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#include <stdio.h>
#include "string.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "esp_attr.h"
#include "soc/rtc.h"
#include "driver/mcpwm.h"
#include "soc/mcpwm_reg.h"
#include "soc/mcpwm_struct.h"
#include "esp_err.h"
#include "esp_log.h"

#include "utils/general.h"
#include "utils/node_storage.h"
#include "node/pwm.h"

static const char *TAG = "sample.pwm";

#define MCPWM_EN_SYNC 1

#define GPIO_SYNC_IN   18

#define FREQ_HZ		   100

static void mcpwm_example_gpio_initialize()
{
	ESP_LOGI(TAG, "Initializing all pwm pins");
	mcpwm_pin_config_t pin_config = {
	        .mcpwm0a_out_num = 16,
	        .mcpwm0b_out_num = 17,
	        .mcpwm1a_out_num = 21,
	        .mcpwm1b_out_num = 26,
	        .mcpwm_sync0_in_num  = GPIO_SYNC_IN,
	    };

	mcpwm_set_pin(MCPWM_UNIT_0, &pin_config);

	gpio_pulldown_en(GPIO_SYNC_IN); // needs to be pull down
}


/**
 * @brief Configure whole MCPWM module
 */
void initialize_gpios()
{
    //1. mcpwm gpio initialization
    mcpwm_example_gpio_initialize();

    //2. initialize mcpwm configuration
    ESP_LOGD(TAG, "Configuring Initial Parameters of mcpwm");
    mcpwm_config_t pwm_config;
    pwm_config.frequency = FREQ_HZ;
    pwm_config.cmpr_a = 0;       //duty cycle of PWMxA in %
    pwm_config.cmpr_b = 0;       //duty cycle of PWMxb in %
    pwm_config.counter_mode = MCPWM_UP_COUNTER;
    pwm_config.duty_mode = MCPWM_DUTY_MODE_1;
    mcpwm_init(MCPWM_UNIT_0, MCPWM_TIMER_0, &pwm_config);   //Configure PWM0A & PWM0B with above settings

    mcpwm_init(MCPWM_UNIT_0, MCPWM_TIMER_1, &pwm_config);   //Configure PWM1A & PWM1B with above settings


#if MCPWM_EN_SYNC
    mcpwm_sync_enable(MCPWM_UNIT_0, MCPWM_TIMER_0, MCPWM_SELECT_SYNC0, 0);
    mcpwm_sync_enable(MCPWM_UNIT_0, MCPWM_TIMER_1, MCPWM_SELECT_SYNC0, 0);
#endif

}

int change_status(int gpio, int duty) {
	if (gpio == 16) {
		ESP_ERROR_CHECK( mcpwm_set_duty(MCPWM_UNIT_0, MCPWM_TIMER_0, MCPWM_OPR_A, (float)value) );
	}
	else { //gpio 17
		ESP_ERROR_CHECK( mcpwm_set_duty(MCPWM_UNIT_0, MCPWM_TIMER_0, MCPWM_OPR_B, (float)value) );
	}

	return ret;
}

void main() {
	initialize_gpios();
	
	int ret = change_status(16, 50);

}