91 lines
3.5 KiB
Plaintext
91 lines
3.5 KiB
Plaintext
/**
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@page ADC_AnalogWatchdog ADC example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file Examples_LL/ADC/ADC_AnalogWatchdog/readme.txt
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* @author MCD Application Team
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* @brief Description of the ADC_AnalogWatchdog example.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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How to use an ADC peripheral with an ADC analog watchdog to monitor a channel
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and detect when the corresponding conversion data is outside the window
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thresholds.
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This example is based on the STM32F1xx ADC LL API.
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The peripheral initialization is done using LL unitary service functions
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for optimization purposes (performance and size).
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Example configuration:
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ADC is configured to convert a single channel, in continuous conversion mode,
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from SW trigger.
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Analog watchdog is configured to monitor all channels on group regular
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(therefore, including the selected channel),
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low threshold is set to 0V and high threshold is set to Vdda/2.
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ADC interruption enabled: Analog watchdog 1.
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Example execution:
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From the main program execution, the ADC converts the selected channel continuously.
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When conversion data is out of analog watchdog window, ADC interruption occurs.
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Into analog watchdog callback function, a status variable is set
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and a LED2 is turned-on (LED2 turns ON into Analog Watchdog window).
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At each press on User Button, the ADC analog watchdog is rearmed to be ready
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for another trig.
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LED2 is blinking every 1 sec in case of error.
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Note: In case of noise on voltage applied on ADC channel input, ADC analog watchdog
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may trig at a voltage level with an uncertainty of tens of mV.
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For debug: variables to monitor with debugger watch window:
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- "ubAnalogWatchdog1Status": analog watchdog state
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Connection needed: use an external power supply, adjust supply voltage and connect
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it to analog input pin (cf pin below).
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Other peripherals used:
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1 GPIO for User Button
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1 GPIO for LED2
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1 GPIO for analog input: PA.04 (Arduino connector CN8 pin A2, Morpho connector CN7 pin 32)
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@par Directory contents
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- ADC/ADC_AnalogWatchdog/Inc/stm32f1xx_it.h Interrupt handlers header file
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- ADC/ADC_AnalogWatchdog/Inc/main.h Header for main.c module
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- ADC/ADC_AnalogWatchdog/Inc/stm32_assert.h Template file to include assert_failed function
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- ADC/ADC_AnalogWatchdog/Src/stm32f1xx_it.c Interrupt handlers
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- ADC/ADC_AnalogWatchdog/Src/main.c Main program
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- ADC/ADC_AnalogWatchdog/Src/system_stm32f1xx.c STM32F1xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F103xB devices.
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- This example has been tested with STM32F103RB-Nucleo board and can be
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easily tailored to any other supported device and development board.
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
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*/
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