STM32CubeF4

@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file ADC/ADC_InjectedConversion_Interrupt/readme.txt
* @author MCD Application Team
* @brief Description of the ADC RegularConversion interrupt 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

How to interrupt continuous ADC regular channel conversion using ADC injected
channels, and how to get the result of this conversion.

This example describes how to interrupt continuous ADC1 regular ADC_CHANNEL_4 conversion
using ADC1 injected ADC_CHANNEL_12 and how to get the converted value of this conversion.

The ADC1 is configured to convert continuously regular ADC_CHANNEL_4
and convert injected ADC_CHANNEL_12 (connected to PC.02) when injected conversion starts
(after one second of the start of regular channel).

Each time a regular channel end of conversion occurs an interrupt is generated
and the converted data of ADC1 DR register is affected to the uhADCxConvertedRegValue
variable in the ADC conversion complete callback function. After one second of
the start of regular ADC_CHANNEL_4 conversion the injected ADC_CHANNEL_12 conversion starts
so regular conversion is temporary interrupted until the end of injected conversion.
When the injected conversion is finished, an interrupt is generated, and the
converted injected data of ADC1 DR register is affected to the uhADCxConvertedInjValue
variable in the ADC conversion complete callback function.

Conversion time (reference manual, Reset and Clock control part):
The function SystemClock_Config() configures the clock divider as follows:
1) The system clock is 180 MHz.
2) AHB Prescaler = 1 => AHB clock is 180 MHz.
2) APB2 Prescaler = 2 => APB2 clock is 90 MHz.
3) ADC Prescaler = 4 => ADC clock is 22.5 MHz.

Sampling time is set to ADC_SAMPLETIME_56CYCLES (56 cycles).
ConvTime = Sampling time + 12 cycles ADC conversion time + 3 cycles sampling time.
= 71 clock cycles
= 3.16 us

User can vary the ADC_CHANNEL_4 voltage using the Eval Board potentiometer (P2) connected to PA.04.
SB94 must be closed to use the potentiometer.

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

@par Directory contents

- ADC/ADC_InjectedConversion_Interrupt/Inc/stm32f4xx_hal_conf.h HAL configuration file
- ADC/ADC_InjectedConversion_Interrupt/Inc/stm32f4xx_it.h DMA interrupt handlers header file
- ADC/ADC_InjectedConversion_Interrupt/Inc/main.h Header for main.c module
- ADC/ADC_InjectedConversion_Interrupt/Src/stm32f4xx_it.c DMA interrupt handlers
- ADC/ADC_InjectedConversion_Interrupt/Src/main.c Main program
- ADC/ADC_InjectedConversion_Interrupt/Src/stm32f4xx_hal_msp.c HAL MSP file
- ADC/ADC_InjectedConversion_Interrupt/Src/system_stm32f4xx.c STM32F4xx system source file

@par Hardware and Software environment

- This example runs on STM32F446xx devices.

- This example has been tested with STM32446E-EVAL board revB and can be
easily tailored to any other supported device and development board.

- STM32446E-EVAL Set-up
- Use the Potentiometer (P2) of the Eval board (connected to PA.04).
- Connect PC.02 to a power supply (do not forget to connect the power supply
GND to the EVAL board GND)

@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