5-LED模擬交通燈單片機C語言程序設計實訓100例

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( V& A1 M2 w0 P5 N! _+ {7 \* F#include<reg51.h>
) i) j9 d7 M  v#define uchar unsigned char
- q! c% j+ P0 `: V#define uint unsigned int
sbit RED_A=P0^0; //東西向燈
sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
sbit RED_B=P0^3; //南北向燈
sbit YELLOW_B=P0^4;
& ]1 Y4 V' a9 k  D; dsbit GREEN_B=P0^5;
) k2 B) @6 H6 _  X0 ruchar Flash_Count=0,Operation_Type=1; //閃爍次數(shù),，操作類型變量  
! u# s1 d2 U+ E' P/ A
1 M1 Z" ?1 h$ e# y/ A6 g//延時
void DelayMS(uint x)
0 [0 r. T' O* {$ Q{
8 [4 k, G! C" N  U- {/ {' Fuchar i;
' y! ~0 G# h5 Q* I9 a6 Iwhile(x--) for(i=0;i<120;i++);
}
//交通燈切換
6 k/ E( }4 y# `% {  [void Traffic_Light()
( {; g' w% M" z( K{
switch(Operation_Type)
{
+ R$ d2 C& `( F. x7 U/ x/ Icase 1: //東西向綠燈與南北向紅燈亮
7 l7 F5 r) P2 y8 q' A. v& QRED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
- f2 V2 n& O. p1 w# v5 e. Q3 |DelayMS(2000);
Operation_Type=2;
break;
" L6 o! G8 [1 O( R: b$ u) E+ X: Kcase 2: //東西向黃燈閃爍,，綠燈關閉
DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
; X# J# A% K6 u% S) A7 q# ~if(++Flash_Count!=10) return; //閃爍 5 次
Flash_Count=0;
Operation_Type=3;
break;
case 3: //東西向紅燈,，南北向綠燈亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
RED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
Operation_Type=4;
break;
case 4: //南北向黃燈閃爍 5 次
9 A2 H. R- Z$ ^DelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
- G. I  s$ i1 `if(++Flash_Count!=10) return;
) ?9 `* |$ ]8 O3 l6 _Flash_Count=0;
8 h7 ^3 U, @3 w- COperation_Type=1;
7 J$ G7 s; v* Z1 \* {7 r/ J2 L; H}
}
* r, m# a" [3 B; t//主程序
void main()
{
while(1) Traffic_Light();
}