DAC_TwoChannels_TriangleWave

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    DAC/TwoChannels_TriangleWave/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the DAC two channels triangle 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 two DAC channels to generate two different signals with triangle waves on each DAC Channel output.

DAC channels conversion are configured to be triggered by TIM2 TRGO with triangle wave generation. 12bit right data alignement is selected since we choose to acces both DAC_DHR12R1 and DAC_DHR12R2 registers. A triangle amplitude of 2047 is selected for DAC channel1 and 1023 for DAC channel2. Both DAC channels are then enabled. DAC Channel1 DHR12R1 and DAC channel2 DHR12R2 registers are set to have a base output voltage of VREF/16 on each output.

Once TIM2 is enabled, each TIM2 TRGO update event trigger both DAC channels start of conversion. The triangle counter is incremented, added to the base value and applied to the corresponding DAC channel output. The same calculation is repeated on each trigger. The triangle 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 Value line devices are STM32F100xx microcontrollers where the Flash memory density ranges between 256 and 512 Kbytes.
  • High-density devices are STM32F101xx and STM32F103xx 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

STM32F10x Standard Peripherals Library: Footer

 

 

 

      For complete documentation on STM32(CORTEX M3) 32-bit Microcontrollers platform visit  www.st.com/STM32