2019-05-01 00:27:23 +08:00
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/**
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@page PWR_CurrentConsumption PWR Current Consumption example
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file PWR/PWR_CurrentConsumption/readme.txt
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* @author MCD Application Team
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* @brief Description of the PWR Current Consumption example.
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******************************************************************************
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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This example shows how to configure the STM32F4xx system to measure different
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Low-power modes current consumption.
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The Low Power modes are:
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- Sleep Mode
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- STOP mode with RTC
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- Under-Drive STOP mode with RTC
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- STANDBY mode without RTC and BKPSRAM
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- STANDBY mode with RTC
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- STANDBY mode with RTC and BKPSRAM.
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To run this example, user has to follow the following steps:
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1. Select the Low power modes to be measured by uncommenting the corresponding
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line inside the stm32f4xx_lp_modes.h file.
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@code
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/* #define SLEEP_MODE */
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/* #define STOP_MODE */
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/* #define STOP_UNDERDRIVE_MODE */
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/* #define STANDBY_MODE */
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/* #define STANDBY_RTC_MODE */
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/* #define STANDBY_RTC_BKPSRAM_MODE */
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@endcode
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2. Use an external amperemeter to measure the IDD current.
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3. This example can not be used in DEBUG mode,this is due to the fact that the
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Cortex-M4 core is no longer clocked during low power mode so debugging
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features are disabled
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@note LSE oscillator clock is used as RTC clock source by default. LSE oscillator
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clock usually delivered by a 32.768 kHz quartz.
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The user can use also LSI as RTC clock source. The user uncomment the adequate
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line on the main.h file.
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@code
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#define RTC_CLOCK_SOURCE_LSE
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/* #define RTC_CLOCK_SOURCE_LSI */
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@endcode
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Here below a detailed description of the example code:
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@verbatim
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1. After reset, the program waits for Key button connected to the PC.13 to be
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pressed to enter the selected low power mode.
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- When the RTC is not used in the low power mode configuration, press
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again the Key button or the wake up button to exit the low power mode.
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- When the RTC is used, the wake-up from low power mode is automatically
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generated by the RTC (after 20s).
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2. Low power modes description:
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- Sleep Mode
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============
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- System Running at PLL (180MHz)
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- Flash 5 wait state
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- Instruction and Data caches ON
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- Prefetch OFF
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- Code running from Internal FLASH
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- All peripherals disabled.
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- Wake-up using EXTI Line (Key Button PC.13)
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- STOP Mode
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===========
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- RTC Clocked by LSE or LSI
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- Regulator in LP mode
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- HSI, HSE OFF and LSI if not used as RTC Clock source
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- No IWDG
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- FLASH in deep power down mode
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- Automatic Wake-up using RTC clocked by LSE/LSI (after ~20s)
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- Under Drive STOP Mode
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=======================
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- RTC Clocked by LSI
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- Regulator in LP mode
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- Under drive feature enabled
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- HSI, HSE OFF and LSI if not used as RTC Clock source
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- No IWDG
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- FLASH in deep power down mode
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- Automatic Wakeup using RTC clocked by LSI (after ~20s)
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- STANDBY Mode
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==============
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- Backup SRAM and RTC OFF
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- IWDG and LSI OFF
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- Wake-up using WakeUp Pin (PA.00)
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- STANDBY Mode with RTC clocked by LSE/LSI
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==========================================
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- RTC Clocked by LSE or LSI
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- IWDG OFF and LSI OFF if not used as RTC Clock source
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- Backup SRAM OFF
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- Automatic Wake-up using RTC clocked by LSE/LSI (after ~20s)
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- STANDBY Mode with RTC clocked by LSE/LSI and BKPSRAM
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======================================================
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- RTC Clocked by LSE or LSI
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- Backup SRAM ON
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- IWDG OFF
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- Automatic Wake-up using RTC clocked by LSE/LSI (after ~20s)
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3. After exit from Low power mode the LED4 connected to PG.12 is turned On
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4. The sequence will be repeated from step 1
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@endverbatim
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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 needs 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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@note Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select the RTC clock source; in this
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case the Backup domain will be reset in order to modify the RTC Clock source, as consequence RTC
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registers (including the backup registers) and RCC_BDCR register are set to their reset values.
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@note On the STM324x9I-EVAL board, an extra current consumption(~0.5mA) is added due to the Ethernet
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and USB PHYs. So, to reach the correct current consumption values, this example configures the Ethernet
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and USB PHYs in Low power mode.
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2020-02-27 19:23:58 +08:00
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@par Keywords
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Power, STOP, Sleep, Standby, Current Consumption, Low Power, LSI, Backup SRAM, Voltage range
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2019-05-01 00:27:23 +08:00
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@par Directory contents
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- PWR/PWR_CurrentConsumption/Inc/stm32f4xx_hal_conf.h HAL configuration file
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- PWR/PWR_CurrentConsumption/Inc/stm32f4xx_it.h Interrupt handlers header file
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- PWR/PWR_CurrentConsumption/Inc/main.h Main program header file
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- PWR/PWR_CurrentConsumption/Inc/stm32f4xx_lp_modes.h STM32F4xx Low Power Modes header file
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- PWR/PWR_CurrentConsumption/Src/stm32f4xx_it.c Interrupt handlers
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- PWR/PWR_CurrentConsumption/Src/main.c Main program
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- PWR/PWR_CurrentConsumption/Src/stm32f4xx_hal_msp.c HAL MSP module
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- PWR/PWR_CurrentConsumption/Src/stm32f4xx_lp_modes.c STM32F4xx Low Power Modes source file
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@par Hardware and Software environment
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- This example runs on STM32F429xx/STM32F439xx devices.
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- This example has been tested with STMicroelectronics STM324x9I-EVAL RevB
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evaluation boards and can be easily tailored to any other supported device
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and development board.
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- STM324x9I-EVAL Set-up
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- Use LED3 and LED4 connected respectively to PG.10 and PG.12 pins.
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- Use Key Button connected to PC.13 pin.
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- Use Wake up Button connected to PA.00 pin.
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- Connect an amperemeter to jumper JP2 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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