yejing.c

液晶显示程序

#include<reg51.h>
#include<absacc.h>
#include<stdio.h>
//定义变量类型  
#define unchar unsigned char
void INITIAL(void);       /*液晶显示初始化 */
void CLEAR(void);          /*液晶显示清屏 */
void  locate(unchar page,column);    /*指定首字符显示位置 */
void KEY(void);              /*按键识别 */ 
void show(void);       /*从当前位置开始显示显示缓冲区BUFFER中的内容 */
char data BUFFER[15];    /*显示缓冲区 */		
unchar data NDIG;        /*待显示的字符数 */
unchar data KEYSTATE;    /*键值 */
/*存放每个键被按下的次数 */	
int xdata k1=0,k2=0,k3=0,k4=0,k5=0,k6=0,k7=0;k8=0;
int xdata k9=0,k0=0,kx=0,kj=0,km1=0,km2=0,km3=0,km4=0;
int xdata sumup=0;       /*测试用的变量 */
//main()主函数，初始化变量和液晶的初始显示内容
void main(void)
{
  unchar i;
  INITIAL();     /*显示初始化 */
  CLEAR();         /*清屏 */
  //从page3,column4开始显示“sumup=rdy” 
  //固定长度的字符串显示
  locate(3,4);
  NDIG=sprintf(BUFFER,"sumup=rd");
  show();        //显示子函数 
  sumup=12345;
  locate(2,4);
  NDIG=sprintf(BUFFER,"sumup=%d",sumup);
  show();
  //按键查询方式显示初始内容 */
  for(;;)
  {
    KEY();
	while(KEYSTATE)
	{
	 switch(KEYSTATE)
	 {
	   case  0xb7:k0+=1;break;
	   case  0x7e:k1+=1;break;
	   case  0xbe:k2+=1;break;
	   case  0xde:k3+=1;break;
	   case  0x7d:k4+=1;break;
	   case  0xbd:k5+=1;break;
	   case  0xdd:k6+=1;break;
	   case  0x7b:k7+=1;break;
	   case  0xbb:k8+=1;break;
	   case  0xdb:k9+=1;break;
	   case  0xee:km1+=1;break;
	   case  0xed:km2+=1;break;
	   case  0xeb:km3+=1;break;
	   case  0xe7:km4+=1;break;
	   case  0x77:kx+=1;break;
	   case  0xd7:kj+=1;break;
	  }
	   KEYSTATE=0;
	 }
	 locate(0,2);
	 NDIG=sprintf(BUFFER,"k1:%d",k1);
	 show();
	  locate(0,32);
	 NDIG=sprintf(BUFFER,"k2:%d",k2);
	 show();
	  locate(0,62);
	 NDIG=sprintf(BUFFER,"k3:%d",k3);
	 show();
	  locate(0,92);
	 NDIG=sprintf(BUFFER,"k4:%d",k4);
	 show();
	  locate(1,2);
	 NDIG=sprintf(BUFFER,"k5:%d",k5);
	 show();
	  locate(0,32);
	 NDIG=sprintf(BUFFER,"k6:%d",k6);
	 show();
	  locate(0,62);
	 NDIG=sprintf(BUFFER,"k7:%d",k7);
	 show();
	  locate(0,92);
	 NDIG=sprintf(BUFFER,"k8:%d",k8);
	 show();
	}
 }