Hi,
I am designing a piece of code that needs to incorporate a callback function when QEDMA'ing some data. I believe I have everything initialized correctly, and have verified that the DMA is actually working because I see my data placed in my destination buffer that I've set, but my callback function is not being called. Here is some snippets of my code I have:
Initialization stuff:
Int32Type tcc = EDMA_intAlloc(-1);
//Check for a valid tcc
if (tcc != -1)
{
emifEdmaConfig.opt = EDMA_OPT_RMK(
EDMA_OPT_PRI_HIGH,
// since we want to burst we need to keep it in WORDS
// remember we have 2 16bit consective registers to read from.
EDMA_OPT_ESIZE_32BIT,
EDMA_OPT_2DS_NO,
EDMA_OPT_SUM_NONE,
EDMA_OPT_2DD_NO,
EDMA_OPT_DUM_INC,
EDMA_OPT_TCINT_YES,
EDMA_OPT_TCC_OF( tcc & 0x0F),
EDMA_OPT_TCCM_OF( (tcc >> 4) & 0x03 ),
EDMA_OPT_ATCINT_DEFAULT,
EDMA_OPT_ATCC_DEFAULT,
EDMA_OPT_PDTS_DEFAULT,
EDMA_OPT_PDTD_DEFAULT,
EDMA_OPT_LINK_YES,
EDMA_OPT_FS_YES );
emifEdmaConfig.src = (Uint32) RX_FIFO_DATA;
emifEdmaConfig.idx = EDMA_IDX_OF( 0 );
emifEdmaConfig.rld = EDMA_RLD_OF( 0 );
//Hook the "EmifMsgEdmaRxCmpltIsr" operation for when the EDMA transfer completes
EDMA_intHook(tcc, (EDMA_IntHandler) EmifMsgEdmaRxCmpltIsr);
// Clear the EDMA complete interrupt
EDMA_intClear(tcc);
//Enable the interrupt
EDMA_intEnable(tcc);
}
else
{
LOG_printf(&trace, "FATAL ERROR: Invalid tcc returned from EDMA_intAlloc(). None left?");
}
My callback function:
void EmifMsgEdmaRxCmpltIsr( int tcc )
{
EDMA_intClear(tcc);
SEM_ipost(SDTR_EMIF_PCI_isr::emifRxEDMASem);
}
My QEDMA code:
emifEdmaConfig.cnt = dataLength;
emifEdmaConfig.dst = (Uint32) &theMsg->msg[PPMI_MSG_HDR_SIZE_WORDS];
//Check to make sure there IS a length!
if (emifEdmaConfig.cnt)
{
// QEDMA the data
EDMA_qdmaConfig(&emifEdmaConfig);
// Wait for EDMA completion (release the CPU for others)
//Wait only 2ms
if (SEM_pend (emifRxEDMASem, CLK_countspms()*2) == FALSE)
{
LOG_printf(&trace, "ERROR: Timeout on SEM_pend() for EMIF DMA tcc.");
}
}
else
{
LOG_printf(&trace, "No data length on EDMAConfig arg!");
}
