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发表于 2009-9-1 16:31:15
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#include <stdio.h>
% L$ T6 d1 H' f) G#include <string.h> ! h, r d7 J0 P6 {' c
#include <errno.h>
3 v( y) J7 \' C, ^' _#include <unistd.h>
# i/ \$ d1 ^. B. q; U2 h$ o#include <fcntl.h> H D) X) Y9 r
#include <linux/kd.h>
3 f: J9 k' R& O6 f/ r#include <linux/keyboard.h> ; M. \, R9 w' t; _8 j
#include <termios.h>
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+ v6 q% U5 q/ m- q0 O ]+ O) \#define KEY_DOWN 0x1000 J7 c' a2 [) L5 t6 N* X. Z
#define KEY_UP 0x0006 Y/ d& s# w8 n/ W6 |# p+ `
4 X* Z! O" J* l5 b; Yint oldmode;
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struct termios new;& X/ }" r# r4 _ z' H4 P2 s5 h
struct termios old;
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( x- R, D& f+ O( cint get_key_input(void)
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2 ?4 M1 }. o( |7 [4 _int keyboard;
u8 G" }+ c8 M- v% P* fint keyboardcode;
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7 ~4 V3 O$ l4 Y; X4 C; \: ]keyboard = init_keyboard();( c# H) a( ]' C" G9 \- ^
do{/ m: \1 b' U+ Q" Y/ x
keyboardcode = poll_keyboard(keyboard); / K1 m. `1 |) F* w. O% Q1 P" d
if((keyboardcode != 0) && (keyboardcode & KEY_DOWN)){ ! {0 s) R( \5 I
keyboardcode = keyboardcode & 0xFF;
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3 v5 I1 a% J: G9 Y}while( keyboard != 0x58); ( p: Q( u9 v2 n7 m" a
exit_keyboard(keyboard);
2 E$ n" U4 ?: I* B+ creturn 0;* N6 ~7 r) A' d* w" ]& P
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int exit_keyboard(int keyboard)
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3 j {$ s: e2 sioctl(keyboard, KDSKBMODE, oldmode);) X' U3 o/ ~3 ]! b( I
tcsetattr( keyboard, 0, &old);
. m. Y+ h, s2 q. u- X* ~; Eclose(keyboard);
1 K- n7 O1 J. Q6 Y6 |# nreturn 0;
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int init_keyboard(void)/ U f) |1 t3 h) D* E) k
{% A0 D+ f; N. S+ S* Y L }. d
int keyboard;
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: a( x. I2 `; m0 w( Zkeyboard = open("/dev/tty", O_RDONLY);
7 |! H: \4 O* r9 `( E1 qioctl(keyboard, KDGKBMODE, &oldmode);
( K7 {( v3 m/ f/ ]tcgetattr( keyboard, &old);5 ]' ^8 @+ K( T1 c, {4 _+ h. @
tcgetattr( keyboard, &new);
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" z- N h1 [: O: x/ L; Unew.c_lflag &= ~(ICANON | ECHO | ISIG);
0 i4 p/ ]& ^6 ynew.c_iflag = 0;. S# u! T$ C; \* T" f( a# L. J
new.c_cc[VMIN] = 0;
6 N, _, q. `3 R9 m( h8 Hnew.c_cc[VTIME] = 1;' s5 [+ D4 n4 m/ L _; E5 E
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tcsetattr(keyboard, TCSAFLUSH, &new);; ~: r6 |' A# b) \
ioctl(keyboard, KDSKBMODE, K_RAW);1 A4 p6 \% D* `3 ~
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return keyboard;
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}
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int poll_keyboard(int keyboard)
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7 S N+ z! Q) M" D* Xunsigned char buf[5];) F. _# F; n# \! C4 u r
int n;8 q7 D% I+ H0 k
$ E! K0 `( P" n) M, e7 s* Fint kc = 0;; f0 N7 |) r1 }$ U
int i = 0;0 H1 k) M$ |& e
int s = 0;, A. F8 `1 ~0 u
n = read(keyboard, &buf, sizeof(buf));
1 L, x3 v% R j% ^* Owhile( i < n){( i5 G' v- U8 `3 A- L0 M
s = (buf & 0x80) ? 0:1;
0 @; ?/ w3 v$ Q$ Zs = s << 8;3 [# n9 F* K2 o
if((i + 2) < n && (buf & 0x7F) == 0 && ( buf[i+1] & 0x80) != 0 && (buf[i+2] & 0x80) != 0){
9 M; O& C* B# E! {kc = ((buf[i+1] & 0x7F ) << 7 ) |(buf[i+2] & 0x7F);# G$ O. N- J- U; y: C* E+ M
i += 3;2 E- u6 ?4 }) c7 k6 n$ M; ^! ?
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else{- B4 F# b$ j& z5 T# A0 {1 n/ ]
kc = buf & 0x7F;
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}
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5 l0 U) f3 O! m8 l Zkc = s | kc;
9 G3 B* X0 H9 A8 J; q* xreturn kc;
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