3// #include <stdio.h>
// #include "freertos/FreeRTOS.h"
// #include "freertos/task.h"
// #include "driver/ledc.h"
// #include "driver/adc.h"

// #define LED_PIN GPIO_NUM_23 // PWM OUTPUT
// #define ADC_CHANNEL ADC_CHANNEL_6 // GPIO34 (A2) for ADC

// //PWM Parameters
// #define PWM_CHANNEL LEDC_CHANNEL_0//ASSIGNING ONE CHANNEL FOR PWM SIGNAL
// //The PWM_CHANNEL (which is channel 0) will be linked to the GPIO pin controlling the brightness of the LED.
// #define PWM_FREQ 5000
// #define PWM_RESOLUTION LEDC_TIMER_8_BIT
// //PWM_RESOLUTION specifies the resolution of the PWM signal, which in this case is 8-bit resolution.
// //This means the duty cycle can vary between 0 and 255.

// void app_main(void) {

//   // Set up ADC (Analog-to-Digital Converter) for reading the potentiometer
//   adc1_config_width(ADC_WIDTH_BIT_12);// 12-bit resolution (0-4095)
//   adc1_config_channel_atten(ADC_PIN, ADC_ATTEN_DB_);// 0dB attenuation (0-3.3V)

//   // Set up PWM (Pulse Width Modulation) for controlling the LED brightness
//   ledc_timer_config_t pwm_timer = {
//     .speed_mode = LEDC_HIGH_SPEED_MODE,
//     .timer_num = LEDC_TIMER_0,
//     .duty_resolution = PWM_RESOLUTION,
//     .freq_hz = PWM_FREQ,// Frequency set to 5 kHz
//     .clk_cfg = LEDC_AUTO_CLK
//   };
//   ledc_timer_config(&pwm_timer);

//   ledc_channel_config_t pwm_channel = {
//     .channel = PWM_CHANNEL,
//     .duty = 0,
//     .gpio_num = LED_PIN,
//     .speed_mode = LEDC_HIGH_SPEED_MODE,
//     .hpoint = 0,
//     .timer_sel = LEDC_TIMER_0
//   };
//   ledc_channel_config(&pwm_channel);



//   // gpio_config_t cfg = {
//   //   .pin_bit_mask = (1<<LED);
//   //   .mode = GPIO_MODE_OUTPUT;
//   // }

//   // gpio_config(&cfg);

//   while (true) {

//     int adc_value = adc1_get_raw(ADC_PIN);
//     int duty_cycle = (adc_value * 255)/4095; // Map 0-4095 to 0-255

//     ledc_set_duty(LEDC_HIGH_SPEED_MODE, PWM_CHANNEL, duty_cycle);
//     ledc_update_duty(LEDC_HIGH_SPEED_MODE, PWM_CHANNEL);

//     vTaskDelay(50 / portTICK_PERIOD_MS);
//   }
// }


#include <stdio.h>
#include "driver/ledc.h"
#include "driver/adc.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

// Define the pins and channels
#define ADC_PIN        ADC1_CHANNEL_6  // GPIO34 for potentiometer (ADC)
#define LED_PIN        GPIO_NUM_23     // GPIO23 for LED (PWM)

// Define PWM parameters
#define PWM_CHANNEL    LEDC_CHANNEL_0  // PWM Channel 0
#define PWM_FREQ       5000            // PWM Frequency in Hz
#define PWM_RESOLUTION LEDC_TIMER_8_BIT // 8-bit resolution (0-255 duty cycle)

void app_main(void) {
    // Set up ADC (Analog-to-Digital Converter) for reading the potentiometer
    adc1_config_width(ADC_WIDTH_BIT_12);   // 12-bit resolution (0-4095)
    adc1_config_channel_atten(ADC_PIN, ADC_ATTEN_DB_0);  // 0dB attenuation (0-3.3V)

    // Set up PWM (Pulse Width Modulation) for controlling the LED brightness
    ledc_timer_config_t pwm_timer = {
        .speed_mode = LEDC_HIGH_SPEED_MODE,   // High-speed mode
        .timer_num = LEDC_TIMER_0,            // Timer 0
        .duty_resolution = PWM_RESOLUTION,    // 8-bit resolution (0-255 duty cycle)
        .freq_hz = PWM_FREQ,                  // Frequency set to 5 kHz
        .clk_cfg = LEDC_AUTO_CLK              // Auto-select clock
    };
    
    ledc_timer_config(&pwm_timer);

    ledc_channel_config_t pwm_channel = {
        .channel    = PWM_CHANNEL,            // Use PWM Channel 0
        .duty       = 0,                      // Initial duty cycle 0 (LED off)
        .gpio_num   = LED_PIN,                // Control LED on GPIO 23
        .speed_mode = LEDC_HIGH_SPEED_MODE,   // High-speed mode
        .hpoint     = 0,                      // No high point offset
        .timer_sel  = LEDC_TIMER_0            // Link to Timer 0
    };
    ledc_channel_config(&pwm_channel);

    while (1) {
        // Read the potentiometer value (0-4095)
        int adc_value = adc1_get_raw(ADC_PIN); 
        printf("ADC Value: %d\n", adc_value);  // Print the value for debugging

        // Map the potentiometer value (0-4095) to PWM duty cycle (0-255)
        int duty_cycle = (adc_value * 255) / 4095;

        // Set the PWM duty cycle to control LED brightness
        ledc_set_duty(LEDC_HIGH_SPEED_MODE, PWM_CHANNEL, duty_cycle);
        ledc_update_duty(LEDC_HIGH_SPEED_MODE, PWM_CHANNEL);

        vTaskDelay(50 / portTICK_PERIOD_MS);  // Small delay of 50ms
    }
}













//PWM_CHANNEL: Defines which PWM channel is used (here, it's channel 0).
//PWM_FREQ (5000 Hz): Sets the PWM signal frequency to 5 kHz, which ensures smooth dimming of the LED without noticeable flicker.
//PWM_RESOLUTION (8-bit): Specifies the resolution of the PWM signal. With 8-bit resolution, you get 256 different duty cycle levels (0-255) to control the LED brightness.