/**
  @page ADC_RegularConversion_Interrupt conversion using Interrupt example

  @verbatim
  ******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
  * @file    ADC/ADC_RegularConversion_Interrupt/Readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the ADC RegularConversion Interrupt example.
  ******************************************************************************
  *
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  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
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  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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  ******************************************************************************
  @endverbatim

@par Example Description 

This example describes how to use the ADC in interrupt mode to convert data through the HAL API.

This example describes how to use the ADC3 and Interrupt to convert continuously 
data from ADC3 channel8.

The ADC3 is configured to convert continuously channel7(for STM322xG-EVAL).

Each time an end of conversion occurs an interrupt is generated and the converted 
data of ADC3 DR register is affected to the uhADCxConvertedValue variable in the 
ADC conversion complete call back function.

The user can use the debugger's watch to evaluate uhADCxConvertedValue.

In this example, the system clock is 120MHz, APB2 = 60MHz and ADC clock = APB2/2. 
Since ADC3 clock is 30 MHz and sampling time is set to 3 cycles, the conversion 
time to 12bit data is 12 cycles so the total conversion time is (12+3)/30= 0.5us(2Msps).

User can vary the ADC3 channel7(for STM322xG-EVAL) voltage using the Eval Board potentiometer

STM32 Eval board's LEDs can be used to monitor the transfer status:
  - LED3 is ON when there are an error in initialization.

@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
      based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
      a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
      than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
      To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
      
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
      to have correct HAL operation.


@par Directory contents 

  - ADC/ADC_RegularConversion_Interrupt/Inc/stm32f2xx_hal_conf.h    HAL configuration file
  - ADC/ADC_RegularConversion_Interrupt/Inc/stm32f2xx_it.h          Interrupt handlers header file
  - ADC/ADC_RegularConversion_Interrupt/Inc/main.h                  Main program header file  
  - ADC/ADC_RegularConversion_Interrupt/Src/stm32f2xx_it.c          Interrupt handlers
  - ADC/ADC_RegularConversion_Interrupt/Src/main.c                  Main program
  - ADC/ADC_RegularConversion_Interrupt/Src/stm32f2xx_hal_msp.c     HAL MSP module
  - ADC/ADC_RegularConversion_Interrupt/Src/system_stm32f2xx.c      STM32F2xx system clock configuration file


@par Hardware and Software environment 

  - This example runs on STM32F207xx/217xx device.
    
  - This example has been tested with STM322xG-EVAL evaluation board and can be
    easily tailored to any other supported device and development board.
  
  - STM322xG-EVAL Set-up
    - Use the Potentiometer (RV1) of the Eval board (connected to PF.09).


@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>
 */
