main.c

构造一个最小的PHILIPS LPC2131系统, 实现最基本功能, 包含线路图和KEIL源程序

/* $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$  Copyright (c)  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
$												肖遥电子（广州）研发中心
$										Shawyoo Electronics (GuangZhou) R&D Center
$                       	http://www.shawyoo.com		 Email: [e-mail]
$								 QQ群：9069471/9069433/9524253		All rights reserved.	  
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$  Copyright (c)  $$$$$$$$$$$$$$$$$$$$$$$$$$$ */
/*  
                                      文件描述
	文件名:   Main.c
	功能描述：Keil for ARM 最简单的一个指示灯的系统，只需写以下几行代码
				 启动代码在建立工程时加入即可（文件名为<<Startup.s>>），也可以从安装目录
				 把启动文件Copy过来.PLL的默认倍频是5
	编译环境：Keil for ARM
	目标CPU:  LPC21xx
	作者：    肖建辉
	创建时间：
	建议编辑环境：UltraEdit 11.00a+  制表符宽度为三个字符，程序可读性更好。
$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
*/
				  
#include		<LPC213x.h>
#include		<string.h>

/* $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
   所需的一些预定义
*/	 
#define		NOP()       __asm{NOP}		 			// 空操作定义
#define    	LED_PIN     25							   // 第10脚驱动LED

#define    	LED_ON      (IOSET0 = (1<<LED_PIN))
#define    	LED_OFF     (IOCLR0 = (1<<LED_PIN))

#define		SET_LED_PIN_OUTPUT	 (IODIR0 |= (1<<LED_PIN))

void			Delay_mS(unsigned char  c);


/* $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
	函数名称：main
   功能描述：C语言主函数
   入口参数：无
   出口参数：无
   全局变量: 无
   创建时间：
   修改时间：
	注：   // CPU频率 11.0592M * 5
*/ 	
void			Delay_mS(unsigned char  c);
// $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 以上原形声明的函数供本函数调用
void        main(void)
{
	 	
    SET_LED_PIN_OUTPUT;  
    while(1)
    {	    
       LED_ON;     		// 
       Delay_mS(100);   // 
       LED_OFF;    		// 
       Delay_mS(100);   // 
    }
}	// End of <main> function


/* $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
   函数名称: Delay_mS
   功能描述：以ms为单位的延时程序           
   入口参数：延时时间
   出口参数：无   
	全局变量：无
	创建时间：
	修改时间：
	注：    CPU频率 11.0592M * 5
*/	 
void       Delay_mS(unsigned char  c)  
{
     unsigned char	i;
	  unsigned int    j;
     for(i=0;i<c;i++)
     {
        for(j=0;j<3800;j++)
		  { NOP(); NOP(); NOP(); NOP(); NOP(); NOP(); }
     }
}	// End of <Delay_mS> function


/*
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 */