DAC_DualModeDMA_SineWave

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    DAC/DualModeDMA_SineWave/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the DAC dual mode sine wave 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.
  ******************************************************************************
   
Example Description

This example describes how to use DAC dual channel mode with DMA to generate sine waves on both DAC channels outputs.

Both DAC channels conversions are configured to be triggered by TIM2 TRGO triggers and without noise/triangle wave generation. 12bit right data alignement is selected since we choose to acces DAC_DHR12RD register. DMA2 channel4 is configured to transfer continuously, word by word, a 32-word buffer to the dual DAC register DAC_DHR12RD.

The transfered 32buffer is made to have a sine wave generation on each DAC channel output. Both DAC channels are then enabled. Only DAC channel2 DMA capability is enabled.

Once TIM2 is enabled, each TIM2 TRGO update event generate a DMA request which transfer data to the dual DAC register and DAC conversion is started. The sine waves can be visualized by connecting both PA.04 and PA.05 pins to an oscilloscope.

Directory contents
Hardware and Software environment
How to use it ?

In order to make the program work, you must do the following:

Tip: You can tailor the provided project template to run this example, for more details please refer to "stm32f10x_stdperiph_lib_um.chm" user manual; select "Peripheral Examples" then follow the instructions provided in "How to proceed" section.

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 devices are STM32F101xx and STM32F103xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
  • High-density Value line devices are STM32F100xx 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.

© COPYRIGHT 2010 STMicroelectronics

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