/**
  @page ADC_ContinuousConversion_TriggerSW ADC example
  
  @verbatim
  ******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
  * @file    Examples_LL/ADC/ADC_ContinuousConversion_TriggerSW/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the ADC_ContinuousConversion_TriggerSW 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 example describes how to use a ADC peripheral to perform
continuous ADC conversions of a channel, from a SW start; 
This example is based on the STM32F2xx ADC LL API; 
peripheral initialization done using LL unitary services functions
for optimization purpose (performance and size).

Example configuration:
ADC is configured to convert a single channel, in continuous conversion mode,
from SW trigger.

Example execution:
From the first press on User Button, the ADC converts the selected channel
continuously.
After the first trigger (software start in this example), following conversions
are launched successively automatically, indefinitely.
Software polls for the first conversion completion
and stores it into a variable, LED1 is turned on.
Main program reads frequently ADC conversion data 
(without waiting for end of each conversion: software reads data 
when main program execution pointer is available and can let 
some ADC conversions data unread and overwritten by newer data)
and stores it into the same variable.

For debug: variables to monitor with debugger watch window:
 - "uhADCxConvertedData": ADC group regular conversion data
 - "uhADCxConvertedData_Voltage_mVolt": ADC conversion data computation to physical values

Connection needed:
Use an external power supply, adjust supply voltage and connect it to analog input pin (cf pin below).

Other peripherals used:
  1 GPIO for User Button
  1 GPIO for LED1
  1 GPIO for analog input: PA.04 ( connector CN7 pin 17)

@par Directory contents 

  - ADC/ADC_ContinuousConversion_TriggerSW/Inc/stm32f2xx_it.h          Interrupt handlers header file
  - ADC/ADC_ContinuousConversion_TriggerSW/Inc/main.h                  Header for main.c module
  - ADC/ADC_ContinuousConversion_TriggerSW/Inc/stm32_assert.h          Template file to include assert_failed function
  - ADC/ADC_ContinuousConversion_TriggerSW/Src/stm32f2xx_it.c          Interrupt handlers
  - ADC/ADC_ContinuousConversion_TriggerSW/Src/main.c                  Main program
  - ADC/ADC_ContinuousConversion_TriggerSW/Src/system_stm32f2xx.c      STM32F2xx system source file


@par Hardware and Software environment

  - This example runs on STM32F207xx devices.
    
  - This example has been tested with NUCLEO-F207ZG 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>
 */
