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McASP on C6747 using interrupts

Gaston Schelotto
Expert 2860 points

Hi,

I'd like to set McASP using interrupt service when data is received in RBUF0. I've checked http://tiexpressdsp.com/index.php/Setting_up_interrupts_in_DSP_BIOS and set 61 as interrupt selection number (McASP0, 1 and 2). The problem is isr_mcasp is executed only 1 time as McASP runs continuously.

Any suggest?

Gaston

  • 0
    Expert 1545 points

    Are you writing to the EVTCLR1 register (bit 29) EC61 in your interrupt service routine? See  the DSP Megamodule reference guide SPRUFK5.pdf.

     

  • 0 in reply to Donald Reay
    Expert 2860 points

    Yes,after isr I executed

    IntcRegs->EVTCLR[1] = 0x20000000u;

    but only enters one time...I'm wondering if my PSC configuration is ok. I paste this for clarification purposes

        // power on the Mcasp 1 instance in the PSC
        Psc_ModuleClkCtrl(Psc_DevId_1, CSL_PSC_MCASP1, TRUE);

        // call the function to configure the evm specific options
        // Enable write access to PINMUX and CFG registers in KICK0R and KICK1R
        sysRegs->KICK0R = KICK0_ENABLE_KEY;
        sysRegs->KICK1R = KICK1_ENABLE_KEY;

        // write to the pinmux registers to enable the mcasp1
        sysRegs->PINMUX8 = 0x01100000u;  // Mcasp1
        sysRegs->PINMUX11 = 0x11100000u;  // Mcasp1
        sysRegs->PINMUX12 = 0x11111111u;  // Mcasp1
        sysRegs->PINMUX13 = 0x00111111u;  // Mcasp1

    regards,

    Gaston