DMA
所属分类:嵌入式/单片机/硬件编程
开发工具:C++
文件大小:40KB
下载次数:21
上传日期:2010-04-01 15:20:10
上 传 者:
wsrylb
说明: STM32的DMA代码需要的可以下载!!
(STM32' s DMA code needed to download! !)
文件列表:
DMA\ADC_TIM1\main.c (7047, 2009-04-06)
DMA\ADC_TIM1\stm32f10x_conf.h (3195, 2009-04-06)
DMA\ADC_TIM1\stm32f10x_it.c (4374, 2009-04-06)
DMA\ADC_TIM1\stm32f10x_it.h (1888, 2009-04-06)
DMA\ADC_TIM1 (0, 2002-01-01)
DMA\FLASH_RAM\main.c (6638, 2009-04-06)
DMA\FLASH_RAM\stm32f10x_conf.h (3205, 2009-04-06)
DMA\FLASH_RAM\stm32f10x_it.c (5201, 2009-04-06)
DMA\FLASH_RAM\stm32f10x_it.h (1927, 2009-04-06)
DMA\FLASH_RAM (0, 2002-01-01)
DMA\FSMC\fsmc_sram.c (7022, 2009-04-06)
DMA\FSMC\fsmc_sram.h (1799, 2009-04-06)
DMA\FSMC\main.c (7309, 2009-04-06)
DMA\FSMC\stm32f10x_conf.h (3197, 2009-04-06)
DMA\FSMC\stm32f10x_it.c (4361, 2009-04-06)
DMA\FSMC\stm32f10x_it.h (1884, 2009-04-06)
DMA\FSMC (0, 2002-01-01)
DMA\I2C_RAM\main.c (8571, 2009-04-06)
DMA\I2C_RAM\stm32f10x_conf.h (3200, 2009-04-06)
DMA\I2C_RAM\stm32f10x_it.c (4365, 2009-04-06)
DMA\I2C_RAM\stm32f10x_it.h (1887, 2009-04-06)
DMA\I2C_RAM (0, 2002-01-01)
DMA\SPI_RAM\main.c (10623, 2009-04-06)
DMA\SPI_RAM\stm32f10x_conf.h (3200, 2009-04-06)
DMA\SPI_RAM\stm32f10x_it.c (4367, 2009-04-06)
DMA\SPI_RAM\stm32f10x_it.h (1887, 2009-04-06)
DMA\SPI_RAM (0, 2002-01-01)
DMA (0, 2002-01-01)
/**
@page DMA_FSMC DMA_FSMC
@verbatim
******************** (C) COPYRIGHT 2009 STMicroelectronics *******************
* @file DMA/FSMC/readme.txt
* @author MCD Application Team
* @version V3.0.0
* @date 04/06/2009
* @brief Description of the DMA FSMC 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 provides a description of how to use two DMA channels to transfer a
word data buffer from Flash memory to external SRAM memory and to recuperate the written
data from external SRAM to be stored in internal SRAM.
DMA2 Channel5 is configured to transfer, word by word, the contents of a 32-word data
buffer stored in Flash memory to the external SRAM memory interfaced by FSMC. The start
of transfer is triggered by software. DMA2 Channel5 memory-to-memory transfer is enabled.
Source and destination address incrementing is also enabled. The transfer is started by
setting the Channel enable bit for DMA2 Channel5. A polling on the Transfer Complete flag
is done to check the end of transfer. The DMA2 Channel5 Transfer complete flag is then cleared.
DMA1 Channel3 is configured to transfer, byte by byte, the contents of the first 128Bytes
of external SRAM to the internal SRAM memory. The start of transfer is triggered by software.
DMA1 Channel3 memory-to-memory transfer is enabled. Source and destination address
incrementing is also enabled. The transfer is started by setting the Channel enable bit for
DMA1 Channel3. A polling on the Transfer Complete flag is done to check the end of transfer.
the DMA1 Channel3 Transfer complete flag is then cleared.
A comparison between the source and destination buffers is done to check that all data have been
correctly transferred.
@par Directory contents
- DMA/FSMC/stm32f10x_conf.h Library Configuration file
- DMA/FSMC/stm32f10x_it.c Interrupt handlers
- DMA/FSMC/stm32f10x_it.h Interrupt handlers header file
- DMA/FSMC/main.c Main program
- DMA/FSMC/fsmc_sram.c FSMC SRAM driver
- DMA/FSMC/fsmc_sram.h Header for the fsmc_sram.c file
@par Hardware and Software environment
- This example runs only on STM32F10x High-Density Devices.
- This example has been tested with STMicroelectronics STM3210E-EVAL (STM32F10x
High-Density) evaluation board and can be easily tailored to any other
supported device and development board.
@par How to use it ?
In order to make the program work, you must do the following :
- Create a project and setup all project configuration
- Add the required Library files :
- stm32f10x_dma.c
- stm32f10x_rcc.c
- stm32f10x_fsmc.c
- stm32f10x_gpio.c
- system_stm32f10x.c
- Edit stm32f10x.h file to select the device you are working on (#define
STM32F10X_HD, in this case).
@b 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.
- Link all compiled files and load your image into target memory
- Run the example
@note
- Low-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 16 and 32 Kbytes.
- Medium-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 32 and 128 Kbytes.
- High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
*
© COPYRIGHT 2009 STMicroelectronics
*/
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