ledkey.c

数码管驱动芯片PT6961与51单片机的接口程序

#include<reg51.h>
#include<stdio.h>
#include<stdlib.h>
#include<absacc.h>
#include<string.h>

#define unchar unsigned char
#define unint unsigned int
#define unlong unsigned long

sbit stb=P2^5;
sbit dout=P2^2;
sbit din=P2^3;
sbit clk=P2^4;
sbit led_clk=P2^0;
unchar cmd,ii;
unchar shownum[6];
unchar outnum;

void delay(unchar temp);
void send(cmd);	//向sm1623送指令
void disp();   //显示shownum[i]的值
unchar getkey(); //返回键扫寄存器的值
unchar returnnum();//返回对应按键的值
void delay2(unchar temp);

 main(void){
 unchar keynum;
 start:	for(ii=0;ii<6;ii++) shownum[ii]=1;	//6个shownum[]对应6个led
     disp();	//显示111111
	 keynum=returnnum(); //获取按下的键的值
	//根据不同键值执行不同功能
	 switch(keynum){  
	 case 0x00:
	 P0=0xff;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x01:
	 P0=0xfe;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x02:
	 P0=0xfd;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x03:
	 P0=0xfb;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x04:
	 P0=0xf7;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x05:
	 P0=0xef;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x06:
	 P0=0xdf;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x07:
	 P0=0xbf;
	 led_clk=0;
	 led_clk=1;
	 delay2(0x0f);
	 break;
	 case 0x08:
	 P0=0x7f;
	 led_clk=0;
	 led_clk=1;
	 delay(0xff);
	 break;
   	 }
	 
goto start;	
	
       
}

void send(cmd){	  //送指令
int counter;
unchar cmd_temp;

for(counter=0;counter<=7;counter++){
clk=0;
delay(0x0f);
cmd_temp=cmd&0x01;
if(cmd_temp==0)   din=0;
else  din=1;

clk=1;
delay(0x0f);
cmd=cmd>>1;

}

}


void disp(){	//显示数字，送入要显示数字的十进制形式
int i;
unchar code_dis_d[6];
 	for(i=0;i<6;i++)//计算显示码
	{
		switch(shownum[i])
		{
			case 1:
				code_dis_d[i]=0x06;
				break;
			case 2:
				code_dis_d[i]=0x5b;
				break;
			case 3:
				code_dis_d[i]=0x4f;
				break;
			case 4:
				code_dis_d[i]=0x66;
				break;
			case 5:
				code_dis_d[i]=0x6d;
				break;
			case 6:
				code_dis_d[i]=0x7d;
				break;
			case 7:
				code_dis_d[i]=0x07;
				break;
			case 8:
				code_dis_d[i]=0x7f;
				break;
			case 9:
				code_dis_d[i]=0x6f;
				break;
			case 10://显示黑
				code_dis_d[i]=0x00;
				break;
			case 11://显示A
				code_dis_d[i]=0x77;
				break;
			case 12://显示d
				code_dis_d[i]=0x5e;
				break;
			case 13://显示-
				code_dis_d[i]=0x40;
				break;
			case 14://显示8.
				code_dis_d[i]=0xff;
				break;
			default://显示0
				code_dis_d[i]=0x3f;
				break;
		}
	}
  stb=0;
  send(0x02);
  stb=1;
  delay(0x0f);

  stb=0;
  send(0x40);
  stb=1;
  delay(0x0f);

  
  stb=0;
  send(0xc0);

//向显示寄存器中送显示数
  send(code_dis_d[0]);//1
	send(0x00);
	send(code_dis_d[1]);//2
	send(0x00);
	send(code_dis_d[2]);//3
	send(0x00);
	send(code_dis_d[3]);//4
	send(0x00);
	send(code_dis_d[4]);//5
	send(0x00);
	send(code_dis_d[5]);//6
	send(0x00);
//送完显示数

  stb=1;
  delay(0x0f);

  stb=0;
  send(0x8f);
  stb=1;
  delay(0x0f);
}


unchar getkey(){
unchar out_temp;
int c1;
out_temp=0;
delay(0x20);
for(c1=0;c1<=7;c1++){
clk=0;
delay(0x02);
if(dout==0) {out_temp=out_temp&0x7f;}
		else {out_temp=out_temp|0x80;}
		outnum=out_temp;
out_temp=out_temp>>1;
clk=1;
delay(0x02);
}
outnum=outnum&0x1b ;
return outnum;
}

unchar returnnum(){

unchar temp1,temp2;
stb=0;
send(0x42);
	 temp1=getkey();//读键扫寄存器
	 temp2=getkey();
	 stb=1;
	 if(temp1!=0x00)
	 switch(temp1)
	 {
	 case 0x01:
	 return 0x01;
	 break;
	 case 0x02:
	 return 0x02;
	 break;
	 case 0x08:
	 return 0x03;
	 break;
	 case 0x10:
	 return 0x04;
	 break;
	 default:
	 return 0x00;
	 break;
	 }
	 if(temp2!=0x00)
	 switch(temp2){
	 		case 0x01:
				return 0x05;
				break;
			case 0x02:
				return 0x06;
				break;
			case 0x08:
				return 0x07;
				break;
			case 0x10:
				return 0x08;
				break;
			default:
				return 0x00;
				break;
	 } 
return 0x00;	  
}

void delay(unchar temp) {
int s1;
for( s1=0;s1<=temp;s1++){

}

}
void delay2(unchar temp) {
int i;
unint j;
for( i=0;i<=temp;i++){
for( j=0;j<=500;j++)
{
}
}
}