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【51单片机】【protues仿真】基于51单片机波形发生器系统

news 2025/11/3 10:12:13

一、主要功能

二、使用步骤

三、硬件资源

四、软件设计

五、实验现象

一、主要功能

1、LCD1602液晶显示波形、频率
2、按键切换波形和频率、步进值
3、频率范围10hz-100hz，步进值0-10
4、正弦波、方波、三角波、锯齿波

二、使用步骤

本设计以51单片机为核心，通过DAC0832数模转换器和LM358运算放大器实现正弦波、方波、三角波、锯齿波等波形的生成与输出。支持波形选择、频率调节、幅度调节及失真校正功能，并通过LCD1602显示屏实时显示波形参数‌。

三、硬件资源

1、51单片机核心模块
2、按键模块
3、数模转换芯片
4、运算放大器芯片
5、LED指示灯模块
6、LCD1602显示模块

四、软件设计

#include<reg52.h> //包含头文件
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int

sbit s1=P3^5;
sbit s2=P3^6;
sbit s3=P3^7;
sbit s4=P3^4;

sbit led0=P3^0;
sbit led1=P3^1;
sbit led2=P3^2;
sbit led3=P3^3;

sbit lcdrs=P2^7;
sbit lcden=P2^6;

char num,boxing,u;
int pinlv=100,bujin=10,bujin1=1;
uchar code table[]="0123456789";
uchar code table1[]="Fout= Wave form:";
unsigned long int m;
int a,b,h,num1;

//自定义字符
uchar code zifu[]={
0x0e,0x11,0x11,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x11,0x11,0x0e,0x00, //正弦波 0 1

0x00,0x07,0x04,0x04,0x04,0x04,0x1c,0x00,
0x00,0x1c,0x04,0x04,0x04,0x04,0x07,0x00, //矩形波 2 3

0x00,0x01,0x02,0x04,0x08,0x10,0x00,0x00,
0x00,0x10,0x08,0x04,0x02,0x01,0x00,0x00, //三角波 4 5

                       0x00,0x01,0x03,0x05,0x09,0x11,0x00,0x00,     //锯齿波   6
};
uchar code sin[64]={
135,145,158,167,176,188,199,209,218,226,234,240,245,249,252,254,254,253,251,247,243,237,230,222,213,204,193,182,170,158,
146,133,121,108,96,84,72,61,50,41,32,24,17,11,7,3,1,0,0,2,5,9,14,20,28,36,45,55,66,78,90,102,114,128
};                   //正弦波取码
uchar code juxing[64]={
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};                   //矩形波取码

uchar code sanjiao[64]={
0,8,16,24,32,40,48,56,64,72,80,88,96,104,112,120,128,136,144,152,160,168,176,184,192,200,208,216,224,232,240,248,
248,240,232,224,216,208,200,192,184,176,168,160,152,144,136,128,120,112,104,96,88,80,72,64,56,48,40,32,24,16,8,0
}; //三角波取码
uchar code juchi[64]={
0,4,8,12,16,20,24,28,32,36,40,45,49,53,57,61,65,69,73,77,81,85,89,93,97,101,105,109,113,117,121,125,130,134,138,142,
146,150,154,158,162,166,170,174,178,182,186,190,194,198,202,206,210,215,219,223,227,231,235,239,243,247,251,255
}; //锯齿波取码

void delay(uint xms)   //延时函数
{
   int a,b;
   for(a=xms;a>0;a--)
       for(b=110;b>0;b--);
}
void write_com(uchar com)       //写命令函数
{
   lcdrs=0;
   P0=com;
   delay(1);
   lcden=1;
   delay(1);
   lcden=0;
}

void write_date(uchar date)       //写数据函数
{
   lcdrs=1;
   P0=date;
   delay(1);
   lcden=1;
   delay(1);
   lcden=0;
}

//自定义字符集
void Lcd_ram()
{
   uint i,j,k=0,temp=0x40;
   for(i=0;i<7;i++)
   {
   for(j=0;j<8;j++)
   {
   write_com(temp+j);
   write_date(zifu[k]);
   k++;
   }
   temp=temp+8;
   }
}

void main()                   //主函数
{
   init_lcd();
   m=65536-(150000/pinlv);
   a=m/256;
   b=m%256;
   initclock();
   led0=0;
   while(1)
   {
       if(h==0)
       {
           keyscan();
       }

       bujinjiance();

       switch(boxing)
       {
           case 0 : P1=sin[u]; break;
           case 1 : P1=juxing[u]; break;
           case 2 : P1=sanjiao[u]; break;
           case 3 : P1=juchi[u]; break;
       }
   }
}