setting PA2 as gpio interrupt on tiva 123

neelima g

Hello!

I'm using a micro controller TM4C123GH6PMI LAUNCHPAD board. I try to configure PA2 as GPIO input interrupt,not able to get interrupt. If i use any other port pin like pc6 or pe0 ,my interrupt routine works.So,pl.let me know if I am missing something.I am also using uart 0 & i2c1 of same portA.

Code is as follows

ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

HWREG(GPIO_PORTA_BASE + GPIO_O_PCTL) &= 0xfffff0ff;

ROM_GPIOPinTypeGPIOInput(GPIO_PORTA_BASE, GPIO_PIN_2);
ROM_GPIOIntTypeSet(GPIO_PORTA_BASE, GPIO_PIN_2, GPIO_LOW_LEVEL);
GPIOIntEnable(GPIO_PORTA_BASE, GPIO_PIN_2);

Regards,

Neelima

over 8 years ago

0 Amit Ashara over 8 years ago

TI__Guru**** 244380 points

Hello Neelima

What about enabling the GPIOA interrupt in NVIC using IntEnable(INT_GPIOA)?

0 neelima g over 8 years ago

Intellectual 490 points

Hi !
Yes. I have done it already in code after my other initialization code.
GPIOIntEnable(GPIO_PORTA_BASE, GPIO_PIN_2);

Regards,

Neelima

0 Amit Ashara over 8 years ago in reply to neelima g

TI__Guru**** 244380 points

Hello Neelima

You are only enabling the interrupt generation from the peripheral. You need to enable the interrupt in the NVIC as well using IntEnable(INT_GPIOA)

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setting PA2 as gpio interrupt on tiva 123