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xianfajushi:
精準(zhǔn)到0.1秒的單片機(jī)秒表
sbit Qitin = P3^0; //啟停按鍵
sbit duan = P2^6; //數(shù)碼段
sbit wei = P2^7; //數(shù)碼位
unsigned char code ShuMaGuan[]={0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
unsigned char code WeiXuanBiao[]={0x00,0xfe,0xfd,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char Js=0; //中斷計(jì)時(shí)
unsigned char Hm=0; //毫秒
unsigned char Mo=0; //秒
void ShuMaXianShi(unsigned char d,unsigned char w)
{
unsigned char YanShi=255;
P0=WeiXuanBiao[w];
wei=1;
wei=0;
P0=ShuMaGuan[d];
duan=1;
While(YanShi--);
duan=0;
}
void ZhongDuanSheZhi()
{
TH0+=0X4c; /*定時(shí)器賦初值, 定時(shí)50ms觸發(fā)中斷, 自動補(bǔ)償方式*/
TL0+=0X00;
TMOD=0X01;
TR0=1;
ET0=1; //開啟定時(shí)器
EA=1; //全局中斷開關(guān)
}
void XianShi()
{
ShuMaXianShi(Hm,3);
ShuMaXianShi(Mo%10,2);
ShuMaXianShi(Mo/10,1);
}
void main()
{
ZhongDuanSheZhi();
while(1)
{
XianShi()
if(!QiTin)
{
if(Js>=2) TR0=!TR0;
while(!QiTin) XianShi();
}
}
}
void ZhongDuan() interrupt 1
{
++Js;
if(!(Js%2))
if(++Hm>=10)
Hm=0;
if(Js>=20)
{
if(++Mo>=60)Mo=0;
Js=0;
}
TH0+=0X4c;
TL0+=0X00;
}
==========================================
void main()
{
ZhongDuanSheZhi();
{
XianShi();
if(!QiTin)
{
//XianShi(/*巧借 8個(gè)數(shù)碼顯示消抖*/);
YanShi=Js;
if(TR0==0){TR0=!TR0;K=1;} //重啟中斷
while(Js==YanShi)XianShi(); //中斷消抖
if(!k)TR0=!TR0;else k=0; //關(guān)閉中斷, 消抖后清除標(biāo)記
while(!QiTin)XianShi(/*按下期間顯示*/);
}
}
}
======================================
另說明代碼工程中的中斷內(nèi)的這句YanShi=Js;要?jiǎng)h除掉，并修改 if(!k&&++Hm>=10) Hm=0;這句，包內(nèi)忘記改了。 |
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