_main.c

国产键盘、显示芯片CH451在ADUC845下的程序

																										  //CH451
//AT89C51 C语言程序
//Web: http//winchiphead.com
//Author: yhw  2003.7

//功能  开机后在最低位置1，其余清零；按下键后，左移两位，在低两位显示
//十进制键值，如果按住键不放，最低位小数点点亮，释放后小数点熄灭。

#include "ADuC845.h"
//如果使用键盘中断请定义
#define  USE_KEY  1
unsigned char  ch451_key;		                // 存放键盘中断中读取的键值
#include "ch451.h"
//须主程序定义的参数





//*************************************************
 //延时程序
 void delay(){					//在12P下延时十毫秒
   unsigned char i,j,k;
   for(i=0;i<10;i++)
     for(j=0;j<40;j++)
       for(k=0;k<120;k++);
  }

//************************************************
void main(){
   unsigned char a;
   ch451_write(CH451_RESET);
   ch451_init();                                  //调用初始化
   
   ch451_write(0x403);
   
   ch451_write(0x580);                           //测试送入命令
   ch451_write(CH451_DIG0|0X01);                 //最低位显示1
   EA=1;
   ch451_key=0x0ff;
   while(1){
    while(ch451_key==0xff);	                //等待中断
    a=ch451_key;
    //d=a;
    ch451_key=0x0ff;
    ch451_write(CH451_RIGHTMOV);		              //左移两位
    //ch451_write(0x300);
    //a&=0x3f;			             //显示十进制数据
    //b=a;
    //a/=10;
	switch(a)
	{
	case  0x5c:	  ch451_write(CH451_DIG7|0x00);	   break;
	case  0x54:	  ch451_write(CH451_DIG7|0x01);	   break;
	case  0x4c:	  ch451_write(CH451_DIG7|0x02);	   break;
	case  0x44:	  ch451_write(CH451_DIG7|0x03);	  break;

	case  0x5d:	  ch451_write(CH451_DIG7|0x04);	   break;
	case  0x55:	  ch451_write(CH451_DIG7|0x05);	  break;
	case  0x4d:	  ch451_write(CH451_DIG7|0x06);	  break;
	case  0x45:	  ch451_write(CH451_DIG7|0x07);	 break;

	case  0x5e:	  ch451_write(CH451_DIG7|0x08);	 break;
	case  0x56:	  ch451_write(CH451_DIG7|0x09);	break;


	default:   ch451_write(CH451_DIG7|0x80); break;

	}
    //ch451_write(CH451_DIG1|a);
    //b%=10;
    //ch451_write(CH451_DIG0|b);
     //delay();
     //c=ch451_read();
     //while(c==d)		           //测试按键是否释放
     //{
     // ch451_write(CH451_DIG0|b|0x80);
      //delay();
     // c=ch451_read();
    // }
    //ch451_write(CH451_DIG0|b);
 }
}