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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#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit RED_A=P0^0; //東西向燈
sbit YELLOW_A=P0^1;
sbit GREEN_A=P0^2;
, e3 l8 D6 |' M7 l+ Isbit RED_B=P0^3; //南北向燈
sbit YELLOW_B=P0^4;
' W( W. T5 }% }! r5 Vsbit GREEN_B=P0^5;
" p, i/ X! x/ E, ~1 E! c: juchar Flash_Count=0,Operation_Type=1; //閃爍次數，操作類型變量  

//延時
void DelayMS(uint x)
" W5 x/ _. d' W{
uchar i;
while(x--) for(i=0;i<120;i++);
1 b( `! B. I. y: M( D  b) }}
//交通燈切換
void Traffic_Light()
{
switch(Operation_Type)
9 n7 N0 s* e- Y( _3 Q- a{
# |; D5 J7 E* s7 I6 U9 s# ccase 1: //東西向綠燈與南北向紅燈亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
" J3 B7 {1 m9 {; ]( b5 |( H6 W2 jRED_B=0;YELLOW_B=1;GREEN_B=1;
" P7 `. {& ?: V- R+ @9 g3 wDelayMS(2000);
Operation_Type=2;
break;
case 2: //東西向黃燈閃爍，綠燈關閉
DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
if(++Flash_Count!=10) return; //閃爍 5 次
* w5 ^) e2 ]1 O' [2 DFlash_Count=0;
Operation_Type=3;
4 s* f3 `/ l/ Y( ?1 q* jbreak;
' g4 A0 p: v8 q; g  x0 r2 tcase 3: //東西向紅燈，南北向綠燈亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
$ ~2 j1 p( k& a8 Y0 L$ K+ |3 HRED_B=1;YELLOW_B=1;GREEN_B=0;
DelayMS(2000);
+ N2 p" {$ g4 YOperation_Type=4;
( h- O* z2 o0 I& S6 _0 Q% Sbreak;
$ m+ v. w0 H% Ccase 4: //南北向黃燈閃爍 5 次
/ }; k$ b& f* C" s( A2 Q  h% eDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
: Z6 r" Q' `$ O2 u  N: W$ U* xif(++Flash_Count!=10) return;
( z8 k" [: e9 b$ RFlash_Count=0;
8 Q' W  p, j9 J8 t* L$ n4 nOperation_Type=1;
}
6 |- j# `7 c# m/ Y, b3 B}
//主程序
8 ^! X% Z$ A1 o  U- Z- e' e! f+ w' qvoid main()
{
while(1) Traffic_Light();
( x: X! ]6 l, ?$ q2 Q" O% T* g8 u}  
4 v# _6 q1 d( q' r$ ^' l
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3 k$ l% X0 D% a. y! q. D% y% Q