STM32CubeF7/Projects/STM32F767ZI-Nucleo/Examples_LL/ADC/ADC_ContinuousConversion_TriggerSW/readme.txt

/**
  @page ADC_ContinuousConversion_TriggerSW ADC example
  
  @verbatim
  ******************************************************************************
  * @file    Examples_LL/ADC/ADC_ContinuousConversion_TriggerSW/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the ADC_ContinuousConversion_TriggerSW example.
  ******************************************************************************
  *
  * Copyright (c) 2016 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

How to use an ADC peripheral to perform continuous ADC conversions on a 
channel, from a software start.

This example is based on the STM32F7xx 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 push 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:
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 push button
  1 GPIO for LED1
  1 GPIO for analog input: PA.04 (Right connector CN7 pin 17)


@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><><EFBFBD><EFBFBD><EFBFBD>then it is highly recommended to enable the CPU cache and maintain its coherence at application level.
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>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
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> It is also possible to configure the MPU as "Write through", to guarantee the write access coherence.
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>In that case, the MPU must be configured as Cacheable/Bufferable/Not Shareable.
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Even though the user must manage the cache coherence for read accesses.
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Please refer to the AN4838 <20>Managing memory protection unit (MPU) in STM32 MCUs<55>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Please refer to the AN4839 <20>Level 1 cache on STM32F7 Series<65>

@par Directory contents 

  - ADC/ADC_ContinuousConversion_TriggerSW/Inc/stm32f7xx_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/stm32f7xx_it.c          Interrupt handlers
  - ADC/ADC_ContinuousConversion_TriggerSW/Src/main.c                  Main program
  - ADC/ADC_ContinuousConversion_TriggerSW/Src/system_stm32f7xx.c      STM32F7xx system source file


@par Hardware and Software environment

  - This example runs on STM32F767xx devices.
    
  - This example has been tested with NUCLEO-F767ZI 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>
 */