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#include "reg51.h"
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" k* Z/ c! q9 q, T; U5 o) Osbit KEY1=P3^1;
* g6 l l3 m# ksbit KEY2=P3^0;) j- k" l1 I. J: {+ }& P8 h
sbit KEY3=P3^2;8 s- O1 `" T0 H8 [! F
typedef unsigned char u16;
: j1 W1 q& i2 M) T- c3 otypedef unsigned int u8;
; {% b4 \* k( s/ x. _sbit LED1=P2^0;7 P; i+ G5 W/ D, F2 D6 `* i
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#define KEY1_PRESS 1;
! a% |4 ~* A& g: y6 d5 P+ T#define KEY2_PRESS 2;
8 P1 R6 e* S/ }! ]0 J#define KEY3_PRESS 3;
: m) X- W: U4 m9 j#define KEY_UNPRESS 0;! [2 D/ W2 w5 I8 P, ]
void delay_10us(u8 ten_us)$ o! W* V8 |% {# _- C. X
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while(ten_us--);
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u16 key_scan(u16 mode)
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static u16 key=1;8 v" l# c& X! q0 ]
if(mode)key=1;4 K0 E2 V& t9 a2 W$ I- h: q3 ?! g
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if(key=1&&(KEY1==0||KEY2==0||KEY3==0))
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delay_10us(1000);0 J' h1 k& L' A0 @% e; r5 L& S
key=0;- P* p" o. T: [
if(KEY1==0); l# \) k+ _" _4 ?9 l. G: c5 f
return KEY1_PRESS;. ` Y5 I. X* n, G3 c
else if(KEY2==0)
4 _, {; }( q# P5 J# S2 M9 ^3 b9 y, V return KEY2_PRESS;2 t4 \) i6 {, i- t d5 [% a
else if(KEY3==0)- A! {( | d$ H
return KEY3_PRESS; @* z+ ?; E2 s5 c8 t5 k9 [
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else if(KEY1==1&&KEY2==1&&KEY3==1)1 I% e4 @6 m7 C$ r+ }8 q
{
+ f9 w7 m r X T ]3 ^- _ key=1;; L% u. g1 y& d+ V9 _. S
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}
1 W( V! n$ t' B5 Dreturn KEY_UNPRESS;
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}
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+ n6 k1 v3 e& u" `2 mvoid main()
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1 I6 K, O) L m# k1 y F( o u16 key=0;
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e$ |1 p6 D/ j9 i( ~- @ while(1)' E% l0 |7 q: K( C9 G' U: ^" o
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. ^/ C5 d) h: j- y1 S& m+ O# \7 I key=key_scan(0);) _" E! d" P$ k$ e) x& ?
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if (key==KEY1_PRESS)0 W7 @+ \) G# _, g9 k+ R
LED1=!LED1;& w+ g4 Q3 z" O0 ]; S
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}
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4 d8 e1 n' \9 T e4 Lanjian.c(32): error C141: syntax error near 'else', expected '__asm'
# F& l4 w2 J* T" A4 p5 M3 A: Zanjian.c(57): error C141: syntax error near ';', expected ','6 B# B, B1 m+ c2 Q: H N$ M$ b
anjian.c(57): error C141: syntax error near ')', expected '__asm'2 d5 R u& q% w1 Z' G9 X4 L; C
anjian.c - 4 Error(s), 0 Warning(s). [8 [6 `) B4 l. u/ ?
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