基于C51的简易计算器设计1602显示

这几天在搞这个 希望对大家有帮助

#include

#define uchar unsigned char

#define uint unsigned int

sbit LCM_RW=P3^1; //定义引脚

sbit LCM_RS=P3^2;

sbit LCM_E=P3^0;

#define LCM_Data P2

#define Busy 0x80 //用于检测LCM状态字中的Busy标识

unsigned long xnn(unsigned char n);

void WriteDataLCM(unsigned char WDLCM);

void WriteCommandLCM(unsigned char WCLCM,BuysC);

unsigned char ReadDataLCM(void);

unsigned char ReadStatusLCM(void);

void LCMInit(void);

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);

void DisplayListChar(unsigned char X, unsigned char Y, unsigned char *DData);

void Delay5Ms(void);

void Delay400Ms(void);

unsigned char TAB1[16]={"123+456-789*00=/"};

unsigned char TAB2[16]={0x77,0x7b,0x7d,0x7e,0xb7,0xbb,0xbd,0xbe,0xd7,0xdb,0xdd,0xde,0xe7,0xeb,0xed,0xee};

unsigned char XX[2][5]={{""},{""}};

unsigned char YY[5]={""};

void main(void)

{unsigned char n,m,a,b,c,x,y;

unsigned char sc1,sc2,fuhao,r,sw1,sw2,rr,rrr;

unsigned long s1,s2,jieguo;

P0=0x00;

AA:

Delay400Ms(); //启动等待，等LCM讲入工作状态

LCMInit(); //LCM初始化

Delay5Ms(); //延时片刻(可不要)

rrr=1;

rr=0;

c=0;

x=0;

sc1=sc2=0;

s1=s2=0;

sw1=sw2=0;

while(1)

{

P1=0xf0;

m=(P1&0xf0);

P1=0x0f;

n=(P1&0x0f);

y=n|m;

if(x!=y)a=1;

while(a)

{P1=0x0f;

n=(P1&0x0f);

P1=0xf0;

m=(P1&0xf0);

if((n!=0x0f)||(m!=0xf0))

{x=n|m;

for(b=0;b<16;b++)

{if(x==TAB2[b])

{if(b==13)goto AA;

a=0;

c++;

if(b==3||b==7||b==11||b==15)

{sc1=1;

sw1=sc2;

sc2=0;

fuhao=b;

}

else if(b!=14)sc2++;

break;

}

}

}

}

if(b!=14&&b!=20)

{DisplayOneChar(c-1,0,TAB1[b]);

if((b!=3)&&(b!=7)&&(b!=11)&&(b!=15))

XX[sc1][sc2-1]=TAB1[b];

b=20;

}

else if(b==14)

{sw2=sc2;

for(r=0;r<sw1;r++)s1+=(XX[0][r]-'0')*xnn(sw1-r-1);

for(r=0;r<sw2;r++)s2+=(XX[1][r]-'0')*xnn(sw2-r-1);

switch(fuhao)

{case(3):{jieguo=s1+s2;break;}

case(7):{jieguo=s1-s2;break;}

case(11):{jieguo=s1*s2;break;}

case(15):{jieguo=s1/s2;break;}

}

YY[0]=(jieguo/10000)+'0';

YY[1]=(jieguo%10000/1000)+'0';

YY[2]=(jieguo%1000/100)+'0';

YY[3]=(jieguo%100/10)+'0';

YY[4]=(jieguo%10)+'0';

/*DisplayListChar(0,1,XX[0]);

DisplayOneChar(7,1,'0'+sw1);

DisplayListChar(8,1,XX[1]);

DisplayOneChar(15,1,'0'+sw2); */

DisplayOneChar(0,1,TAB1[14]);

for(r=0;r<5;r++)

{if(YY[r]!='0')rr=1;

if(rr)DisplayOneChar(rrr++,1,YY[r]);

}

if(!rr)DisplayOneChar(1,1,'0');

b=20;

}

Delay5Ms();

Delay5Ms();

Delay5Ms();

Delay5Ms();

}

}

//写数据

void WriteDataLCM(unsigned char WDLCM)

{

ReadStatusLCM(); //检测忙

LCM_Data = WDLCM;

LCM_RS = 1;

LCM_RW = 0;

LCM_E = 0; //若晶振速度太高可以在这后加小的延时

LCM_E = 0; //延时

LCM_E = 1;

}

//写指令

void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测

{

if (BuysC) ReadStatusLCM(); //根据需要检测忙

LCM_Data = WCLCM;

LCM_RS = 0;

LCM_RW = 0;

LCM_E = 0;

LCM_E = 0;

LCM_E = 1;

}

//读数据

unsigned char ReadDataLCM(void)

{

LCM_RS = 1;

LCM_RW = 1;

LCM_E = 0;

LCM_E = 0;

LCM_E = 1;

return(LCM_Data);

}

//读状态

unsigned char ReadStatusLCM(void)

{

LCM_Data = 0xFF;

LCM_RS=0;

LCM_RW = 1;

LCM_E = 0;

LCM_E = 0;

LCM_E = 1;

while (LCM_Data & Busy); //检测忙信号

return(LCM_Data);

}

void LCMInit(void) //LCM初始化

{

LCM_Data = 0;

WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,0);

Delay5Ms();

WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号

WriteCommandLCM(0x08,1); //关闭显示

WriteCommandLCM(0x01,1); //显示清屏

WriteCommandLCM(0x06,1); // 显示光标移动设置

WriteCommandLCM(0x0C,1); // 显示开及光标设置

}

//按指定位置显示一个字符

void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)

{

Y &= 0x1;

X &= 0xF; //限制X不能大于15，Y不能大于1

if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;

X |= 0x80; //算出指令码

WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码

WriteDataLCM(DData);

}

//按指定位置显示一串字符

void DisplayListChar(unsigned char X, unsigned char Y, unsigned char *DData)

{

unsigned char ListLength;

ListLength = 0;

Y &= 0x1;

X &= 0xF; //限制X不能大于15，Y不能大于1

while (DData[ListLength]>0x20) //若到达字串尾则退出

{

if (X <= 0xF) //X坐标应小于0xF

{

DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符

ListLength++;

X++;

}

}

}

//5ms延时

void Delay5Ms(void)

{

unsigned int TempCyc = 5552;

while(TempCyc--);

}

//400ms延时

void Delay400Ms(void)

{

unsigned char TempCycA = 5;

unsigned int TempCycB;

while(TempCycA--)

{

TempCycB=7269;

while(TempCycB--);

};

}

unsigned long xnn(unsigned char n)

{unsigned char i;

unsigned long x=1;

for(i=1;i<=n;i++)

{x*=10;

}

return(x);

}