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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# Q. t, n0 q& T& z1 z4 ?8 Z#include<reg51.h>
#define uchar unsigned char
7 \# [1 N) A! q0 R" w#define uint unsigned int
sbit RED_A=P0^0; //東西向燈
% V" _% O/ W2 e! d) J% m7 }+ w+ ?sbit YELLOW_A=P0^1;
  t9 y- M: L" r- ?7 M8 G2 Ssbit GREEN_A=P0^2;
7 E# {  [  [4 B6 Ksbit RED_B=P0^3; //南北向燈
  `( a/ p) I& B2 U* B. Isbit YELLOW_B=P0^4;
' |  A/ l& j( O6 a& R& }sbit GREEN_B=P0^5;
: [4 G2 H5 B/ e# Iuchar Flash_Count=0,Operation_Type=1; //閃爍次數，操作類型變量  

: c) z" e6 Z" w6 m1 _2 c% @) s//延時
% J  w, z1 T1 R  mvoid DelayMS(uint x)
1 L! u7 U/ Y: i0 {# w{
+ ^' P7 U  [& m' S) tuchar i;
while(x--) for(i=0;i<120;i++);
( c0 k6 s; }. I; p% `- w% l4 d}
//交通燈切換
' k+ l' V; T6 D) {/ K- z8 T+ i8 Jvoid Traffic_Light()
{
8 D2 j9 c: `- Bswitch(Operation_Type)
: y& s7 I8 Z7 y# }& \+ t" s+ R! f{
case 1: //東西向綠燈與南北向紅燈亮
  ?% K# z9 _" B! V) i! p, j4 hRED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
Operation_Type=2;
" k, v. |/ S; o& E# Sbreak;
: a! n" N' W2 [. u/ L! t" a( xcase 2: //東西向黃燈閃爍，綠燈關閉
' |6 ^: i4 d' ^5 v% q7 ^DelayMS(300);
YELLOW_A=~YELLOW_A;GREEN_A=1;
* X* [) ^7 _: A* D' `# h- tif(++Flash_Count!=10) return; //閃爍 5 次
Flash_Count=0;
Operation_Type=3;
break;
3 `" W' b) o, Mcase 3: //東西向紅燈，南北向綠燈亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
$ m- w7 _9 j7 jRED_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
" f- ]3 X3 P" e( q" ZDelayMS(300);
YELLOW_B=~YELLOW_B;GREEN_B=1;
; x9 M  U2 l7 f7 |7 C( d; Xif(++Flash_Count!=10) return;
Flash_Count=0;
Operation_Type=1;
2 Z, u9 R7 V* a& D* E) |1 U}
6 l8 Y6 B- y$ e4 v+ \" {}
//主程序
void main()
$ c1 k3 e; g9 B" R9 G0 i" `{
. t! {, e) _- ywhile(1) Traffic_Light();
}  
* h* k$ h$ b( E1 P; S' o$ I& g
5 o$ ^- O1 G% O: G6 }+ ^