51单片机Protues，通过ADC0832芯片产生正弦波三角波方波程序和仿真。

#include <reg51.h> sbit key1 = P3^2; sbit key2 = P3^3; sbit key3 = P3^4; unsigned int i; unsigned char sanjiao_flag=0,zhengxuan_flag=0,fangbo_flag=0; code unsigned char Sin[128]={ 64,67,70,73,76,79,82,85,88,91,94,96,99,102,104,106, 109,111,113,115,117,118,120,121,123,124,125,126,126, 127,127,127,127,127,127,127,126,126,125,124,123,121, 120,118,117,115,113,111,109,106,104,102,99,96,94,91, 88,85,82,79,76,73,70,67,64,60,57,54,51,48,45,42,39, 36,33,31,28,25,23,21,18,16,14,12,10,9,7,6,4,3,2,1, 1,0,0,0,0,0,0,0,1,1,2,3,4,6,7,9,10,12,14,16,18,21,23, 25,28,31,33,36,39,42,45,48,51,54,57,60}; code unsigned char fangbo[128]={ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,128,128,128,128,128,128,128,128, 128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128, 128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128, 128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128}; code unsigned char sanjiao[128]={ 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29, 30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56, 57,58,59,60,61,62,63,64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47, 46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20, 19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1}; main() { while(1) { i++; if(i==128) i=0; if(key1 == 0) { sanjiao_flag=1;zhengxuan_flag=0;fangbo_flag=0; } if(key2 == 0) { sanjiao_flag=0;zhengxuan_flag=1;fangbo_flag=0; } if(key3 == 0) {sanjiao_flag=0;zhengxuan_flag=0;fangbo_flag=1;} if(sanjiao_flag==1) P2=sanjiao[i]; if(zhengxuan_flag==1) P2=Sin[i]; if(fangbo_flag==1) P2=fangbo[i]; } }