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[OMAP-L138] Megamodule example

John Tan
Intellectual 430 points

Hi

Are there examples on how to configure mega module to map DSP GPIO Bank 3 interrupt to CPU. I would like to use it as an interrupt event for EDMA3.

  • 0
    TI__Mastermind 43955 points
    Hi John Tan,

    I hope the following TI wiki page helps you to configure and trigger edma event via GPIO.

    processors.wiki.ti.com/.../Configuring_GPIO_EDMA_Events
  • 0 in reply to Shankari G
    Intellectual 430 points

    Hi Shankari

    I tried but it is not working right.

    In my .tcf, I am able to receive the interrupt correctly for 52 and it calls myisr. 

    /*ECM configuration*/
//Interrupt 52 is for GPIO Bank 3 (DSP Interrupt)
bios.HWI.instance("HWI_INT7").interruptSelectNumber=52;
bios.HWI.instance("HWI_INT7").fxn=prog.extern("myisr");

    In my EDMA Sync Interrupt, the interrupt number is 23 for GPIO Bank 3.
    In my AINTC Interrupt, the interrupt number is 45 for GPIO Bank 3. 

    Trying to use the GPIO settings,

    #define GPIO_BANK_3    3u
#define GPIO_3_8_PIN   57u  //Pin Num for GP3[8]

Gpio_Handle gpioHandle;
Gpio_Params gpioParams = Gpio_PARAMS;
Gpio_IntrCmdArg intrCmdArg;

gpioParams.instNum=0;
gpioParams.BankParams[GPIO_BANK_3].inUse = Gpio_InUse_No;
gpioParams.BankParams[GPIO_BANK_3].hwiNum = 7u;
gpioParams.BankParams[GPIO_BANK_3].PinConfigInfo[8].inUse = Gpio_InUse_No;

gpioHandle = Gpio_open(&gpioParams);

pinCmdArg.pin = GPIO3_8_PIN;
pinCmdArg.value = Gpio_Direction_Input;
Gpio_setPinDir(gpioHandle, &pinCmdArg);
Gpio_bankInterruptEnable(gpioHandle, GPIO3_8_PIN);
Gpio_setRaisingEdgeTrigger(gpioHandle, GPIO3_8_PIN);

    Is the settings correct?