Other Parts Discussed in Thread: TMS320C6455, SPRC234
void initEdma(void)
{
CSL_Edma3HwSetup hwSetup;
CSL_Edma3Obj edmaObj;
CSL_Edma3ParamHandle hParamBasic;
CSL_Edma3ChannelObj chObj;
CSL_Edma3CmdIntr regionIntr;
CSL_Edma3ParamSetup myParamSetup;
CSL_Edma3Context context;
CSL_Edma3ChannelAttr chAttr;
CSL_Edma3HwDmaChannelSetup dmahwSetup;
Uint32 loopIndex;
CSL_Status status;
unsigned long long llTemp;
//Module initialization
status = CSL_edma3Init(&context);
if (status != CSL_SOK) {
printf ("Edma module initialization failed\n");
return;
}
// Intc module initialization
intcContext.eventhandlerRecord = EventHandler;
intcContext.numEvtEntries = 10;
CSL_intcInit(&intcContext);
// Enable NMIs
CSL_intcGlobalNmiEnable();
// Enable global interrupts
CSL_intcGlobalEnable(&state);
// Opening a intc handle for edma event
vectId = CSL_INTC_VECTID_4;
hIntcEdma = CSL_intcOpen (&intcObjEdma, CSL_INTC_EVENTID_RINT0, &vectId , NULL);
hModule = CSL_edma3Open(&edmaObj,CSL_EDMA3,NULL,&status);
if ( (hModule == NULL) || (status != CSL_SOK)) {
printf ("Edma module open failed\n");
return;
}
gRcvTCC = CSL_EDMA3_CHA_REVT0;
// Edma module setup
dmahwSetup.paramNum = 0;
dmahwSetup.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;
}
/* Setup the DRAE masks
*/
regionAccess.region = CSL_EDMA3_REGION_0;
regionAccess.drae = 0xFFFF ;
regionAccess.draeh = 0xff0000;
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_DMAREGION_ENABLE, ®ionAccess);
if (status != CSL_SOK) {
printf("Edma region enable command failed\n");
return;
}
/* Channel open */
chAttr.regionNum = CSL_EDMA3_REGION_0;
chAttr.chaNum = gRcvTCC;
hChannel = CSL_edma3ChannelOpen(&chObj, CSL_EDMA3, &chAttr, &status);
if ( (hChannel == NULL) || (status != CSL_SOK)) {
printf ("Edma channel open failed\n");
return;
}
/* Get the parameter handle */
hParamBasic = CSL_edma3GetParamHandle(hChannel,0,&status);
if (hParamBasic == NULL) {
printf("Edma get param handle failed\n");
return;
}
/* Edma parameter entry Setup */
myParamSetup.option = CSL_EDMA3_OPT_MAKE(CSL_EDMA3_ITCCH_DIS, \
CSL_EDMA3_TCCH_DIS, \
CSL_EDMA3_ITCINT_DIS, \
CSL_EDMA3_TCINT_EN,\
gRcvTCC,\
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)0x30000000; //McBSP Receive Address
myParamSetup.aCntbCnt = CSL_EDMA3_CNT_MAKE(1,1);
myParamSetup.dstAddr = (Uint32)recvbuf;
myParamSetup.srcDstBidx = CSL_EDMA3_BIDX_MAKE(0,0);
myParamSetup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE (hParamBasic,0);
myParamSetup.srcDstCidx = CSL_EDMA3_CIDX_MAKE(0,0);
myParamSetup.cCnt = 1;
status = CSL_edma3ParamSetup(hParamBasic,&myParamSetup);
if (status != CSL_SOK) {
printf ("Edma param setup failed\n");
return;
}
/* Association of an EDMA event handler with the INTC routine */
EventRecord.handler = &eventEdmaHandler;
EventRecord.arg = (void*)(hModule);
CSL_intcPlugEventHandler(hIntcEdma,&EventRecord);
/* Enabling event edma */
CSL_intcHwControl(hIntcEdma,CSL_INTC_CMD_EVTENABLE,NULL);
/* Hook up the EDMA event with an completion code function handler */
EdmaEventHook(gRcvTCC, tcc13Fxn);
/* Enable interrupts */
regionIntr.region = CSL_EDMA3_REGION_0;
llTemp |= (unsigned long long)1 << gRcvTCC;
regionIntr.intr = _loll(llTemp);
regionIntr.intrh = _hill(llTemp);
status = CSL_edma3HwControl(hModule,CSL_EDMA3_CMD_INTR_ENABLE,®ionIntr);
if (status != CSL_SOK) {
printf ("Edma interrupt enable command 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 failed\n");
return;
}
}
Read through the EDMA3 for the C6455 McBSP input data (DRR).
In order to test the EDMA interrupt when data is entered in the McBSP.
McBSP Digital loop back mode (DLB) have been set.
Therefore,
McBSP output data (DXR) is passed to the input data (DRR).
At this time, the EDMA interrupt occurs.
// McBSP setup
hMcbsp->regs->PCR = 0x00000f00;
hMcbsp->regs->RCR = 0x7f040040;
hMcbsp->regs->XCR = 0x7f040040;
hMcbsp->regs->SRGR = 0x20400101;
hMcbsp->regs->SPCR = 0x00c18001;
EDMA set up like the attached file.
But,
McBS input data (DRR) is not copied to the buffer of EDMA.
McBSP input data (DRR) have been confirmed.
Ask a code review.
TMS320C620x,C642x McBSP UART(spra633c).pdf note, but
C6455 of the CSL (EDMA3) version, and there is a difference.
Ask if the code sample is worth noting McBSP-EDMA Interrupt.
Thank you.
