/**
  @page RCC_ClockConfig RCC Clock configuration example
  
  @verbatim
  ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
  * @file    RCC/RCC_ClockConfig/readme.txt 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Description of the RCC Clock configuration example.
  ******************************************************************************
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  ******************************************************************************
   @endverbatim

@par Example Description 

This example shows how to configure the System clock(SYSCLK) to have different
frequencies: 24MHz, 36MHz, 48MHz, 56MHz and 72MHz (common frequencies that covers
the major of the applications). 
The SYSCLK frequency is selected by user in main.h file.

It shows how to use, for debug purpose, the RCC_GetClocksFreq function to retrieve
the current status and frequencies of different on chip clocks. You can see the
RCC_ClockFreq structure content, which hold the frequencies of different on chip
clocks, using your toolchain debugger.

This example handles also the High Speed External clock (HSE) failure detection:
when the HSE clock disappears (broken or disconnected external Quartz); HSE, PLL
are disabled (but no change on PLL config), HSI selected as system clock source
and an interrupt (NMI) is generated. In the NMI ISR, the HSE, HSE ready interrupt
are enabled and once HSE clock recover, the HSERDY interrupt is generated and in
the RCC ISR routine the system clock is reconfigured to its previous state (before
HSE clock failure). You can monitor the HSE clock on the MCO pin (PA.08).

Four LEDs are toggled with a timing defined by the Delay function.

@note To adjust the External High Speed oscillator (HSE) Startup Timeout value,
use HSEStartUp_TimeOut variable defined in the stm32f10x.h file.


@par Directory contents 

  - RCC/RCC_ClockConfig/stm32f10x_conf.h     Library Configuration file
  - RCC/RCC_ClockConfig/stm32f10x_it.c       Interrupt handlers
  - RCC/RCC_ClockConfig/stm32f10x_it.h       Header for stm32f10x_it.c
  - RCC/RCC_ClockConfig/main.h               Main header file
  - RCC/RCC_ClockConfig/main.c               Main program
  - RCC/RCC_ClockConfig/system_stm32f10x.c   STM32F10x system source file

@par Hardware and Software environment 

  - This example runs on STM32F10x Connectivity line, High-Density, High-Density 
    Value line, Medium-Density, XL-Density, Medium-Density Value line, Low-Density
    and Low-Density Value line Devices.
  
  - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density 
    Value line),STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line), 
    STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density) 
    evaluation boards and can be easily tailored to any other supported device 
    and development board.
    To select the STMicroelectronics evaluation board used to run the example, 
    uncomment the corresponding line in stm32_eval.h file (under Utilities\STM32_EVAL)

  - STM32100E-EVAL Set-up 
    - Use LED1, LED2, LED3 and LED4 connected respectively to PF.06, PF0.7, PF.08
      and PF.09 pins
      
  - STM32100B-EVAL Set-up  
    - Use LED1, LED2, LED3 and LED4 connected respectively to PC.06, PC.07, PC.08
      and PC.09 pins
      
  - STM3210C-EVAL Set-up 
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.07, PD.13, PF.03
      and PD.04 pins
    
  - STM3210E-EVAL Set-up 
    - Use LED1, LED2, LED3 and LED4 connected respectively to PF.06, PF0.7, PF.08
      and PF.09 pins

  - STM3210B-EVAL Set-up  
    - Use LED1, LED2, LED3 and LED4 connected respectively to PC.06, PC.07, PC.08
      and PC.09 pins

  - STM32100E-EVAL Set-up 
    - Use LED1, LED2, LED3 and LED4 connected respectively to PF.06, PF0.7, PF.08
      and PF.09 pins
	  
@par How to use it ? 

In order to make the program work, you must do the following :
 - Copy all source files from this example folder to the template folder under
   Project\STM32F10x_StdPeriph_Template
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - Run the example 
   
@note
 - Low-density Value line devices are STM32F100xx microcontrollers where the 
   Flash memory density ranges between 16 and 32 Kbytes.
 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
   microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
 - Medium-density Value line devices are STM32F100xx microcontrollers where
   the Flash memory density ranges between 64 and 128 Kbytes.  
 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
   microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
 - High-density Value line devices are STM32F100xx microcontrollers where
   the Flash memory density ranges between 256 and 512 Kbytes.
 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
   the Flash memory density ranges between 256 and 512 Kbytes.
 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
   the Flash memory density ranges between 512 and 1024 Kbytes.
 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
   
 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
 */