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static void timer_group0_isr(void* arg) {

    printf("timer_group0_isr OK!\n");
	
    TIMERG0.int_clr_timers.t0 = 1;
    TIMERG0.hw_timer[0].config.alarm_en = 1;
}

void timer_tg0_initialise (int timer_idx) {

  timer_config_t config = {
  		  .alarm_en = true,
  		  .counter_en = false,
  		  .intr_type = TIMER_INTR_LEVEL,
  		  .counter_dir = TIMER_COUNT_UP,
  		  .auto_reload = true,
  		  .divider = 80
    };


  timer_init(TIMER_GROUP_0, timer_idx, &config);
  timer_set_counter_value(TIMER_GROUP_0, timer_idx, 0);
  timer_set_alarm_value(TIMER_GROUP_0, timer_idx, 10000);
  timer_enable_intr(TIMER_GROUP_0, timer_idx);
  timer_isr_register(TIMER_GROUP_0, timer_idx, timer_group0_isr, (void *) timer_idx, ESP_INTR_FLAG_IRAM, NULL);
  timer_start(TIMER_GROUP_0, timer_idx);

  printf("timer initialzied!!!!\n");
}

Code: Select all

timer_tg0_initialise(TIMER_0);

Code: Select all

uint32_t c = 0;
static void timer_group0_isr(void* arg) {
    c++;
    TIMERG0.int_clr_timers.t0 = 1;
    TIMERG0.hw_timer[0].config.alarm_en = 1;
}

Code: Select all

    vTaskDelay(2000 / portTICK_PERIOD_MS);
    timer_tg0_initialise(TIMER_0);

    while(1) {
        vTaskDelay(500 / portTICK_PERIOD_MS);
        printf("c :   %d\n", c);
    }