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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H4 N& z: L# e+ Y% S) P9 f( K% e8 P#include
5 Z7 _+ ?9 E8 j3 i0 G! T7 W#define uchar unsigned char
- y7 h, E) _) m' |8 h#define uint unsigned int
" o3 x; z7 r: ^2 dsbit RED_A=P0^0; //东西向灯
sbit YELLOW_A=P0^1;
/ w2 d7 z5 H+ P0 ^) I! Vsbit GREEN_A=P0^2;
0 g' H" S1 U. X* e4 _2 csbit RED_B=P0^3; //南北向灯
sbit YELLOW_B=P0^4;
sbit GREEN_B=P0^5;
1 l3 |4 W7 f; nuchar Flash_Count=0,Operation_Type=1; //闪烁次数，操作类型变量

//延时
void DelayMS(uint x)
; |. @0 i$ M/ V# e. ], U% u0 A5 T{
uchar i;
while(x--) for(i=0;i<120;i++);
}
3 y( ~8 L0 R0 k) _: \//交通灯切换
7 p" Q+ |8 B2 i: _5 g; Uvoid Traffic_Light()
1 S6 T# U5 m/ y* n2 j$ T3 I" J{
switch(Operation_Type)
{
/ I) ]9 {" {& J# ?, pcase 1: //东西向绿灯与南北向红灯亮
RED_A=1;YELLOW_A=1;GREEN_A=0;
RED_B=0;YELLOW_B=1;GREEN_B=1;
DelayMS(2000);
: ]5 h/ U$ ^4 |/ ^4 \6 V7 @) J7 OOperation_Type=2;
, t& P! y9 U: Ebreak;
case 2: //东西向黄灯闪烁，绿灯关闭
DelayMS(300);
: p* Y9 J" v; t* q( c- k: eYELLOW_A=~YELLOW_A;GREEN_A=1;
3 z! \+ J0 N E' h3 Y) a$ _if(++Flash_Count!=10) return; //闪烁 5 次
* Z3 K. W& Y1 S- }- MFlash_Count=0;
Operation_Type=3;
# {4 L l/ p2 Ebreak;
5 l( [2 Q4 U4 ?0 p: r- i% D7 pcase 3: //东西向红灯，南北向绿灯亮
RED_A=0;YELLOW_A=1;GREEN_A=1;
5 K" V; T+ P0 tRED_B=1;YELLOW_B=1;GREEN_B=0;
- h% J! R* v% O8 f9 M' A9 `0 lDelayMS(2000);
Operation_Type=4;
break;
0 z7 n& z% Q3 x0 o# s2 T8 ucase 4: //南北向黄灯闪烁 5 次
5 Z' V& h1 B7 aDelayMS(300);
1 t" {0 F( v# K0 b1 W0 oYELLOW_B=~YELLOW_B;GREEN_B=1;
if(++Flash_Count!=10) return;
" o: ], t% N' c. }. T% ^Flash_Count=0;
( h& K8 |5 J9 ^; P% hOperation_Type=1;
# G1 U9 h4 F7 I( [* b8 C}
9 d6 s" D$ U: d4 E}
+ O6 t* a" q+ M* s2 ^& x//主程序
void main()
{
while(1) Traffic_Light();
}
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