#include <stdio.h>
#include <string.h>
#include "stm32l0xx_hal.h"

ADC_HandleTypeDef hadc;
DMA_HandleTypeDef hdma_adc;
TIM_HandleTypeDef htim2; 
UART_HandleTypeDef huart2;
uint32_t adc_deger = 0;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_ADC_Init(void);
static void MX_TIM2_Init(void);
static void MX_USART2_UART_Init(void);

int main(void) {
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_ADC_Init();
    MX_TIM2_Init();
    MX_USART2_UART_Init();

    HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2); 
    HAL_ADC_Start_DMA(&hadc, &adc_deger, 1);

    while (1) {
        uint32_t pwm_val = (adc_deger * 1000) / 4095;
        
        // Arkadasinin ekranindaki gibi raporlama
        if (adc_deger >= 3000) printf("Sensor: %lu | Durum: KRITIK\r\n", adc_deger);
        else if (adc_deger >= 1000) printf("Sensor: %lu | Durum: UYARI\r\n", adc_deger);
        else printf("Sensor: %lu | Durum: NORMAL\r\n", adc_deger);
        
        __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_2, pwm_val);
        HAL_Delay(250);
    }
}

static void MX_ADC_Init(void) {
    hadc.Instance = ADC1;
    hadc.Init.Resolution = ADC_RESOLUTION_12B;
    hadc.Init.ContinuousConvMode = ENABLE;
    hadc.Init.DMAContinuousRequests = ENABLE;
    HAL_ADC_Init(&hadc);
    ADC_ChannelConfTypeDef sCh = {0};
    sCh.Channel = ADC_CHANNEL_0;
    sCh.Rank = ADC_RANK_CHANNEL_NUMBER;
    HAL_ADC_ConfigChannel(&hadc, &sCh);
}

static void MX_TIM2_Init(void) {
    htim2.Instance = TIM2;
    htim2.Init.Prescaler = 31;
    htim2.Init.Period = 1000;
    HAL_TIM_PWM_Init(&htim2);
    TIM_OC_InitTypeDef sOC = {0};
    sOC.OCMode = TIM_OCMODE_PWM1;
    sOC.Pulse = 0; 
    HAL_TIM_PWM_ConfigChannel(&htim2, &sOC, TIM_CHANNEL_2);
}

static void MX_USART2_UART_Init(void) {
    huart2.Instance = USART2;
    huart2.Init.BaudRate = 115200;
    HAL_UART_Init(&huart2);
}

int _write(int file, char *ptr, int len) {
    HAL_UART_Transmit(&huart2, (uint8_t*)ptr, len, HAL_MAX_DELAY);
    return len;
}

static void MX_DMA_Init(void) { __HAL_RCC_DMA1_CLK_ENABLE(); }
static void MX_GPIO_Init(void) { __HAL_RCC_GPIOA_CLK_ENABLE(); }
void SystemClock_Config(void) {}