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发表于 2009-9-1 16:31:15
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#include <stdio.h>
1 D6 {- x3 y M# O8 F#include <string.h>
/ [! p! }4 u( h( b+ Q0 }, y5 l#include <errno.h> ! A* {# g/ I( Q' z. i
#include <unistd.h>
3 e1 Q- T& y! ]4 q6 q0 k9 ^1 m#include <fcntl.h>
( L( r, N( U/ C$ [! N#include <linux/kd.h>
3 G, L/ n5 S" s#include <linux/keyboard.h> ! E4 U; f/ F# a' E. w- t+ ]
#include <termios.h>1 \, [* Y+ c6 C" X
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#define KEY_DOWN 0x100* x! A1 C" }2 s3 s k% a2 K
#define KEY_UP 0x000
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P7 }8 ~" O2 xint oldmode;
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# h$ y$ q: s; F6 X, [struct termios new;- X. ~- c3 z0 a& E& }
struct termios old;8 j8 a, j4 b1 a1 T( `
, N$ Q7 E- \/ O0 ?# |5 g \int get_key_input(void)
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\4 E/ G" W; E- w0 |2 K3 M3 Qint keyboard;: H4 }; ?1 s" C0 e8 p6 p* G* u
int keyboardcode;
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keyboard = init_keyboard();
0 m/ U: U. c+ A q5 Ado{
! Y5 d. M3 j' \6 c- V3 V% gkeyboardcode = poll_keyboard(keyboard); 2 a8 Z( B2 w2 Q$ ]7 [; L
if((keyboardcode != 0) && (keyboardcode & KEY_DOWN)){
4 E X) |, I( W/ Skeyboardcode = keyboardcode & 0xFF;
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}while( keyboard != 0x58);
1 y$ t# x8 j2 a% c* lexit_keyboard(keyboard);
H! h/ h5 H& [+ e& Q9 g/ Sreturn 0;( {, D- M0 O3 x/ M$ l+ X
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int exit_keyboard(int keyboard)9 \8 A. C4 e4 \
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ioctl(keyboard, KDSKBMODE, oldmode);
4 K# c# Y% Q' P. [* ztcsetattr( keyboard, 0, &old);8 p) e; i T. f
close(keyboard);
$ Y7 P5 _+ Y, J% W1 w& |return 0;) c5 p7 _$ i2 ?
}" {3 D* l }! l7 E( c
int init_keyboard(void) X0 H. P# U. L! W% s, f- T; {
{
0 r, [( L! K* n: m/ w4 s8 e2 sint keyboard;- t" f* \3 \) g1 x0 x6 L3 L C
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keyboard = open("/dev/tty", O_RDONLY);' P. k$ h0 S" u( E& Y8 h$ _
ioctl(keyboard, KDGKBMODE, &oldmode);; B7 _. V3 i* [3 m4 o
tcgetattr( keyboard, &old);# V& g8 z$ ^3 x; T
tcgetattr( keyboard, &new);, B1 S5 d6 Y8 {- z( ]$ [
5 A5 H. i7 g5 O' {8 Unew.c_lflag &= ~(ICANON | ECHO | ISIG);
. g5 b) f/ `" H3 v2 znew.c_iflag = 0;( x i8 p [, w
new.c_cc[VMIN] = 0;
5 e5 t( N: N/ Q4 H7 I2 ?' O. J/ M2 Q8 ynew.c_cc[VTIME] = 1;; r( p; I- l. Y
6 \ y' W! \5 ?6 x' gtcsetattr(keyboard, TCSAFLUSH, &new);& s) O$ j( M w6 [5 E& k
ioctl(keyboard, KDSKBMODE, K_RAW);; H7 A& S0 q# @% S% j- z; r# P9 ~* o
. i! ^& b! _7 o, _: J2 W2 Rreturn keyboard;
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int poll_keyboard(int keyboard) 7 Y3 U. f5 y3 z
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unsigned char buf[5];" |2 G8 o q; X( ~9 r& e f- V5 A% @
int n;$ W% C$ ~/ L& k2 J" X, U3 F \
6 \* v: V2 T6 A4 ]int kc = 0;
3 ~/ N3 B' h7 T- I# {8 V) Xint i = 0;1 ?4 W$ B3 V: [8 c. r" h$ {" Z
int s = 0;
' A( D* V2 Y6 F" @% u0 {n = read(keyboard, &buf, sizeof(buf)); ' H* p. v3 P2 K, [8 V! Q4 H8 Q
while( i < n){
) a; G" U. n/ N! l3 v9 O/ F& `s = (buf & 0x80) ? 0:1;
8 D t" Q2 ^! t+ u* K+ xs = s << 8;; \ m$ ?; z' k* @! ], q% `+ A
if((i + 2) < n && (buf & 0x7F) == 0 && ( buf[i+1] & 0x80) != 0 && (buf[i+2] & 0x80) != 0){. o; w0 S3 w+ {' ~1 k! X
kc = ((buf[i+1] & 0x7F ) << 7 ) |(buf[i+2] & 0x7F);5 O% z1 p# A( D& P
i += 3;
/ c$ u% a9 @3 \; f+ X; K: J}
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kc = buf & 0x7F;' ~" c2 K* B F4 i2 L: M: n5 `
i++;
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kc = s | kc;' S" d" @$ [- f" z
return kc; & K1 A- G3 {1 ]' w; u
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