对以前的知识进行了复习对过往的知识掌握的更加牢固
同时写了一个计算器的程序对以前的知识进行巩固
#include<reg52.h>
sbit ENLED=P1^4;
sbit ADDR3=P1^3;
sbit KEY_IN_1=P2^4;
sbit KEY_IN_2=P2^3;
sbit KEY_IN_3=P2^2;
sbit KEY_IN_4=P2^1;
sbit KEY_OUT_1=P2^3;
sbit KEY_OUT_2=P2^2;
sbit KEY_OUT_3=P2^1;
sbit KEY_OUT_4=P2^0;
unsigned T0RH=0;
unsigned T0RL=0;
unsigned char code ledchar[]= {
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
unsigned char code keycodemap[4][4]= {
{ 0x31, 0x32, 0x33, 0x26 },
{ 0x34, 0x35, 0x36, 0x25 },
{ 0x37, 0x38, 0x39, 0x28 },
{ 0x30, 0x1B, 0x0D, 0x27 }
};
unsigned char keysta[4][4]={
{1,1,1,1},{1,1,1,1},
{1,1,1,1},{1,1,1,1}
};
unsigned char ledbuff[6]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};
void ConfigTimer0(unsigned int ms);
void Keydriver();
void main()
{
EA=1;
ENLED=0;
ADDR3=1;
ConfigTimer0(1);
ledbuff[0]=ledchar[0];
while(1)
{
Keydriver();
}
}
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp;
tmp=11059200/12;
tmp=(tmp*ms)/1000;
tmp=65536-tmp;
tmp=tmp+18;
T0RH=(unsigned char)(tmp>>8);
T0RL=(unsigned char)tmp;
TMOD=TMOD&0xF0;
TMOD=TMOD&0x01;
TH0=T0RH;
TL0=T0RL;
ET0=1;
TR0=1;
}
void ShowNumber(unsigned long num)
{
unsigned char i;
unsigned char sign=0;
unsigned char buf[6];
if(num<0)
{
sign=0;
num=-num;
}
else
{
sign=1;
}
for(i=0;i<6;i++)
{
buf[i]=num%10;
num=num/10;
}
for(i=5;i>=1;i--)
{
if(buf[i]==0)
ledbuff[i]=0xFF;
else
break;
}
if(sign!=0)
{
if(i<5)
{
ledbuff[i+1]=0xBF;
}
for(;i>=0;i--)
{
ledbuff[i]=ledchar[buf[i]];
}
}
}
void KeyAction(unsigned char keycode)
{
static unsigned long result=0;
static unsigned long addened=0;
unsigned char sb=0;
if(keycode>=0x30&&keycode<=0x39)
{
addened=(addened*10)+(keycode-0x30);
ShowNumber(addened);
}
else if(keycode==0x26)
{
sb=0;
result=addened;
addened=0;
ShowNumber(addened);
}
else if(keycode==0x28)
{
sb=1;
result=addened;
addened=0;
ShowNumber(addened);
}
else if(keycode==0x25)
{
sb=2;
result=addened;
addened=0;
ShowNumber(addened);
}
else if(keycode==0x0D)
{
if(sb==0)
{
result=result+addened;
}
else if(sb==1)
{
result=result-addened;
}
else
{
result=result*addened;
}
addened=0;
ShowNumber(result);
}
else if(keycode==0x1B)
{
result=0;
addened=0;
ShowNumber(result);
}
}
void Keydriver()
{
unsigned char i,j;
unsigned backup[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(backup[i][j]!=keysta[i][j])
{
if(backup[i][j]!=0)
{
KeyAction(keycodemap[i][j]);
}
backup[i][j]=keysta[i][j];
}
}
}
}
void KeyScan()
{
static unsigned char i=0;
static unsigned char keyout=0;
unsigned char keybuff[4][4]={
{0xFF,0xFF,0xFF,0xFF}, {0xFF,0xFF,0xFF,0xFF},
{0xFF,0xFF,0xFF,0xFF}, {0xFF,0xFF,0xFF,0xFF}
};
keybuff[keyout][0]=(keybuff[keyout][0]<<1)|KEY_IN_1;
keybuff[keyout][1]=(keybuff[keyout][1]<<1)|KEY_IN_2;
keybuff[keyout][2]=(keybuff[keyout][2]<<1)|KEY_IN_3;
keybuff[keyout][3]=(keybuff[keyout][3]<<1)|KEY_IN_4;
for(i=0;i<=4;i++)
{
if((keybuff[keyout][i]&0x0F)==0x00)
{
keysta[keyout][i]=0;
}
if((keybuff[keyout][i]&0x0F)==0x0F)
{
keysta[keyout][i]=1;
}
}
keyout++;
if(keyout>=4)
{
keyout=0;
}
switch(keyout)
{
case 0:KEY_OUT_4=1;KEY_OUT_1=0;break;
case 1:KEY_OUT_3=1;KEY_OUT_2=0;break;
case 2:KEY_OUT_2=1;KEY_OUT_3=0;break;
case 3:KEY_OUT_1=1;KEY_OUT_4=0;break;
default:break;
}
}
void LedScan()
{
static unsigned char i=0;
P0=0xFF;
P1=(P1&0xF8)|i;
P0=ledbuff[i];
if(i<5)
i++;
else
i=0;
}
void InterruptTimer0() interrupt 1
{
TH0=T0RH;
TL0=T0RL;
LedScan();
KeyScan();
}
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