430 单片机 计算器

#include

const unsigned char data[22] ={0xc0,0xf9,0xa4,0xb0,

0x99,0x92,0x82,0xf8,0x80,0x90,

0x88,0x83,0xc6,0xa1,0x86,0x8e,

0x8f,0xbf,0x89,0xb9,

0xff,0xaf};//0~9 a~f 符号

unsigned char segment[8] = {20,20,0,0,0,0,0,0};//初始数码管

unsigned char flag1=0;

void delay(unsigned int j)

{

unsigned int i;

for(i=0;i

}

unsigned int jisuan()

{unsigned int y;

y=segment[2]*100000+segment[3]*10000+segment[4]*1000+segment[5]*100+segment[6]*10+s egment[7];

return y;

}

void clear(void)

{unsigned int a;

for(a=7;a>1;a--)

segment[a]=0;

}

void zhuanhuan( unsigned long r)

{

segment[7]=r%10;

segment[6]=r/10%10;

segment[5]=r/100%10;

segment[4]=r/1000%10;

segment[3]=r/10000%10;

segment[2]=r/100000%10;

}

unsigned char getkey(void)

{

unsigned char m,n=16;

P1OUT=0x00;

if((!(P1IN&BIT4))||(!(P1IN&BIT5))||(!(P1IN&BIT6))||(!(P1IN&BIT7)))

{delay(10000);

if((!(P1IN&BIT4))||(!(P1IN&BIT5))||(!(P1IN&BIT6))||(!(P1IN&BIT7)))

{

flag1=1;

for(m=0;m<=2;m++)

{

P1OUT=~BIT0;

if(!(P1IN&BIT7)){n=3;break;}

if(!(P1IN&BIT6)){n=7;break;}

if(!(P1IN&BIT5)){n=11;break;}

if(!(P1IN&BIT4)){n=15;break;}

P1OUT=~BIT1;

if(!(P1IN&BIT7)){n=2;break;}

if(!(P1IN&BIT6)){n=6;break;}

if(!(P1IN&BIT4)){n=14;break;}

if(!(P1IN&BIT5)){n=10;break;}

P1OUT=~BIT2;

if(!(P1IN&BIT7)){n=1; break;}

if(!(P1IN&BIT6)){n=5; break;}

if(!(P1IN&BIT5)){n=9; break;}

if(!(P1IN&BIT4)){n=13; break;}

P1OUT=~BIT3;

if(!(P1IN&BIT7)){n=0; break;}

if(!(P1IN&BIT6)){n=4; break;}

if(!(P1IN&BIT5)){n=8; break;}

if(!(P1IN&BIT4)){n=12; break;}

delay(20000);

while((!(P1IN&BIT6))||(!(P1IN&BIT7))||(!(P1IN&BIT5))||(!(P1IN&BIT4)))

for(unsigned char j=0;j<=7;j++)

{

P4OUT=0x80>>j;

P2OUT=data[segment[j]];

delay(500);

}

delay(20000);

}

}

}

return (n);

}

void main(void)

{

unsigned char flag=0,i=9;

WDTCTL = WDTPW + WDTHOLD; //关闭看门狗

P5DIR|=BIT7;

P5OUT&=~BIT7;

P4DIR=0xff;

P2DIR=0xff;

P1DIR=0x0f;

P1OUT=0xff;

while(1)

{ unsigned long p,q,r;

unsigned long s=1;

segment[1]=20;

i=getkey();

if((i<10)&(flag1=1))

{

segment[2]=segment[3];

segment[3]=segment[4];

segment[4]=segment[5];

segment[5]=segment[6];

segment[6]=segment[7];

segment[7]=i;

flag1=0;

}

else {

switch(i)

{case 15:segment[0]=19;p=jisuan();clear();flag=15;break;

case 14:segment[0]=18;p=jisuan();clear();flag=14;break;

case 13:segment[0]=17;p=jisuan();clear();flag=13;break;

case 12:segment[0]=16;p=jisuan();clear();flag=12;break;

case 10:segment[0]=10;p=jisuan();clear();flag=10;break;

case 11:{q=jisuan(); clear();

switch(flag)

{case 12:r=p+q;break;

case 13:r=p-q;break;

case 14:r=p*q;break;

case 15:r=p/q;break;

case 10:for(unsigned i=q;i>0;i--)

{ s=p*s;}

r=s;break;

}

if(r>999999)

{clear();segment[5]=14;segment[6]=14;segment[7]=21; }

else

zhuanhuan(r);

}

break;

}

}

for(unsigned char j=0;j<=7;j++)

{

P4OUT=0x80>>j;

P2OUT=data[segment[j]];

delay(200);

}

}

}