Content originally posted in LPCWare by clarkzh on Thu Sep 25 06:58:08 MST 2014
in latetest expresso version example i see
/**
* @briefHandle interrupt from GPIO pin or GPIO pin mapped to PININT
* @returnNothing
*/
void PININT_IRQ_HANDLER(void)
{
/* Clear interrupt */
Chip_GPIO_ClearInts(LPC_GPIO, tmp, (1 << GPIO_PININT));
}
but i think the GPIO INT status might not be triggered by that pin. it should be checked first. like in previes vesion
see
void PIOINT0_IRQHandler(void)
{
uint32_t regVal;
gpio0_counter++;
regVal = GPIOIntStatus( PORT0, 1 );
if ( regVal )
{
p0_1_counter++;
GPIOIntClear( PORT0, 1 );
}
return;
}
i can not find similar function in expresso vesion example like :GPIOIntStatus( PORT0, 1 );
it is just abundant from this version . why? i need to read some reg to check which pin trigger the interrupt.
