readme.txt

一些程序开发的样例

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : readme.txt
* Author             : MCD Application Team
* Version            : V1.0
* Date               : 10/08/2007
* Description        : Description of the TIM1 Example5.
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE 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
====================
Connect the pins 
- TIM1 CH3  (PA.10)
- TIM1 CH3N (PB.15 )
to an oscilloscope to show the 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_tim1.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 either RAM or Flash
- Run the example


******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE******