#include "main.h"

ADC_HandleTypeDef hadc1;
TIM_HandleTypeDef htim2;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_TIM2_Init(void);

volatile uint32_t adcValue = 0;

int main(void) {
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_ADC1_Init();
    MX_TIM2_Init();

    // Start ADC in DMA mode (optional, or use polling)
    HAL_ADC_Start(&hadc1);

    // Start Timer
    HAL_TIM_Base_Start_IT(&htim2);

    while (1) {
        // Read ADC value (use DMA if configured)
        if (HAL_ADC_PollForConversion(&hadc1, 10) == HAL_OK) {
            adcValue = HAL_ADC_GetValue(&hadc1);

            // Map ADC value to Timer Period
            uint32_t period = (adcValue * 1000 / 4095) + 100; // Period in ms (100 - 1100ms)
            __HAL_TIM_SET_AUTORELOAD(&htim2, period - 1);
        }
    }
}

// Timer Interrupt Callback
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
    if (htim->Instance == TIM2) {
        HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_1); // Toggle LED pin
    }
}

/* ADC1 Initialization Function */
static void MX_ADC1_Init(void) {
    ADC_ChannelConfTypeDef sConfig = {0};

    hadc1.Instance = ADC1;
    hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
    hadc1.Init.ContinuousConvMode = ENABLE;
    hadc1.Init.DiscontinuousConvMode = DISABLE;
    hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    hadc1.Init.NbrOfConversion = 1;
    HAL_ADC_Init(&hadc1);

    sConfig.Channel = ADC_CHANNEL_0;
    sConfig.Rank = 1;
    sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
    HAL_ADC_ConfigChannel(&hadc1, &sConfig);
}

/* TIM2 Initialization Function */
static void MX_TIM2_Init(void) {
    htim2.Instance = TIM2;
    htim2.Init.Prescaler = 64000 - 1; // 1 ms resolution (assuming 64 MHz clock)
    htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim2.Init.Period = 1000 - 1;    // Default 1-second period
    htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
    HAL_TIM_Base_Init(&htim2);

    HAL_NVIC_SetPriority(TIM2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(TIM2_IRQn);
}

/* GPIO Initialization Function */
static void MX_GPIO_Init(void) {
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    __HAL_RCC_GPIOA_CLK_ENABLE();

    // Configure LED pin
    GPIO_InitStruct.Pin = GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void TIM2_IRQHandler(void) {
    HAL_TIM_IRQHandler(&htim2);
}