAIT);
- CACHE_wbInvAllL1dWait();
- /* 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,®ionIntr);
- /* Trigger channel 111111111111111*/
- 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,®ionIntr);
- ] while (!(regionIntr.intr & 0x1));
- /* Clear the pending bit清除挂起位 */
- CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR,®ionIntr);
- /* Trigger Channel222222222222222 */
- CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);
- /* Poll on IPR bit 2 */
- do [
- CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,®ionIntr);
- ] while (!(regionIntr.intr & 0x2));
- for (loopIndex = 0; loopIndex < 256; loopIndex++)
- [
- dstBuff1[loopIndex] = 0;
- dstBuff2[loopIndex] = 0;
- ]
- /* Clear the pending bit清除挂起位 */
- CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR,®ionIntr);
- /* Trigger Channel 33333333333333*/
- 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,®ionIntr);
- ] while (!(regionIntr.intr & 0x1));
- /* Trigger Channel 44444444444444*/
- CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL);
- /* Poll on IPR bit 2 */
- do [
- CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,®ionIntr);
- ] while (!(regionIntr.intr & 0x2));
- /* Close channel */
- if (CSL_edma3ChannelClose(hChannel) != CSL_SOK)
- [
- printf("Error: EDMA Channel Close failedn");
- return -1;
- ]
- /* Close EDMA module */
- if (CSL_edma3Close(hModule) != CSL_SOK)
- [
- printf("Error: EDMA Module Close failedn");
- return -1;
- ]
- /* The test passed. */
- return 0;
- ]
- /**
- * @b Description
- * @n
- * Entry point for the test code.
- *
- * @retval
- * Not Applicable.
- */
- void main (void)
- [
- Uint8 channelNum;
- // Int32 regionNum;
- Uint8 instNum = 0;
- printf ("**************************************************n");
- printf ("******************* EDMA Testing *****************n");
- printf ("**************************************************n");
- /* EDMA Instance 0: Supports only 16 DMA Channels. */
- for (channelNum = 0; channelNum < 16; channelNum++)
- [
- if (edma_ping_pong_xfer_gbl_region(instNum, channelNum) < 0)
- [
- printf ("Error: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d FAILEDn", instNum, channelNum);
- return;
- ]
- printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d Passedn", instNum, channelNum);
- ]
- printf ("**************************************************n");
- printf ("************* EDMA Testing Successful ************n");
- printf ("**************************************************n");
- return;
- ]
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