/**
@page ADC_AnalogWatchdog ADC example
@verbatim
******************************************************************************
* @file Examples_LL/ADC/ADC_AnalogWatchdog/readme.txt
* @author MCD Application Team
* @brief Description of the ADC_AnalogWatchdog 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 use an ADC peripheral with an ADC analog watchdog to monitor a channel
and detect when the corresponding conversion data is outside the window
thresholds.
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.
Analog watchdog is configured to monitor all channels on group regular
(therefore, including the selected channel),
low threshold is set to 0V and high threshold is set to Vdda/2.
ADC interruption enabled: Analog watchdog 1.
Example execution:
From the main program execution, the ADC converts the selected channel continuously.
When conversion data is out of analog watchdog window, ADC interruption occurs.
Into analog watchdog callback function, a status variable is set
and a LED1 is turned-on (LED1 turns ON into Analog Watchdog window).
At each press on push button, the ADC analog watchdog is rearmed to be ready
for another trig.
LED1 is blinking every 1 sec in case of error.
Note: In case of noise on voltage applied on ADC channel input, ADC analog watchdog
may trig at a voltage level with an uncertainty of tens of mV.
For debug: variables to monitor with debugger watch window:
- "ubAnalogWatchdog1Status": analog watchdog state
Connection needed: use an external power supply, adjust supply voltage and connect
it to analog input pin (cf pin below).
Other peripherals used:
1 GPIO for push button
1 GPIO for LED1
1 GPIO for analog input: PA.04 (Right connector CN7 pin 17)
@par Keywords
Analog, ADC, Analog to Digital, Dual mode, Continuous conversion mode, DMA, Analog watchdog
@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_AnalogWatchdog/Inc/stm32f7xx_it.h Interrupt handlers header file
- ADC/ADC_AnalogWatchdog/Inc/main.h Header for main.c module
- ADC/ADC_AnalogWatchdog/Inc/stm32_assert.h Template file to include assert_failed function
- ADC/ADC_AnalogWatchdog/Src/stm32f7xx_it.c Interrupt handlers
- ADC/ADC_AnalogWatchdog/Src/main.c Main program
- ADC/ADC_AnalogWatchdog/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
*/
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