LPC MicrocontrollersのトピックGPIO external interrupt

GPIO external interrupt

storm_rd — Thu, 19 Oct 2017 22:56:11 GMT

Hi,

I am working on GPIO external interrupt on LPC1769 board and having problems getting it to work. I have connected pin 2.11 to a push button and interrupt must be generated when the button is pushed. Any help is greatly appreciated. Thanks.. Below is the code,

#define EINT0 0

void EINT0_IRQHandler(void)

{

LPC_GPIOINT->IO2IntClr = (1 << 11);

printf("0interrupt\n");

}

int main(void) {

LPC_PINCON->PINSEL4 &= ~(3<<20);

LPC_PINCON->PINSEL4 |= (1<<20);

LPC_GPIO2->FIODIR &= ~(1<<10);

// LPC_GPIOINT->IO2IntEnF |= (0x01 <<10);

LPC_SC->EXTMODE = (1<<EINT0);

LPC_SC->EXTPOLAR = (1<<EINT0);

NVIC_EnableIRQ(EINT0_IRQn);

while(1)

{

}

return 0 ;

Re: GPIO external interrupt

jeremyzhou — Wed, 25 Oct 2017 02:14:34 GMT

Hi Ramadevi Jayaraman

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

To provide the fastest possible support, I'd like to recommend you to refer to the periph_pinint demo of the LPCOpen library.

If you have any further questions about it, please feel free to contact with me.

Have a great day,

TIC

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