信号发生器|基于51单片机的信号发生器 proteus|51单片机|频率|DAC0832

目录
一、项目功能
二、仿真
三、程序

资料下载地址：基于51单片机的信号发生器
一、项目功能 1. 输出矩形波、梯形波、三角波、锯齿波、正弦波五种波形；
2. 每种波形的频率可更改；
3. 采用lcd12864中文显示屏显示波形和相关信息；
二、仿真
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正弦波

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三角波

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方波

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锯齿波

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三、程序

#include #include #include #include #define DAC_OUT P2sbit change_wave=P3^2; //改变波形按键 sbit change_rate=P3^3; //改变频率按键 uchar mode=0,rate=0,delay_time=0,k,p; //为波形发生模块提供中间变量 uchar *which_wave,*which_wave2; uint rate_num; uchar code Sine_wave[64]=//DA输出对应电压值对应的数字量，正弦波 { 128,114,102,90,78,66,55,45,36,28,20,14,9,5,2,1,1,1, 3,7,11,17,24,32,41,50,61,72,84,96,108,121,133,146, 158,170,182,193,204,213,222,230,237,243,247,251,253, 254,254,252,249,245,240,234,226,218,209,199,188,176, 167,158,145,135 }; uchar code Sawtooth_Wave[64]=//锯齿波 { 255,251,247,243,239,235,231,227,223,219,215,210,206,202, 198,194,190,186,182,178,174,170,166,162,158,154,150,146, 142,138,134,130,125,121,117,113,109,105,101,97,93,89,85, 81,77,73,69,61,57,53,49,45,40,36,32,28,24,20,16,12,8,4,0 }; uchar code Square_wave[64]=//方波 { 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, 0,0,0,0,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255, 255,255,255,255,255,255, }; uchar code Triangular_Wave[64]=//三角波 { 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 }; void wave_delay()//波形延时函数 { int a,b; for(a=1; a>0; a--) for(b=122; b>0; b--); }void wave_init()//波形发生模块的初始化（外部中断0、1） { EA=1; IT0=1; //下降沿触发 EX0=1; IT1=1; EX1=1; }void disp_wave(uchar *wave)//显示波形函数 { uchar page,i; uint date; select(1); //选择左屏 for(i=32; i<64; i++) { page=7-(wave[i]/4)/8; date=7-(wave[i]/4)%8; date=pow(2,date); setpos(page,i); //选择行列 lcd_wdat(date); } select(2); //选择右屏 for(i=0; i<64; i++) { page=7-(wave[i]/4)/8; date=7-(wave[i]/4)%8; date=pow(2,date); setpos(page,i); //选择行列 lcd_wdat(date); } }void main() {lcd_init(); clr_screen(); which_wave=&Sine_wave[0]; disp_chinese(); disp_function(chinese_sine); disp_rate(400); disp_xy(); disp_wave(which_wave); wave_init(); while(1) { delay_time=rate; //rate=0时，12mhz下，为400hz的波形。循环一次的时间为0.00025ms DAC_OUT=*(which_wave+k); k++; if(k==64) k=0; while(delay_time) delay_time--; } }void int0() interrupt 0//波形选择中断服务程序 { EX0=0; wave_delay(); mode++; if(mode==4) mode=0; switch(mode) { case 0 ://显示正弦波 which_wave=&Sine_wave[0]; which_wave2=&chinese_sine[0]; break; case 1 ://显示三角波 which_wave=&Triangular_Wave[0]; which_wave2=&chinese_triangular[0]; break; case 2 ://显示方波 which_wave=&Square_wave[0]; which_wave2=&chinese_square[0]; break; case 3 ://显示锯齿波 which_wave=&Sawtooth_Wave[0]; which_wave2=&chinese_sawtooth[0]; break; } wave_delay(); clr_screen(); disp_chinese(); disp_rate(400/rate); disp_function(which_wave2); disp_xy(); disp_wave(which_wave); while(!change_wave); EX0=1; }

【信号发生器|基于51单片机的信号发生器】