产生10Hz--1KHz方波的单片机程序

#include

#include

//#include

#include"stdio.h"

#define uchar unsigned char

#define uint unsigned int

sbit p20=P2^0;

sbit wela = P2^7;

sbit dula = P2^6;

uchar code table[]={

0x3f,0x06,0x5b,0x4f,

0x66,0x6d,0x7d,0x07,

0x7f,0x6f,0x77,0x7c,

0x39,0x5e,0x79,0x71,0};

uchar bdata flag; // sbit flag1=flag^0; // sbit flag2=flag^1; //

uchar i=0,select;

uchar TH1_TMP,TL1_TMP;

uchar HZ[4]={0,0,0,0};

uchar temp0,temp1=17,N=0,control,count=0; uint hz1=0,b=17;

void display();

void init();

void main()

{

init();

select=0;

// TR1=1;

while(1)

{

switch(temp1)

{

case 0xee:b=1;break;

case 0xde:b=2;break;

case 0xbe:b=3;break;

case 0x7e:b=4;break;

case 0xed:b=5;break;

case 0xdd:b=6;break;

case 0xbd:b=7;break;

case 0x7d:b=8;break;

case 0xeb:b=9;break;

case 0xdb:b=0;break; //原为s10，此处代表数字0

case 0x7b:b=12;break; //s11为确认键

default:break;

}

if(b!=17) //判断有键按下

{

temp1=17;

N=N+1; //判断共有几次键按下

if(b==12) //确认键按下

{

if(hz1<=1000&&hz1>=10) //输入的方波频率在10hz~1k hz范围内

{

TH1=(65536-(500*(1000/hz1)))/256;

TL1=(65536-(500*(1000/hz1)))%256;

TH1_TMP=TH1;

TL1_TMP=TL1;

// TH1=(65536-1000)/256;

// TL1=(65536-1000)%256;

TR1=1;

N=0;

}

else

{

//输入频率超出范围即大于1K HZ或者小于10HZ ，则无效，均清0

hz1=0;

N=0;

b=17;

HZ[3]=0;

HZ[2]=0;

HZ[1]=0;

HZ[0]=0;

}

}

else

{

if(N==1)

{

HZ[3]=0;

HZ[2]=0;

HZ[1]=0;

HZ[0]=b;

hz1=b;

} else

if(N<=4)

{

hz1=hz1*10+b;

HZ[3]=HZ[2];

HZ[2]=HZ[1];

HZ[1]=HZ[0];

HZ[0]=b;

}

}

b=17;

}

}

}

////////////////////////////////////////////////////////////////////////////

////////////////////////// /////////////////////////////////////////////////////

void init()

{

P3=0x0f;

TMOD=0x01|0x10;

EA=1;

ET1=1;

ET0=1;

TH0=(65536-10000)/256;

TL0=(65536-10000)%256;

TR0=1;

// TH1=(65536-1000)/256;

// TL1=(65536-1000)%256;

// TR1=1;

}

/////////////////////////////////////////////////////////////////////////////////////////

void timer0() interrupt 1 //定时器0 {

count=count+1;

TH0=(65536-5000)/256;

TL0=(65536-5000)%256;

if(count==10)

{

if(flag1==0)

{

if(P3!=0x0f)

{

temp0=P3;

flag1=1;

P3=0xf0;

}

}

else

{

if(P3!=0xf0)

{

temp1=temp0|P3;

}

flag1=0;

P3=0x0f;

}

count=0;

}

P0=0XFF;

wela=1;

P0 = ~( 1<<(5-select) );

wela=0;

dula=1;

P0=table[HZ[select]];

dula=0;

select++;

if(select==4)

select=0;

}

/////////////////////////////////////////////////////////////////

void timer1() interrupt 3 //定时器1 {

// hz1=100;

// select=1;

// hz1=120;

TH1=TH1_TMP;

TL1=TL1_TMP;

// TH1=(65536-1000)/256;

// TL1=(65536-1000)%256;

p20=~p20;

}