/key_164_led_2

#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
unsigned char key,ledk[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0xf3};
unsigned char mask=0xef;
sbit P37=P3^7;sbit clk=P1^2;sbit sda=P1^2;sbit P10=P^0;               //74LS164
void shift(unsigned char dx)
{static unsigned char d;
   unsigned char j=0;
    d=dx;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
	   d<<=1;j++;}  }
/key_164_led_2

#include <stdio.h>
#include <reg51.h>
#include <intrins.h>
unsigned char key,ledk[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0xf3};
unsigned char mask=0xef;
sbit P37=P3^7;sbit clk=P1^2;sbit sda=P1^2;sbit P10=P^0;               //74LS164
void shift(unsigned char dx)
{static unsigned char d;
   unsigned char j=0;
    d=dx;
   	while(j<8)
	{if((d&0x80)!=0) sda=1;
       else  sda=0;
	   clk=0;clk=1;
	   d<<=1;j++;}  }
unsigned char get_char(void)
{unsigned char	key_code;
  static unsigned char column=0;
  if (P37!=0)key_code=0xff;
     else key_code=column;
  mask=_crol_(mask,1);
  if (mask==0xfe)mask=0xef;
  column++;
  if(column>3)column=0; 
  return(key_code);}
void key_func(key)  //設(shè)定液位高度
 {switch (key)
   {case 0:  shift(ledk[1]);break;
    case 1:  shift(ledk[2]);break;
    case 2:  shift(ledk[3]);break;
    case 3:  shift(ledk[4]);break;
    default: break;}  }
void main(void)
{shift(ledk[5]);P2=0xfe; 
while(1)
     {key=get_char( );key_func(key);P2=mask&0xfe;}		   
 }


void key_func(key)
 {switch (key)
   {case 0:  shift(ledk[1]);break;
    case 1:  shift(ledk[2]);break;
    case 2:  shift(ledk[3]);break;
    case 3:  shift(ledk[4]);break;
    default: break;}  }
void main(void)
{shift(ledk[5]);P2=0xfe; 
while(1)
     {key=get_char( );key_func(key);P2=mask&0xfe;}		   
 }