002_89C52_Proteus_DAC0832_输出50HZ,正弦波，三角波，矩形波，锯齿波

（一）非常感谢：89C51与ad0832 输出正弦波，三角波，矩形波，锯齿波

（二）在上面的情况下进行程序的修改，实现50HZ的输出

（三）电路图

（三）输出方波

（四）输出锯齿波

（五）输出三角波

（六）输出正玄波

（七）程序

#include 
#include 
 
#define DA0832 P2
#define DATA 57          //定时器延时 
 
#define uchar unsigned char
#define uint unsigned int
 
sbit S1 = P1^0;
sbit S2 = P1^1;
//00锯齿波；01方波；10三角波；11正弦波
 
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
};
 
void stair(void);//锯齿波 
void square(void);//方波 
void trian();//三角波 
void sin();//正弦波 
void scan();//扫描函数 
void Timer0Init(void);        //75微秒@11.0592MHz
uchar flag = 0;


void main()
{    
    P2 = 0xff;
    Timer0Init();
    while(1)
    {
    //逐个测试 
    //stair();        /*锯齿波*/
    //    square();  /*方波*/
  // trian();    /*三角波*/
    //    sin();  /*正弦波*/
    scan();
    }
}
 
void Timer0Init(void)        //75微秒@11.0592MHz
{

    TMOD = 0x01;        //设置定时器模式
    TH0  = (65536 - DATA) / 256;        //设置定时初值
    TL0  = (65536 - DATA) % 256;        //设置定时初值
    ET0  = 1;            //TF0标志
    TR0  = 1;            //定时器0开始计时
    EA   = 1;
}
void timer0_ISR(void) interrupt 1
{
    TH0  = (65536 - DATA) / 256;        //设置定时初值
    TL0  = (65536 - DATA) % 256;        //设置定时初值
    TR0  = 0;
    flag = 1;
}


void scan()
{
    if((0 == S1) &&(0 == S2))
        stair();
    else if((1 == S1) && (0 == S2))
        square();
    else if((0 == S1) && (1 == S2))
        trian();
    else
        sin();
        
}


void stair(void)
{
    uchar i;
    for(i = 0 ;i < 255; i++)
    {
      DA0832 = i;
        TR0  = 1;
        while(flag == 0);
        flag = 0;
    }
     
}
 
void square(void)
{
    int i;
    DA0832 = 0xff;
    for(i = 0;i < 125;i++)
    {
        TR0  = 1;
        while(flag == 0);
        flag = 0;        
    }
    DA0832 = 0x00;
    for(i = 0;i < 125;i++)
    {
        TR0  = 1;
        while(flag == 0);
        flag = 0;        
    }
}
 
void trian(void)
{
    uchar i;
    for(i = 0 ;i < 125; i++)
    {
        DA0832 = i;
            TR0  = 1;
          while(flag == 0);
          flag = 0;
    }
    
    for(i=125 ;i > 0; i--)
    {
        DA0832 = i;
          TR0  = 1;
          while(flag == 0);
          flag = 0;
    }
}
 
void sin()
{
    uchar i;
    for(i = 0; i < 255; i++)
    {
        DA0832 = sin_tab[i];
        TR0  = 1;
        while(flag == 0);
        flag = 0;        
    }
}

（八）工程源码下载

https://download.csdn.net/download/xiaoguoge11/10742925