Content originally posted in LPCWare by awinkX on Mon Mar 10 03:25:26 MST 2014
Iam using the LPC1111 with Keil and Ulink Pro
Following Code should jump into ISR with a falling edge on PIO1_5 but nothing happens.
void TIMER32_0_IRQHandler (void)
{
uint32_t irq_reason;
/* get IRQ reason */
irq_reason = LPC_TMR32B0->IR;
/* capture IRQ event */
if((irq_reason & 0x10)>0)
{
}
/* reset IRQ reason */
LPC_TMR32B0->IR = irq_reason;
}
int main (void)
{
SystemInit(); //12Mhz internal
/* Enable AHB clock to the GPIO domain. */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
/* Enable clock IOCON */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16);
LPC_IOCON->PIO1_5 = 2| 2<<3 | 1<<5; //input/pullup/hysteresis/CAP0
GPIOSetDir( 1, 5, 0 ); //PIO1_5 AS INPUT
GPIOSetValue( 1, 5, 0 );
LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 9); //enable clock signal to 32 bit timer0
LPC_TMR32B0->PR=1; //Prescaler 1
LPC_TMR32B0->TCR = 2; // Reset Timer
LPC_TMR32B0->CCR =6; //Capture on falling edge, Interrupt enable
NVIC_SetPriority(TIMER_32_0_IRQn, 1);
NVIC_EnableIRQ(TIMER_32_0_IRQn);
LPC_TMR32B0->TCR = 1; // Enable Timer
while(TRUE)
{
__NOP();
__NOP();
__NOP();
}
}
