c6678 gpio interrupt

Aviv

Intellectual 335 points

Hi,

I have c6678, sys/bios 6.32.05.54. I am trying to create an gpio interrupt.

I set gpio 15 as output and gpio 14 as input and I connect the two gpios by wire.

// Open the CSL GPIO Module 0

hGpio =CSL_GPIO_open (0);

//Output gpio 15

CSL_GPIO_setPinDirOutput (hGpio, 15);

//Input gpio 14

CSL_GPIO_setPinDirInput (hGpio, 14);

CSL_GPIO_setFallingEdgeDetect (hGpio, 14);

CSL_GPIO_bankInterruptEnable (hGpio,0);

//Create HWi

Hwi_Params hwiParams;

Error_Block eb;

Hwi_Params_init(&hwiParams);

Error_init(&eb);

hwiParams.arg = 14;

hwiParams.eventId = 88; //Gpio 14 event number from data manual

hwiParams.maskSetting = Hwi_MaskingOption_SELF;

myHwi = Hwi_create(1, myIsr, &hwiParams, &eb);

if (Error_check(&eb)) {

// handle the error

}

//Change gpio 15 from 1 to 0

CSL_GPIO_setOutputData (hGpio, 15);

CSL_GPIO_clearOutputData (hGpio, 15);

I don't get an Interrupt. What am I missing?

Thanks

Aviv

over 13 years ago

Chad Courtney over 13 years ago

TI__Mastermind 30825 points

Aviv,

Have you probed the actual GPIO pins to verify you have a transition? Have you looked at the Interrupt registers to see if you have an Event coming in? Have you verified that the HW Interrupt is setup correctly?

Moving this to the BIOS forum as this is being setup for BIOS handling of interrupts.

Best Regards,

Chad

Tom Kopriva over 13 years ago

TI__Mastermind 20480 points

Hi Aviv,

The 1st argument of Hwi_create() is the interrupt number on the CorePac interrupt controller.

This should be anywhere from 4 -15 user assignable interrupt sources. If you check the value of myHwi, it should be NULL as you have it right now.

Section 9 of the CorePac's User Guide will help to understand how this is tied together.

hwiParams.eventId = 88;
hwiParmas.MaskingOption_SELF;
myHwi = Hwi_create(4, myIsr, &hwiParams, &eb);|
if (myHwi == NULL) {
System_abort("Hwi not created");
}

This will enable user interrupt 4 with eventID 88.