/**
  @page PWR_STOP PWR STOP mdoe example
  
  @verbatim
  ******************** (C) COPYRIGHT 2012 STMicroelectronics *******************
  * @file    PWR/STOP/readme.txt 
  * @author  MCD Application Team
  * @version V1.1.1
  * @date    13-April-2012
  * @brief   Description of the PWR STOP mdoe example.
  ******************************************************************************
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
   @endverbatim

@par Example Description 

This example shows how to enters the system to STOP mode and wake-up from this
mode using RTC Wakeup Timer Event connected to EXTI Line 20.

In the associated software, the system clock is set to 32 MHz, the EXTI line 20,
connected internally to the RTC Wakeup event, is configured to generate an 
interrupt on rising edge each 4s and the SysTick is programmed to generate an 
interrupt each 250 ms. In the SysTick interrupt handler, the LED2 is
toggled, this is used to indicate whether the MCU is in STOP or RUN mode.

First, the "STM32L" string is displayed on the Glass LCD in scrolling mode. 
Then, the system enters STOP mode and will wait for the RTC Wakeup event to be 
generated each 4s. Once, the RTC WakeUp event is asserted, in the RTC_WKUP handler, 
the LED1 is toggled.

This behavior is repeated in an infinite loop.

LED2 are used to monitor the system state as following:
 - LED2 toggling: system in RUN mode

@note To measure the current consumption in STOP mode, please refer to 
      @subpage PWR_CurrentConsumption example.

@par Directory contents 

  - PWR/STOP/stm32l1xx_conf.h     Library Configuration file
  - PWR/STOP/stm32l1xx_it.c       Interrupt handlers
  - PWR/STOP/stm32l1xx_it.h       Header for stm32l1xx_it.c
  - PWR/STOP/main.c               Main program
  - PWR/STOP/system_stm32l1xx.c   STM32L1xx system source file
  
@note The "system_stm32l1xx.c" is generated by an automatic clock configuration 
      system and can be easily customized to your own configuration. 
      To select different clock setup, use the "STM32L1xx_Clock_Configuration_V1.1.0.xls" 
      provided with the AN3309 package available on <a href="http://www.st.com/internet/mcu/family/141.jsp">  ST Microcontrollers </a>
         
@par Hardware and Software environment

  - This example runs on STM32L1xx Ultra Low Power High-, Medium-Density and Medium-Density Plus Devices.
  
  - This example has been tested with STMicroelectronics STM32L152D-EVAL (STM32L1xx 
    Ultra Low Power High-Density) and STM32L152-EVAL (STM32L1xx Ultra Low 
    Power Medium-Density) evaluation board and can be easily tailored to any 
    other supported device and development board.

  - STM32L152-EVAL Set-up
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.00, PD.01, PD.04
      and PD.05 pins
    - LCD Glass pins is shared with USART3 via jumpers, so make sure that
         Jumper 7 (JP7) is in position 1<-->2.
         Jumper 8 (JP8) is in position 1<-->2.

  - STM32L152D-EVAL Set-up
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.03, PD.07, PG.14
      and PG.15 pins
    - LCD Glass pins is shared with IOs, so make sure that the LCD Glass is in 
      LCD position

      
@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\STM32L1xx_StdPeriph_Templates
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - Run the example

@note
- Ultra Low Power Medium-density devices are STM32L151xx and STM32L152xx 
  microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
- Ultra Low Power Medium-density Plus devices are STM32L151xx, STM32L152xx and 
  STM32L162xx microcontrollers where the Flash memory density is 256 Kbytes.
- Ultra Low Power High-density devices are STM32L151xx, STM32L152xx and STM32L162xx 
  microcontrollers where the Flash memory density is 384 Kbytes.
    
 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */


