/**
  @page ADC_SingleConversion_TriggerSW_IT ADC example
  
  @verbatim
  ******************************************************************************
  * @file    Examples/ADC/ADC_SingleConversion_TriggerSW_IT/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the ADC_SingleConversion_TriggerSW_IT example.
  ******************************************************************************
  *
  * Copyright (c) 2019 STMicroelectronics. All rights reserved.
  *
  * 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
  *
  ******************************************************************************
  @endverbatim

@par Example Description
Use ADC to convert a single channel at each SW start, 
conversion performed using programming model: interrupt 

Example configuration:
ADC is configured to convert a single channel, in single conversion mode,
from SW trigger.
ADC interruption enabled: EOC (end of conversion of ADC group regular).

Example execution:
The ADC performs 1 conversion of the selected channel. When conversion is completed,
ADC interruption occurs. IRQ handler callback function reads conversion data from
ADC data register and stores it into a variable, LED2 is turned on.

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:
None.
Note: Optionally, a voltage can be supplied to the analog input pin (cf pin below),
      between 0V and Vdda=3.3V, to perform a ADC conversion on a determined
      voltage level.
      Otherwise, this pin can be let floating (in this case ADC conversion data
      will be undetermined).

Other peripherals used:
  1 GPIO for LED
  1 GPIO for analog input: PA4 (Arduino connector CN8 pin A0, Morpho connector CN7 pin 28)

Board settings:
 - ADC is configured to convert ADC_CHANNEL_9 (Arduino connector CN8 pin A0, Morpho connector CN7 pin 28).
 - The voltage input on ADC channel must be provided by an external source connected to Arduino connector CN8 pin A0, Morpho connector CN7 pin 28.


To observe voltage level applied on ADC channel through GPIO, connect a voltmeter on
pin PA4 (Arduino connector CN8 pin A0, Morpho connector CN7 pin 28).

NUCLEO-WB35CE board LED is be used to monitor the program execution status:
 - Normal operation: LED2 is turned-on/off in function of ADC conversion
   result.
    - "On" upon conversion completion
    - "Off" during conversion
 - Error: In case of error, LED2 is toggling twice at a frequency of 1Hz.

@par Keywords

Analog, ADC, Analog to Digital, single conversion, Software trigger, interrupt.

@par Directory contents 

  - ADC/ADC_SingleConversion_TriggerSW_IT/Inc/stm32wbxx_hal_conf.h    HAL configuration file
  - ADC/ADC_SingleConversion_TriggerSW_IT/Inc/stm32wbxx_it.h          Interrupt handlers header file
  - ADC/ADC_SingleConversion_TriggerSW_IT/Inc/main.h                        Header for main.c module  
  - ADC/ADC_SingleConversion_TriggerSW_IT/Src/stm32wbxx_it.c          Interrupt handlers
  - ADC/ADC_SingleConversion_TriggerSW_IT/Src/main.c                        Main program
  - ADC/ADC_SingleConversion_TriggerSW_IT/Src/stm32wbxx_hal_msp.c     HAL MSP module
  - ADC/ADC_SingleConversion_TriggerSW_IT/Src/system_stm32wbxx.c      STM32WBxx system source file


@par Hardware and Software environment

  - This example runs on STM32WB35xx devices.
    
  - This example has been tested with NUCLEO-WB35CE 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>
 */
