本帖最后由 乡村猎手 于 2018-10-10 22:20 编辑
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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?
! e- k9 I8 ~7 F* Q7 x% K" d#include <reg51.h>
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) E/ l! d% e- n8 Hsbit key1 = P0^7;
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! N8 p' W2 j; K6 e% s) q5 Ychar status=0; //1:play 0:stop 2:forw 3:rew 4:rec 9:off1 M7 G1 P; W4 v4 V u& G, K4 o
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char recflag = 0 ;
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6 \, Q0 r( d9 u4 J! n# C+ A0 d+ ^void Play(void)! l4 r3 N+ q, e2 S! {
{
+ ?( C5 q) z: L- e P1=0X48;
/ B# o, q' A1 ]5 l9 } P2=0XF1;" v3 ~. q0 @- t- x
P3=0X01;. h& p2 u7 g2 F3 C
status=1;
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2 t% h; c# h0 M0 a- o1 _7 Xvoid Rec(void)2 B3 T& ?) B0 @, _. t \
{
$ {5 s9 h$ e8 z- J' ]- j P1=0X48;% B+ q. i- ^7 t: {% G; j
P2=0XF5;4 @6 {/ x! k% \9 y0 g, j
P3=0X01;0 a$ F0 s, }4 k9 t2 _4 U# @
status=1; N2 z. H9 I4 K' g" t! X1 r
}
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# q4 w2 B: ^, x# x& K* tvoid Stop(void)
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P1=0X8E;
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P3=0X48;
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void Forw(void)
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6 \+ X5 L! D& Y P1=0X7C;0 s1 w t* x Y! P7 U! _; x- g
P2=0XF3;
( m+ c, Z7 c/ _: d: O P3=0X20;
3 M4 x0 o3 K; j/ N* u status=0;
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9 z% F# O4 r8 h2 F2 y( M! V, ]5 Pvoid Rew(void)
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P1=0X0C;; w8 E/ S0 X: G! ~ R* L/ X
P2=0XF3;
, K1 a" W) N, O+ x P3=0X27;/ W# a& U% k, H6 o) \3 `) N5 |
status=0;
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void main(void)
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unsigned char i;
, B/ j% u( N9 d$ x2 Y unsigned int k;
- o8 V0 L0 u" Z+ w2 V) l7 M8 n8 `// unsigned char j;
C9 M# ]2 z# n P1=0;
' N7 A$ x$ K- w9 d& W# Y2 j- u Stop();
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while(1)9 q; B o3 L6 ]
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recflag = 0 ;
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P0= i<<4 ;) q6 S4 ]7 }& {8 ^2 o' \$ X9 u
for (k=0;k<1000;k++) $ R; D+ u% s' y$ I
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// for (j=0;j<10;j++);
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if (i==0&&key1==0)//play! k0 L& H$ p s: d( r( y
{
5 ^9 a& ?2 m& W3 Q, O! J" y! R; w recflag=1;
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if (i==1&&key1==0) //stop
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Stop();
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& K$ C. a4 d0 u' ` if (i==2&&key1==0)//play
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if (recflag==1)
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Rec();
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Play();: w; \* q8 `& U/ A8 R' Y+ O
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& }/ N f. ]6 H+ b) k( y4 N if (i==3&&key1==0)//Forw
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Forw();
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if (i==4&&key1==0)//Rew
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Rew();
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