/**
  @page Templates_LL  Description of the Templates_LL example
  
  @verbatim
  ******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
  * @file    Templates_LL/readme.txt 
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    14-April-2017
  * @brief   Description of the Templates_LL example.
  ******************************************************************************
  *
  * 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.
  *
  ******************************************************************************
  @endverbatim

@par Example Description

This projects provides a reference template through the LL API that can be used to build any firmware application.

This project LL template provides:
 - Inclusion of all LL drivers (include files in "main.h" and LL sources files in IDE environment, with option "USE_FULL_LL_DRIVER" in IDE environment)
   Note: If optimization is needed afterwards, user can perform a cleanup by removing unused drivers.
 - Definition of LEDs and user button (file: main.h)
   Note: User button name printed on board may differ from naming "user button" in code: "key button", ...
 - Clock configuration (file: main.c)

This project LL template does not provide:
 - Functions to initialize and control LED and user button
 - Functions to manage IRQ handler of user button

To port a LL example to the targeted board:
1. Select the LL example to port.
   To find the board on which LL examples are deployed, refer to LL examples list in "STM32CubeProjectsList.html", table section "Examples_LL"
   or AN4724: STM32Cube firmware examples for STM32F1 Series

2. Replace source files of the LL template by the ones of the LL example, except code specific to board.
   Note: Code specific to board is specified between tags:
         /* ==============   BOARD SPECIFIC CONFIGURATION CODE BEGIN    ============== */
         /* ==============   BOARD SPECIFIC CONFIGURATION CODE END      ============== */
         
   - Replace file main.h, with updates:
     - Keep LED and user button definition of the LL template under tags
    
   - Replace file main.c, with updates:
     - Keep clock configuration of the LL template: function "SystemClock_Config()"
     - Depending of LED availability, replace LEDx_PIN by another LEDx (number) available in file main.h
     
   - Replace file stm32f1xx_it.h
   - Replace file stm32f1xx_it.c

@par Keywords

Reference, Templates_LL

@par Directory contents 

  - Templates_LL/Inc/stm32f1xx_it.h          Interrupt handlers header file
  - Templates_LL/Inc/main.h                  Header for main.c module
  - Templates_LL/Inc/stm32_assert.h          Template file to include assert_failed function
  - Templates_LL/Src/stm32f1xx_it.c          Interrupt handlers
  - Templates_LL/Src/main.c                  Main program
  - Templates_LL/Src/system_stm32f1xx.c      STM32f1x system source file


@par Hardware and Software environment

  - This template runs on STM32F107xC devices.
    
  - This template has been tested with STM3210C-EVAL RevC board and can be
    easily tailored to any other supported device and development board.


@par How to use it ? 

In order to make the program work, you must do the following :
 - Open your preferred toolchain
 - Rebuild all files and load your image into target memory
 - Run the example

 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */
