85 lines
3.6 KiB
Plaintext
85 lines
3.6 KiB
Plaintext
/**
|
|
@page ADC_RegularConversion_Interrupt conversion using interrupt
|
|
|
|
@verbatim
|
|
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
|
|
* @file ADC/ADC_RegularConversion_Interrupt/readme.txt
|
|
* @author MCD Application Team
|
|
* @brief Description of the ADC RegularConversion interrupt 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
|
|
|
|
How to use the ADC in interrupt mode to convert data through the HAL API.
|
|
|
|
The ADC1 is configured to continuously convert ADC_CHANNEL_10.
|
|
|
|
Each time an end of conversion occurs an interrupt is generated and the converted
|
|
data of ADC1 DR register is affected to the uhADCxConvertedValue variable in the
|
|
ADC conversion complete call back function.
|
|
|
|
|
|
In this example, the system clock is 100MHz, APB2 = 100MHz and ADC clock = APB2/4.
|
|
Since ADC1 clock is 25 MHz and sampling time is set to 3 cycles, the conversion
|
|
time to 12bit data is 12 cycles so the total conversion time is (12+3)/25= 0.6us(1.7Msps).
|
|
|
|
|
|
User can vary the ADC_CHANNEL_10 voltage by applying an input voltage on pin PC.00 (pin3 connector 9)
|
|
(e.g. using function generator).
|
|
|
|
The converted value can be monitored through the debugger using the uhADCxConvertedValue variable.
|
|
|
|
STM32 board LED can be used to monitor the conversion:
|
|
- LED3 is ON if an error occurs.
|
|
|
|
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
|
|
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
|
|
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
|
|
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
|
|
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
|
|
|
|
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
|
|
to have correct HAL operation.
|
|
|
|
@par Keywords
|
|
|
|
Analog, ADC, Analog to Digital Converter, Regular Conversion, Interrupt, Continuous Conversion
|
|
|
|
@par Directory contents
|
|
|
|
- ADC/ADC_RegularConversion_Interrupt/Inc/stm32f4xx_hal_conf.h HAL configuration file
|
|
- ADC/ADC_RegularConversion_Interrupt/Inc/stm32f4xx_it.h DMA interrupt handlers header file
|
|
- ADC/ADC_RegularConversion_Interrupt/Inc/main.h Header for main.c module
|
|
- ADC/ADC_RegularConversion_Interrupt/Src/stm32f4xx_it.c DMA interrupt handlers
|
|
- ADC/ADC_RegularConversion_Interrupt/Src/main.c Main program
|
|
- ADC/ADC_RegularConversion_Interrupt/Src/stm32f4xx_hal_msp.c HAL MSP file
|
|
- ADC/ADC_RegularConversion_Interrupt/Src/system_stm32f4xx.c STM32F4xx system source file
|
|
|
|
@par Hardware and Software environment
|
|
|
|
- This example runs on STM32F413xx/STM32F423xx devices.
|
|
|
|
- This example has been tested with STM32F413ZH-Nucleo 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
|
|
|
|
|
|
*/
|