單片機四路低頻方波脈沖輸出，可調脈寬帶仿真和源程序

ID:145237 · 發表于 2016-10-30 18:45

歷時一周，做的四路低頻方波脈沖輸出，可調脈寬。
附件包括c程序以及Proteus仿真
原創，多多指教，謝謝

下面是proteus仿真原理圖：

51單片機源程序：

#include <REG52.H>
#define uchar unsigned char
#define uint unsigned int
sbit LEVEL00=P1^0;//LEVEL,P1.2引腳上的電平值
sbit LEVEL01=P1^1;//LEVEL,P1.2引腳上的電平值
sbit LEVEL02=P1^2;//LEVEL,P1.2引腳上的電平值
sbit LEVEL03=P1^3;//LEVEL,P1.2引腳上的電平值
sbit P14=P1^4;//LEVEL,P1.2引腳上的電平值
sbit P15=P1^5;//LEVEL,P1.2引腳上的電平值
uchar highcount00,highcount01,highcount02,highcount03; //記錄高電平定時次數
const uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,}; /*顯示0～9*/
uint x,y,z,m;
uint n0,n1;
uint count;
void delay()
{
uint i,j;
for(i=0;i<256;i++);
for(j=0;j<256;j++);
}
void stop(void) interrupt 0 using 1
{
TR0=!TR0;
if(TR0==1)
{x=x+10;y=y+10;z=z+10;m=m+10;count=count+5;
if(count==95){x=0;y=0;z=0;m=0;count=0;}}
}
void sto(void) interrupt 2 using 3
{
if(TR0==1)
{x=x-10;y=y-10;z=z-10;m=m-10;count=count-5;
if(count<=0){x=0;y=0;z=0;m=0;count=0;}}
}
void timer0isr(void) interrupt 1 using 2
{
TH0 = 0xD8;
TL0 = 0xF0; //重置計數初值
highcount00++; //溢出次數加1
if(highcount00== x)
LEVEL00 = 0;
if(highcount00== 200)
{
LEVEL00 = 1;
highcount00 = 0;
}
highcount01++; //溢出次數加1
if(highcount01== y)
LEVEL01 = 0;
if(highcount01== 200)
{
LEVEL01 = 1;
highcount01 = 0;
}
highcount02++; //溢出次數加1
if(highcount02== z)
LEVEL02 = 0;
if(highcount02== 200)
{
LEVEL02 = 1;
highcount02 = 0;
}
highcount03++; //溢出次數加1
if(highcount03== m)
LEVEL03 = 0;
if(highcount03== 200)
{
LEVEL03 = 1;
highcount03 = 0;
}
}
void main(void)
{
x=10;y=20;z=30;m=40;
count=5;
IT0=1;
IT1=1;
EX1=1;
EX0=1;
highcount00 = 0; //記錄高電平定時次數
highcount01 = 0;
highcount02 = 0;
highcount03 = 0;
TMOD = 0x01; //設定T/C0工作在定時器方式1
LEVEL00 = 1; //初始電平為高
LEVEL01 = 1; //初始電平為高
LEVEL02 = 1; //初始電平為高
LEVEL03 = 1; //初始電平為高
TH0 = 0xD8;
TL0 = 0xF0; //裝載計數初值
EA = 1; //開總中斷
ET0 = 1; //開T/C0中斷
TR0 = 1; //啟動T/C0
while(1)
{n0=count/10;
n1=count%10;
P2=tab[n0];
P14=1;
delay();
P14=0;
P2=tab[n1];
P15=1;
delay();
P15=0;
}
}