//基于51單片機(jī)的八位數(shù)字秒表

//開(kāi)發(fā)語(yǔ)言：C51

//所選芯片：AT89S51

#include

#include

#define DIG_NONE 0xff;

#define DIG_1 0x7f

#define DIG_2 0xbf

#define DIG_3 0xdf

#define DIG_4 0xef

#define DIG_5 0xf7

#define DIG_6 0xfb

#define DIG_7 0xfd

#define DIG_8 0xfe

#define LINE 0xf7//根據(jù)共陰共陽(yáng)以及接法要調(diào)整

typedef unsigned char Byte;

typedef bit bool;

sbit START = P3^0;

sbit RESET = P3^1;

Byte data dis_digit;

Byte data min;

Byte data sec;

Byte data msec;

bool data isStarted;

Byte data dis_digit;

Byte data dis_index;

Byte data dis_buff[8];

Byte data dis_num[8];

//根據(jù)共陰共陽(yáng)以及數(shù)碼管接法這里要的表要調(diào)整

Byte code number[11]={ 0x28, 0x7E, 0xA2, 0x62, 0x74, 0x61, 0x21, 0x7A, 0x20, 0x60,0xff};//0,1,2,3,4,5,6,7,8,9,關(guān)顯示，數(shù)碼管碼表

Byte dis_buff[8]; // 顯示緩沖區(qū)

Byte dis_num[8]; // 秒計(jì)數(shù)值, BCD碼

Byte dis_index;

bit Scan_Key();

void Proc_Key();

void Delayms(Byte ms);

void Update_buff();

void Msec_Increment();

void Reset(void);

bool Get_Key(bit key);//有效為1

void MCU_Init(void);

void Timer0_Overflow();

void Timer1_Overflow();

//sbit K1 = P3^2;

void Msec_Increment()//中斷里面的設(shè)置

{

msec += 1;

if (msec == 100)

{

msec = 0;

sec += 1;

}

if (sec == 60)

{

sec = 0;

min += 1;

}

if (min == 60)

min = 0;

}

void MCU_Init()

{

P1 = 0xff;

P2 = 0xff;

TMOD = 0x12;

TH1 = 0xd8;

TL1 = 0xf0;

TH0 = 0x9c;

TL0 = 0x00;

////定時(shí)器1選用方式1工作，掃描周期0.01s=10ms，定時(shí)器0選用工作方式3工作，自動(dòng)裝入，掃描周期0.1ms=100μs

Reset();

min = 0;

sec = 0;

msec = 0;

dis_digit = 0x7f; // 初始顯示P20口數(shù)碼管

dis_index = 0;

IE = 0x8a; // 使能timer0, timer1中斷

TR0 = 1;

TR1 = 0;

isStarted = 0;

}

void Reset()

{

min = 0;

sec = 0;

msec = 0;

Update_buff();

}

void Update_buff()

{

dis_num[0] = min / 10;

dis_num[1] = min % 10;

dis_num[3] = sec / 10;

dis_num[4] = sec % 10;

dis_num[6] = msec / 10;

dis_num[7] = msec % 10;

//這里根據(jù)數(shù)碼管的順序進(jìn)行調(diào)整

dis_buff[0] = number[dis_num[7]];

dis_buff[1] = number[dis_num[6]];

dis_buff[2] = LINE;

dis_buff[3] = number[dis_num[4]];

dis_buff[4] = number[dis_num[3]];

dis_buff[5] = LINE;

dis_buff[6] = number[dis_num[1]];

dis_buff[7] = number[dis_num[0]];

}

bool Get_Key(bit key)//有效為1，這里按下為低電平

{

if (key == 0)

return 1;

else

return 0;

}

void timer0() interrupt 1

{

P2 = 0xff; // 先關(guān)閉所有數(shù)碼管

P1 = dis_buff[dis_index]; // 顯示代碼傳送到P0口

P2 = dis_digit; //

dis_digit = _cror_(dis_digit,1); // 位選通值右移(P20<-P27), 下次中斷時(shí)選通下一位數(shù)碼管

//_cror_()為字符循環(huán)右移函數(shù)

dis_index++; //

dis_index &= 0x07; // 8個(gè)數(shù)碼管全部掃描完一遍之后，再回到第一個(gè)開(kāi)始下一次掃描

}

void timer1() interrupt 3

{

TH1 = 0xd8;

TL1 = 0xf0;

Msec_Increment();

Update_buff();

}

void delayms(unsigned char ms)

// 延時(shí)子程序

{

unsigned char i;

while(ms--)

{

for(i = 0; i < 120; i++);

}

}

void main(void)

{

bool startkey, resetkey;

MCU_Init();

while(1)

{

startkey = Get_Key(START);

resetkey = Get_Key(RESET);

if (startkey == 1)

{

Delayms(50);

startkey = Get_Key(START);

if (startkey == 1)

{

isStarted = !isStarted;

TR1 = !TR1;

}

}

if (resetkey == 1 && isStarted == 0)

{

Delayms(20);

resetkey = Get_Key(RESET);

if (resetkey == 1 && isStarted == 0)

{

Reset();

}

}

}

}