/**
  @page DAC one Channel basic output example
  
  @verbatim
  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    DAC_OneChannel_Basic/readme.txt 
  * @author  Zhijun SUN
  * @version V1.0.0
  * @date    17-April-2014
  * @brief   Description of the DAC one channel basic output 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 describes how to use DAC to output voltage according to DAC channel data on 
STM32L-DISCOVERY. 

The DAC channel 1 is configured with output buffer disabled.

DAC channel 1 data can be edited to output voltage which user desire in main(), using 
DAC_SetChannel1Data function. The default DAC channel 1 data in code is set to be
DAC_SetChannel1Data(DAC_Align_12b_R, 0x0FFF).

The voltage is outputted on DAC_OUT1 (PA4).

@par Directory contents 

  - DAC_OneChannel_Basic/stm32l1xx_conf.h    Library Configuration file
  - DAC_OneChannel_Basic/stm32l1xx_it.c      Interrupt handlers
  - DAC_OneChannel_Basic/stm32l1xx_it.h      Interrupt handlers header file
  - DAC_OneChannel_Basic/main.c              Main program
  - DAC_OneChannel_Basic/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 STM32-DISCOVERY 
    (STM32L1xx Ultra Low Power Medium-Density) evaluation board and can be easily 
    tailored to any other supported device and development board.

  - STM32-DISCOVERY Set-up
    @note Make sure that the LCD which PA4 connect must be taken off.
    @note Make sure that SB2 which connect PA4 to Idd measurement circuit must be broken. 
    - Connect PA4 (DAC_OUT1) pin to an oscilloscope or Voltage meter.
    
@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>
 */


