#include "main.h"

UART_HandleTypeDef huart1;

uint8_t ledState[3] = {0};    // 1 - on, 0 - off

uint8_t flag_key1_press = 1;
uint32_t debounce_time = 0;


/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);

static void MX_USART1_UART_Init(void);

int main(void)
{
  
  HAL_Init();
  /* Configure the system clock */
  SystemClock_Config();
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_USART1_UART_Init();
  
  while (1)  {
    // Green button pressed
    if (HAL_GPIO_ReadPin(GPIOC, User_Button_Green_Pin) == GPIO_PIN_SET) {
      HAL_GPIO_WritePin(GPIOA, Led_Green_Pin, GPIO_PIN_SET);
      ledState[0] = !ledState[0];
      HAL_Delay(10);
      //while (HAL_GPIO_ReadPin(GPIOC, User_Button_Green_Pin) == GPIO_PIN_SET){}
    } 
    else {
      HAL_GPIO_WritePin(GPIOA, Led_Green_Pin, GPIO_PIN_RESET);
    }   
    // Red button pressed 
    if (HAL_GPIO_ReadPin(GPIOC, User_Button_Red_Pin) == GPIO_PIN_SET) {
      HAL_GPIO_WritePin(GPIOA, Led_Red_Pin, ledState[1]);
      ledState[1] = !ledState[1];
      HAL_Delay(10);

      //while (HAL_GPIO_ReadPin(GPIOC, User_Button_Red_Pin) == GPIO_PIN_SET){}
    }
    else {
      HAL_GPIO_WritePin(GPIOA, Led_Red_Pin, GPIO_PIN_RESET);
    }  
    // Blue button pressed
    if (HAL_GPIO_ReadPin(GPIOC, User_Button_Blue_Pin) == GPIO_PIN_SET) {
      HAL_GPIO_WritePin(GPIOA, Led_Blue_Pin, ledState[2]);
      ledState[2] = !ledState[2];
      HAL_Delay(10);

      //while (HAL_GPIO_ReadPin(GPIOC, User_Button_Blue_Pin) == GPIO_PIN_SET){}
    }
    else {
      HAL_GPIO_WritePin(GPIOA, Led_Blue_Pin, GPIO_PIN_RESET);
    }  
  }
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV1;

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



/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART1_UART_Init(void)
{

  /* USER CODE BEGIN USART1_Init 0 */

  /* USER CODE END USART1_Init 0 */

  /* USER CODE BEGIN USART1_Init 1 */

  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart1, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart1, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */

  /* USER CODE END USART1_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(Led_GPIO_Port, Led_Green_Pin, GPIO_PIN_RESET);
  HAL_GPIO_WritePin(Led_GPIO_Port, Led_Blue_Pin, GPIO_PIN_RESET);
  HAL_GPIO_WritePin(Led_GPIO_Port, Led_Red_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin : User_Button_Green_Pin */
  GPIO_InitStruct.Pin = User_Button_Green_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(User_Button_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : User_Button_Blue_Pin */
  GPIO_InitStruct.Pin = User_Button_Blue_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(User_Button_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : User_Button_Red_Pin */
  GPIO_InitStruct.Pin = User_Button_Red_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(User_Button_GPIO_Port, &GPIO_InitStruct);

  /*Configure GPIO pin : Led_Red_Pin */
  GPIO_InitStruct.Pin = Led_Red_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

   /*Configure GPIO pin : Led_Blue_Pin */
  GPIO_InitStruct.Pin = Led_Blue_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : Led_Green_Pin */
  GPIO_InitStruct.Pin = Led_Green_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  HAL_GPIO_Init(Led_GPIO_Port, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI4_15_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);

}


void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}