键盘.c

4X4矩阵键盘+LCD1602显示,可以开发好多功能

 #include <AT89X51.h> 
 #include <1602.c>
 unsigned char a[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,},b[4],c=0x01;
 unsigned int jianzhi;
 void key(void)
{
 unsigned int hengzhi,leizhi=0,n,r=0x01;

 if(P3_0==0)
 hengzhi=0;
 if(P3_1==0)
 hengzhi=1;
 if(P3_2==0)
 hengzhi=2;
 if(P3_3==0)
 hengzhi=3;
 for(n=0;n<4;n++)
 {
  P1=~(r<<n);
 if((P3_0&&P3_1&&P3_2&&P3_3)!=1)
  leizhi=n;
 }
	 
  jianzhi=hengzhi*4+leizhi;
 
 }

 void main(void) 
{
 uchar i;
 chushihua();
 Delay1ms(10);
 wzhilin(0x80|0x00);
 i=0x00;
 while(i!=0x010)
 {
  wshuju(lcd1[i]);
  i++;
  }
 while(1)
 {

 P1=0x00;
 jianche:
 while((P3_0&&P3_1&&P3_2&&P3_3)==1)
 {
  	wzhilin(0x80|0x40);
   wshuju(lcd3[jianzhi]);
 }
 Delay1ms(10);
 if((P3_0&&P3_1&&P3_2&&P3_3)==1)
 goto jianche;
  
  key();
  
  while((P3_0&&P3_1&&P3_2&&P3_3)!=1)
   {
   	wzhilin(0x80|0x40);
   wshuju(lcd3[jianzhi]);
   }
  
  }
}