Hello ,
This is basically an ISR doubt.
I am trying to interrupt when there is a timer overflow.
But, it never goes to the ISR. Kindly suggest some solutions pls -
#include "derivative.h" /* include peripheral declarations */
//void UART0_IRQHandler(void);
//extern void LPTimer_IRQ(void);
int main(void)
{
int count;
uint16_t countTemp = 0;
asm(" CPSIE i");
//asm volatile ("cpsie i");
SIM_SOPT1 = 0;
SIM_SCGC5 |= (SIM_SCGC5_LPTMR_MASK | SIM_SCGC5_PORTB_MASK);//PORTC_PCR1 |= PORT_PCR_MUX(1);//select RTC_CLKIN function
PORTB_PCR8 |= 0x00000100; // alternative pin mux selection //
GPIOB_PDDR |= 0x00000100; // pin direction //
/*
NVIC_ICPR = 1 << (28);
NVIC_ISER = 1 << (28);
*/
SIM_SCGC5|=SIM_SCGC5_LPTMR_MASK;
/* Reset LPTMR settings */
SIM_SOPT1 = 0;
SIM_SCGC5 |= (SIM_SCGC5_LPTMR_MASK | SIM_SCGC5_PORTB_MASK);//PORTC_PCR1 |= PORT_PCR_MUX(1);//select RTC_CLKIN function
LPTMR0_CSR=0;
LPTMR0_CSR |= 0x00000040;
/* Set the compare value to the number of ms to delay */
LPTMR0_CMR = 600;
/* Start the timer */
LPTMR0_CSR |= LPTMR_CSR_TEN_MASK;
/* Wait for counter to reach compare value */
while(1){
}
}
void LPTimer_IRQHandler(void){
//while (!(LPTMR0_CSR & LPTMR_CSR_TCF_MASK));
/* Disable counter and Clear Timer Compare Flag */
LPTMR0_CSR &= ~LPTMR_CSR_TEN_MASK;
LPTMR0_CSR |= LPTMR_CSR_TCF_MASK;
GPIOB_PTOR |= (1<<8);
LPTMR0_CSR |= LPTMR_CSR_TEN_MASK;
}
/*
void enable_irq (int irq)
{
//int div;
/* Determine which of the NVICISERs corresponds to the irq */
// div = irq/32;
//NVICICPR0 = 1 << (irq);
/*
switch (irq)
{
case 0x0:
NVICICPR0 = 1 << (irq);
NVICISER0 = 1 << (irq%32);
break;
case 0x1:
NVICICPR1 = 1 << (irq%32);
NVICISER1 = 1 << (irq%32);
break;
case 0x2:
NVICICPR2 = 1 << (irq%32);
NVICISER2 = 1 << (irq%32);
break;
}
*/
//}*/
