/**

   ******************************************************************************

   * File Name          : main.c

   * Description        : Main program body

   ******************************************************************************

   ** This notice applies to any and all portions of this file

   * that are not between comment pairs USER CODE BEGIN and

   * USER CODE END. Other portions of this file, whether

   * inserted by the user or by software development tools

   * are owned by their respective copyright owners.

   *

   * COPYRIGHT(c) 2017 STMicroelectronics

   *

   * Redistribution and use in source and binary forms, with or without modification,

   * are permitted provided that the following conditions are met:

   *   1. Redistributions of source code must retain the above copyright notice,

   *      this list of conditions and the following disclaimer.

   *   2. Redistributions in binary form must reproduce the above copyright notice,

   *      this list of conditions and the following disclaimer in the documentation

   *      and/or other materials provided with the distribution.

   *   3. Neither the name of STMicroelectronics nor the names of its contributors

   *      may be used to endorse or promote products derived from this software

   *      without specific prior written permission.

   *

   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

   *

   ******************************************************************************

   */

 /* Includes ------------------------------------------------------------------*/

 #include "main.h"

 #include "stm32f1xx_hal.h"

 /* USER CODE BEGIN Includes */

 /* USER CODE END Includes */

 /* Private variables ---------------------------------------------------------*/

 /* USER CODE BEGIN PV */

 /* Private variables ---------------------------------------------------------*/

 /* USER CODE END PV */

 /* Private function prototypes -----------------------------------------------*/

 void SystemClock_Config(void);

 static void MX_GPIO_Init(void);

 /* USER CODE BEGIN PFP */

 /* Private function prototypes -----------------------------------------------*/

 /* USER CODE END PFP */

 /* USER CODE BEGIN 0 */

 /* USER CODE END 0 */

 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();

   /* USER CODE BEGIN 2 */

   /* USER CODE END 2 */

   /* Infinite loop */

   /* USER CODE BEGIN WHILE */

     /*下面一行代码需要自己敲的*/

     //意思是给PB5端口低电平，记住这个函数哦

         HAL_GPIO_WritePin(GPIOB,GPIO_PIN_5,GPIO_PIN_RESET);    

   while ()

   {

   /* USER CODE END WHILE */

   /* USER CODE BEGIN 3 */

   }

   /* USER CODE END 3 */

 }

 /** System Clock Configuration

 */

 void SystemClock_Config(void)

 {

   RCC_OscInitTypeDef RCC_OscInitStruct;

   RCC_ClkInitTypeDef RCC_ClkInitStruct;

     /**Initializes the CPU, AHB and APB busses clocks

     */

   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

   RCC_OscInitStruct.HSIState = RCC_HSI_ON;

   RCC_OscInitStruct.HSICalibrationValue = ;

   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

   {

     _Error_Handler(__FILE__, __LINE__);

   }

     /**Initializes the CPU, AHB and APB busses clocks

     */

   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;

   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;

   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)

   {

     _Error_Handler(__FILE__, __LINE__);

   }

     /**Configure the Systick interrupt time

     */

   HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/);

     /**Configure the Systick

     */

   HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

   /* SysTick_IRQn interrupt configuration */

   HAL_NVIC_SetPriority(SysTick_IRQn, , );

 }

 /** Configure pins as

         * Analog

         * Input

         * Output

         * EVENT_OUT

         * EXTI

 */

 static void MX_GPIO_Init(void)

 {

   GPIO_InitTypeDef GPIO_InitStruct;

   /* GPIO Ports Clock Enable */

   __HAL_RCC_GPIOB_CLK_ENABLE();

   /*Configure GPIO pin Output Level */

   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET);

   /*Configure GPIO pin : PB5 */

   GPIO_InitStruct.Pin = GPIO_PIN_5;

   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;

   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;

   HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

 }

 /* USER CODE BEGIN 4 */

 /* USER CODE END 4 */

 /**

   * @brief  This function is executed in case of error occurrence.

   * @param  None

   * @retval None

   */

 void _Error_Handler(char * file, int line)

 {

   /* USER CODE BEGIN Error_Handler_Debug */

   /* User can add his own implementation to report the HAL error return state */

   while()

   {

   }

   /* 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

 /**

   * @}

   */ 

 /**

   * @}

 */ 

 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/