文件列表:

DMA\main.c (9583, 2008-09-23)
DMA\stm32f10x_conf.h (6305, 2008-09-23)
DMA\stm32f10x_it.c (29064, 2008-09-23)
DMA\stm32f10x_it.h (3842, 2008-09-23)
DMA (0, 2010-03-11)

/******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** * File Name : readme.txt * Author : MCD Application Team * Version : V2.0.1 * Date : 06/13/2008 * Description : Description of the TIM DMA 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 provides a description of how to use DMA with TIM1 Update request to transfer Data from memory to TIM1 Capture Compare Register3. TIM1CLK = 72 MHz, Prescaler = 0, TIM1 counter clock = 72 MHz The TIM1 Channel3 is configured to generate a complementary PWM signal with a frequency equal to: TIM1 counter clock / (TIM1_Period + 1) = 17.57 KHz The TIM1 Channel3 is configured to generate a complementary PWM signal with a frequency equal to 17.578 KHz and a variable duty cycle that is changed by the DMA after a specific number of Update event. The number of this repetitive requests is defined by the TIM1 Repetion counter, each 3 Update Requests, the TIM1 Channel3 Duty Cycle changes to the next new value defined by the SRC_Buffer. Directory contents ================== stm32f10x_conf.h Library Configuration file stm32f10x_it.c Interrupt handlers stm32f10x_it.h Interrupt handlers header file main.c Main program Hardware environment ==================== This example runs on STMicroelectronics STM3210B-EVAL and STM3210E-EVAL evaluation boards and can be easily tailored to any other hardware. There is no need for any modification when switching between these two boards. Connect the pins - TIM1 CH3 (PA.10) - TIM1 CH3N (PB.15) to an oscilloscope to monitor the different waveforms. How to use it ============= In order to make the program work, you must do the following: - Create a project and setup all your toolchain's start-up files - Compile the directory content files and required Library files: + stm32F10x_lib.c + stm32F10x_tim.c + stm32F10x_gpio.c + stm32F10x_rcc.c + stm32F10x_dma.c + stm32F10x_nvic.c + stm32F10x_flash.c - Link all compiled files and load your image into target memory - Run the example ******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE******

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