利用单片机实现数码管倒数同时了的流水循环当倒数结束时不流水
#include<reg52.h>
sbit ENLED=P1^4;
sbit ADDR3=P1^3;
sbit KEY_IN_1=P2^4;
sbit KEY_IN_2=P2^5;
sbit KEY_IN_3=P2^6;
sbit KEY_IN_4=P2^7;
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 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 ledbuff[7]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
};
unsigned char keysta[4][4]={
(1,1,1,1),(1,1,1,1),
(1,1,1,1),(1,1,1,1),
};
unsigned char flagstart=0;
unsigned char flag1s=0;
unsigned char countdown=0;
unsigned char T0RH=0;
unsigned char T0RL=0;
void ConfigTimer0(unsigned int ms);
void ShowNumber(unsigned long num);
void Ledflow();
void Keydriver();
void main()
{
ENLED=0;
ADDR3=1;
EA=1;
ConfigTimer0(1);
ShowNumber(0);
while(1)
{
Keydriver();
if(flagstart&flag1s)
{
flag1s=0;
if(countdown>0)
{
countdown--;
ShowNumber(countdown);
Ledflow();
}
else if(countdown==0)
{
ledbuff[7]=0xFF;
}
}
}
}
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 int i;
unsigned char buf[6];
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;
}
for(;i>0;i--)
{
ledbuff[i]=ledchar[buf[i]];
}
}
void KeyAction(unsigned char keycode)
{
if(keycode==0x26)
{
if(countdown<999999)
{
countdown++;
ShowNumber(countdown);
}
}
else if(keycode==0x28)
{
if(countdown>1)
{
countdown--;
ShowNumber(countdown);
}
}
else if(keycode==0x1B)
{
countdown=0;
ShowNumber(countdown);
}
}
void Keydriver()
{
unsigned char backup[4][4]={
{1,1,1,1},{1,1,1,1},
{1,1,1,1},{1,1,1,1},
};
unsigned char i,j;
for(i=0;i<4;i++)
{
for(j=0;j<4;j--)
{
if(keysta!=backup)
{
if(backup!=0)
{
KeyAction(keycodemap[i][j]);
}
backup[i][j]=keysta[i][j];
}
}
}
}
void Ledflow()
{
static unsigned char dir=0;
static unsigned char shift=0x01;
ledbuff[6]=~shift;
if(dir==0)
{
shift=shift<<1;
if(shift==0x80)
{
dir=1;
shift=0x01;
}
}
else
{
shift=shift>>1;
if(shift==0x01)
{
shift=0x80;
}
}
}
void KeyScan()
{
unsigned char keybuff[4][4]={
(0xFF,0xFF,0xFF,0xFF),(0xFF,0xFF,0xFF,0xFF),
(0xFF,0xFF,0xFF,0xFF),(0xFF,0xFF,0xFF,0xFF),
};
unsigned char i=0;
unsigned char keyout=0;
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;
}
else 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<6)
i++;
else
i=0;
}
void InterruptTimer0() interrupt 1
{
unsigned char tmr;
TH0=T0RH;
TL0=T0RL;
LedScan();
KeyScan();
tmr++;
if(tmr>=1000)
{
flag1s=1;
tmr=0;
}
else
{
tmr=0;
}
}
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