EVM6678l stuck on a routine CSL_EDMA3_GetHwStatus ().

Hi,

There are couple of problems in the example which we will fix in next BIOS-MCSDK drop. I am sendin the details in case if you would like to try the fix before getting the release.

1) Incorrect Event Queue assignement for EDMA Instance: 0

FIrst EDMA instance in the case of C6678 has 2  transfer controllers and 2 event queues. In the test it is trying to assign queue 3 which is fine in the case of second and third EDMA instance.  However it is incorrect in the case of instance 0. Here are the details of change:

Function:edma_ping_pong_xfer_gbl_region()

Current code:

if (CSL_edma3HwChannelSetupQue(hChannel,CSL_EDMA3_QUE_1) != CSL_SOK)

Modified code:

************

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;
        }

************

2) Cache invalidation for buffers being placed in MSMC or DDR.

This will be applicable if  .far section is in MSMC containing source and destination buffers. Before validating the buffer content, cache would need to be invalidated. See details on invalidation sequence:

Include cache related API access to the file by:

#include <ti/csl/csl_cacheAux.h>

Function: Verify_Transfer ()

Add following lines in beginning of the function:

    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);

Best Regards

Raghu