5-LED模拟交通灯单片机C语言程序设计实训100例

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#include<reg51.h>
1 @1 f* ?4 u( O3 ~8 G$ q( \#define uchar unsigned char
( h- [2 ?" E, c5 b, Y8 W. j; ~#define uint unsigned int
- }3 p- ]3 V1 x/ C1 w% [sbit RED_A=P0^0; //东西向灯
' q! J2 Q: Q; X) N# `' F( [  Bsbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
; J5 ^+ t& t! X$ k( Nsbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
  t0 v# z, c) K" X4 l- Qsbit GREEN_B=P0^5;
& G1 p0 i# h& ]7 Zuchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
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//延时
void DelayMS(uint x)
{
uchar i;
while(x--) for(i=0;i<120;i++);
+ p( k+ A' ^2 p3 D; Q9 A5 j}
//交通灯切换
void Traffic_Light()
{
9 T) L5 f+ O5 L3 _, Lswitch(Operation_Type)
2 T7 a# {0 G) w: _2 u% n% Z6 n{
3 M$ V! ~( D. @8 Z3 ]; `case 1: //东西向绿灯与南北向红灯亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
; A, n6 v0 ?  }5 }. Q0 ARED_B=0;YELLOW_B=1;GREEN_B=1;
# [5 j5 X4 F; U/ A7 f5 z+ t5 T, `: LDelayMS(2000);
Operation_Type=2;
break;
case 2: //东西向黄灯闪烁，绿灯关闭
DelayMS(300);
- m+ p+ M  t$ I9 ]! e( uYELLOW_A=~YELLOW_A;GREEN_A=1;
if(++Flash_Count!=10) return; //闪烁 5 次
* g% N/ o: O' K3 a/ \: U7 cFlash_Count=0;
  g; c( k9 A: P2 C% ]* _% f: t3 aOperation_Type=3;
9 q' s" _4 v  s3 Xbreak;
case 3: //东西向红灯，南北向绿灯亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
9 C, Q' S5 j% z% l+ M3 kRED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
Operation_Type=4;
break;
case 4: //南北向黄灯闪烁 5 次
2 F! ^. K2 l. CDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
+ k) z1 K$ p" aif(++Flash_Count!=10) return;
- i0 [: L: M2 h- LFlash_Count=0;
Operation_Type=1;
# S/ q6 Q0 @2 o8 ]/ F, d1 t" }! [}
}
! v' \2 s6 |8 k* `, G//主程序
, y7 `3 `( W" @. C* a  qvoid main()
{
while(1) Traffic_Light();
, b0 n9 E8 G5 H9 v9 E4 F}  
& k" b" ?' I4 X: T, ]8 u
4 x4 s  ~- p3 ^/ x3 {