89C51与ad0832 输出正弦波，三角波，矩形波，锯齿波

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proteus仿真电路图
c语言程序
#include <absacc.h>#include <reg52.h>#define DA0832 XBYTE[0xfffe]#define uchar unsigned char#define uint unsigned intsbit 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 Delay_MS(uint);// delay void stair(uchar AMP);//锯齿波 void square(uchar AMP, uchar THL,uchar TLL);//方波 void trian(uchar AMP);//三角波 void sin();//正弦波 void scan();//扫描函数 void main(){while(1){//逐个测试 //stair(200);//square(200,10,10);        //trian(200);//sin();        scan();}}void scan(){if((0 == S1) &&(0 == S2))    stair(200);else if((1 == S1) && (0 == S2))square(200,10,10);else if((0 == S1) && (1 == S2))trian(200);elsesin();}void Delay_MS(uint n){uint k;for(n; n  >0 ;n--)for(k = 10; k > 0 ;k--);}void stair(uchar AMP){uchar i;for(i = 0 ;i < 255; i++){    DA0832 = i;} }void square(uchar AMP, uchar THL, uchar TLL){DA0832 = 255 - AMP;Delay_MS(THL);DA0832 = 255;Delay_MS(TLL);}void trian(uchar AMP){uchar i;for(i = 255 - AMP ;i < 255; i++){    DA0832 = i;}for(i-1 ;i > 255 - AMP; i--){    DA0832 = i;}}void sin(){uchar i;for(i = 0; i < 255; i++){DA0832 = sin_tab[i];}}
输出波形
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