text: /* USER CODE BEGIN Header */
  /**
    ******************************************************************************
    * @file           : main.c
    * @brief          : Main program body
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
    * All rights reserved.</center></h2>
    *
    * This software component is licensed by ST under BSD 3-Clause license,
    * the "License"; You may not use this file except in compliance with the
    * License. You may obtain a copy of the License at:
    *                        opensource.org/licenses/BSD-3-Clause
    *
    ******************************************************************************
    */
  /* USER CODE END Header */
  /* Includes ------------------------------------------------------------------*/
  #include "main.h"
  #include "usb_device.h"
  
  /* Private includes ----------------------------------------------------------*/
  /* USER CODE BEGIN Includes */
  #include <Console/console.h>
  #include <HID/keystroke.h>
  #include <HID/mouse.h>
  /* USER CODE END Includes */
  
  /* Private typedef -----------------------------------------------------------*/
  /* USER CODE BEGIN PTD */
  
  /* USER CODE END PTD */
  
  /* Private define ------------------------------------------------------------*/
  /* USER CODE BEGIN PD */
  #define FLAG_MASK_USB_DEMO 0x01
  	// 0x01 - USB demo button flag
  #define FLAG_MASK_LED_TOGGLE 0x02
  	// 0x02 - LED toggle timer flag
  #define FLAG_MASK_FLUSH_KEYS 0x04
  	// 0x04 - Flush key buffer timer flag
  #define FLAG_MASK_SEND_MOUSE 0x08
  	// 0x08 - Send mouse state (if fresh) flag
  	// 0x?? - undefined
  /* USER CODE END PD */
  
  /* Private macro -------------------------------------------------------------*/
  /* USER CODE BEGIN PM */
  
  /* USER CODE END PM */
  
  /* Private variables ---------------------------------------------------------*/
  
  TIM_HandleTypeDef htim2;
  TIM_HandleTypeDef htim4;
  
  /* USER CODE BEGIN PV */
  volatile uint8_t flags = 0; // shared flag byte could cause race conditions
  /* USER CODE END PV */
  
  /* Private function prototypes -----------------------------------------------*/
  void SystemClock_Config(void);
  static void MX_GPIO_Init(void);
  static void MX_TIM2_Init(void);
  static void MX_TIM4_Init(void);
  /* USER CODE BEGIN PFP */
  void ProcessUsbDemo(void);
  /* USER CODE END PFP */
  
  /* Private user code ---------------------------------------------------------*/
  /* USER CODE BEGIN 0 */
  
  /* USER CODE END 0 */
  
  /**
    * @brief  The application entry point.
    * @retval int
    */
  int main(void)
  {
    /* USER CODE BEGIN 1 */
  
    /* USER CODE END 1 */
  
    /* MCU Configuration--------------------------------------------------------*/
  
    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    HAL_Init();
  
    /* USER CODE BEGIN Init */
  
    /* USER CODE END Init */
  
    /* Configure the system clock */
    SystemClock_Config();
  
    /* USER CODE BEGIN SysInit */
  
    /* USER CODE END SysInit */
  
    /* Initialize all configured peripherals */
    MX_GPIO_Init();
    MX_USB_DEVICE_Init();
    MX_TIM2_Init();
    MX_TIM4_Init();
    /* USER CODE BEGIN 2 */
    ConsoleInit();
    // Start timer
    HAL_TIM_Base_Start_IT(&htim2);
    HAL_TIM_Base_Start_IT(&htim4);
    /* USER CODE END 2 */
  
    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    {
      /* USER CODE END WHILE */
  
      /* USER CODE BEGIN 3 */
  	  ConsoleProcess();
  	  ProcessUsbDemo();
  
  	  if (flags & FLAG_MASK_LED_TOGGLE)
  	  {
  		  HAL_GPIO_TogglePin(GPIOB, LD2_Pin);
  		  flags &= ~FLAG_MASK_LED_TOGGLE;
  	  }
  
  	  if (flags & FLAG_MASK_FLUSH_KEYS)
  	  {
  		  (void) FlushKeyQueue();
  		  flags &= ~FLAG_MASK_FLUSH_KEYS;
  	  }
  
  	  if (flags & FLAG_MASK_SEND_MOUSE)
  	  {
  		  (void) MouseSendFreshState();
  		  flags &= ~FLAG_MASK_SEND_MOUSE;
  	  }
    }
    /* USER CODE END 3 */
  }
  
  /**
    * @brief System Clock Configuration
    * @retval None
    */
  void SystemClock_Config(void)
  {
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
  
    /** Configure LSE Drive Capability
    */
    HAL_PWR_EnableBkUpAccess();
    /** Configure the main internal regulator output voltage
    */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
    /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 4;
    RCC_OscInitStruct.PLL.PLLN = 96;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 4;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
      Error_Handler();
    }
    /** Activate the Over-Drive mode
    */
    if (HAL_PWREx_EnableOverDrive() != 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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
    {
      Error_Handler();
    }
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_UART4|RCC_PERIPHCLK_CLK48;
    PeriphClkInitStruct.Uart4ClockSelection = RCC_UART4CLKSOURCE_PCLK1;
    PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48SOURCE_PLL;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }
  }
  
  /**
    * @brief TIM2 Initialization Function
    * @param None
    * @retval None
    */
  static void MX_TIM2_Init(void)
  {
  
    /* USER CODE BEGIN TIM2_Init 0 */
  
    /* USER CODE END TIM2_Init 0 */
  
    TIM_ClockConfigTypeDef sClockSourceConfig = {0};
    TIM_MasterConfigTypeDef sMasterConfig = {0};
  
    /* USER CODE BEGIN TIM2_Init 1 */
  
    /* USER CODE END TIM2_Init 1 */
    htim2.Instance = TIM2;
    htim2.Init.Prescaler = 960-1;
    htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim2.Init.Period = 5000-1;
    htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
    {
      Error_Handler();
    }
    sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
    {
      Error_Handler();
    }
    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
    {
      Error_Handler();
    }
    /* USER CODE BEGIN TIM2_Init 2 */
  
    /* USER CODE END TIM2_Init 2 */
  
  }
  
  /**
    * @brief TIM4 Initialization Function
    * @param None
    * @retval None
    */
  static void MX_TIM4_Init(void)
  {
  
    /* USER CODE BEGIN TIM4_Init 0 */
  
    /* USER CODE END TIM4_Init 0 */
  
    TIM_ClockConfigTypeDef sClockSourceConfig = {0};
    TIM_MasterConfigTypeDef sMasterConfig = {0};
  
    /* USER CODE BEGIN TIM4_Init 1 */
  
    /* USER CODE END TIM4_Init 1 */
    htim4.Instance = TIM4;
    htim4.Init.Prescaler = 1465-1;
    htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim4.Init.Period = 65535;
    htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim4.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    if (HAL_TIM_Base_Init(&htim4) != HAL_OK)
    {
      Error_Handler();
    }
    sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    if (HAL_TIM_ConfigClockSource(&htim4, &sClockSourceConfig) != HAL_OK)
    {
      Error_Handler();
    }
    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)
    {
      Error_Handler();
    }
    /* USER CODE BEGIN TIM4_Init 2 */
  
    /* USER CODE END TIM4_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_GPIOH_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOG_CLK_ENABLE();
  
    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOB, LD1_Pin|LD3_Pin|LD2_Pin, GPIO_PIN_RESET);
  
    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(USB_PowerSwitchOn_GPIO_Port, USB_PowerSwitchOn_Pin, GPIO_PIN_RESET);
  
    /*Configure GPIO pin : USER_Btn_Pin */
    GPIO_InitStruct.Pin = USER_Btn_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(USER_Btn_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pins : RMII_MDC_Pin RMII_RXD0_Pin RMII_RXD1_Pin */
    GPIO_InitStruct.Pin = RMII_MDC_Pin|RMII_RXD0_Pin|RMII_RXD1_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  
    /*Configure GPIO pins : RMII_REF_CLK_Pin RMII_MDIO_Pin RMII_CRS_DV_Pin */
    GPIO_InitStruct.Pin = RMII_REF_CLK_Pin|RMII_MDIO_Pin|RMII_CRS_DV_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  
    /*Configure GPIO pins : LD1_Pin LD3_Pin LD2_Pin */
    GPIO_InitStruct.Pin = LD1_Pin|LD3_Pin|LD2_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  
    /*Configure GPIO pin : RMII_TXD1_Pin */
    GPIO_InitStruct.Pin = RMII_TXD1_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(RMII_TXD1_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pins : STLK_RX_Pin STLK_TX_Pin */
    GPIO_InitStruct.Pin = STLK_RX_Pin|STLK_TX_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
  
    /*Configure GPIO pin : USB_PowerSwitchOn_Pin */
    GPIO_InitStruct.Pin = USB_PowerSwitchOn_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(USB_PowerSwitchOn_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pin : USB_OverCurrent_Pin */
    GPIO_InitStruct.Pin = USB_OverCurrent_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(USB_OverCurrent_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pins : RMII_TX_EN_Pin RMII_TXD0_Pin */
    GPIO_InitStruct.Pin = RMII_TX_EN_Pin|RMII_TXD0_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF11_ETH;
    HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
  
    /* EXTI interrupt init*/
    HAL_NVIC_SetPriority(EXTI15_10_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
  
  }
  
  /* USER CODE BEGIN 4 */
  
  /**
   * GPIO Int callback
   * GPIO_PIN_13 is the user button on f7 nucleo64
   */
  void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
  {
  	if (GPIO_Pin == GPIO_PIN_13)
  	{
  		flags |= FLAG_MASK_USB_DEMO;
  	}
  }
  
  const char demo_text[22] = "USB HID demo text 100\n";
  /**
   * 	Run usb demo if flag set
   */
  void ProcessUsbDemo()
  {
  	if ( flags & FLAG_MASK_USB_DEMO )
  	{
  
  		USB_Keyboard_SendString((char *) demo_text);
  		flags &= ~FLAG_MASK_USB_DEMO;
  	}
  }
  
  /**
   * Handle timer period interrupt callbacks
   * Overrides stm32f7xx_hal_tim.c:HAL_TIM_PeriodElapsedCallback
   */
  void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
  {
  	if (&htim2 == htim)
  	{
  		flags |= (FLAG_MASK_FLUSH_KEYS | FLAG_MASK_SEND_MOUSE);
  	}
  	else if (&htim4 == htim)
  	{
  		flags |= FLAG_MASK_LED_TOGGLE;
  	}
  }
  /* USER CODE END 4 */
  
  /**
    * @brief  This function is executed in case of error occurrence.
    * @retval None
    */
  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 */
  }
  
  #ifdef  USE_FULL_ASSERT
  /**
    * @brief  Reports the name of the source file and the source line number
    *         where the assert_param error has occurred.
    * @param  file: pointer to the source file name
    * @param  line: assert_param error line source number
    * @retval None
    */
  void assert_failed(uint8_t *file, uint32_t line)
  {
    /* USER CODE BEGIN 6 */
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
    /* USER CODE END 6 */
  }
  #endif /* USE_FULL_ASSERT */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  