91 lines
3.6 KiB
Plaintext
91 lines
3.6 KiB
Plaintext
/**
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@page PWR_SLEEP Power sleep Mode Example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file PWR/PWR_SLEEP/readme.txt
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* @author MCD Application Team
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* @brief Description of the Power Sleep Mode 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 enter the Sleep mode and wake up from this mode by using an interrupt.
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In the associated software, the system clock is set to 24 MHz, the SysTick is
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programmed to generate an interrupt each 1 ms.
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In the associated software
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- the system clock is set to 24 MHz.
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- EXTI_Line0 is configured to generate an interrupt on falling edge.
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- the SysTick is programmed to generate an interrupt each 1 ms.
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The system enters SLEEP mode after 5 seconds and will wait for the User push-button is pressed
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to wake up from SLEEP mode. Current consumption could be monitored through an amperemeter.
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This behavior is repeated in an infinite loop.
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- SLEEP Mode
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=======================
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- System Running at 24 MHz
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- Code running from Internal FLASH
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- All peripherals OFF
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- Wakeup using EXTI Line (User push-button PA.00)
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@note This example can not be used in DEBUG mode, this is due to the fact
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that the Cortex-M3 core is no longer clocked during low power mode
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so debugging features are disabled
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application need to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Directory contents
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- PWR/PWR_SLEEP/Inc/stm32f1xx_conf.h HAL Configuration file
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- PWR/PWR_SLEEP/Inc/stm32f1xx_it.h Header for stm32f1xx_it.c
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- PWR/PWR_SLEEP/Inc/main.h Header file for main.c
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- PWR/PWR_SLEEP/Src/system_stm32f1xx.c STM32F1xx system clock configuration file
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- PWR/PWR_SLEEP/Src/stm32f1xx_it.c Interrupt handlers
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- PWR/PWR_SLEEP/Src/main.c Main program
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@par Hardware and Software environment
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- This example runs on STM32F1xx devices
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- This example has been tested with STMicroelectronics STM32VL-Discovery
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evaluation board and can be easily tailored to any other supported device
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and development board.
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- STM32VL-Discovery Set-up
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- Use the User push-button connected to pin PA.00 (EXTI_Line0)
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- Connect an amperemeter to JP1 to measure the IDD current
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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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