CortexM3
所属分类:处理器开发
开发工具:Visual C++
文件大小:16KB
下载次数:22
上传日期:2009-02-01 23:59:47
上 传 者:
susan_fly
说明: stm32F103库文件,CORTEX-M3,C语言描述
(stm32F103 library files, CORTEX-M3, C language description)
文件列表:
CortexM3\Example1\main.c (7308, 2007-10-08)
CortexM3\Example1\stm32f10x_conf.h (5588, 2007-10-08)
CortexM3\Example1\stm32f10x_it.c (22693, 2007-10-08)
CortexM3\Example1\stm32f10x_it.h (3267, 2007-10-08)
CortexM3\Example2\main.c (7414, 2007-10-08)
CortexM3\Example2\stm32f10x_conf.h (5588, 2007-10-08)
CortexM3\Example2\stm32f10x_it.c (22761, 2007-10-08)
CortexM3\Example2\stm32f10x_it.h (3267, 2007-10-08)
CortexM3\Example1 (0, 2009-01-30)
CortexM3\Example2 (0, 2009-01-30)
CortexM3 (0, 2009-01-30)
/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name : readme.txt
* Author : MCD Application Team
* Version : V1.0
* Date : 10/08/2007
* Description : Description of the CortexM3 Example1.
********************************************************************************
* 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.
*******************************************************************************/
本例示范了如何利用STM32的CortexM3内核的Bit-Band访问功能来实现对SRAM中的某个变量进行单个比特的读写修改操作。
对位于SRAM内Bit-Band的字进行操作(取值0x00或者0x01),等同于对目标变量的相应位进行同样的操作。
对应公式如下:
bit_word_addr = bit_band_base + (byte_offset x 32) + (bit_number x 4)
例如:0x23FFFFFC = 0x22000000 + (0xFFFFF*32) + 7*4
对0x23FFFFFC进行操作,等同于对位于0x200FFFFC的变量第7位进行操作。
Example description
===================
This example shows how to use CortexM3 Bit-Band access to perform atomic read-modify-write
and read operations on a varaible in SRAM.
Directory contents
==================
stm32f10x_conf.h Library Configuration file
stm32f10x_it.c Interrupt handlers
stm32f10x_it.h Header for stm32f10x_it.c
main.c Main program
Hardware environment
====================
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_nvic.c
+ stm32f10x_rcc.c
+ stm32f10x_lib.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******
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