本帖最后由 乡村猎手 于 2018-10-10 22:20 编辑
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5 G) V; i2 ?8 p7 F6 d: k2 l输入和输出的逻辑弄清楚了,写代码就是分分钟的事了。下面是这些功能的C源码。实现的功能就是快进、进退、停止、播放、录音的功能。代码当然有很多种写法,status变量暂时还没用到,可以用在进入某个一功能时判断用,如果机器已经是某个状态再按哪个按钮以不用响应,不过实际试的时候不判断好象也没什么问题。是不是其实很简单呢?
( e7 e8 X, `# v$ D8 ?1 W' C$ r" Y#include <reg51.h>
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- c4 \; [7 R- b- C( j" psbit key1 = P0^7;
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char status=0; //1:play 0:stop 2:forw 3:rew 4:rec 9:off
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char recflag = 0 ;3 W/ E' U; C5 W! k1 z
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void Play(void)& x: K+ m8 G# S, f) t: E! U8 X3 n6 T
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P1=0X48;5 X$ |& x& q" f6 ~
P2=0XF1;, E3 P. Q# y: i; u. T# K1 S1 i
P3=0X01;
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}; b& o3 G, f8 M* w+ ^
void Rec(void)
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P2=0XF5;5 G$ n5 n' R3 D' m( F+ j
P3=0X01;+ O' p1 x' K* M& y: A
status=1;* N- K L8 S8 C4 F4 ^* a
}
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* c3 M. _: z1 wvoid Stop(void)
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P1=0X8E;
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P3=0X48;3 b# i0 S7 I+ F4 r1 \/ P1 A9 ^
status=0;
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void Forw(void)
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+ G7 S4 l9 V4 r d* u% C4 P" \% K P1=0X7C;, D4 B S1 N* q5 ^
P2=0XF3;
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& u# w: P7 T6 m5 M: I- r8 x# b+ R8 Nvoid Rew(void)
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1 }' G$ P; p" o2 d0 C% m/ n, C P1=0X0C;
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status=0;
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void main(void)8 r( n! g8 E7 S4 F7 x
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1 ^0 X3 C$ J, x unsigned char i;
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) L7 T8 R V2 o# Q, j8 { X! @6 K// unsigned char j;( `; m& y' r0 d1 U
P1=0;& q4 Z; D. a# S, ?4 r% Y2 a
Stop();0 d6 H4 @" ~% A( G
key1=1;; D$ X9 h) I+ B t" _
while(1)
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for (i=0;i<8;i++)
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4 ~; K/ y Y/ z. {# E7 F P0= i<<4 ;$ m, A ~; X1 F, m1 m& Z
for (k=0;k<1000;k++) & B" F" K- y) y3 Y
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// for (j=0;j<10;j++);% V% C3 T5 U7 N4 _. H' K4 y
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key1=1;
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1 @* r; x S3 Y if (i==0&&key1==0)//play1 O* B% P( O! @1 Z2 \1 p- ?2 m( z
{
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5 A/ L: H9 ~; h2 d* v) V: Z if (i==1&&key1==0) //stop3 v" c, `: e5 s$ j' t3 ?1 W, c3 P
{
+ x% R$ f- c/ `5 E, ?" K9 s. j: \ Stop();
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* M' M1 \7 j" u if (i==2&&key1==0)//play. D2 F9 \1 E% H" l# ^: L
{
4 z. \5 \6 @) ` if (recflag==1)! l7 B; Z5 E( P7 Q
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Rec();
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2 M! m% z8 d6 q' m" x Play();+ e. {6 F# m0 Z* q
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if (i==3&&key1==0)//Forw W( b7 H& _# e$ \
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Forw();
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! C# Q3 q6 q7 S( P2 F if (i==4&&key1==0)//Rew$ }0 |6 x2 N( X# n
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Rew();
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}
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