51单片机实现三角函数运算.docxVIP

#includereg52.h#define uchar unsigned char#define uint unsigned int#define DtoHD 0.017453292519943295sbit lcden=P3^4;sbit lcdrs=P3^5;sbit dula=P2^6;sbit wela=P2^7;sbit key2=P3^5;sbit key3=P3^6;sbit key4=P3^7;uint h;uchar temp,key,s=0;uchar input[9];double b=0.0,c=0.0,d=0.0,a=0.0;uchar code table[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x2b,0x2d,0x2a,0x2f,0x24,0x3d,0x21,};uchar code tabl[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x73,0x69,0x6e,0x63,0x6f,0x73,0x74,0x61,0x6e,0x2e,};double sin(float x);double jishux(char x,double y);void tan();void delayms(uint xms){uint i,j;for(i=xms;i0;i--) //i=xms即延时约xms毫秒for(j=110;j0;j--);}void write_com(uchar com){ lcdrs=0; P0=com; delayms(5); lcden=1; delayms(5); lcden=0;} void write_data(uchar date){ lcdrs=1; P0=table[date]; delayms(5); lcden=1; delayms(5); lcden=0; if(key==14){write_com(0x01);a=0;b=0;c=0;write_com(0x83); }} void write_dat(uchar dalt){ lcdrs=1; P0=tabl[dalt]; delayms(5); lcden=1; delayms(5); lcden=0;// if(key==12)// {//write_com(0x01);//write_com(0x83);//// }}void init( ){ a=0;dula=0;wela=0;lcden=0;write_com(0x38);write_com(0x0f);write_com(0x06);write_com(0x01);}double sin(float x) //计算sinx的值{char i;char j=-1;double res=0.0;for(i=0;i10;i++){j=(-1)*j;res=j*jishux(2*i+1,x)+res;}return res;}double cos(float x) //计算cos的值{char i1;char j1=-1;double res1=0.0;for(i1=0;i110;i1++){j1=(-1)*j1;res1=j1*jishux(2*i1,x)+res1;}return res1;}double jishux(char x,float y) //计算泰勒展开式的级数项{char i;double jishux=1.0;for(i=1;i=x;i++)jishux=jishux*y/i;return jishux;}void Divide(int x) //调用计算sinx,cos的值，并拆分计算结果小数点后八位{ long int y;float z;char j;double t;write_com(0x80);// write_dat(10);// write_dat(11);// write_dat(12);z=x*DtoHD;if(key==11){ write_dat(10); write_dat(11); write_dat(12);y=100000000*sin(z);}if(key==12){y=100000000*cos(z); write_dat(13);write_dat(14);write_dat(15);}if(key==13){t=sin(z)/cos(z);y=t*1000000; write_dat(16);write_dat(17);write_dat(18); } if(key!=13||a=45) { if(a=45key==13) y*=100; write_com(0x80