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八位數(shù)碼管電子時(shí)鐘
代碼
#include <reg51.h>
sbit key1 = P1^0;
bit flag1s = 0;
bit KeySta = 1;
unsigned char hour = 8;
unsigned char minute = 31;
unsigned char second = 59;
unsigned char mode = 0;
void FreshTime();
void TimeInit();
void IntInit();
void InitLedBuff();
void keyscan();
unsigned char code LedChar[] = { //共陰數(shù)碼管顯示字符轉(zhuǎn)換表
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40,0x00};
unsigned char LedBuff[8] = { //數(shù)碼管顯示緩沖區(qū)
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
void main()
{
TimeInit();
IntInit();
InitLedBuff();
while(1)//顯示內(nèi)容處理
{
if(flag1s&&!mode) //時(shí)間顯示模式
{
flag1s = 0;
FreshTime();
}
else if(mode == 1) //校準(zhǔn)分鐘
{
LedBuff[0] = 17;
LedBuff[1] = 17;
LedBuff[4] = 17;
LedBuff[5] = 17;//不顯示
LedBuff[6] = 17;
LedBuff[7] = 17;
LedBuff[2] = minute/10;
LedBuff[3] = minute%10;
}
else if(mode == 2) //校準(zhǔn)小時(shí)
{
LedBuff[2] = 17;
LedBuff[3] = 17;
LedBuff[4] = 17;
LedBuff[5] = 17;//不顯示
LedBuff[6] = 17;
LedBuff[7] = 17;
LedBuff[0] = hour/10;
LedBuff[1] = hour%10;
}
else if(mode == 3) //校準(zhǔn)完成重新顯示
{
InitLedBuff();
mode = 0;
}
keyscan();
}
}
void InitLedBuff()//初始化時(shí)間到顯示緩沖區(qū)
{
LedBuff[0] = hour/10;
LedBuff[1] = hour%10;
LedBuff[2] = minute/10;
LedBuff[3] = minute%10;
LedBuff[4] = second/10;
LedBuff[5] = second%10;
}
void FreshTime()//刷新時(shí)間到顯示緩沖區(qū)
{
second++;
if(second == 60)//進(jìn)位
{
second = 0;
minute++;
if(minute==60)//進(jìn)位
{
minute=0;
LedBuff[2] = minute/10;
LedBuff[3] = minute%10;
hour++;
if(hour == 24)
hour = 0;
LedBuff[0] = hour/10;
LedBuff[1] = hour%10;
}
}
LedBuff[4] = second/10;
LedBuff[5] = second%10;
}
void TimeInit()//定時(shí)器初始化
{
TMOD = 0X11; //設(shè)置定時(shí)器為模式1
TL0 = 0xB0;
TH0 = 0x3C; //定時(shí)初值 50ms
TL1 = 0x18; //
TH1 = 0xFC; //定時(shí)初值 1ms
TR0 = 1; //定時(shí)器0開始計(jì)時(shí)
TR1 = 1; //定時(shí)器1開始計(jì)時(shí)
ET1 = 1; //使能定時(shí)器1
ET0 = 1; //使能定時(shí)器0
PT0 = 1; //提高計(jì)時(shí)準(zhǔn)確性，提高定時(shí)器0中斷優(yōu)先級
EA = 1; //打開總中斷
}
void IntInit()//外部中斷初始化
{
IT0 = 1; //下降沿觸發(fā)
EX0 = 1; //使能外部中斷0
}
void keyscan() //按鍵掃描及處理
{
static bit backup = 1;
if (KeySta != backup) //當(dāng)前值與前次值不相等說明此時(shí)按鍵有動(dòng)作
{
if (backup == 0) //如果前次值為0，則說明當(dāng)前是彈起動(dòng)作
{
if(mode == 1) //校準(zhǔn)分鐘時(shí)，分鐘加一
{
minute++;
if(minute==60)
minute = 0;
}
else if(mode == 2) //校準(zhǔn)小時(shí)，小時(shí)加一
{
hour++;
if(hour==24)
hour = 0;
}
}
backup = KeySta; //更新備份為當(dāng)前值，以備進(jìn)行下次比較
}
}
void Int0() interrupt 0
{
mode++;
if(mode == 4)
{
mode = 0;
}
}
void Ledfresh() //數(shù)碼管顯示刷新
{
static unsigned char i = 0;
switch(i)
{
case 0 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[0]];i++;break;
case 1 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[1]];i++;break;
case 2 : P2 = ~(0x01<<i);P0 = 0x40;i++;break;//時(shí)分間隔線
case 3 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[2]];i++;break;
case 4 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[3]];i++;break;
case 5 : P2 = ~(0x01<<i);P0 = 0x40;i++;break;//分秒間隔線
case 6 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[4]];i++;break;
case 7 : P2 = ~(0x01<<i);P0 = LedChar[LedBuff[5]];i=0;break;
}
}
void Time0() interrupt 1 // 50ms
{
static unsigned char n = 0;
TL0 = 0xB0;
TH0 = 0x3C;
n++;
if(n==20)
{
n=0;
flag1s = 1;//1s標(biāo)志位
}
}
void Time1() interrupt 3 // 1ms
{
static unsigned char keybuff = 0xff;
TL1 = 0x18; //
TH1 = 0xFC; //定時(shí)初值 1ms
Ledfresh();
keybuff = (keybuff<<1)|key1;
if (keybuff == 0x00)
{ //連續(xù)8次掃描值都為0，即16ms內(nèi)都只檢測到按下狀態(tài)時(shí)，可認(rèn)為按鍵已按下
KeySta = 0;
}
else if (keybuff == 0xFF)
{ //連續(xù)8次掃描值都為1，即16ms內(nèi)都只檢測到彈起狀態(tài)時(shí)，可認(rèn)為按鍵已彈起
KeySta = 1;
}
else
{} //其它情況則說明按鍵狀態(tài)尚未穩(wěn)定，則不對KeySta變量值進(jìn)行更新
}
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