/**
@page ADC_Oversampling ADC example
@verbatim
******************************************************************************
* @file Examples/ADC/ADC_Oversampling/readme.txt
* @author MCD Application Team
* @brief Description of the ADC_Oversampling example.
******************************************************************************
*
* Copyright (c) 2020 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
Use ADC to convert a single channel but using oversampling feature to increase resolution.
Example configuration:
ADC is configured to convert a single channel, in single conversion mode,
from SW trigger.
Oversampling is configured to perform 16 conversions
with a right shift of 4 before returning a result.
Example execution:
The ADC performs conversions of the selected channel in continuous mode from SW start
trigger.
Then, SW is waiting for conversion to complete. When done, it reads conversion data from
ADC data register, stores it into a variable, and convert it into mVolt in another one?
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, if ADC channel and DAC channel are selected on the same GPIO.
Otherwise, connect a wire between DAC channel output and ADC input.
Other peripherals used:
1 GPIO for LED
1 GPIO for analog input: PA10 (Arduino connector CN8 pin 3, Morpho connector CN7 pin 32)
DAC
1 GPIO for DAC channel output PA10 (Arduino connector CN8 pin 3, Morpho connector CN7 pin 32)
1 GPIO for push button
Board settings:
- ADC is configured to convert ADC_CHANNEL_6 (Arduino connector CN8 pin 3, Morpho connector CN7 pin 32).
- The voltage input on ADC channel is provided from DAC (DAC_CHANNEL_1).
ADC input from pin PA10 and DAC output to pin PA10:
If same pin is used no connection is required, it is done internally. Otherwise, user need to connect a wire between Arduino connector CN8 pin 3, Morpho connector CN7 pin 32 and Arduino connector CN8 pin 3, Morpho connector CN7 pin 32
- Voltage is increasing at each click on User push-button (B1), from 0 to maximum range in 4 steps.
Clicks on User push-button (B1) follow circular cycles: At clicks counter maximum value reached, counter is set back to 0.
To observe voltage level applied on ADC channel through GPIO, connect a voltmeter on
pin PA10 (Arduino connector CN8 pin 3, Morpho connector CN7 pin 32).
NUCLEO-WL55JC RevC board LED is be used to monitor the program execution status:
- Normal operation: LED2 is toggling at each conversion.
- Error: In case of error, LED2 is toggling twice at a frequency of 1Hz.
@par Keywords
ADC, analog digital converter, analog, conversion, voltage, channel, analog input, oversampling
@par Directory contents
- ADC/ADC_Oversampling/Inc/stm32wlxx_nucleo_conf.h BSP configuration file
- ADC/ADC_Oversampling/Inc/stm32wlxx_hal_conf.h HAL configuration file
- ADC/ADC_Oversampling/Inc/stm32wlxx_it.h Interrupt handlers header file
- ADC/ADC_Oversampling/Inc/main.h Header for main.c module
- ADC/ADC_Oversampling/Src/stm32wlxx_it.c Interrupt handlers
- ADC/ADC_Oversampling/Src/main.c Main program
- ADC/ADC_Oversampling/Src/stm32wlxx_hal_msp.c HAL MSP module
- ADC/ADC_Oversampling/Src/system_stm32wlxx.c STM32WLxx system source file
@par Hardware and Software environment
- This example runs on STM32WLxx devices.
- This example has been tested with NUCLEO-WL55JC RevC 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>© COPYRIGHT STMicroelectronics</center></h3>
*/
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