TM4C129X gpio Interrupt on Port Q

Xiaobing Wang

Hi .

I wang to capture an gpio interrupt on PORT Q (PQ5) when PQ5 detected both-eages . I know each pin of port Q can trigger an interrupt and each pin have an individual interrupt vector .

the problem is that it can't get into Interrupt ISR ,I'am very confused .The code is as follows :

void GPIOInt_Init(void)
{
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOQ);

	GPIOPinTypeGPIOInput(GPIO_PORTQ_BASE,GPIO_PIN_5);

	GPIOIntTypeSet(GPIO_PORTQ_BASE,GPIO_PIN_5, GPIO_BOTH_EDGES | GPIO_DISCRETE_INT);
	GPIOIntRegister(GPIO_PORTQ_BASE, &ZeroCrossingISR);
	GPIOIntClear(GPIO_PORTQ_BASE,GPIO_PIN_5);
	GPIOIntEnable(GPIO_PORTQ_BASE,GPIO_PIN_5);
	IntDisable(INT_GPIOQ0);
	IntEnable(INT_GPIOQ5);
}


void ZeroCrossingISR(void)
{
	uint8_t IntStatus;

	IntStatus = GPIOIntStatus(GPIO_PORTQ_BASE,true);
	GPIOIntClear(GPIO_PORTQ_BASE,GPIO_PIN_5);
	if(IntStatus & GPIO_PIN_5)
	{
		if((HWREG(GPIO_PORTQ_BASE + (GPIO_O_DATA + (GPIO_PIN_5 << 2)))&GPIO_PIN_5))
		{
		
		}
		else
		{

		}
	}
}

over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244440 points

Hello Xiaobing,

The function GPIOIntRegister does the register of the interrupt on the Per Port Interrupt Line and not on the Per Pin Interrupt Line. Instead of using the API directly register the interrupt in the startup file table for interrupt vector.

Regards
Amit

0 Xiaobing Wang over 10 years ago in reply to Amit Ashara

Prodigy 120 points

Hello Amit ,

Thanks to your help , I solve this after I doing as you say .

Regards

0 Amit Ashara over 10 years ago in reply to Xiaobing Wang

TI__Guru**** 244440 points

Hello Xiaobing

Would be great if you can attach the code files for future users to refer to.

Regards
Amit

0 Xiaobing Wang over 10 years ago in reply to Amit Ashara

Prodigy 120 points

Hello Amit ,

I use two ways to do it and it can wordk well.

1、You see the function GPIOIntRegister does the register of the interrupt on the Per Port Interrupt Line and not on the Per Pin Interrupt Line ,I read the driverlib and you are write .So I use the function IntRegister() to register an interrupt function .

2、The second way is that I don't register an interupt function and just use startup file interrupt vector .So I just need to comment the code "GPIOIntRegister(GPIO_PORTQ_BASE, &ZeroCrossingISR);" and change the name of interrupt vector in startup file and state it 。

0 Amit Ashara over 10 years ago in reply to Xiaobing Wang

TI__Guru**** 244440 points

Hello Xiaobing

Thank you for bringing it to a good defined closure,

Regards
Amit

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TM4C129X gpio Interrupt on Port Q