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#include<reg51.h>1 T h5 X ]! S0 t3 @9 r
#define uchar unsigned char) y8 `$ C7 U/ @- _0 F7 q7 K& Q
#define uint unsigned int
/ W8 _$ l4 q' S: I& zsbit CLK=P2^4;
2 ~) {) z F: Y c, T8 X# msbit ST=P2^5;
" y \! F6 g% T. ]6 _5 usbit EOC=P2^6;
2 {4 Y( ?4 l; a3 H: D3 Z1 u2 P) W5 usbit OE=P2^7;
& R' K( q [) c- y3 {0 h; z- |sbit PWM=P3^0;
3 m |* v! l) {* Y+ H: P, A2 B U& j" R' {) D# p l6 n
void DelayMS(uint ms)2 ^. h' G X8 h% R0 [
{* X: U# b( W+ B0 C* R" i
uchar i;
3 o! y% s$ Q$ Y! V; }while(ms--) for(i=0;i<40;i++);
# j% k& B0 L A" }; z, c; P/ c* p}
" _/ m6 A# s1 p8 c$ W# Q% _, ]% M! p& `0 }3 H
void main()
- u1 _, n9 ^! K7 J- x9 A{( X3 j0 D5 s( s2 T$ J0 C$ I
uchar Va1;
6 r7 U G/ ]7 k N3 h) Z+ f) N1 WTMOD=0x02;
9 N# U$ D2 I- l* d5 T! P0 gTH0=0x14;
0 e1 [% L5 T7 \ l+ o- {TL0=0x00;; }0 T+ |% h0 `1 N: ?
IE=0x82;1 P/ p" s. T# v" X
TR0=1;* O. j6 E, X6 Q, I9 \) x
while(1)
$ C! Q% S' F; A t5 W5 E{
$ k( h% ~+ S2 \ST=0;ST=1;ST=0;7 ^9 f( d6 b; @" {) U4 A- h
while(!EOC);
* d- V; F. K5 m) z4 ^+ i* OOE=1;
8 l$ ~' q8 h% f+ c! M9 b, y, U* dVa1=p1;6 y# j1 `& u/ F5 G- B5 f' Z" E8 Q
OE=0;
+ X: N% K; F% w# d. l8 C$ j9 [0 E+ Gif(Va1==0)
M' F4 Y4 @. R6 J& L{) ]- h: p2 Q, o# k& V
PWM=0;
, L# g: I( N) H* w e7 ?% f( `if(Va1==0xff);
, g t R# n1 ^# ocontinue;$ t% \) O6 ~) S+ b9 C! [+ j4 e
}, @ m0 B% {) _5 S5 A9 ]% X
if(Va1==0xff)3 M, U5 w, P* J: _1 Y
{
1 C7 v% p4 y/ J9 A# LPWM=1;
& `. ~9 H% }, A% z6 JDelayMS(0xfff);6 l6 q5 |7 t9 Q% z( j J! r5 W3 L
continue;5 Y4 `0 c' I0 v3 u/ b8 t
}
. o( W- C3 w! F, N7 KPWM=1;
5 q9 `# f2 E0 { |/ @5 { r% ^# C' [DelayMS(Va1);
7 Z. Q' n' l$ uPWM=0;
8 d: u4 V( Y* E l- z% c, TDelayMS(0xff-Val);2 p: U) U* I+ o* d* N; O* T
}
% W {% @; @& u* q}
5 f' O# p0 S* p! r# j! I/ ~7 _- j ^ d+ @& v. e
void Timer0_INT() interrupt 1
" @% ^% E* P/ @0 U& w2 r{
7 R, ?1 T U9 ZCLK=~CLK;. l) U1 _9 i y3 D& P1 J3 ?0 |( a
}
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发表于 2022-6-21 09:48
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