TMS320C6678: Inquiry regarding the EDMA3 technology

Donjie Billy Hipolito
Part Number: TMS320C6678
Hi Experts,
A customer has a query regarding the EDMA3 technology for the C6678 processor. We would appreciate it if you can provide feedback regarding the code written and some questions below.

I have attached the image of the code and output as well as the document file for easier reference. Thank you.
Question 1: There are some issues with the simulation data, and the transposed results are not quite correct. Is it a parameter issue?
Question 2: I am running this code on the C6678 development version and cannot output results. EDMA3 polling has fallen into a dead loop. What is the reason?
question.docx
over 2 years ago
0 Shankari G over 2 years ago
TI__Mastermind 25535 points
Let me look at it and get back
Regards
Shankari G
+1 Shankari G over 2 years ago in reply to Shankari G
TI__Mastermind 25535 points
Hi,
Before we get into your code, I would recommend you to have a look at the following code which does the ping-pong test on C6678 processor device.
Using the CSL sample code, I have just created a test-app EDMA-code to do the PING-PONG test on C6678.
I have tested it on C6678 board and the results are geiven as a CCS-snapshot.
The EDMA test flow is here:
/**
 *   @file  edma_test.c
 *
 *   @brief
 *      This is the Example test code for the EDMA CSL Functional layer.
 *
 *  \par
 *  NOTE:
 *      (C) Copyright 2009 Texas Instruments, Inc.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *    Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 *    Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 *    Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
*/

#include <stdio.h>

#include <ti/csl/csl_edma3.h>
#include <ti/csl/csl_edma3Aux.h>
#include <ti/csl/csl_cacheAux.h>


//#include <ti/csl/csl_xmc.h>

/**********************************************************************
 ************************** 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 utility function used by the EDMA example to verify the
 *      Data transfer.
 *
 *  @retval
 *      Success -   TRUE
 *  @retval
 *      Error -   FALSE
 */
static Bool Verify_Transfer
(
    Uint16      aCnt,
    Uint16      bCnt,
    Uint16      cCnt,
    Uint16      srcBIdx,
    Uint16      dstBIdx,
    Uint16      srcCIdx,
    Uint16      dstCIdx,
    Uint8      *srcBuff,
    Uint8      *dstBuff,
    Bool        abSync
)
{
    Uint32      loopIndex1;
    Uint32      loopIndex2;
    Uint32      loopIndex3;
    Uint8*      srcArrayPtr = (Uint8*)srcBuff;
    Uint8*      dstArrayPtr = (Uint8*)dstBuff;
    Uint8*      srcFramePtr = (Uint8*)srcBuff;
    Uint8*      dstFramePtr = (Uint8*)dstBuff;
    Uint16      key;


    /* Invalidate the cache before verification */
    /* Disable Interrupts */
    key = _disable_interrupts();
    CACHE_invL1d ((void *)srcBuff, 512, CACHE_WAIT);
    CACHE_invL2 ((void *)srcBuff, 512, CACHE_WAIT);
    CACHE_invL1d ((void *)dstBuff, 512, CACHE_WAIT);
    CACHE_invL2 ((void *)dstBuff, 512, CACHE_WAIT);
    _mfence();
    /* Re-enable Interrupts. */
    _restore_interrupts(key);


    for (loopIndex1 = 0; loopIndex1 < cCnt; loopIndex1++) {
        for (loopIndex2 = 0; loopIndex2 < bCnt; loopIndex2++) {
            for (loopIndex3 = 0; loopIndex3 < aCnt; loopIndex3++)
                if (srcArrayPtr[loopIndex3] != dstArrayPtr[loopIndex3])
                    return FALSE;
            srcArrayPtr = srcArrayPtr + srcBIdx;
            dstArrayPtr = dstArrayPtr + dstBIdx;
        }

        if (abSync) {
            srcFramePtr = srcFramePtr + srcCIdx;
            srcArrayPtr = srcFramePtr;
            dstFramePtr = dstFramePtr + dstCIdx;
            dstArrayPtr = dstFramePtr;
        }
        else {
            srcFramePtr = srcArrayPtr + srcCIdx - srcBIdx;
            srcArrayPtr = srcFramePtr;
            dstFramePtr = dstArrayPtr + dstCIdx - dstBIdx;
            dstArrayPtr = dstFramePtr;
        }
    }

    return TRUE;
}

/**
 *  @b Description
 *  @n
 *      This is the example routine which perform EDMA ping pong buffer transfer
 *      using a QDMA Channel.
 *      It implements following steps:-
 *          - Initializes and Opens the EDMA module
 *          - Sets up the Module and gets the module setup values
 *          - Enables the DMA and QDMA regions
 *          - Opens the specified QDMA channel 'channelNum'
 *          - PING uses PARAM Entry 1
 *          - PONG uses PARAM Entry 2
 *          - Configures the PARAM Blocks.
 *          - Enables the channel
 *          - Initiates the QDMA Transfer by setting the Trigger Word.
 *          - Poll on the IPR bit
 *          - Clear the pending bit
 *          - Compares the transfered data
 *          - Closes EDMA module
 *
 *  @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 qdma_link_xfer_region (Int32 instNum, Uint8 channelNum, Int32 regionNum)
{
    CSL_Edma3Handle             hModule;
    CSL_Edma3Obj                edmaObj;
    CSL_Edma3ParamHandle        hParamPong,hParamPing;
    CSL_Edma3ChannelObj         chObj;
    CSL_Edma3CmdIntr            regionIntr;
    CSL_Edma3CmdDrae            regionAccess;
    CSL_Edma3ChannelHandle      hChannel;
    CSL_Edma3ParamSetup         myParamSetup;
    CSL_Edma3Context            context;
    CSL_Edma3ChannelAttr        chAttr;
    CSL_Edma3CmdQrae            qraeSetup;
    CSL_Status                  status;
    Uint32                      loopIndex;

    /* Start the EDMA PING-PONG test over the SHADOW Region. */
    printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Shadow) Region %d for QDMA Channel %d...\n",
             instNum, regionNum, 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 failed\n");
        return -1;
    }

    /* Module level open */
    hModule = CSL_edma3Open(&edmaObj,instNum,NULL,&status);
    if ((hModule == NULL) || (status != CSL_SOK))
    {
        printf ("Error: EDMA module open failed\n");
        return -1;
    }

    /* Is this for GLOBAL or SHADOW Region */
    if (regionNum != CSL_EDMA3_REGION_GLOBAL)
    {
        /* Shadow Region: Enable DRAE enable(Bits 0-15) it. */
        regionAccess.region = regionNum;
        regionAccess.drae   = 0xFFFF;
        regionAccess.draeh  = 0x0000;
        if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, &regionAccess) != CSL_SOK)
        {
             printf ("Error: EDMA region enable command failed\n");
             return -1;
        }

        /* Enable access for all QDMA channels in the SHADOW Region. */
        qraeSetup.region = regionNum;
        qraeSetup.qrae   = 0xFF;
        if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_QDMAREGION_ENABLE, &qraeSetup) != CSL_SOK)
        {
             printf ("Error: EDMA QDMA region enable command failed\n");
             return -1;
        }
    }

    /* QDMA Channel Open */
    chAttr.regionNum = regionNum;
    chAttr.chaNum    = channelNum;
    hChannel = CSL_edma3ChannelOpen(&chObj, instNum, &chAttr, &status);
    if ((hChannel == NULL) || (status != CSL_SOK))
    {
        printf ("Error: EDMA channel open failed\n");
        return -1;
    }

    /* Map QDMA Channel to the PING Param Block i.e. 1 */
    CSL_edma3HwChannelSetupParam (hChannel, 1);

    /* Setup the trigger word for the QDMA Channel. */
    CSL_edma3HwChannelSetupTriggerWord(hChannel, 7);

    /* PING Parameter Entry Handle */
    hParamPing = CSL_edma3GetParamHandle(hChannel, 1, &status);
    if (hParamPing == NULL)
    {
        printf ("Error: EDMA get handle for param entry 1 failed\n");
        return -1;
    }

    /* PONG Parameter Entry Handle */
    hParamPong = CSL_edma3GetParamHandle(hChannel, 2, &status);
    if (hParamPong == NULL)
    {
        printf ("Error: EDMA get handle for param entry 2 failed\n");
        return -1;
    }

    /* Setup param entry */
    myParamSetup.option = CSL_EDMA3_OPT_MAKE(CSL_EDMA3_ITCCH_DIS, \
                                             CSL_EDMA3_TCCH_DIS, \
                                             CSL_EDMA3_ITCINT_DIS, \
                                             CSL_EDMA3_TCINT_DIS,\
                                             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;

    /* Setup PING to operate with this PARAM Entry. */
    if (CSL_edma3ParamSetup(hParamPing, &myParamSetup) != CSL_SOK)
    {
         printf ("Error: EDMA param setup failed\n");
         return -1;
    }

    /* Setting up the next entry */
    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;

    /* Setup for the Pong buffer */
    if (CSL_edma3ParamSetup(hParamPong,&myParamSetup) != CSL_SOK)
    {
         printf ("Error: EDMA param setup failed\n");
         return -1;
    }

    /* Enable Channel */
    if (CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_ENABLE, NULL) != CSL_SOK)
    {
         printf ("Error: EDMA channel enable command failed\n");
         return -1;
    }

    /* Trigger the word by writing to the trigger word... */
    if (CSL_edma3ParamWriteWord(hParamPing,7,1) != CSL_SOK) {
         printf ("Error: EDMA param write word failed\n");
         return -1;
    }

    /* Poll IPR bit */
    regionIntr.region = regionNum;
    do {
        CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
    } while (!(regionIntr.intr & 0x2));

    /* Clear pending interrupt */
    if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR, &regionIntr) != CSL_SOK)
    {
         printf ("Error: EDMA clear interrupt pend command failed\n");
         return -1;
    }

    /* Check transfer by comparing the source and destination buffers */
    if(Verify_Transfer( 256, 1, 1, 0, 0, 0, 0, srcBuff1, dstBuff1,TRUE) == FALSE)
    {
        printf ("Error: Verification (Source1/Destination1) Failed\n");
        return -1;
    }
    if(Verify_Transfer( 256, 1, 1, 0, 0, 0, 0, srcBuff2, dstBuff2,TRUE) == FALSE)
    {
        printf ("Error: Verification (Source2/Destination2) Failed\n");
        return -1;
    }

    /* Disable the channel */
    CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_DISABLE, NULL);

    /* Close channel */
    if (CSL_edma3ChannelClose(hChannel) != CSL_SOK)
    {
        printf("Error: EDMA channel close failed\n");
        return -1;
    }

    /* Close EDMA module */
    if (CSL_edma3Close(hModule) != CSL_SOK)
    {
        printf("Error: EDMA module close failed\n");
        return -1;
    }

    /* Test Passed. */
    return 0;
}

/**
 *  @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 failed\n");
        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 failed\n");
        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:%d\n", channelNum);
        return -1;
    }

    if(!instNum)
    {
        /* For first EDMA instance there are only 2 TCs and 2 event queues
         * Modify the channel default queue setup from 0 to 1
         */
         if (CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_1) != CSL_SOK)
        {
            printf ("Error: EDMA channel setup queue failed\n");
            return -1;
        }
    }
    else
    {
        /* For EDMA instance 1 and 2 maximum of 4 TCs and 4 event queues are supported
         * Change Channel Default queue setup from 0 to 3
         */
        if (CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_3) != CSL_SOK)
        {
            printf ("Error: EDMA channel setup queue failed\n");
            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) */
    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 failed\n");
        return -1;
    }

    /* Pong setup */
    myParamSetup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE(hParamPing,0);
    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;
    if (CSL_edma3ParamSetup(hParamPong,&myParamSetup) != CSL_SOK)
    {
        printf ("Error: EDMA Parameter Entry Setup failed\n");
        return -1;
    }

    /* 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);

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

    /* Poll on IPR bit 2 */
    do {
        CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
    } while (!(regionIntr.intr & 0x2));

    /* Check transfer by comparing the source and destination buffers */
    if(Verify_Transfer( 256, 1, 1, 0, 0, 0, 0, srcBuff1, dstBuff1, TRUE) == FALSE)
    {
        printf ("Error: Verification (Source1/Destination1) Failed\n");
        return -1;
    }
    if(Verify_Transfer( 256, 1, 1, 0, 0, 0, 0, srcBuff2, dstBuff2, TRUE) == FALSE)
    {
        printf ("Error: Verification (Source2/Destination2) Failed\n");
        return -1;
    }

    /* Close channel */
    if (CSL_edma3ChannelClose(hChannel) != CSL_SOK)
    {
        printf("Error: EDMA Channel Close failed\n");
        return -1;
    }

    /* Close EDMA module */
    if (CSL_edma3Close(hModule) != CSL_SOK)
    {
        printf("Error: EDMA Module Close failed\n");
        return -1;
    }

    /* The test passed. */
    return 0;
}

/**
 *  @b Description
 *  @n
 *      This is the example routine which performs the EDMA ping pong buffer transfer in
 *      the specified SHADOW Region.
 *
 *      It implements following steps
 *          - Intializes and Opens the EDMA Module .
 *          - Sets up the interrupt for the EDMA SHADOW 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 interrupts for the specific SHADOW Region.
 *          - 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
 *  @param[in]  regionNum
 *      Shadown Region Number on which the test is executed.
 *
 *  @retval
 *      Success -   0
 *  @retval
 *      Failure -   <0
 */
static Int32 edma_ping_pong_xfer_region (Int32 instNum, Uint8 channelNum, Int32 regionNum)
{
    CSL_Edma3Handle             hModule;
    CSL_Edma3Obj                edmaObj;
    CSL_Edma3ParamHandle        hParamPing;
    CSL_Edma3ParamHandle        hParamPong;
    CSL_Edma3ChannelObj         chObj;
    CSL_Edma3CmdIntr            regionIntr;
    CSL_Edma3CmdDrae            regionAccess;
    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 Shadow Region. */
    printf ("Debug: Testing EDMA(%d) Ping-Pong Test Shadow-Region %d for Channel %d...\n", instNum, regionNum, channelNum);

    /* Module Initialization */
    if (CSL_edma3Init(&context) != CSL_SOK)
    {
        printf ("Error: EDMA module initialization failed\n");
        return -1;
    }

    /* Module level open */
    hModule = CSL_edma3Open(&edmaObj, instNum, NULL, &status);
    if ((hModule == NULL) || (status != CSL_SOK))
    {
        printf ("Error: EDMA module open failed\n");
        return -1;
    }

    /* Determine the number of channels we need to enable. Is this Instance 0? */
    if (instNum == 0)
    {
        /* YES. DRAE enable(Bits 0-15) for the shadow region; since there are 16 channels. */
        regionAccess.region = regionNum;
        regionAccess.drae   = 0xFFFF;
        regionAccess.draeh  = 0x0;
        if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, &regionAccess) != CSL_SOK)
        {
            printf ("Error: EDMA region enable command failed\n");
            return -1;
        }
    }
    else
    {
        /* YES. DRAE enable(Bits 0-63) for the shadow region; since there are 64 channels. */
        regionAccess.region = regionNum;
        regionAccess.drae   = 0xFFFFFFFF;
        regionAccess.draeh  = 0xFFFFFFFF;
        if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, &regionAccess) != CSL_SOK)
        {
            printf ("Error: EDMA region enable command failed\n");
            return -1;
        }
    }

    /* Interrupt enable (Bits 0-11)  for the shadow region 5 */
    regionIntr.region = regionNum;
    regionIntr.intr   = 0x0FFF;
    regionIntr.intrh  = 0x0000;
    if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTR_ENABLE, &regionIntr) != CSL_SOK)
    {
        printf ("Error: EDMA interrupts enable command failed\n");
        return -1;
    }

    /* Open the channel in context of the specified region number. */
    chAttr.regionNum = regionNum;
    chAttr.chaNum    = channelNum;
    hChannel = CSL_edma3ChannelOpen(&chObj, instNum, &chAttr, &status);
    if ((hChannel == NULL) || (status != CSL_SOK))
    {
        printf ("Error: EDMA channel open failed\n");
        return -1;
    }

    /* Map the DMA Channel to the appropriate PARAM Block. We start with PING
     * which is located at PARAM Block 2. */
    if (CSL_edma3HwChannelSetupParam(hChannel, 2) != CSL_SOK)
    {
        printf ("Error: EDMA channel setup param failed\n");
        return -1;
    }

    /* Obtain a handle to parameter set 2 */
    hParamPing = CSL_edma3GetParamHandle(hChannel, 2, &status);
    if (hParamPing == NULL) {
        printf ("Error: EDMA get param handle for param entry 2 failed\n");
        return -1;
    }

    /* Obtain a handle to parameter set 1 */
    hParamPong = CSL_edma3GetParamHandle(hChannel, 1, &status);
    if (hParamPong == NULL) {
        printf ("Error: EDMA get param handle for param entry 1 failed\n");
        return -1;
    }

    /* Setup the first param set (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.srcAddr    = (Uint32)srcBuff1;
    myParamSetup.aCntbCnt   = CSL_EDMA3_CNT_MAKE(512,1);
    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;

    /* Setup the Ping Entry which loaded after the Pong entry gets exhausted */
    if (CSL_edma3ParamSetup(hParamPing,&myParamSetup) != CSL_SOK)
    {
        printf("Error: EDMA ping parameter entry setup is failed\n");
        return -1;
    }

    /* Setup the Pong Entry which loaded after the Ping entry gets exhausted */
    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, \
                                              TRUE,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 pong parameter entry setup is failed\n");
        return -1;
    }

    /* Enable channel */
    if (CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_ENABLE, NULL) != CSL_SOK)
    {
        printf("Error: EDMA channel enable command is failed\n");
        return -1;
    }

    /* Initialize data */
    for (loopIndex = 0; loopIndex < 512; loopIndex++) {
        srcBuff1[loopIndex] = loopIndex;
        srcBuff2[loopIndex] = loopIndex;
        dstBuff1[loopIndex] = 0;
        dstBuff2[loopIndex] = 0;
    }

    /* Manually trigger the channel */
    if (CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL) != CSL_SOK)
    {
        printf("Error: EDMA channel set command is failed\n");
        return -1;
    }

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

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

    /* Clear interrupt bit 0 */
    if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR, &regionIntr) != CSL_SOK)
    {
        printf("Error: EDMA clear interrupt bit 0 command is failed\n");
        return -1;
    }

    /* Mapping channel 0 to event queue 1 */
    if (CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_1) != CSL_SOK)
    {
        printf("Error: EDMA channel setup queue is failed\n");
        return -1;
    }

    /* Manually trigger the channel */
    if (CSL_edma3HwChannelControl(hChannel,CSL_EDMA3_CMD_CHANNEL_SET,NULL) != CSL_SOK)
    {
        printf("Error: EDMA channel set command is failed\n");
        return -1;
    }

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

    /* Poll on interrupt pend bit 1 */
    do {
        CSL_edma3GetHwStatus(hModule,CSL_EDMA3_QUERY_INTRPEND,&regionIntr);
    } while (!(regionIntr.intr & 0x2));

    /* Clear interrupt bit 1 */
    if (CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTRPEND_CLEAR, &regionIntr) != CSL_SOK)
    {
        printf("Error: EDMA clear interrupt bit 1 command is failed\n");
        return -1;
    }

    /* Verify the data has been transferred correctly. */
    if(Verify_Transfer(512, 1, 1, 0, 0, 0, 0, srcBuff1, dstBuff1,TRUE) == FALSE)
    {
        printf ("Error: Verification (Source1/Destination1) Failed\n");
        return -1;
    }
    if(Verify_Transfer(512, 1, 1, 0, 0, 0, 0, srcBuff2, dstBuff2,TRUE) == FALSE)
    {
        printf ("Error: Verification (Source2/Destination2) Failed\n");
        return -1;
    }

    /* Close channel */
    if (CSL_edma3ChannelClose(hChannel) != CSL_SOK)
    {
        printf("Error: EDMA channel close failed\n");
        return -1;
    }

    /* Close EDMA module */
    if (CSL_edma3Close(hModule) != CSL_SOK)
    {
        printf("Error: EDMA module close failed\n");
        return -1;
    }

    /* 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 FAILED\n", instNum, channelNum);
            return;
        }
        printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d Passed\n", instNum, channelNum);
    }

    /* EDMA Shadow Testing: This is run for all the SHADOW Regions from 0-7
     * and on all supported DMA Channels. */
    for (regionNum = CSL_EDMA3_REGION_0; regionNum <= CSL_EDMA3_REGION_7; regionNum++)
    {
        for (channelNum = 0; channelNum < 16; channelNum++)
        {
            if (edma_ping_pong_xfer_region(instNum, channelNum, regionNum) < 0)
            {
                printf ("Error: Testing EDMA(%d) Ping-Pong Test Shadow-Region %d for Channel %d FAILED\n",
                        instNum, regionNum, channelNum);
                return;
            }
            printf ("Debug: Testing EDMA(%d) Ping-Pong Test Shadow-Region %d for Channel %d Passed\n",
                    instNum, regionNum, channelNum);
        }
    }

    /* QDMA Testing: This is run for all SHADOW Regions from 0-7 and on
     * all supported QDMA Channels; there are 8 supported. Remember QDMA Channels start after the
     * DMA Channels which are 16 for Instance 0. */
    for (regionNum = CSL_EDMA3_REGION_GLOBAL; regionNum <= CSL_EDMA3_REGION_7; regionNum++)
    {
        for (channelNum = 16; channelNum < 24; channelNum++)
        {
            if (qdma_link_xfer_region(instNum, channelNum, regionNum) < 0)
            {
                printf ("Error: Testing EDMA(%d) Ping-Pong Test (Shadow) Region %d for QDMA Channel %d FAILED\n",
                        instNum, regionNum, channelNum);
                return;
            }
            printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Shadow) Region %d for QDMA Channel %d Passed\n",
                    instNum, regionNum, channelNum);
        }
    }

    /* Run the test for EDMA Instance 1 and 2; both have the same limits. */
    for (instNum = 1; instNum < 3; instNum++)
    {
        /* EDMA Instance 1 and 2: Supports 64 DMA Channels. */
        for (channelNum = 0; channelNum < 64; channelNum++)
        {
            if (edma_ping_pong_xfer_gbl_region(instNum, channelNum) < 0)
            {
                printf ("Error: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d FAILED\n",
                        instNum, channelNum);
                return;
            }
            printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Global) Region for Channel %d Passed\n",
                    instNum, channelNum);
        }

        /* EDMA Shadow Testing: This is run for all the SHADOW Regions from 0-7
         * and on all supported DMA Channels. */
        for (regionNum = CSL_EDMA3_REGION_0; regionNum <= CSL_EDMA3_REGION_7; regionNum++)
        {
            for (channelNum = 0; channelNum < 64; channelNum++)
            {
                if (edma_ping_pong_xfer_region(instNum, channelNum, regionNum) < 0)
                {
                    printf ("Error: Testing EDMA(%d) Ping-Pong Test Shadow-Region %d for Channel %d FAILED\n",
                            instNum, regionNum, channelNum);
                    return;
                }
                printf ("Debug: Testing EDMA(%d) Ping-Pong Test Shadow-Region %d for Channel %d Passed\n",
                        instNum, regionNum, channelNum);
            }
        }

        /* QDMA Testing: This is run for all SHADOW Regions from 0-7 and on
         * all supported QDMA Channels; there are 8 supported. Remember QDMA Channels start after the
         * DMA Channels which are 64 for Instance 1 and 2 */
        for (regionNum = CSL_EDMA3_REGION_GLOBAL; regionNum <= CSL_EDMA3_REGION_7; regionNum++)
        {
            for (channelNum = 64; channelNum < 72; channelNum++)
            {
                if (qdma_link_xfer_region(instNum, channelNum, regionNum) < 0)
                {
                    printf ("Error: Testing EDMA(%d) Ping-Pong Test (Shadow) Region %d for QDMA Channel %d FAILED\n",
                            instNum, regionNum, channelNum);
                    return;
                }
                printf ("Debug: Testing EDMA(%d) Ping-Pong Test (Shadow) Region %d for QDMA Channel %d Passed\n",
                        instNum, regionNum, channelNum);
            }
        }
    }

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

    return;
}
You can also find this file at C:\ti\pdk_c667x_2_0_16\packages\ti\csl\example\edma\edma_test.c
Output on channel tests.