90 lines
3.5 KiB
Plaintext
90 lines
3.5 KiB
Plaintext
/**
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@page PWR_STANDBY PWR standby example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file PWR/PWR_STANDBY/readme.txt
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* @author MCD Application Team
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* @brief Description of the PWR STANDBY example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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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 Standby mode and wake up from this mode by using an external
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reset or the WKUP pin.
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This example shows also how to configure the stm32f1xx system to measure
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STANDBY mode current consumption.
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In the associated software
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- the system clock is set to 64 MHz.
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- PA.00 is configured to wake up the system after entering Standby mode.
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- the SysTick is programmed to generate an interrupt each 1 ms.
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The system enters STANDBY mode after 5s and will wait for injecting 3.3V on PA.00
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PWR_WAKEUP_PIN1. Current consumption could be monitored through an amperemeter connected to JP6.
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- STANDBY Mode
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===============
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- VREFINT OFF with fast wakeup enabled
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- No IWDG
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- Wakeup using PWR_WAKEUP_PIN1 (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
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delay (in milliseconds) based on variable incremented in SysTick ISR. This
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implies that if HAL_Delay() is called from a peripheral ISR process, then
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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_STANDBY/Inc/stm32f1xx_conf.h HAL Configuration file
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- PWR/PWR_STANDBY/Inc/stm32f1xx_it.h Header for stm32f1xx_it.c
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- PWR/PWR_STANDBY/Inc/main.h Header file for main.c
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- PWR/PWR_STANDBY/Src/system_stm32f1xx.c STM32F1xx system clock configuration file
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- PWR/PWR_STANDBY/Src/stm32f1xx_it.c Interrupt handlers
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- PWR/PWR_STANDBY/Src/main.c Main program
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@par Hardware and Software environment
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- STM32F103RB-Nucleo Set-up
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- Wake-up will be done in putting 3.3V to PA.00 pin (present on pin28 of CN7).
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Wired should be put between PA.00 and GND before running test. Connect to 3V3 to awake board.
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- Connect an amperemeter to JP6 to measure the IDD current
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- This example runs on STM32F1xx devices
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- This example has been tested with STMicroelectronics STM32F103RB-Nucleo
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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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@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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*/
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