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#include "main.h"
#include "stm32h7xx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

TIM_HandleTypeDef htim6;
UART_HandleTypeDef huart3;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART3_UART_Init(void);
static void MX_TIM6_Init(void);

int light_level = 100; // Simulated light level (0-100)
int car_moving = 0; // 0: stopped, 1: moving
char buffer[50];
char user_input;

int main(void) {
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_USART3_UART_Init();
  MX_TIM6_Init();

  HAL_UART_Transmit(&huart3, (uint8_t *)"Do you want to start the system? Y/N\r\n", 38, 10);

  while (1) {
    HAL_UART_Receive(&huart3, (uint8_t *)&user_input, 1, HAL_MAX_DELAY);

    if (user_input == 'Y' || user_input == 'y') {
      HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_0); // Toggle LED2
      HAL_UART_Transmit(&huart3, (uint8_t *)"System power on\r\n", 17, 10);
      HAL_TIM_Base_Start_IT(&htim6);
    }
    if (user_input == 'N' || user_input == 'n') {
      HAL_UART_Transmit(&huart3, (uint8_t *)"System is on Standby mode. Press Y to start the system\r\n", 55, 10);
    } else {
      HAL_UART_Transmit(&huart3, (uint8_t *)"Invalid cmd\r\n", 13, 10);
    }
    user_input = '\0'; // Reset user_input after processing
  }
}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
  if (htim == &htim6) {
    // Simulate light level change
    light_level -= 10;
    if (light_level < 0) light_level = 100;

    int length = sprintf(buffer, "Light level: %d\r\n", light_level);
    buffer[length] = '\0';
    HAL_UART_Transmit(&huart3, (uint8_t *)buffer, strlen(buffer), 10);

    if (light_level < 30) {
      HAL_UART_Transmit(&huart3, (uint8_t *)"It's getting dark, turning on headlights\r\n", 42, 10);
      HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET); // Turn on headlights
    } else {
      HAL_UART_Transmit(&huart3, (uint8_t *)"It's bright, turning off headlights\r\n", 38, 10);
      HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET); // Turn off headlights
    }

    // Check for user override
    HAL_UART_Transmit(&huart3, (uint8_t *)"Override headlights? Y/N\r\n", 26, 10);
    HAL_UART_Receive(&huart3, (uint8_t *)&user_input, 1, HAL_MAX_DELAY);

    if (user_input == 'Y' || user_input == 'y') {
      HAL_UART_Transmit(&huart3, (uint8_t *)"Headlights manually turned on\r\n", 31, 10);
      HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_SET); // Turn on headlights
    } 
    if (user_input == 'N' || user_input == 'n') {
      if (car_moving) {
        HAL_UART_Transmit(&huart3, (uint8_t *)"Cannot turn off headlights while moving\r\n", 42, 10);
      } else {
        HAL_UART_Transmit(&huart3, (uint8_t *)"Headlights manually turned off\r\n", 32, 10);
        HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET); // Turn off headlights
      }
    } else {
      HAL_UART_Transmit(&huart3, (uint8_t *)"Invalid cmd\r\n", 13, 10);
    }
    user_input = '\0'; // Reset user_input after processing
  }
}
void SystemClock_Config(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /*AXI clock gating */
  RCC->CKGAENR = 0xFFFFFFFF;

  /** Supply configuration update enable
   */
  HAL_PWREx_ConfigSupply(PWR_DIRECT_SMPS_SUPPLY);

  /** Configure the main internal regulator output voltage
   */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);

  while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {
  }

  /** Initializes the RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
  RCC_OscInitStruct.OscillatorType =
      RCC_OSCILLATORTYPE_HSI48 | RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 1;
  RCC_OscInitStruct.PLL.PLLN = 20;
  RCC_OscInitStruct.PLL.PLLP = 2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  RCC_OscInitStruct.PLL.PLLR = 2;
  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
  RCC_OscInitStruct.PLL.PLLFRACN = 0;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
   */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK |
                                RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 |
                                RCC_CLOCKTYPE_D3PCLK1 | RCC_CLOCKTYPE_D1PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV1;
  RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
    Error_Handler();
  }
}

/**
 * @brief TIM6 Initialization Function
 * @param None
 * @retval None
 */
static void MX_TIM6_Init(void) {

  /* USER CODE BEGIN TIM6_Init 0 */

  /* USER CODE END TIM6_Init 0 */

  TIM_MasterConfigTypeDef sMasterConfig = {0};

  /* USER CODE BEGIN TIM6_Init 1 */

  /* USER CODE END TIM6_Init 1 */
  htim6.Instance = TIM6;
  htim6.Init.Prescaler = 40000;
  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim6.Init.Period = 6000 - 1;
  htim6.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim6) != HAL_OK) {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK) {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM6_Init 2 */

  /* USER CODE END TIM6_Init 2 */
}

/**
 * @brief USART3 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART3_UART_Init(void) {

  /* USER CODE BEGIN USART3_Init 0 */

  /* USER CODE END USART3_Init 0 */

  /* USER CODE BEGIN USART3_Init 1 */

  /* USER CODE END USART3_Init 1 */
  huart3.Instance = USART3;
  huart3.Init.BaudRate = 115200;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart3.Init.OverSampling = UART_OVERSAMPLING_16;
  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart3) != HAL_OK) {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) !=
      HAL_OK) {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) !=
      HAL_OK) {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK) {
    Error_Handler();
  }
  /* USER CODE BEGIN USART3_Init 2 */

  /* USER CODE END USART3_Init 2 */
}

/**
 * @brief USB_OTG_HS Initialization Function
 * @param None
 * @retval None
 */