69 lines
2.6 KiB
Plaintext
69 lines
2.6 KiB
Plaintext
/**
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@page RCC_OutputSystemClockOnMCO RCC example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file Examples_LL/RCC/RCC_OutputSystemClockOnMCO/readme.txt
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* @author MCD Application Team
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* @brief Description of the RCC 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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This example describes how to configure MCO pin (PA8) to output the system clock.
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At start-up, USER button and MCO pin are configured. The program configures SYSCLK
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to the max frequency using the PLL with HSE as clock source.
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The signal on PA8 (or pin 23 of CN10 connector) can be monitored with an oscilloscope
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to check the different MCO configuration set at each button press.
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Different configuration will be observed
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- SYSCLK frequency with frequency value around @72MHz.
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- PLLCLK frequency value divided by 2, hence around @36MHz.
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- HSE frequency with frequency value around @8MHz.
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When user press User push-button, a LED2 toggle is done to indicate a change in MCO config.
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@par Directory contents
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- RCC/RCC_OutputSystemClockOnMCO/Inc/stm32f1xx_it.h Interrupt handlers header file
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- RCC/RCC_OutputSystemClockOnMCO/Inc/main.h Header for main.c module
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- RCC/RCC_OutputSystemClockOnMCO/Inc/stm32_assert.h Template file to include assert_failed function
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- RCC/RCC_OutputSystemClockOnMCO/Src/stm32f1xx_it.c Interrupt handlers
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- RCC/RCC_OutputSystemClockOnMCO/Src/main.c Main program
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- RCC/RCC_OutputSystemClockOnMCO/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 board and can be
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easily tailored to any other supported device and development board.
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- STM32F103RB-Nucleo Set-up
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- Connect the MCO pin to an oscilloscope to monitor the different waveforms:
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- PA.08: connected to pin 23 of CN10 connector for Nucleo-64 (MB1136)
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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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