T_project_micro_shape_photometer/main/heating_plate.c

/**
 * @file heating_plate.c
 * @author Finny (tianjialong0106@163.com)
 * @brief
 * @version 0.1
 * @date 2022-09-26
 *
 * @copyright Copyright (c) 2022
 *
 */

#include "heating_plate.h"
#include "driver/ledc.h"
#include "esp_err.h"

#define LEDC_TIMER LEDC_TIMER_0         //
#define LEDC_MODE LEDC_LOW_SPEED_MODE   //
#define LEDC_OUTPUT_IO (20)             // Define the output GPIO
#define LEDC_CHANNEL LEDC_CHANNEL_0     //
#define LEDC_DUTY_RES LEDC_TIMER_13_BIT // Set duty resolution to 13 bits
#define LEDC_DUTY (4095)                // Set duty to 50%. ((2 ** 13) - 1) * 50% = 4095
#define LEDC_FREQUENCY (5000)           // Frequency in Hertz. Set frequency at 5 kHz

#define heating_plate_target_temp 48.0
#define heating_plate_variable_temperature_range 0.5

static heating_plate_structer_t *heating_plate_structer_s;
static get_temp_callback_t get_temp_cb_s;

void T_heating_plate_init(heating_plate_structer_t *heating_plate_structer)
{
    heating_plate_structer_s = heating_plate_structer;
    // Prepare and then apply the LEDC PWM timer configuration
    ledc_timer_config_t ledc_timer = {
        .speed_mode = LEDC_MODE,
        .timer_num = LEDC_TIMER,
        .duty_resolution = LEDC_DUTY_RES,
        .freq_hz = LEDC_FREQUENCY, // Set output frequency at 5 kHz
        .clk_cfg = LEDC_AUTO_CLK};
    ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));

    // Prepare and then apply the LEDC PWM channel configuration
    ledc_channel_config_t ledc_channel = {
        .speed_mode = LEDC_MODE,
        .channel = LEDC_CHANNEL,
        .timer_sel = LEDC_TIMER,
        .intr_type = LEDC_INTR_DISABLE,
        .gpio_num = LEDC_OUTPUT_IO,
        .duty = 0, // Set duty to 0%
        .hpoint = 0};
    ESP_ERROR_CHECK(ledc_channel_config(&ledc_channel));
}

void T_heating_plate_registered_cb(get_temp_callback_t cb) { get_temp_cb_s = cb; }

void T_heating_plate_start(void)
{
    T_heating_plate_set_and_update_duty(LEDC_DUTY);
}

void T_heating_plate_stop(void)
{
    T_heating_plate_set_and_update_duty(0);
}

void T_heating_plate_schedule(void)
{
    if (heating_plate_structer_s->heating_plate_preheat_start_flag)
    {
        if (get_temp_cb_s() >= heating_plate_target_temp + heating_plate_variable_temperature_range)
        {
            T_heating_plate_stop();
        }
        else if (get_temp_cb_s() <= heating_plate_target_temp - heating_plate_variable_temperature_range)
        {
            T_heating_plate_start();
        }
    }
}

void T_heating_plate_set_and_update_duty(uint32_t duty)
{
    // Set duty
    ESP_ERROR_CHECK(ledc_set_duty(LEDC_MODE, LEDC_CHANNEL, duty));
    // Update duty to apply the new value
    ESP_ERROR_CHECK(ledc_update_duty(LEDC_MODE, LEDC_CHANNEL));
}