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//按樓主意圖優(yōu)化編寫
//雙路0.1~99.9秒倒計時演示程序
//此程序適合51單片機和STC1T單片機
//也適合共陽/共陰數(shù)碼管
#include<reg51.h>
#include<intrins.h>
#define key_S 10 //宏定義短按(約10ms)
#define key_L key_S*50 //宏定義長按(約500ms)
#define key_I key_S*38 //宏定義長按連+/-間隔(約120ms)
#define uchar unsigned char
#define uint unsigned int
//端口根據(jù)實際電路重新定義
sbit K1 =P1^0;
sbit K2 =P1^1;
sbit K3 =P1^2;
sbit IN1=P1^3;
sbit IN2=P1^4;
sbit IN3=P1^5;
sbit OUT1=P1^6;
sbit OUT2=P1^7;
/*
uchar code table[]={//共陽數(shù)碼管段碼"0~f-."
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xa1,0x86,0x8e,0xbf,0x7f};
*/
uchar code table[]={//共陰數(shù)碼管段碼"0~f-."
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0x40,0x80};
uchar data dis_buf[4];//顯示數(shù)據(jù)緩存
bit state1,state2;//倒計時狀態(tài)
int time1=115,time2=225;
uchar KeySec;
int num=0,num1=0;
bit flashing=0;
//12T51單片機
void Delay1ms() //@11.0592MHz
{
unsigned char i, j;
_nop_();
i = 2;
j = 199;
do
{
while (--j);
} while (--i);
}
void Timer0Init() //10毫秒@11.0592MHz
{
TMOD |= 0x01; //設(shè)置定時器模式
TL0 = 0x00; //設(shè)置定時初值
TH0 = 0xDC; //設(shè)置定時初值
// TR0 = 1; //定時器0開始計時
ET0 = 1;
EA = 1;
}
//STC1T單片機
/*void Delay1ms() //@11.0592MHz
{
unsigned char i, j;
i = 15;
j = 90;
do
{
while (--j);
} while (--i);
}
void Timer0Init() //10毫秒@11.0592MHz
{
AUXR &= 0x7F; //定時器時鐘12T模式
TMOD &= 0xF0; //設(shè)置定時器模式
TMOD |= 0x01; //設(shè)置定時器模式
TL0 = 0x00; //設(shè)置定時初值
TH0 = 0xDC; //設(shè)置定時初值
TF0 = 0; //清除TF0標志
// TR0 = 1; //定時器0開始計時
ET0 = 1;
EA = 1;
}
*/
//按鍵掃描
void keyscan()
{
static unsigned int count=0;
if(!K1||!K2||!K3)
{
count++;
if(count>key_L)//長按有效
count=key_I;//連+/-間隔
if(count==key_S)//短按消抖
{
if(!K1)//預(yù)設(shè)
{
KeySec++;
if(KeySec>=3)
{
KeySec=0;
}
}
}
if(count==key_S||count==key_L)//短按+/-，長按連+/-
{
if(!K2 && KeySec>0)
{
switch(KeySec)
{
case 1: if(time1<999)time1++; break;
case 2: if(time2<999)time2++; break;
}
}
if(!K3 && KeySec>0)
{
switch(KeySec)
{
case 1: if(time1>1)time1--; break;
case 2: if(time2>1)time2--; break;
}
}
}
}
else count=0;
}
void INscan()
{
if(KeySec==0 && TR0==0)
{
if(!IN1)
{
TR0=1;
OUT1=0;
OUT2=1;
state1=1;
state2=0;
num1=0;
num=time1;
}
if(!IN2)
{
TR0=1;
OUT1=1;
OUT2=0;
state1=0;
state2=1;
num1=0;
num=time2;
}
}
if(!IN3)
{
OUT1=1;
OUT2=1;
state1=0;
state2=0;
num1=0;
num=0;
}
}
void display()//顯示
{
static uchar i=0;
uchar j=0;
if(KeySec==0)
{
if(state1==0 && state2==0)
{//顯示----
// for(j=0;j<4;j++)
// dis_buf[j] = 0xbf;//共陽-
for(j=0;j<4;j++)
dis_buf[j] = 0x40;//共陰-
}
else
{
if(state1==1)//顯示A倒計時時間
// dis_buf[0] = 0x88;//共陽A
dis_buf[0] = 0x77;//共陰A
else if(state2==1)//顯示B倒計時時間
// dis_buf[0] = 0x83;//共陽b
dis_buf[0] = 0x7c;//共陰b
dis_buf[1] = table[num/100%10];
// dis_buf[2] = table[num/10%10]&0x7f;//共陽加小數(shù)點
dis_buf[2] = table[num/10%10]|0x80;//共陰加小數(shù)點
dis_buf[3] = table[num%10];
}
}
if(KeySec==1)
{//顯示A預(yù)設(shè)時間
// dis_buf[0] = 0x88; //共陽A
dis_buf[0] = 0x77; //共陽A
dis_buf[1] = table[time1/100%10];
// dis_buf[2] = table[time1/10%10]&0x7f;//共陽加小數(shù)點
dis_buf[2] = table[time1/10%10]|0x80;//共陰加小數(shù)點
dis_buf[3] = table[time1%10];
}
if(KeySec==2)
{//顯示B預(yù)設(shè)時時間
// dis_buf[0] = 0x83; //共陽b
dis_buf[0] = 0x7c; //共陽b
dis_buf[1] = table[time2/100%10];
// dis_buf[2] = table[time2/10%10]&0x7f;//共陽加小數(shù)點
dis_buf[2] = table[time2/10%10]|0x80;//共陰加小數(shù)點
dis_buf[3] = table[time2%10];
}
//共陽數(shù)碼管驅(qū)動
/* P2&=0xf0;//消隱
P0=dis_buf[i];//送段碼
P2|=0x01<<i;//送位碼
*/
//共陰數(shù)碼管驅(qū)動
P0=0x00;//消隱
P2&=0xf0;//清低4位
P0=dis_buf[i];//送段碼
P2|=~(0x01<<i);//送位碼
i++;i%=4;
}
void main()//主函數(shù)
{
Timer0Init();//定時器初始化程序
while(1)
{
keyscan(); //按鍵掃描
INscan(); //輸入掃描
display(); //數(shù)碼管顯示
Delay1ms(); //控制主循環(huán)約1ms
}
}
void Timer0Interrupt(void) interrupt 1
{
TL0 = 0x00; //設(shè)置定時初值
TH0 = 0xDC; //設(shè)置定時初值
num1++;
if(num1>=10)
{
num1=0;
num--;
if(num<=0)
{
num=0;
OUT1=1;
OUT2=1;
state1=0;
state2=0;
TR0=0;
}
}
}

復(fù)制代碼