/**
@page PWR_OptimizedRunMode PWR PWR_OptimizedRunMode
@verbatim
******************************************************************************
* @file Examples_LL/PWR/PWR_OptimizedRunMode/readme.txt
* @author MCD Application Team
* @brief Description of the PWR Optimized Run Mode example.
******************************************************************************
*
* Copyright (c) 2020 STMicroelectronics. All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
@endverbatim
@par Example Description
How to increase/decrease frequency and VCORE and how to enter/exit the
Low-power run mode.
In the associated software, the system clock is set to 48MHz, an EXTI line
is connected to the User push-button (B1) through PA.00 and configured to generate an
interrupt on falling edge upon key press.
After start-up LED2 is toggling FAST (100ms blinking period), indicates that device
is running at 48MHz.
LED2 toggling speed is controlled by variable "uhLedBlinkSpeed".
The User push-button (B1) can be pressed at any time to change Frequency, VCore(VOS)
and Low Power Run mode.
Initial STATE:
--> Freq: 48MHz, VCore 1.2V, Core in Run Mode
--> LED2 toggling FAST (100ms) - wait User push-button (B1) action
STATE 2:
User push-button (B1) pressed:
--> Freq: 16MHz, VCore 1.0V, Core in Run Mode
--> LED2 toggling MEDIUM (200ms) - wait User push-button (B1) action
STATE 3:
User push-button (B1) pressed:
--> Freq: 100KHz, VCore 1.0V, Core in Low Power Run Mode
--> LED2 toggling SLOW (400ms) - wait User push-button (B1) action
STATE 4:
User push-button (B1) pressed:
--> Freq: 16MHz, VCore 1.0V, Core in Run Mode
--> LED2 toggling MEDIUM (200ms) - wait User push-button (B1) action
Final STATE:
User push-button (B1) pressed:
--> Freq: 48MHz, VCore 1.2V, Core in Run Mode
--> LED2 toggling FAST (100ms) in infinite loop
@note To measure MCU current consumption on board STM32WL Nucleo,
board configuration must be applied:
- remove all jumpers on connector JP8 to avoid leakages between ST-Link circuitry and STM32WL device.
- remove jumper JP1 and connect an amperemeter to measure current between the 2 connectors of the jumper.
NB: LED2 has an impact on power consumption.
Remove LED2 blinking to have a constant power consumption,
comment line "#define USE_LED" in main.c file
@note This example may not be used in debug mode depending on IDE and debugger
configuration selected, due to stsem low frequency and low power mode
constraints.
@par Keywords
Power, PWR, Low-power run mode, Interrupt, VCORE, Low Power
@par Directory contents
- PWR/PWR_OptimizedRunMode/Inc/stm32wlxx_it.h Interrupt handlers header file
- PWR/PWR_OptimizedRunMode/Inc/main.h Header for main.c module
- PWR/PWR_OptimizedRunMode/Inc/stm32_assert.h Template file to include assert_failed function
- PWR/PWR_OptimizedRunMode/Src/stm32wlxx_it.c Interrupt handlers
- PWR/PWR_OptimizedRunMode/Src/main.c Main program
- PWR/PWR_OptimizedRunMode/Src/system_stm32wlxx.c STM32WLxx system source file
@par Hardware and Software environment
- This example runs on STM32WL55JCIx devices.
- This example has been tested with STMicroelectronics NUCLEO-WL55JC RevC
board and can be easily tailored to any other supported device
and development board.
- NUCLEO-WL55JC RevC Set-up
- LED2 connected to pin PB.09
- User push-button connected to pin PA.00
@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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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