基于51单片机的波形发生器（4种，振幅，频率，相差）
双通道信号发生器
1、可通过串口设置波形灯参数
2、输出正弦波、方波、三角波或锯齿波
3、波的类型、振幅、频率可调
4、波的相位差可调
#include<reg51.h>
#include"absacc.h"
#include"intrins.h"
#include "lcd1602.h"
#include "ad5601.h"
#define uchar unsigned char
#define uint unsigned int
#define out XBYTE[0xfeff]
sbit k1=P2^3;//按钮
sbit k2=P2^4;
sbit k3=P2^5;
sbit k4=P2^6;
sbit k5=P2^7;
uchar boxing=0;//波形。正弦、三角、锯齿 、方波
uint bu=0,step=1;//步进数
uint freq=100; //频率
uint amp1=255,amp2=255;//振幅
uint xiang=64;//相位
uchar time=0;//计时
//波形Triangle wave.sine wave.sine wave
uchar two[]="F:0000Hz P:000 ";//频率+相位
uchar one[]="1:0.00V 2:0.00V";//振幅
uchar code zhengx[]={//正弦编码
128,131,134,137,141,144,147,150,153,156,159,162,165,168,171,174,177,180,183,186,188,191,194,
196,199,202,204,207,209,212,214,216,219,221,223,225,227,229,231,233,234,236,238,239,241,242,244,245,246,247,249,
250,250,251,252,253,254,254,255,255,255,255,255,255,255,255,255,255,255,255,255,254,254,253,252,251,250,250,249,247,
246,245,244,242,241,239,238,236,234,233,231,229,227,225,223,221,219,216,214,212,209,207,204,202,199,196,194,191,
188,186,183,180,177,174,171,168,165,162,159,156,153,150,147,144,141,137,134,131,128,125,122,119,115,112,109,106,
103,100,97,94,91,88,85,82,79,76,73,70,68,65,62,60,57,54,52,49,47,44,42,40,37,35,33,31,29,27,25,23,22,20,18,17,15,
14,12,11,10,9,7,6,6,5,4,3,2,2,1,1,1,1,0,0,0,0,0,0,1,1,1,2,2,3,4,5,6,6,7,9,10,11,12,14,15,17,18,20,22,23,25,27,29,
31,33,35,37,40,42,44,47,49,52,54,57,60,62,65,68,70,73,76,79,82,85,88,91,94,97,100,103,106,109,112,115,119,122,
125,128,128,128};
void disp()//显示
{
two[2]=freq/3/1000+0x30; //频率
two[3]=freq/3%1000/100+0x30;
two[4]=freq/3%100/10+0x30;
two[5]=freq/3%10+0x30;
two[12]=(xiang*72/51)/100+0x30;
two[13]=(xiang*72/51)%100/10+0x30;
two[14]=(xiang*72/51)%10+0x30;
one[2]=(amp1/51)+0x30;//振幅
one[4]=(amp1*100/51)%100/10+0x30;
one[5]=(amp1*100/51)%10+0x30;
one[11]=(amp2/51)+0x30;//振幅
one[13]=(amp2*100/51)%100/10+0x30;
one[14]=(amp2*100/51)%10+0x30;
write_string(2,0,two);
write_string(1,0,one);
}
uchar key_scan()//按键检测
{
uchar i,j;
i=0;
j=0;
P1=0x0f;
if(P1!=0x0f) //检测有无按下
{
switch(P1)//检测行
{
case 0x0e:i=1;break;
case 0x0d:i=5;break;
case 0x0b:i=9;break;
case 0x07:i=13;
}
P1=0xf0;
switch(P1)//检测列
{
case 0xe0:j=0;break;
case 0xd0:j=1;break;
case 0xb0:j=2;break;
case 0x70:j=3;
}
while(P1!=0xf0);//等待按键松开
}
return i+j;
}
void main()
{
uchar i;
ad5601_init();
two[15]=0xdf;
SCON=0X50; //设置为工作方式1
TMOD=0X22; //设置计数器工作方式2
TH1=0XFD;
TL1=0XFD;
ES=1; //打开接收中断
TR1=1; //打开计数器
//设置定时器
TH0=156;//给定时器赋初值
TL0=156;
ET0=1;//打开定时器0中断允许
TR0=0;//打开定时器
EA=1;//打开总中断
init_1602();//初始化LCD
disp();
step=64*freq/5;//计算步进数
while(1)
{
i=key_scan();
if(i==1)//波形切换
{
if(boxing<3)
boxing++;
else
boxing=0;
}
if(i==9)//频率加
{
freq+=2;
step=64*freq/5;//计算步进数
disp();
}
if(i==13)//频率减
{
freq-=2;
step=64*freq/5;//计算步进数
disp();
}
if(i==2)//振幅加
{
if(255-amp1>10)
amp1+=10;
disp();
}
if(i==3)//振幅减
{
if(amp1>0)
amp1-=10;
disp();
}
if(i==6)//振幅加
{
if(255-amp2>10)
amp2+=10;
disp();
}
if(i==7)//振幅减
{
if(amp2>0)
amp2-=10;
disp();
}
if(i==10)//相位加
{
if(xiang<255)
xiang++;
disp();
}
if(i==14)//相位减
{
if(xiang>0)
xiang--;
disp();
}
}
}
void Timer0() interrupt 1//定时器中断
{
uint i;
uchar num=0;
TR0=0;
bu+=step;
if(bu>25500)
bu=0;
time=bu/100;
if(boxing==0)//正弦波
{
i=zhengx[time]*amp1;
i=i/255;
ad5601_send(i<<6);
}
if(boxing==1)//三角波
{
if(time<128)
{
i=time*amp1;
i=i/255;
ad5601_send(i<<6);
}
else
{
i=(255-time)*amp1;
i=i/255;
ad5601_send(i<<6);
}
}
if(boxing==2)//锯齿波
{
i=time*amp1;
i=i/255;
ad5601_send(i<<6);
}
if(boxing==3)//方波
{
if(time<128)
ad5601_send(amp1<<6);
else
ad5601_send(0);
}
//==============================
num=time+xiang;
if(boxing==0)//正弦波
{
i=zhengx[num]*amp2;
i=i/255;
ad5601_send1(i<<6);
}
if(boxing==1)//三角波
{
if(num<128)
{
i=num*amp2;
i=i/255;
ad5601_send1(i<<6);
}
else
{
i=(255-num)*amp2;
i=i/255;
ad5601_send1(i<<6);
}
}
if(boxing==2)//锯齿波
{
i=num*amp2;
i=i/255;
ad5601_send1(i<<6);
}
if(boxing==3)//方波
{
if(num<128)
ad5601_send1(amp2<<6);
else
ad5601_send1(0);
}
TR0=1;
}
//串口中断
void Usart() interrupt 4
{
uchar i;
i=SBUF;//出去接收到的数据
RI = 0;//清除接收中断标志位
if(i=='Q')//波形切换
{
if(boxing<3)
boxing++;
else
boxing=0;
}
if(i=='W')//频率加
{
freq+=2;
step=64*freq/5;//计算步进数
disp();
}
if(i=='E')//频率减
{
freq-=2;
step=64*freq/5;//计算步进数
disp();
}
if(i=='R')//振幅加
{
if(255-amp1>10)
amp1+=10;
disp();
}
if(i=='T')//振幅减
{
if(amp1>0)
amp1-=10;
disp();
}
if(i=='A')//振幅加
{
if(255-amp2>10)
amp2+=10;
disp();
}
if(i=='S')//振幅减
{
if(amp2>0)
amp2-=10;
disp();
}
if(i=='D')//相位加
{
if(xiang<255)
xiang++;
disp();
}
if(i=='F')//相位减
{
if(xiang>0)
xiang--;
disp();
}
}