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>
" v) \& J; q% G2 M2 d* J. U#define uchar unsigned char
#define uint unsigned int
0 E5 y% y5 P  [0 K# jsbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
3 \9 u) q" |% vsbit GREEN_A=P0^2;
+ Q/ Z$ Z& v1 ?& Q( O! Rsbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
uchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
$ r1 P" ~1 V2 a, c# F3 j
4 R; P9 `- u* g; T% ?//延时
  G9 P, e- _# I! C; w+ ?6 V6 N4 b7 Cvoid DelayMS(uint x)
' ~. z: O: ~# y9 [1 @{
( v6 S+ I" _1 K7 d' H9 c% Puchar i;
, ?' v2 T0 r6 M& zwhile(x--) for(i=0;i<120;i++);
}
//交通灯切换
void Traffic_Light()
6 y6 B5 B1 R! L# C+ y& T* a, o{
switch(Operation_Type)
{
$ Y0 @& o9 Q0 `& A) bcase 1: //东西向绿灯与南北向红灯亮
# J2 e2 }  t/ |6 ~1 e' ?RED_A=1;YELLOW_A=1;GREEN_A=0;
, E+ N' A& P* Z& ~3 M8 IRED_B=0;YELLOW_B=1;GREEN_B=1;
. P. f% B  T5 E) x- M$ ?DelayMS(2000);
Operation_Type=2;
# p( M5 ~. B' |) W$ R4 Gbreak;
case 2: //东西向黄灯闪烁，绿灯关闭
/ E2 O2 r/ p; i/ T$ N7 PDelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
3 i- z9 h9 c( h- _1 ~if(++Flash_Count!=10) return; //闪烁 5 次
Flash_Count=0;
Operation_Type=3;
break;
case 3: //东西向红灯，南北向绿灯亮
- r: i, j9 _- U2 b/ wRED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
2 t7 n6 G% t: m2 L) HDelayMS(2000);
* f: G. G6 p& B8 K4 XOperation_Type=4;
break;
case 4: //南北向黄灯闪烁 5 次
9 F' f9 J& S% U& h; BDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
if(++Flash_Count!=10) return;
Flash_Count=0;
Operation_Type=1;
" H  L4 ]3 u: r0 U0 L$ o  _& y+ i8 z}
}
0 {" |/ p; }7 ^7 m1 x2 ^) G2 u//主程序
; m4 U! t1 y  J- P& [8 j2 ovoid main()
{
+ w# s; D9 h! M1 {; L3 P6 ]while(1) Traffic_Light();
}  
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