led灯左右移程序。

for(k=7k>=0k--)

改成for(k=7k>0k--)看看。

另外这种层层套的循环，逻辑性太强了。这样的程式可以设两个变量，做分别正反的两个程式，完了就跳出。再设正反标记符作为判断入口。清清楚楚，

你好！

1、左右灯，是转向灯吧，灯亮要互斥

用两个按键来控制，左右转

2、大灯，用一个按键来控制就行

3、是做实物还是用仿真模拟效果

#include<reg51.h>

#define uchar unsigned char

#define uint unsigned int

sbit RED_A=P3^0//东西向指示灯

sbit YELLOW_A=P3^1

sbit GREEN_A=P3^2

sbit RED_B=P3^3//南北向指示灯

sbit YELLOW_B=P3^4

sbit GREEN_B=P3^5

sbit KEY1=P1^0

sbit KEY2=P1^1

sbit KEY3=P1^2

//延时倍数，闪烁次数， *** 作类型变量

uchar Flash_Count=0,Operation_Type=1,LEDsng,LEDsns,LEDewg,LEDews,discnt

uint Time_Count=0,time

uchar ledtab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff}

void displaysn()

{

LEDsng=((time-Time_Count)/20)%10

LEDsns=((time-Time_Count)/20)/10

LEDewg=0x10

LEDews=0x10

}

void displayew()

{

LEDewg=((time-Time_Count)/20)%10

LEDews=((time-Time_Count)/20)/10

LEDsng=0x10

LEDsns=0x10

}

//定时器0 中断函数

void T0_INT() interrupt 1

{

TH0=(65536-50000)/256

TL0=(65536-50000)%256

switch(Operation_Type)

{

case 1: //东西向绿灯与南北向红灯亮

if((Time_Count%20)==0)displayew()

RED_A=0YELLOW_A=0GREEN_A=1

RED_B=1YELLOW_B=0GREEN_B=0

if(++Time_Count!=time) return

Time_Count=0

Operation_Type=2

break

case 2: //东西向黄灯开始闪烁，绿灯关闭

LEDewg=0x0

LEDews=0x0

if(++Time_Count!=8) return

Time_Count=0

YELLOW_A=~YELLOW_AGREEN_A=0

if(++Flash_Count!=10) return//闪烁

Flash_Count=0

Operation_Type=3

break

case 3: //东西向红灯与南北向绿灯亮

if((Time_Count%20)==0)displaysn()

RED_A=1YELLOW_A=0GREEN_A=0

RED_B=0YELLOW_B=0GREEN_B=1

if(++Time_Count!=time) return

Time_Count=0

Operation_Type=4

break

case 4: //南北向黄灯开始闪烁，绿灯关闭

LEDsng=0x0

LEDsns=0x0

if(++Time_Count!=8) return

Time_Count=0

YELLOW_B=~YELLOW_BGREEN_A=0

if(++Flash_Count!=10) return//闪烁

Flash_Count=0

Operation_Type=1

break

}

}

void t1_isr() interrupt 3

{

TR1=0

TH1=(65536-3000)/256

TL1=(65536-3000)%256

TR1=1

switch(discnt)

{

case 0:

P2=0x02

P0=ledtab[LEDewg]

break

case 1:

P2=0x01

P0=ledtab[LEDews]

break

case 2:

P2=0x08

P0=ledtab[LEDsng]

break

case 3:

P2=0x04

P0=ledtab[LEDsns]

break

default:discnt=0break

}

discnt++

discnt&=0x03

}

void delay()

{

uint i

for(i=0i<1000i++)

}

//主程序

void main()

{

TMOD=0x11//T0 方式1

EA=1

ET0=1

TR0=1

TH1=(65536-3000)/256

TL1=(65536-3000)%256

TR1=1

ET1=1

time=100

Time_Count=100

Time_Count=0

Operation_Type=1

while(1)

{

if(KEY1==0)//按一下加1S

{

delay()

if(KEY1==0)

{

while(KEY1==0)

TR0=0

time+=20

LEDsng=(time/20)%10

LEDsns=(time/20)/10

LEDewg=0x10

LEDews=0x10

}

}

if(KEY2==0)//按一下减1S

{

delay()

if(KEY2==0)

{

while(KEY2==0)

TR0=0

time-=20

if(time==0)time=20

LEDewg=(time/20)%10

LEDews=(time/20)/10

LEDsng=0x10

LEDsns=0x10

}

}

if(KEY3==0) //启动

{

delay()

if(KEY3==0)

{

while(KEY2==0)

TR0=1

Time_Count=0

}

}

}

}

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