51单片机+PCF8591的波形发生器仿真(正弦波三角波等可调)

基于51单片机的波形发生器仿真

原创于 2025-12-05 19:35:31 发布 · 258 阅读

5 ·

CC 4.0 BY-SA版权

文章标签：

#51单片机 #嵌入式硬件 #单片机 #keil #proteus

✅文末提供代码和仿真文件。

仿真时，首先点击-选择波形，如果看不到波形显示在模拟示波器上，可以将鼠标移动到显示屏幕区域内，滚动鼠标滚轮来调节，电压幅值。

在这里插入图片描述

主程序

/*-------------------------------
51单片机+PCF8591的多波形发生器(正弦波 三角波等可调)
--------------------------------*/
#include <reg52.h>
#include "wave.h"
#include "keyscan.h"
#include "PCF8591.h"
#include "delay.h"

#define uchar unsigned char
#define uint unsigned int

uchar  code sin_tab[] =        //正弦波输出表
{
    0x80,0x83,0x86,0x89,0x8D,0x90,0x93,0x96,0x99,0x9C,0x9F,0xA2,0xA5,0xA8,0xAB,0xAE,
    0xB1,0xB4,0xB7,0xBA,0xBC,0xBF,0xC2,0xC5,0xC7,0xCA,0xCC,0xCF,0xD1,0xD4,0xD6,0xD8,
    0xDA,0xDD,0xDF,0xE1,0xE3,0xE5,0xE7,0xE9,0xEA,0xEC,0xEE,0xEF,0xF1,0xF2,0xF4,0xF5,
    0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFD,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFD,0xFD,0xFC,0xFB,0xFA,0xF9,0xF8,0xF7,0xF6,
    0xF5,0xF4,0xF2,0xF1,0xEF,0xEE,0xEC,0xEA,0xE9,0xE7,0xE5,0xE3,0xE1,0xDF,0xDD,0xDA,
    0xD8,0xD6,0xD4,0xD1,0xCF,0xCC,0xCA,0xC7,0xC5,0xC2,0xBF,0xBC,0xBA,0xB7,0xB4,0xB1,
    0xAE,0xAB,0xA8,0xA5,0xA2,0x9F,0x9C,0x99,0x96,0x93,0x90,0x8D,0x89,0x86,0x83,0x80,
    0x80,0x7C,0x79,0x76,0x72,0x6F,0x6C,0x69,0x66,0x63,0x60,0x5D,0x5A,0x57,0x55,0x51,
    0x4E,0x4C,0x48,0x45,0x43,0x40,0x3D,0x3A,0x38,0x35,0x33,0x30,0x2E,0x2B,0x29,0x27,
    0x25,0x22,0x20,0x1E,0x1C,0x1A,0x18,0x16,0x15,0x13,0x11,0x10,0x0E,0x0D,0x0B,0x0A,
    0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
    0x0A,0x0B,0x0D,0x0E,0x10,0x11,0x13,0x15,0x16,0x18,0x1A,0x1C,0x1E,0x20,0x22,0x25,
    0x27,0x29,0x2B,0x2E,0x30,0x33,0x35,0x38,0x3A,0x3D,0x40,0x43,0x45,0x48,0x4C,0x4E,
    0x51,0x55,0x57,0x5A,0x5D,0x60,0x63,0x66,0x69,0x6C,0x6F,0x72,0x76,0x79,0x7C,0x7E
};

extern uchar flag,time1;

void sin(void)	 //正弦波
{
    uint i;
    for(i=0; i<256; i++)
    {
        write_add(0x40,sin_tab[i]);	  //data byte
        //check_ACK();                  //检查应答位
        delay_1ms(time1);
    }
}

void main()
{
    uchar wave_select=0;
    init();
    while(1)
    {
        keyscan();
        if(Key5==0)
        {
            wave_select++;
            while(!Key5);
            if(wave_select==4)
            {
                wave_select=1;
            }
        }
        if(wave_select==1)
            triangular();
        if(wave_select==2)
            square();
        if(wave_select==3)
            sin();
    }

}