67 lines
2.6 KiB
Plaintext
67 lines
2.6 KiB
Plaintext
/**
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@page RCC_UseHSEasSystemClock RCC Clock Config example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file Examples_LL/RCC/RCC_UseHSEasSystemClock/readme.txt
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* @author MCD Application Team
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* @brief Description of the RCC HSE start 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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Use of the RCC LL API to start the HSE and use it as system clock.
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At start-up, HSI clock is used as system clock (default clock after reset) and then Systick is
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configured at 1 ms using HSI_VALUE define.
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Then, HSE is started and we wait for ready state. System clock is set to HSE thanks to IT
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triggered by HSE ready.
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- LED2 is turned ON to indicate that HSE is ready.
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- LED2 is toggled with a timing of 1 second in case of error to switch SYSCLK to HSE or if HSE CSS
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failure is detected (through NMI IT).
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@note In HSE bypass mode, input clock will come from the MCO from
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ST_LINK MCU. This frequency cannot be changed, and it is fixed
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at 8 MHz. To use MCO from ST_LINK you need to check the Board
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User Manual to know how to connect the MCO pin to the STM32 device.
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@par Directory contents
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- RCC/RCC_UseHSEasSystemClock/Inc/stm32f1xx_it.h Interrupt handlers header file
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- RCC/RCC_UseHSEasSystemClock/Inc/main.h Header for main.c module
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- RCC/RCC_UseHSEasSystemClock/Inc/stm32_assert.h Template file to include assert_failed function
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- RCC/RCC_UseHSEasSystemClock/Src/stm32f1xx_it.c Interrupt handlers
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- RCC/RCC_UseHSEasSystemClock/Src/main.c Main program
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- RCC/RCC_UseHSEasSystemClock/Src/system_stm32f1xx.c STM32F1xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F103xB devices.
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- This example has been tested with STM32F103RB-Nucleo
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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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