/**
  @page COMP_AnalogWatchdog COMP Analog Watchdog example
  
  @verbatim
  ******************** (C) COPYRIGHT 2012 STMicroelectronics *******************
  * @file    COMP/COMP_AnalogWatchdog/readme.txt 
  * @author  MCD Application Team
  * @version V1.1.1
  * @date    13-April-2012
  * @brief   Description of the COMP Analog Watchdog 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 make an analog watchdog using the STM32L1xx COMPs 
peripherals in window mode:
  - The upper threshold is set to VREFINT = 1.22V
  - The lower threshold is set to VREFINT / 4 = 1.22V = 0.305V
  - The input voltage is configured to be connected to PB5 (On STM32L152-EVAL 
    and STM32L152D-EVAL: RV3 is used to simulate an input voltage)

If the input voltage is above the higher threshold, LD3 and LD1 are turned On.
If the input voltage is under the lower threshold, LD2 and LD4 are turned On.
If the input voltage is within the thresholds, the MCU remains in STOP mode
and all leds are turned Off.

@par Directory contents 

  - COMP/COMP_AnalogWatchdog/stm32l1xx_conf.h     Library Configuration file
  - COMP/COMP_AnalogWatchdog/stm32l1xx_it.c       Interrupt handlers
  - COMP/COMP_AnalogWatchdog/stm32l1xx_it.h       Header for stm32l1xx_it.c
  - COMP/COMP_AnalogWatchdog/main.h               Main Header file
  - COMP/COMP_AnalogWatchdog/main.c               Main program
  - COMP/COMP_AnalogWatchdog/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
    - Make sure that JP10 is in TRST position
      @note This example run in stand alone mode.
    - Make sure that JP17 is set in PB5 position (to connect Potentiometer RV3
      to COMP2 non inverting input)
    - Make sure that JP18 and JP19 are connected
    - Remove jumper JP11

  - STM32L152D-EVAL Set-up
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.03, PD.07 ,PG.14
      and PG.15 pins
      @note This example run in stand alone mode.
    - Make sure that JP13 is set in PB5 position (to connect Potentiometer RV3
      to COMP2 non inverting input)
      - Remove jumper JP14
            
@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>
 */


