#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <driver/gpio.h>
#include <esp_log.h>

#define CONFIG_LOG_MAXIMUM_LEVEL  5
#define BUTTON_PIN GPIO_NUM_35

static const char *TAG = "IRAM_ISR";
static DRAM_ATTR volatile bool intr_trig = false;
static DRAM_ATTR volatile uint32_t intr_count = 0;

static void IRAM_ATTR helper(void) {
  intr_count++;
  intr_trig = true;
}

static void IRAM_ATTR btn_isr(void *arg) {
  helper();
}

void app_main(void) {
  esp_log_level_set(TAG, ESP_LOG_VERBOSE);
  gpio_config_t btn_cfg = {
    .pin_bit_mask = 1ULL << BUTTON_PIN,
    .mode = GPIO_MODE_INPUT,
    .pull_up_en = GPIO_PULLUP_ENABLE,
    .pull_down_en = GPIO_PULLDOWN_DISABLE,
    .intr_type = GPIO_INTR_NEGEDGE,
  };
  
  gpio_config(&btn_cfg);
  gpio_install_isr_service(ESP_INTR_FLAG_IRAM);
  gpio_isr_handler_add(BUTTON_PIN, btn_isr, NULL);

  while (true) {
    if (intr_trig) {
      gpio_intr_disable(BUTTON_PIN);
      uint32_t count = intr_count;
      intr_trig = false;
      gpio_intr_enable(BUTTON_PIN);

      ESP_LOGI(TAG, "按鍵中斷次數：%" PRIu32, count);
    }
    vTaskDelay(pdMS_TO_TICKS(10));
  }
}