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#include<reg51.h>6 O4 i9 z$ y ~: ^0 ]( T# E
#define uchar unsigned char
. `. J$ \0 X6 \#define uint unsigned int
W. c! `$ z4 Gsbit CLK=P2^4;
4 l& {+ i: R9 u8 d q3 h9 c' Osbit ST=P2^5;) N$ e9 U# o2 a% T5 i- E& k
sbit EOC=P2^6;
D; t# @3 i7 ^$ r2 T) m& V2 a8 ]8 l6 Bsbit OE=P2^7;8 P* d( `0 M: Z* L
sbit PWM=P3^0;
7 n9 t& E' B4 k( l) N
5 r2 M5 Q( w3 _# n" Gvoid DelayMS(uint ms)- M3 J8 |5 D% Q; ]/ s
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uchar i;
9 D7 R) n) N' `, K0 l* awhile(ms--) for(i=0;i<40;i++);
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+ z- }/ ?" H3 Tvoid main()! ]- k% z% z# {7 }# e
{
' B+ Z1 S: y/ |3 Fuchar Va1;
$ a, j4 q, r! t+ K; hTMOD=0x02;
2 F$ l h. O' l5 B( b# ?) X) @" qTH0=0x14;, x$ a' |- b( G. p
TL0=0x00;
) V5 T, m; G! U9 u! T% }IE=0x82;
) [' P3 ?9 b! MTR0=1;
5 }2 A- ^8 |7 `+ k, ^% R8 C0 p, \while(1)0 {1 H( H0 B6 R1 P6 }# ~
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ST=0;ST=1;ST=0;3 ^6 K* w2 H, |0 b+ b7 j3 [
while(!EOC);4 u. N5 n: I( f3 v6 O1 K
OE=1;
, R+ p% O$ t" A) sVa1=p1;: ^, M9 Z& k9 t
OE=0;
3 b+ O# W- G2 ]( w. ^7 }" [3 W \( `if(Va1==0)' ~, u6 W/ _; @
{
, E! H* Y6 h/ Q; x! `PWM=0;& }, T3 e& f7 e9 Q0 Z
if(Va1==0xff); d2 \* h' x |# d7 p
continue;
1 J' z0 b& H+ E5 b& _}
6 I* {4 j6 b& w3 B C/ Y7 ?if(Va1==0xff)3 S0 D2 h a! x p
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PWM=1;
* S4 q) z. Z0 W& e' s wDelayMS(0xfff);) s- [; _0 ^7 I( v) u2 I3 a
continue;
0 k4 p5 Z1 m1 ?, C' {2 c9 V6 ^, v}
, N4 S- N! J* z' ?% LPWM=1;7 v/ e' b2 b. f/ h0 `
DelayMS(Va1);
: F+ o# a: V0 }2 F5 y r ZPWM=0;$ v0 q" O+ y' `1 A4 V6 b
DelayMS(0xff-Val);. {) Y. f) x: V( R
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+ L2 l* A! ?2 O$ M. e' o' {3 B
void Timer0_INT() interrupt 1
3 E- { R9 n* H* A; j6 _2 d, S{
; {$ t4 n( o8 d& d" U0 k' Q, lCLK=~CLK;
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发表于 2022-6-21 09:48
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