/**
@page ADC_InjectedConversion_Interrupt conversion using interrupt
@verbatim
******************************************************************************
* @file ADC/ADC_InjectedConversion_Interrupt/readme.txt
* @author MCD Application Team
* @brief Description of the ADC RegularConversion interrupt example.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@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.
The ADC3 is configured to convert continuously regular ADC_CHANNEL_8
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 ADC3 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_8 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 ADC3 DR register is affected to the uhADCxConvertedInjValue
variable in the ADC conversion complete callback function.
In this example, the system clock is 216MHz, APB2 = 108MHz and ADC clock = APB2/4.
Since ADC3 clock is 27 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)/27= 0.6us(1.8Msps).
User can vary the ADC_CHANNEL_8 voltage using the Eval Board potentiometer (RV1) connected to PF.10.
The converted values could be monitered through debugger:
- uhADCxConvertedRegValue for regular conversion
- uhADCxConvertedInjValue for injected conversion
STM32 Eval board's LEDs can be used to monitor the transfer status:
- LED3 is ON when there is an initialization error
@par Keywords
Analog, ADC, Analog to Digital, Injected mode, Continuous conversion, Interrupt, Measurement,
@Note<74>If the user code size exceeds the DTCM-RAM size or starts from internal cacheable memories (SRAM1 and SRAM2),that is shared between several processors,
<20><><A0><A0><A0>then it is highly recommended to enable the CPU cache and maintain its coherence at application level.
<0A><><A0><A0><A0><A0>The address and the size of cacheable buffers (shared between CPU and other masters) must be properly updated to be aligned to cache line size (32 bytes).
@Note It is recommended to enable the cache and maintain its coherence, but depending on the use case
<0A><><A0><A0><A0> It is also possible to configure the MPU as "Write through", to guarantee the write access coherence.
<0A><><A0><A0><A0><A0>In that case, the MPU must be configured as Cacheable/Bufferable/Not Shareable.
<0A><><A0><A0><A0><A0>Even though the user must manage the cache coherence for read accesses.
<0A><><A0><A0><A0><A0>Please refer to the AN4838 <20>Managing memory protection unit (MPU) in STM32 MCUs<55>
<0A><><A0><A0><A0><A0>Please refer to the AN4839 <20>Level 1 cache on STM32F7 Series<65>
@par Directory contents
- ADC/ADC_InjectedConversion_Interrupt/Inc/stm32f7xx_hal_conf.h HAL configuration file
- ADC/ADC_InjectedConversion_Interrupt/Inc/stm32f7xx_it.h DMA interrupt handlers header file
- ADC/ADC_InjectedConversion_Interrupt/Inc/main.h Header for main.c module
- ADC/ADC_InjectedConversion_Interrupt/Src/stm32f7xx_it.c DMA interrupt handlers
- ADC/ADC_InjectedConversion_Interrupt/Src/main.c Main program
- ADC/ADC_InjectedConversion_Interrupt/Src/stm32f7xx_hal_msp.c HAL MSP file
- ADC/ADC_InjectedConversion_Interrupt/Src/system_stm32f7xx.c STM32F7xx system source file
@par Hardware and Software environment
- This example runs on STM32F767xx/STM32F769xx/STM32F777xx/STM32F779xx devices.
- This example has been tested and validated with STM32F769I-EVAL board and can be
easily tailored to any other supported device and development board.
- STM32F769I-EVAL Set-up
- Use the Potentiometer (RV1) of the Eval board (connected to PF.10).
- 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
*/
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