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发表于 2009-9-1 16:31:15
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#include <stdio.h>
# {9 V* _; l$ X6 {. X8 e#include <string.h> & ^0 h7 Z) b4 R7 K5 z+ e1 _
#include <errno.h> $ A3 n* B( z1 u5 M I2 K& c1 x
#include <unistd.h> / ]. W1 m B& S" a3 h4 m* B& s
#include <fcntl.h>
, i+ z8 x' S" d: j4 `" h& a#include <linux/kd.h>
) I- u/ G& d4 K( g* x#include <linux/keyboard.h>
; t3 z; o6 Z/ y) D; d! J#include <termios.h>
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#define KEY_DOWN 0x100
: |1 q& m) K& f" |#define KEY_UP 0x000
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int oldmode;
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# J7 |' y( X3 j7 z+ l! S- n9 dstruct termios new;1 g: s6 t: h9 N! e+ ?3 @
struct termios old;3 c- Y" [$ ^6 \# \+ Y5 g
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int get_key_input(void), K3 W) { C7 n2 `6 }) z1 @3 G
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int keyboard;
5 E$ y9 `5 {! } ?4 a/ K- Eint keyboardcode;
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8 \' U' `9 |! r+ n, N5 Fkeyboard = init_keyboard();
6 a& ~ [% n0 U5 m, s, b* Kdo{: |! B. C5 a1 e% c/ Q6 a
keyboardcode = poll_keyboard(keyboard);
1 {) D% i' Z; M% S7 X4 Xif((keyboardcode != 0) && (keyboardcode & KEY_DOWN)){ 3 h7 }+ u, Z; W$ n$ J
keyboardcode = keyboardcode & 0xFF;
1 h+ K3 p1 O+ A: C$ Y5 Q//
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' `9 i" x. W6 C- j- S( g' K: H}while( keyboard != 0x58); 9 Z, J. Y; _, n8 R% S6 I
exit_keyboard(keyboard);
/ V) H0 }, S; L2 t6 ereturn 0;* M/ G, G/ o/ z" Q: M* L
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2 _* W. W7 x9 z. m; p% u/ oint exit_keyboard(int keyboard)
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, F9 U- o- h( ]; Y; D; r2 eioctl(keyboard, KDSKBMODE, oldmode);
& z# s9 ^8 M4 q* B) Y& V1 Ttcsetattr( keyboard, 0, &old);
! b, Y+ D9 O% r5 k" gclose(keyboard);$ Y0 y7 e# Q/ J9 t" m; T: H6 W
return 0;
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int init_keyboard(void)5 a1 v" ]- t* z3 T2 q# K$ E( |2 ]
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int keyboard;
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keyboard = open("/dev/tty", O_RDONLY);
0 }, x4 |* J1 V: ?5 V9 A# kioctl(keyboard, KDGKBMODE, &oldmode);
* t- q8 n, H5 L2 O3 e6 ptcgetattr( keyboard, &old);% x+ n! G2 O1 i
tcgetattr( keyboard, &new);' m5 h' R6 ~. a0 o1 t/ |9 C2 ~
7 H F* f) u i- c7 S+ [* tnew.c_lflag &= ~(ICANON | ECHO | ISIG); % [, G: L! X& Q! r4 J
new.c_iflag = 0;' p' E$ M I8 T: T3 b6 O
new.c_cc[VMIN] = 0;
5 ?2 [& r p5 C" K+ unew.c_cc[VTIME] = 1;9 [, c$ P: h% K* F+ h5 n
8 K3 S' g+ g; b7 Ntcsetattr(keyboard, TCSAFLUSH, &new);
" b- X. Y" w1 d" t# V' E" {% ]ioctl(keyboard, KDSKBMODE, K_RAW);: C& \2 i8 v' K
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return keyboard;
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int poll_keyboard(int keyboard) 3 c4 Q& i2 C( g X6 i4 N+ K4 M
{
: F& q: l* l5 `unsigned char buf[5];1 p' a3 ?: M2 ]" f8 i# _. e
int n;, L3 Q4 H2 A1 @0 I1 Y/ P2 c
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int kc = 0;# a! ~ n. {4 K* E* \9 W! `- T
int i = 0;
+ Z0 r- V6 u# e8 n4 E& Lint s = 0;4 m: V& h: |# W
n = read(keyboard, &buf, sizeof(buf)); 8 j U6 Y2 z0 X' e( S. N
while( i < n){" g" b4 t. J7 Z3 v
s = (buf & 0x80) ? 0:1;
6 k0 j) T+ y1 }4 W3 L7 W. Gs = s << 8;
/ x3 h8 T; s5 Jif((i + 2) < n && (buf & 0x7F) == 0 && ( buf[i+1] & 0x80) != 0 && (buf[i+2] & 0x80) != 0){' p* D& }% v6 V
kc = ((buf[i+1] & 0x7F ) << 7 ) |(buf[i+2] & 0x7F);
/ ?+ [$ v, r7 {: K* v; ^" i$ Pi += 3;
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else{- `9 Z6 D" o* j3 l; j8 @: G' O
kc = buf & 0x7F;
/ V( O: d+ B+ W" }i++;
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}
: C; o6 [+ E/ T' t& c! rkc = s | kc;
1 [# ^9 ?& Q% X5 greturn kc; 5 _' G5 s1 l3 A; Q
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