RE: nRF52832 Timer interrupt not working

Meera Shah — Fri, 11 Jan 2019 10:26:41 GMT

I got error of multiple definition error of TIMER1_IRQHandler

RE: nRF52832 Timer interrupt not working

Kenneth — Tue, 13 Feb 2018 21:24:06 GMT

Try this:

#include <stdbool.h>
#include <stdint.h>
#include "nrf_drv_timer.h"
#include "nrf52.h"
#include "nrf_gpio.h"

#define RED_LED_PIN 17 // LED1 on nRF52-DK

void TIMER1_IRQHandler(void)
{
    if(NRF_TIMER1->EVENTS_COMPARE[0] == 1)
    {
        NRF_TIMER1->EVENTS_COMPARE[0] = 0;
        nrf_gpio_pin_toggle(RED_LED_PIN);    
    }
}

int main()
{
    // Output LED pin
    nrf_gpio_pin_clear(RED_LED_PIN);
    nrf_gpio_cfg_output(RED_LED_PIN);

    //Enable ~1sec timer 
    NVIC_DisableIRQ(TIMER1_IRQn); // use "sd_nvic" prefix with softdevice
    
    nrf_timer_task_trigger(NRF_TIMER1, NRF_TIMER_TASK_STOP);
    nrf_timer_task_trigger(NRF_TIMER1, NRF_TIMER_TASK_CLEAR);
    
    nrf_timer_mode_set(NRF_TIMER1, NRF_TIMER_MODE_TIMER); 
    nrf_timer_bit_width_set(NRF_TIMER1, NRF_TIMER_BIT_WIDTH_32);
    nrf_timer_frequency_set(NRF_TIMER1, NRF_TIMER_FREQ_31250Hz);
    nrf_timer_cc_write(NRF_TIMER1, NRF_TIMER_CC_CHANNEL0, 31250);
    nrf_timer_int_enable(NRF_TIMER1, NRF_TIMER_INT_COMPARE0_MASK);
    nrf_timer_shorts_enable(NRF_TIMER1, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK); // self running
    
    NVIC_SetPriority(TIMER1_IRQn, 7); // use "sd_nvic" prefix with softdevice
    NVIC_EnableIRQ(TIMER1_IRQn); // use "sd_nvic" prefix with softdevice

    nrf_timer_task_trigger(NRF_TIMER1, NRF_TIMER_TASK_START);

    while(1)
    {
    } 
}