5-LED模拟交通灯单片机C语言程序设计实训100例

2369353531

, R9 L5 m2 T) l( e#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
2 P7 m, g& u: l0 \3 U; [* u% osbit RED_B=P0^3; //南北向灯
% b. E3 e/ Z' q: D6 r/ ]  }sbit YELLOW_B=P0^4;
, w/ O- K. P8 c+ z) bsbit GREEN_B=P0^5;
! b5 n8 a& u% u; ?& Q2 E, L9 M/ fuchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  

  D6 i/ M* U( j! F, T8 r/ J, \//延时
void DelayMS(uint x)
{
uchar i;
while(x--) for(i=0;i<120;i++);
}
2 {/ ?) g& Y% Z% @; C2 |: ~//交通灯切换
- G- f1 Y8 I' U6 g. `void Traffic_Light()
{
switch(Operation_Type)
/ D& B# r6 G% M. E* L{
( X; A3 \+ ^9 i" P! f. Ecase 1: //东西向绿灯与南北向红灯亮
+ ~" o* f1 U. \7 V+ a4 c% xRED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
Operation_Type=2;
- t7 g2 o4 ]7 @8 b; b# {( o; Cbreak;
  a- J6 e9 [; u6 V1 Mcase 2: //东西向黄灯闪烁，绿灯关闭
DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
5 Q6 T0 K  J- T, Nif(++Flash_Count!=10) return; //闪烁 5 次
Flash_Count=0;
Operation_Type=3;
* p7 ]( u8 y* Z1 t! x6 y# P1 ?break;
: O5 K5 f" j- bcase 3: //东西向红灯，南北向绿灯亮
- \2 p8 Y' R! j( d8 P0 j/ bRED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
. x5 M- w  d, E0 U% L8 w1 \' D5 ZDelayMS(2000);
Operation_Type=4;
break;
5 s- A8 i/ g; Y2 D4 Zcase 4: //南北向黄灯闪烁 5 次
DelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
4 o& ~* D/ L$ @if(++Flash_Count!=10) return;
0 C8 x9 O# _0 h" h( P! fFlash_Count=0;
' |# s/ f( O2 ]: tOperation_Type=1;
}
}
//主程序
8 `; ~; K! c; W6 a/ K( svoid main()
& y8 w# \& w8 U{
while(1) Traffic_Light();
4 q! z9 O, n. ?}  
2 H5 p' u: c& ^. e

5 B" p8 e9 ^/ W1 t