/**
  @page ADC_DualModeRegulSimu  Dual regular simultaneous mode and DMA mode1 example

  @verbatim
  ******************** (C) COPYRIGHT 2013 STMicroelectronics *******************
  * @file    ADC/ADC_DualModeRegulSimu/readme.txt
  * @author  MCD Application Team
  * @version V1.3.0
  * @date    13-November-2013
  * @brief   Description of the Dual regular simultaneous mode and DMA mode1
  *          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 use the ADC peripheral to convert regular channels 
simultaneously in dual mode using DMA in mode 1.

Regular simultaneous mode is performed on a regular group of channels. 
In Dual ADC mode, ADC1 data are transferred on the first request, ADC2 data are
transferred on the second request and so on.
On each DMA request (one data item is available), a half-word representing an
ADC-converted data item is transferred.
The conversion is triggered by software.

The ADC1 is configured to convert ADC Channel 10 and 11.
The ADC2 is configured to convert ADC Channel 11 and 12.

Note: the sequence length must be the same for both ADCs

In this example, the system clock is 144MHz, APB2 =72MHz and ADC clock = APB2 /2.
So ADCCLK= 36MHz 

Conversion rate of channel 10 and 12 = 30 cycles => Conversion Time = 36M/30cyc = 1.2Msps.
Conversion rate of channel 11 = 15 cycles => Conversion Time = 36M/15cyc = 2.4Msps.

 @note Refer to "simulation.xls" file to have the diagram simulation of the example.


@par Directory contents 
 
  - ADC/ADC_DualModeRegulSimu/system_stm32f4xx.c   STM32F4xx system clock configuration file
  - ADC/ADC_DualModeRegulSimu/stm32f4xx_conf.h     Library Configuration file
  - ADC/ADC_DualModeRegulSimu/stm32f4xx_it.c       Interrupt handlers
  - ADC/ADC_DualModeRegulSimu/stm32f4xx_it.h       Interrupt handlers header file
  - ADC/ADC_DualModeRegulSimu/main.c               Main program
  - ADC/ADC_DualModeRegulSimu/main.h               Main program header file


@par Hardware and Software environment 

  - This example runs on STM32F405xx/407xx, STM32F415xx/417xx, STM32F427xx/437xx and 
    STM32F429xx/439xx devices.
    
  - This example has been tested with STMicroelectronics STM324xG-EVAL (STM32F40xx/
    STM32F41xx Devices), STM32437I-EVAL (STM32F427xx/STM32F437xx Devices) and 
    STM324x9I-EVAL RevB (STM32F429xx/STM32F439xx Devices) evaluation boards and 
    can be easily tailored to any other supported device and development board.

  - STM324xG-EVAL, STM32437I-EVAL and STM324x9I-EVAL RevB Set-up 
    - Connect PC.0, PC.1 and PC.2 to a power supply (do not forget to connect the
      power supply GND to the EVAL board GND)


@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\STM32F4xx_StdPeriph_Templates
 - Open your preferred toolchain 
 - Select the project workspace related to the used device 
   - If "STM32F40_41xxx" is selected as default project Add the following files in the project source list:
     - Utilities\STM32_EVAL\STM3240_41_G_EVAL\stm324xg_eval.c
        
   - If "STM32F427_437xx" is selected as default project Add the following files in the project source list:
     - Utilities\STM32_EVAL\STM324x7I_EVAL\stm324x7i_eval.c
          
   - If "STM32F429_439xx" is selected as default project Add the following files in the project source list:
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval.c
                 
 - Rebuild all files and load your image into target memory
 - Run the example
  
 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */
