51单片机实现三角函数运算.doc

#include#define uchar unsigned char#define uint unsigned int#define DtoHD 0.017453292519943295sbit lcden=P34;sbit lcdrs=P35;sbit dula=P26;sbit wela=P27;sbit key2=P35;sbit key3=P36;sbit key4=P37;uint h;uchar temp,key,s=0;uchar input9;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=tabledate; 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=tabldalt; 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(a90)/ write_data(11);/ if(s!=0)/ / if(key=11)/ write_data(11);/ if(key=12&a=90)/ write_data(11);/ / if(key=12&(90a181)/ write_data(11); write_dat(0); write_dat(19);/if(key=12&a=0)/ write_dat(2); input0=y/10000000; input1=y%10000000/1000000; input2=y%1000000/100000; input3=y%100000/10000; input4=y%10000/1000; input5=y%1000/100; input6=y%100/10; input7=y%10;/ for(i=0;i8;i+)/ / if(inputi!=0)/ break;/ for(j=0;j8;j+) write_dat(inputj); else if(a85) y*=10; input0=y/10000000; input1=19; input2=y%10000000/1000000; input3=y%1000000/100000; input4=y%100000/10000; input5=y%10000/1000; input6=y%1000/100; input7=y%100/10; input8=y%10;else input0=y/10000000; input1=y%10000000/1000000; input2=19; input3=y%1000000/100000; input4=y%100000/10000; input5=y%10000/1000; input6=y%1000/100; input7=y%100/10; input8=y%10; write_com(0x80+0x41);/ write_dat(1);/ write_dat(19);for(j=0;j180)a-=180;write_com(0x80+0x40);write_data(11);Divide(a);elsewrite_com(0x80); write_dat(10); write_dat(11); write_dat(12);write_com(0x80+0x40); write_data(11);write_data(1);key=0; if(key=12) if(a90&a180&a180&a90&a270&a361) a=a-180; write_com(0x80+0x40); write_data(11); if(a!=90)Divide(a);elsewrite_com(0x80); write_dat(16); w