Mercurial > ~darius > hgwebdir.cgi > stm32temp
view libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/DAC/DualModeDMA_SineWave/readme.txt @ 8:58d76cf522ff
Split out code into separate files.
author | Daniel O'Connor <darius@dons.net.au> |
---|---|
date | Sat, 04 Feb 2012 13:29:31 +1030 |
parents | c59513fd84fb |
children |
line wrap: on
line source
/** @page DAC_DualModeDMA_SineWave DAC dual mode sine wave example @verbatim ******************** (C) COPYRIGHT 2011 STMicroelectronics ******************* * @file DAC/DualModeDMA_SineWave/readme.txt * @author MCD Application Team * @version V3.5.0 * @date 08-April-2011 * @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. ****************************************************************************** @endverbatim @par 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 alignment is selected since we choose to access 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 transferred 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. @par Directory contents - DAC/DualModeDMA_SineWave/stm32f10x_conf.h Library Configuration file - DAC/DualModeDMA_SineWave/stm32f10x_it.c Interrupt handlers - DAC/DualModeDMA_SineWave/stm32f10x_it.h Header for stm32f10x_it.c - DAC/DualModeDMA_SineWave/main.c Main program - DAC/DualModeDMA_SineWave/system_stm32f10x.c STM32F10x system source file @par Hardware and Software environment - This example runs on STM32F10x Connectivity line, High-Density, High-Density Value line, XL-Density, Medium-Density Value line and Low-Density Value line Devices. - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density Value line), STM32100B-EVAL (Medium-Density Value line), STM3210C-EVAL (Connectivity line) and STM3210E-EVAL (High-Density and XL-Density) evaluation boards and can be easily tailored to any other supported device and development board. - STM32100E-EVAL Set-up - Connect PA.04 and PA.05 pins to an oscilloscope - STM32100B-EVAL Set-up - Connect PA.04 and PA.05 pins to an oscilloscope - STM3210C-EVAL Set-up - Only PA.04 can be monitored on an oscilloscope, PA.05 is used by other module (Motor control connector) that prevents to have DAC channel output on it. However, if you don't use Motor control connector, you can remove the 0ohm resistor R84 and thus PA.05 can be used for DAC output. @note Make shure that jumper JP15 is open. - STM3210E-EVAL Set-up - Connect PA.04 and PA.05 pins to an oscilloscope @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\STM32F10x_StdPeriph_Template - Open your preferred toolchain - Rebuild all files and load your image into target memory - Run the example @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. * <h3><center>© COPYRIGHT 2011 STMicroelectronics</center></h3> */