1. 视频

bilibili视频地址：

https://www.bilibili.com/video/av91934816

51单片机-交通灯-红绿灯

2. 文件

文件下载地址：

https://download.csdn.net/download/weixin_43130546/12194351

3. 说明

绿灯亮10秒；黄灯亮5秒；红灯亮10秒

4. 代码

#include

sbit DULA = P2^6;

sbit WELA = P2^7;

unsigned char code DUTable[16] = 

{

0x3F,0x06,0x5B,0x4F,

0x66,0x6D,0x7D,0x07,

0x7F,0x6F,0x77,0x7C,

0x39,0x5E,0x79,0x71

};

unsigned char code WETable[8] = 

{

~0x80,~0x40,~0x20,~0x10,

~0x08,~0x04,~0x02,~0x01

};

unsigned char LedBuff[8] = 

{

0x3F,0x3F,0x00,0X00,

0X00,0X00,0X00,0X00

};

unsigned char T0RH,T0RL;

bit flag1s = 0;

void ConfigTimer0(unsigned char ms);

void TransLED(void);

void main(void)

{

ConfigTimer0(1);

while(1)

{

if(flag1s)

{

flag1s = 0;

TransLED();

}

}

}

void TransLED(void)

{

static unsigned char num = 0;

static unsigned char led = 0;

if(0 == num)

{

switch(led)

{

case 0 : led = 1; num = 9; P1 = ~0x04; break;

case 1 : led = 2; num = 4; P1 = ~0x02; break;

case 2 : led = 0; num = 9; P1 = ~0x01; break;

}

}

else

{

num--;

}

LedBuff[0] = DUTable[num/1%10];

LedBuff[1] = DUTable[num/10%10];

}

void ConfigTimer0(unsigned char ms)

{

unsigned long tmp;

tmp = 11059200 / 12;

tmp = tmp * ms / 1000;

tmp = 65536 - tmp;

tmp += 12;

T0RH = (unsigned char)(tmp>>8);

T0RL = (unsigned char)tmp;

TH0 = T0RH;

TL0 = T0RL;

TMOD &= 0xF0;

TMOD |= 0x01;

EA = 1;

ET0 = 1;

TF0 = 0;

TR0 = 1;

}

void LedScan(void)

{

static unsigned char i = 0;

P0 = 0x00;

DULA = 1;

DULA = 0;

P0 = WETable[i];

WELA = 1;

WELA = 0;

P0 = LedBuff[i];

DULA = 1;

DULA = 0;

i++;

if(i>=8)

{

i = 0;

}

}

void InterruptTimer0(void) interrupt 1

{

static unsigned int tmr1s = 0;

TH0 = T0RH;

TL0 = T0RL;

LedScan();

tmr1s++;

if(tmr1s>=1000)

{

tmr1s = 0;

flag1s = 1;

}

}