EDMA3 doesn't trigger an ISR

Jhon Scott

Intellectual 530 points

Hi everyone,

I would like to trigger an ISR at the end of a DMA completion (I'm working on C6678).

Using the debugger, I've seen that the correct IFR bit is set when I trigger the transfert by CPU.

But my problem is that the program doesn't go into the ISR.

I registered my ISR as is:

    EventRecord.handler = &test_isr_handler;
    EventRecord.arg = 0;

    if (CSL_intcPlugEventHandler(hTest,&EventRecord) != CSL_SOK)
    {
       System_printf("Error: GEM-INTC Plug event handler failed\n");
       exit(0);
    }

For the DMA transfert, my param are as follow:

    param_setup.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_EN,
                                           CSL_EDMA3_SYNC_A,
                                           CSL_EDMA3_ADDRMODE_INCR,
                                           CSL_EDMA3_ADDRMODE_INCR);

   param_setup.srcAddr       = (Uint32)&buffer;
   param_setup.dstAddr    = (Uint32)0x40000000;
   param_setup.aCntbCnt   = CSL_EDMA3_CNT_MAKE(TAILLE_BUFFER, 1) ;
   param_setup.cCnt        = 1;
   param_setup.srcDstBidx    = CSL_EDMA3_BIDX_MAKE(1, 1) ;
   param_setup.linkBcntrld = CSL_EDMA3_LINKBCNTRLD_MAKE(CSL_EDMA3_LINK_NULL, 0);
   param_setup.srcDstCidx   = CSL_EDMA3_CIDX_MAKE(0,0);

I activated interrupts for the global region:

    regionIntr.region    = CSL_EDMA3_REGION_GLOBAL;
   regionIntr.intr    = 1;
   regionIntr.intrh    = 0;

   status = CSL_edma3HwControl(EDMA_handle,CSL_EDMA3_CMD_INTR_ENABLE,&regionIntr);

Just after triggering the transfert :

status = CSL_edma3HwChannelControl(canal_handle,CSL_EDMA3_CMD_CHANNEL_SET,NULL);

the correct IFR bit is set, but I my program doesn't run my ISR function.

Does someone have an idea on my problem ? Maybe something I miss during the EDMA configuration ?

over 13 years ago

0 Chad Courtney over 13 years ago

TI__Mastermind 30825 points

Have you checked the IER bit for the interrupt to verify it's enabled? Also, make sure the GIE bit is set in the CSR register (this info is documented in the C66x CPU and Instruction Set RG SPRUGH7.)

Best Regards,

Chad

0 Jhon Scott over 13 years ago in reply to Chad Courtney

Intellectual 530 points

Hi Chad, thank you for your reply

I checked the values of the registers you told me and:

IER took the value 0x00000013. (IE04 is enabled)

The GIE bit is also set.

0 Jhon Scott over 13 years ago in reply to Jhon Scott

Intellectual 530 points

I put some code in my ISR function and it is working well for now... I don't know why it wasn't working with a simple "printf" in it. But the result is here. Thank you again for your help.

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EDMA3 doesn't trigger an ISR