51单片机简易加法计算器

#include

typedefunsignedcharuchar;

typedefunsignedintuint;

typedefunsignedlongulong;

sbitADDR0=P1^0;

sbitADDR1=P1^1;

sbitADDR2=P1^2;

sbitADDR3=P1^3;

sbitENLED=P1^4;

sbitKEY_IN_0=P2^4;

sbitKEY_IN_1=P2^5;

sbitKEY_IN_2=P2^6;

sbitKEY_IN_3=P2^7;

sbitKEY_OUT_0=P2^3;

sbitKEY_OUT_1=P2^2;

sbitKEY_OUT_2=P2^1;

sbitKEY_OUT_3=P2^0;

ucharcodeLEDChar[]={//数码管显示字符转换表

0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,

0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E

};

ucharLEDBuff[6]={//数码管显示缓冲区

0xFF,0xFF,0xFF,0xFF,0xFF,0xFF

};

ucharcodekeyCodeMap[4][4]={//矩阵按键编号到标准键盘键码的映射表

{0x31,0x32,0x33,0x26},//数字键1、数字键2、数字键3、向上键

{0x34,0x35,0x36,0x25},//数字键4、数字键5、数字键6、向左键

{0x37,0x38,0x39,0x28},//数字键7、数字键8、数字键9、向下键

{0x30,0x1B,0x0D,0x27}//数字键0、ESC键、回车键、向右键

};

ucharkeyState[4][4]={//全部矩阵按键的当前状态

{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}

};

ucharT0RH=0;

ucharT0RL=0;

voidShowNumber(ulongnum)

{

chari;

ucharbuf[6];

for(i=0;i<6;i++)

{

buf[i]=num%10;

num/=10;

}

for(i=5;i>=0;i--)

{

if(buf[i]==0)

LEDBuff[i]=0xFF;

else

break;

}

for(;i>=0;i--)

LEDBuff[i]=LEDChar[buf[i]];

}

voidKeyAction(ucharkeyCode)

{

staticulongresult=0;

staticulongnumber=0;

if(keyCode>=0x30&&keyCode<=0x39)

{

number=number*10+keyCode-0x30;

ShowNumber(number);

}

elseif(keyCode==0x26||keyCode==0x0D)

{

result+=number;

number=0;

ShowNumber(result);

}

elseif(keyCode==0x1B)

{

number=0;

result=0;

ShowNumber(number);

}

}

voidKeyDriver()

{

uchari,j;

staticucharbackup[4][4]={

{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}

};

for(i=0;i<4;i++)

for(j=0;j<4;j++)

if(keyState[i][j]!=backup[i][j])

{

if(keyState[i][j]==0)

KeyAction(keyCodeMap[i][j]);

backup[i][j]=keyState[i][j];

}

}

voidKeyScan()

{

staticuchari=0;

staticucharkeyBuf[4][4]={

{0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF},

{0xFF,0xFF,0xFF,0xFF},{0xFF,0xFF,0xFF,0xFF}

};

ucharj;

keyBuf[i][0]=(keyBuf[i][0]<<1)|KEY_IN_0;

keyBuf[i][1]=(keyBuf[i][1]<<1)|KEY_IN_1;

keyBuf[i][2]=(keyBuf[i][2]<<1)|KEY_IN_2;

keyBuf[i][3]=(keyBuf[i][3]<<1)|KEY_IN_3;

for(j=0;j<4;j++)

{

if(keyBuf[i][j]==0x00)

keyState[i][j]=0;

elseif(keyBuf[i][j]==0xFF)

keyState[i][j]=1;

}

switch(i)

{

case0:KEY_OUT_0=1;KEY_OUT_1=0;break;

case1:KEY_OUT_1=1;KEY_OUT_2=0;break;

case2:KEY_OUT_2=1;KEY_OUT_3=0;break;

case3:KEY_OUT_3=1;KEY_OUT_0=0;break;

default:break;

}

i=++i&0x03;

}

voidLEDScan()

{

staticuchari=0;

P0=0xFF;

P1=(P1&0xF8)|i;

P0=LEDBuff[i];

if(i<5)

i++;

else

i=0;

}

voidSetTimer0(uintms)

{

ulongtmp;

tmp=11059326/12;

tmp=tmp*ms/1000;

tmp=65536-tmp;