text: /**
    ******************************************************************************
    * @file    Templates_LL/Src/main.c
    * @author  MCD Application Team
    * @brief   Main program body through the LL API
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
    *
    * 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"
  
  /** @addtogroup STM32F4xx_LL_Examples
    * @{
    */
  
  /** @addtogroup Templates_LL
    * @{
    */
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  void     SystemClock_Config(void);
  
  /* Private functions ---------------------------------------------------------*/
  
  /**
    * @brief  Main program
    * @param  None
    * @retval None
    */
  int main(void)
  {
    /* Configure the system clock to 100 MHz */
    SystemClock_Config();
    
    /* Add your application code here */
    
    
    /* Infinite loop */
    while (1)
    {
    }
  }
  
  /* ==============   BOARD SPECIFIC CONFIGURATION CODE BEGIN    ============== */
  /**
    * @brief  System Clock Configuration
    *         The system Clock is configured as follow :
    *            System Clock source            = PLL (HSI)
    *            SYSCLK(Hz)                     = 100000000
    *            HCLK(Hz)                       = 100000000
    *            AHB Prescaler                  = 1
    *            APB1 Prescaler                 = 2
    *            APB2 Prescaler                 = 1
    *            HSE Frequency(Hz)              = 16000000
    *            PLL_M                          = 16
    *            PLL_N                          = 200
    *            PLL_P                          = 2
    *            VDD(V)                         = 3.3
    *            Main regulator output voltage  = Scale1 mode
    *            Flash Latency(WS)              = 5
    * @param  None
    * @retval None
    */
  void SystemClock_Config(void)
  {
    /* Enable HSI oscillator */
    LL_RCC_HSI_Enable();
    while(LL_RCC_HSI_IsReady() != 1)
    {
    };
  
    /* Set FLASH latency */
    LL_FLASH_SetLatency(LL_FLASH_LATENCY_5);
  
    /* Main PLL configuration and activation */
    LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_16, 200, LL_RCC_PLLP_DIV_2);
    LL_RCC_PLL_Enable();
    while(LL_RCC_PLL_IsReady() != 1)
    {
    };
  
    /* Sysclk activation on the main PLL */
    LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
    LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
    while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
    {
    };
  
    /* Set APB1 & APB2 prescaler */
    LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
    LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
  
    /* Set systick to 1ms */
    SysTick_Config(100000000 / 1000);
  
    /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
    SystemCoreClock = 100000000;
  }
  
  /* ==============   BOARD SPECIFIC CONFIGURATION CODE END      ============== */
  
  #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 can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d", file, line) */
  
    /* Infinite loop */
    while (1)
    {
    }
  }
  #endif
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  