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发表于 2009-9-1 16:31:15
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#include <stdio.h>
' Z9 V& [+ P+ T( x#include <string.h>
4 ^3 ~2 x* U2 }4 f9 |9 }; l#include <errno.h> " c3 W% e# x# G
#include <unistd.h> & [: R& n& c' @% f T1 |! v# T. a
#include <fcntl.h> 1 ^2 J* N) T% b7 o/ G7 c, y- f
#include <linux/kd.h>
9 A( m0 t# u0 D5 ]* t#include <linux/keyboard.h> ! G3 p* m1 g. i' \# _5 @
#include <termios.h>
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#define KEY_DOWN 0x100
8 T( W( b9 R4 n. }" r#define KEY_UP 0x0003 Y' p; I( j: @4 I
' f; D# ` t3 N `int oldmode;! U4 P4 d4 B& P: Z
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struct termios new;
( n) n4 W' A% R" r) y) Dstruct termios old;
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$ [3 ~- w1 z) q9 gint get_key_input(void)
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int keyboard;. r L8 ]/ a6 t, |/ Z" m
int keyboardcode;' O: r* ]8 C) O6 i5 A3 [: N
, V+ [4 U0 b Vkeyboard = init_keyboard();. b a; T& _; d: n* u' @( J/ m
do{( G2 l! U, ]$ @; V$ ]
keyboardcode = poll_keyboard(keyboard);
# I) }9 M4 Z" x+ U% l1 x# Sif((keyboardcode != 0) && (keyboardcode & KEY_DOWN)){
$ B( i; G: H, Pkeyboardcode = keyboardcode & 0xFF;
8 ?8 q2 w: ~1 X: ?//
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}while( keyboard != 0x58); , c% d) X" v" q8 c
exit_keyboard(keyboard);
7 c* ~# K# y2 A* U3 yreturn 0;
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int exit_keyboard(int keyboard)( c" z# A8 I; G& Z6 U- M5 g
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ioctl(keyboard, KDSKBMODE, oldmode);
8 N* w$ C9 u2 c: x Mtcsetattr( keyboard, 0, &old);
+ X3 j" n. G3 q( \# l4 Bclose(keyboard);
1 M8 D5 [, @1 ]( v& lreturn 0;/ q. }/ y$ S1 G5 z1 A! E
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int init_keyboard(void)$ e7 m# w1 E: j6 ]
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int keyboard;
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3 v' {& @& m4 Ikeyboard = open("/dev/tty", O_RDONLY);
0 I8 Z! n; r7 b8 w0 eioctl(keyboard, KDGKBMODE, &oldmode);
2 W/ g0 y& R7 w" R( M& Ytcgetattr( keyboard, &old);, S/ w7 M H8 d; Q1 @2 Q
tcgetattr( keyboard, &new);
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. U: ?. x2 L7 V; R8 ]6 \0 Dnew.c_lflag &= ~(ICANON | ECHO | ISIG); x5 a2 i# G e. b2 x" V) d
new.c_iflag = 0;' ?- ?( [% W4 _0 u
new.c_cc[VMIN] = 0;( G/ c8 n9 v. t _# P4 H5 q8 O
new.c_cc[VTIME] = 1;) y9 R+ g. M, F5 ]" t
/ L+ E! X# O8 u% P# m+ n' R# |3 Ktcsetattr(keyboard, TCSAFLUSH, &new);, }$ m* q- ]# V
ioctl(keyboard, KDSKBMODE, K_RAW);
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0 `9 z* s( `" Y; B' \return keyboard;8 g" V3 j0 _/ y7 J: }
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1 b& y _7 W2 ^int poll_keyboard(int keyboard) . K2 p0 ?$ R8 Q( ^& Q
{
5 ~; d# m7 ]$ W' @unsigned char buf[5];$ i" R2 W: c( a4 w; W2 f
int n;$ k6 H4 k& {! q0 e( i/ }) e3 K8 j
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int kc = 0;
: T- R- e5 v8 \. y4 [8 L0 A8 yint i = 0;4 J+ x0 k7 [* a. N0 q6 Z/ ^+ r# V: X, w9 L
int s = 0;
; Q& `* G# Q" f* o4 dn = read(keyboard, &buf, sizeof(buf));
7 p: E& K$ L) m5 `7 K) |while( i < n){; v: {# |' k) d( ~% m! x
s = (buf & 0x80) ? 0:1;
/ R2 h u3 c. ?4 h5 xs = s << 8;
" C. ]% [" ?5 O5 {2 G* {if((i + 2) < n && (buf & 0x7F) == 0 && ( buf[i+1] & 0x80) != 0 && (buf[i+2] & 0x80) != 0){. p9 d s. Z; v
kc = ((buf[i+1] & 0x7F ) << 7 ) |(buf[i+2] & 0x7F);! u' G, n/ I* @/ ^: o7 [. i& B
i += 3;4 h1 m! `6 O- `* H9 s1 |5 Z( E
}
' X4 f' r0 ~$ j" Zelse{
; O; S' J, w- s' K: Hkc = buf & 0x7F;
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}
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" ?; f& h/ v! s" s: ]7 |kc = s | kc;
! j* y! ]0 N8 l/ I$ o' \$ a; creturn kc; 1 V2 @+ S' ]9 x( X. P D ^8 l
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