Hi to all, i am new with lpcxpresso and i have a simple question
i would like change the value of a variable during an interrupt but the interrupt function is void, for this reason i try to use extern volatile variable but it seems not work
this is the code
extern volatile uint64_t counter_1=0;
void RIT_IRQHandler(void)
{
/* Clear interrupt */
Chip_RIT_ClearIntStatus(LPC_RITIMER);
counter_1=counter_1+1;
printf(" counter_1 vale %d \n",counter_1);
Board_LED_Toggle(1);
}
/**
* @brief Main entry point
* @return Nothing
*/
int main(void)
{
/* Generic Initialization */
SystemCoreClockUpdate();
Board_Init();
/* Initialize RITimer */
Chip_RIT_Init(LPC_RITIMER);
/* Configure RIT for a periodic interrupt tick rate */
Chip_RIT_SetTimerIntervalHz(LPC_RITIMER, TIME_INTERVAL);
Chip_RIT_Enable(LPC_RITIMER);
NVIC_EnableIRQ(RITIMER_IRQn);
/* LED is toggled in interrupt handler */
while (1) {
/* Sleep between interrupts */
__WFI();
}
}
i would like increment the variable counter_1 every time an interrupt occours but it seems not work
thx you
