FridgeSensor/main/sound.c

#include "sound.h"
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
//#include "driver/gpio.h"
#include "esp_log.h"
#include "sdkconfig.h"
//#include "driver/dac.h"
#include "math.h"
#include "config.h"
#include "mqtt.h"

#ifdef SOUND_ENABLED

#define BUZZ_PIN          GPIO_NUM_25   // GPIO pin for DAC output GPIO25=Channel 1
#define BUZZ_SHORT_DURATION     200          // Duration of the buzz in ms
#define QUIET_DURATION         1000          // Duration of the quiet period in ms

static bool alarmEnabled = false; // Tracks the state of the normal alarm

static void activate_buzzer(int on_time, int off_time, int repetitions) {
    
    for (int i = 0; i < repetitions; i++) {
        gpio_set_level(BUZZ_PIN, 1); // Set GPIO high
        vTaskDelay(pdMS_TO_TICKS(on_time)); // Wait for the specified on time
        gpio_set_level(BUZZ_PIN, 0); // Set GPIO low
        vTaskDelay(pdMS_TO_TICKS(off_time)); // Wait for the specified off time
    }
}

static void setupSound() {

    // Configure GPIO25 as output and set it to inactive (low) by default
    gpio_config_t io_conf = {
        .pin_bit_mask = (1ULL << BUZZ_PIN),
        .mode = GPIO_MODE_OUTPUT,
        .pull_up_en = GPIO_PULLUP_DISABLE,
        .pull_down_en = GPIO_PULLDOWN_DISABLE,
        .intr_type = GPIO_INTR_DISABLE
    };
    gpio_config(&io_conf);

    // Set GPIO25 to low (inactive)
    gpio_set_level(BUZZ_PIN, 0);

    ESP_LOGI("SOUND", "Sound setup");
}

static void sound_task(void *pvParameters) {
    ESP_LOGI("SOUND", "Sound task starts....");

    setupSound();

    activate_buzzer(50, 0, 1); // Initial short beep to indicate sound system is ready

    while (1) {
        while( alarmEnabled ) {
            activate_buzzer(BUZZ_SHORT_DURATION, QUIET_DURATION, 1);
        }
        vTaskDelay(pdMS_TO_TICKS(100)); // Check alarm state every second
    }
}

void setAlarmState(bool enabled) {
    alarmEnabled = enabled;
    //ESP_LOGI("SOUND", "Alarm state set to: %s", enabled ? "ENABLED" : "DISABLED");
}

void triggerNotificationSound() {
    ESP_LOGI("SOUND", "Triggering short notification sound");
    activate_buzzer(100, 0, 1); // 100ms beep, no quiet time, single iteration
}

void initSound() {
    xTaskCreate(sound_task, "sound_task", 2048, NULL, 10, NULL);
    ESP_LOGI("SOUND", "Sound initialized");
}

#else
void initSound() {};
void triggerNotificationSound() {};
void setAlarmState(bool enabled) {};
#endif