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RM51单片机实验板配套实验例程库

/*-------------------------------------
On-line operating system V1.0
MCU W78E516  XAL 12MHz
Build by Gavin Hu, 2005.4.25
--------------------------------------*/
/*使用微机的超级中断口控制,波特率为19200*/
//
#include <reg52.h>         //52单片机定义文件
#include <stdio.h>         //基本输入输出函数
#include <string.h>        //字符串处理函数
#include <ctype.h>         //字符处理函数
sbit ekp0 =P2^0;           //模拟控制设备口,共6个       
sbit ekp1 =P2^1;
sbit ekp2 =P2^2;
sbit ekp3 =P2^3;
sbit ekp4 =P2^4;
sbit ekp5 =P2^5;
/*--------------------------------------
   void main(void)
---------------------------------------*/
void main(void)
{ 
unsigned char i,ch;
char chs[9]="\0";        //定义9个字符接收单元
SCON  = 0x50;            //串口方式1
T2CON = 0x30;            //T2作波特率发生器,16位自动重装模式
RCAP2L= 0xec;            //波特率为19200时初值
TL2   = 0xec;            //
RCAP2H= 0xff;            //
TH2   = 0xff;            //
TI    = 1;               //
TR2   = 1;               //开波特率发生器
printf("\n");            //换行
while (1)
  {
  printf("%s","\n\t    On-line operating system V1.0\n");  //系统开机显示字符
  printf("%s","\tBuild by Gavin Hu, all right reserved.\n");
  while (1)
    {
    printf("%s","\nPlease input password:");              //提示输入口令
	scanf("%s",chs);                                      // 接收状态
    if (strcmp(chs,"12345678"))                           //与系统密码比较
      printf("%s","Password error\n");                    //口令错提示,等待重新输入口令
	  else break;                                         // 口令正确,进入操作控制状态
	}
  while (1)
    {
    printf("%s","\nOn-line operating system>");     //在线控制提示符    
	scanf("%s",chs);                                //接收字符串
	for (i=0; i<4; i++)                             //将字符转换为大写
	  chs[i]=toupper(chs[i]);
	if (!strcmp(chs,"EXIT")) break;                 //如为退出命令,退出在线控制
	i=strlen(chs);                                  //取字符串长度
	ch=chs[2];                                      //取最后一个字符
	chs[2]='\0';                                    //最后一个字符单元为00
	if (i>3||strcmp(chs,"OP")||ch<'0'||ch>'5')      //如字符串长度大于3或前二个不等于"OP"或最后一个数小于0或大于5//
	  {printf("%s","Bad command\n"); continue;}     //提示命令错,重新开始接收字符
	printf("%s%c ","Equipment No:",ch);             //命令正确,显示设备号
	switch (ch)
      {
	  case '0': if (ekp0) {ekp0=0; printf("%s","on\n"); break;}//按最后一位数对端口操作并显示"on"或"off"
	              else {ekp0=1; printf("%s","off\n"); break;}
	  case '1': if (ekp1) {ekp1=0; printf("%s","on\n"); break;}
	              else {ekp1=1; printf("%s","off\n"); break;}
	  case '2': if (ekp2) {ekp2=0; printf("%s","on\n"); break;}
	              else {ekp2=1; printf("%s","off\n"); break;}
	  case '3': if (ekp3) {ekp3=0; printf("%s","on\n"); break;}
	              else {ekp3=1; printf("%s","off\n"); break;}
	  case '4': if (ekp4) {ekp4=0; printf("%s","on\n"); break;}
	              else {ekp4=1; printf("%s","off\n"); break;}
	  case '5': if (ekp5) {ekp5=0; printf("%s","on\n"); break;}
	              else {ekp5=1; printf("%s","off\n"); break;}
	  default:  break;	
	  }
	}
  }
}
/***************************end********************************/