/**
@page ADC_SingleConversion_TriggerSW_IT ADC example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file Examples_MIX/ADC/ADC_SingleConversion_TriggerSW_IT/readme.txt
* @author MCD Application Team
* @brief Description of the ADC_SingleConversion_TriggerSW_IT example.
******************************************************************************
* @attention
*
* Copyright (c) 2017 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
This example describes how to use the ADC to perform a single ADC channel
conversion, at each software start. This example uses the interrupt programming
model (for programming models in Polling or DMA mode, refer to other
examples). This example is based on the STM32F4xx ADC HAL and LL API
(LL API usage for performance improvement).
Example configuration:
ADC is configured to convert a single channel, in single conversion mode,
from SW trigger.
ADC interruption enabled: EOC (end of conversion of ADC group regular).
Example execution:
At each press on push button, the ADC performs 1 conversion of the selected channel.
When conversion is completed, ADC interruption occurs.
IRQ handler callback function reads conversion data from ADC data register
and stores it into a variable, LED1 is turned on.
Notes: 1- "uhADCxConvertedData": ADC group regular conversion data following:
uhADCxConvertedData = (Input voltage * ( 2^resolution -1)) / Vdda
resolution = 12bits / Vdda = 3,3 V
2- LED2 toggles in case of conversion error.
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.
See comment below related to literal "WAVEFORM_GENERATION".
Other peripherals used:
1 GPIO for push button
1 GPIO for LED
1 GPIO for analog input: PA.04 (Connector CN7 pin 17)
1 GPIO for DAC channel output PA.04 (Connector CN7 pin 17)
Compilation switches are available to customize configuration and execution of this example:
One compilation switch is available to generate a waveform voltage
for test (located in main.h):
- If literal "WAVEFORM_GENERATION" is defined: For this example purpose, generates a
waveform voltage on a spare DAC channel LL_DAC_CHANNEL_1 (pin PA.04)
so user has just to connect a wire between DAC channel output and ADC input to run this example.
If ADC channel and DAC channel are selected on the same GPIO, then no external wire is required.
Waveform generation: waveform circular, shape of ramp: Voltage is increasing at each press on push button,
from 0V to maximum range (Vdda) in 5 steps (with vdda=3.3V: 0V, 0.8V, 1.65V, 2.5V, 3.3V),
then starting back from 0V.
and follows circular cycles: At clicks counter maximum value reached, counter is set back to 0.
- If literal "WAVEFORM_GENERATION" is not defined: no voltage is generated, user has
to connect a voltage source to the selected ADC channel input to run this example.
@par Keywords
ADC, ADC channel, DAC channel, conversion, EOC, single channel, single conversion mode, interrupt,
@par Directory contents
- ADC/ADC_SingleConversion_TriggerSW_IT/Inc/stm32f4xx_it.h Interrupt handlers header file
- ADC/ADC_SingleConversion_TriggerSW_IT/Inc/main.h Header for main.c module
- ADC/ADC_SingleConversion_TriggerSW_IT/Src/stm32f4xx_it.c Interrupt handlers
- ADC/ADC_SingleConversion_TriggerSW_IT/Src/main.c Main program
- ADC/ADC_SingleConversion_TriggerSW_IT/Src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This example runs on STM32F429xx devices.
- This example has been tested with STM32F429ZI-Nucleo Rev B 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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