|
EDA365欢迎您登录!
您需要 登录 才可以下载或查看,没有帐号?注册
x
定时器控制led4 f( q0 J/ x6 T) _7 I
#define ucharunsigned char H" [' z' g3 t8 v1 T- m
#define uint unsigned int' t+ g" t6 E+ @
sbit pwm=P1^0;
- E/ `+ N+ G) S9 q. w) juint N;
8 E% u7 D* ~0 Q7 W- Evoid main()6 z7 ]* ~; J- P( J; y4 i
{" K* R! U# M+ t7 X
TMOD=0x01;
; w) c) V, d W; N r, T0 I7 `, b TH1=(65536-50000)/256;( i- [: {; u$ e) S5 b
TL1=(65536-50000)%256;- t* j: P" v' I7 N: s2 `+ I
EA=1;, C+ a4 q; \2 ]/ A& A1 g
ET1=1;3 W, s9 W1 n7 p9 s
TR1=1;& Z% F: Y3 U7 a: ^: N
while(1);6 u& @3 ^( F, u
}
, w2 A4 J: r1 d0 C void T1_time()interrupt 3; D8 S1 S1 n6 k" x; C- S
{9 @" z9 }) w' I9 N8 Y
TH1=(65536-50000)/256;$ r( e0 S4 r$ h
TL1=(65536-50000)%256;$ z& }2 d8 s* K
N++;) @/ n) p5 @/ S$ |' o# Q% Y0 u
if(N>40)+ h T- w' V0 M, W J& L. J7 z8 J
N=0;5 p" b5 Z% u" s7 i7 g
if(N<=20), t9 l3 @& d+ v% F
pwm=1;: V) R/ G3 N9 T5 R8 ] O1 d
else
/ T" e3 E( _) `5 `" _ pwm=0;! l! `; W8 F; g0 A2 a6 a
}
, G. v7 X v# F( a- x' j3 q
! V; L! B2 p% M |
|