用proteus画的模拟仿真示波器

#include <absacc.h> #include <reg52.h> /***********????********************************/ #define out P1 #define out1 P0 sbit dac_cs=P2^0; sbit dac_wr=P2^1; sbit dac_by=P2^2; sbit dac_w2=P2^3; #define uchar unsigned char #define uint unsigned int sbit S1 = P0^6; sbit S2 = P0^7; //00???;01??;10???;11??? unsigned int out_temp; uchar code sin_tab[] = //?????? { 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 t);// delay void stair(uint AMP);//??? void square(uint AMP, uchar THL,uchar TLL);//?? void trian(uint AMP);//??? void sin();//??? void scan();//???? void main() { while(1) { //???? //stair(200); //square(200,10,10); //trian(200); //sin(); scan();//开关扫描 } } void scan() { if((0 == S1) &&(0 == S2)) stair(3000);//三角形 参数为 电压幅度 else if((1 == S1) && (0 == S2)) square(3000,20,20);//方波 参数为 幅度 高电平时间 低电时间 else if((0 == S1) && (1 == S2)) trian(3000);//梯形 参数为 电压幅度 else sin(); } void Delay_MS(uint n) { uint k; for(n; n >0 ;n--) for(k = 10; k > 0 ;k--); } void stair(uint AMP)//三角形 { uint i; for(i = AMP ;i >0; i--) { dac_by=1; //12位数据模式 out=i; //低8位 out1&=0xf0;//高4位 out1|=i/256; dac_cs=0; dac_wr=0; dac_cs=1; dac_wr=1; } } void square(uint AMP, uchar THL, uchar TLL)//方波 { dac_by=1; out=4095-AMP; out1&=0xf0; out1|=(4095-AMP)/256; dac_cs=0; dac_wr=0; dac_cs=1; Delay_MS(THL);//低电平时间 out=255; out1&=0xf0; out1|=0x0f; dac_cs=0; dac_wr=0; dac_cs=1; dac_wr=1; Delay_MS(TLL);//高电平时间 } void trian(uint AMP)//梯形 { uint i; for(i = 4095 - AMP ;i < 4095; i++) { dac_by=1; out=i; out1&=0xf0; out1|=i/256; dac_cs=0; dac_wr=0; dac_cs=1; dac_wr=1; } for(i-1 ;i>4095 - AMP; i--) { dac_by=0; out=i; out1&=0xf0; out1|=i/256; dac_cs=0; dac_wr=0; dac_cs=1; dac_wr=1; } } void sin() { uchar i; for(i = 0; i < 255; i++) { dac_by=1; out=sin_tab[i]; out_temp=(uint)sin_tab[i]*15;//放大15倍 变成12位的数据 out=out_temp;//低8位 out1&=0xf0;//高4位 out1|=out_temp/256; dac_cs=0; dac_wr=0; dac_cs=1; } }