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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" ]; z4 e5 [$ M( b/ t3 p/ [. D#include<reg51.h>
#define uchar unsigned char
7 V) J5 P/ l- y* }, h" T3 A- H#define uint unsigned int
% G, D6 S' M6 j: f3 ^  \) \# [3 asbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
( F4 {8 u6 A; [+ P/ n2 I) x  i9 V4 |uchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量  
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- ]! ~/ E" k, l$ T. i# r( A//延时
void DelayMS(uint x)
{
uchar i;
while(x--) for(i=0;i<120;i++);
, H9 Y# b# T8 r& @  c}
. X6 w* Z/ y3 S//交通灯切换
void Traffic_Light()
. {# Z) ]) K0 W; p4 D# c0 k, o{
& v9 ]( F9 y/ D: o& f& |$ m/ }/ D1 Aswitch(Operation_Type)
& b0 `9 p5 f, W: R& y" j/ W& J{
* {" S7 M# x. n* ~/ X) W3 ?! R- Pcase 1: //东西向绿灯与南北向红灯亮
# c/ u/ O5 v1 l3 T2 B6 mRED_A=1;YELLOW_A=1;GREEN_A=0;
" K. H  ^0 v6 T/ ^9 P! E  hRED_B=0;YELLOW_B=1;GREEN_B=1;
  h# ~% w: W2 \  A: m. N: JDelayMS(2000);
- l9 }) P0 L: x# k9 d; C) G* U) `/ lOperation_Type=2;
break;
case 2: //东西向黄灯闪烁，绿灯关闭
DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
  p* V. B8 b0 t$ v  j: Pif(++Flash_Count!=10) return; //闪烁 5 次
4 T! j6 {4 E' `+ OFlash_Count=0;
$ G3 q& Q& ^  l4 S3 v5 v$ u+ ROperation_Type=3;
4 i/ z, [3 \* r/ Fbreak;
case 3: //东西向红灯，南北向绿灯亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
Operation_Type=4;
break;
# H& p% v- i$ |. K4 d* }5 kcase 4: //南北向黄灯闪烁 5 次
DelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
0 K& P( r0 S# \" @; @- L% fif(++Flash_Count!=10) return;
Flash_Count=0;
Operation_Type=1;
}
}
3 ^* L; f  ~+ A: d//主程序
5 h' B9 u0 V! X  Q# C4 uvoid main()
0 t0 {$ ^/ D5 O- q- w3 n( W% f; k{
( Y- G1 \' P" W4 C. V3 \while(1) Traffic_Light();
0 F8 A: N7 j6 X( w" @}  

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