51單片機(jī)學(xué)習(xí)筆記,簡易時鐘

使用芯片STC89C52RC, 2個鎖存器

6個帶小數(shù)點共陰極數(shù)碼管顯示一個24時制時鐘

沒有時鐘芯片,所以掉電后時間會復(fù)位

原理圖為TX-1C開發(fā)板

暫時顯示了半小時,一秒不差,

未驗證有無其他bug,代碼貼上來,歡迎高手指點

==============================

最終顯示的<時.分.秒>是 16.31.37 形式

C代碼

#include

#include"MY51.H"

voidshow();

uint8shi=15;//初始時間15:45:00按復(fù)位按鈕對時

uint8fen=45;

uint8miao=0;

voidmain()

{

startT0(1000);//開始定時器

while(1)

{

show();

}

}

voidshow()//顯示時鐘

{

uint8oneWela,twoWela,threeWela,foreWela,fiveWela,sixWela;//oneWela是最左邊的數(shù)碼管

sixWela=miao%10;

fiveWela=miao/10;

foreWela=fen%10;

threeWela=fen/10;

twoWela=shi%10;

oneWela=shi/10;

displaySMG(oneWela,twoWela,threeWela,foreWela,fiveWela,sixWela,0xf5);//0xf5小數(shù)點位置

}

voidT0_Work()//T0定時器調(diào)用的工作函數(shù)

{

miao++;

if(miao>59)

{

miao=0;

fen++;

}

if(fen>59)

{

fen=0;

shi++;

}

if(shi>23)

{

shi=0;

}

}

C代碼

#ifndef_MY51_H_

#define_MY51_H_

#include

#include

typedefintint16;

typedefintINT16;

typedefunsignedintuint16;

typedefunsignedintUINT16;

typedefunsignedshortuint;

typedefunsignedshortUINT;

typedefunsignedshortword;

typedefunsignedshortWORD;

typedefunsignedlonguint32;

typedefunsignedlongUINT32;

typedefunsignedlongDWORD;

typedefunsignedlongdword;

typedefsignedlongint32;

typedefsignedlongINT32;

typedeffloatfloat32;

typedefdoubledouble64;

typedefsignedcharint8;

typedefsignedcharINT8;

typedefunsignedcharbyte;

typedefunsignedcharBYTE;//WINDOWS的windef.h里面是這么定義的

typedefunsignedcharuchar;

typedefunsignedcharUCHAR;

typedefunsignedcharUINT8;

typedefunsignedcharuint8;

typedefunsignedcharBOOL;//windows中定義BOOL為int

typedefunsignedcharbool;//bool是c++的內(nèi)置類型

#defineTRUE1

#definetrue1

#defineFALSE0

#definefalse0

#defineopen1//open和close用于標(biāo)志打開和關(guān)閉狀態(tài)

#defineOPEN1

#defineclose0

#defineCLOSE0

#definelock0

#definestart1

#defineSTART1

#definestop0

#defineSTOP0

uint8dulaIndex=0;//數(shù)碼管0~F段編碼索引號

uint8welaIndex=0;//0~5位的數(shù)碼管位索引號

sbitdula=P2^6;//段選鎖存器控制控制筆段

sbitwela=P2^7;//位選鎖存器控制控制位置

#defineledP1//燈總線控制

sbitled0=P1^0;//8個led燈

sbitled1=P1^1;

sbitled2=P1^2;

sbitled3=P1^3;

sbitled4=P1^4;

sbitled5=P1^5;

sbitled6=P1^6;

sbitled7=P1^7;

sbitkeyS2=P3^4;//4個獨立按鍵

sbitkeyS3=P3^5;

sbitkeyS4=P3^6;

sbitkeyS5=P3^7;

voiddisplaySMG(uint8one,uint8two,uint8three,uint8four,uint8five,uint8six,uint8dot);

voiddelayms(uint16ms);

voidT0_Work();

//////////////////////////////////////////////////////////////////////////

voiddelayms(uint16ms)//軟延時函數(shù)

{

uint16i,j;

for(i=83;i>0;i--)

{

for(j=ms;j>0;j--)

{}

}

}

///////////////////////////////////////////////////////////////////////////

#definedark0x11//也就是索引第17號元素0x00,共陰極數(shù)碼管正極全部輸入低電平

uint8codetable[]={//0~F外加小數(shù)點和空輸出的數(shù)碼管編碼

0x3f,0x06,0x5b,0x4f,//0123

0x66,0x6d,0x7d,0x07,//4567

0x7f,0x6f,0x77,0x7c,//89AB

0x39,0x5e,0x79,0x71,//CDEF

0x80,0x00//.空空時是第0x11號也就是第17號元素

};

/////////////////////////////////////////////////////////////////////////////

uint8TH0Cout=0;//初值

uint8TL0Cout=0;

uint16T0IntCout=0;//中斷計數(shù)

uint16T0IntCountAll=0;//(N-1)/65536+1;//總中斷次數(shù)

boolbT0Delay=false;//使用延時函數(shù)標(biāo)志,初始未用

boolbT0Over=false;//中斷處理函數(shù)執(zhí)行結(jié)果之一

voidstartT0(uint32ms)//開啟定時器

{