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/*
* File : keyboard.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://openlab.rt-thread.com/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2006-09-15 QiuYi the first version
*/
#include <rtthread.h>
#include <rthw.h>
#include <bsp.h>
#define NO 0
#define SHIFT (1 << 0)
#define CTL (1 << 1)
#define ALT (1 << 2)
#define CAPSLOCK (1<<3)
#define NUMLOCK (1<<4)
#define SCROLLOCK (1<<5)
static int shiftcode[256] =
{
[29] CTL,
[42] SHIFT,
[54] SHIFT,
[56] ALT,
};
static int togglecode[256] =
{
[58] CAPSLOCK,
[69] NUMLOCK,
[70] SCROLLOCK,
};
static char normalmap[256] =
{
NO, 033, '1', '2', '3', '4', '5', '6',
'7', '8', '9', '0', '-', '=', '\b', '\t',
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
'o', 'p', '[', ']', '\n', NO, 'a', 's',
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';',
'\'', '`', NO, '\\', 'z', 'x', 'c', 'v',
'b', 'n', 'm', ',', '.', '/', NO, '*',
NO, ' ', NO, NO, NO, NO, NO, NO,
NO, NO, NO, NO, NO, NO, NO, '7',
'8', '9', '-', '4', '5', '6', '+', '1',
'2', '3', '0', '.',
};
static char shiftmap[256] =
{
NO, 033, '!', '@', '#', '$', '%', '^',
'&', '*', '(', ')', '_', '+', '\b', '\t',
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
'O', 'P', '{', '}', '\n', NO, 'A', 'S',
'D', 'F', 'G', 'H', 'J', 'K', 'L', ';',
'"', '~', NO, '|', 'Z', 'X', 'C', 'V',
'B', 'N', 'M', '<', '>', '?', NO, '*',
NO, ' ', NO, NO, NO, NO, NO, NO,
NO, NO, NO, NO, NO, NO, NO, '7',
'8', '9', '-', '4', '5', '6', '+', '1',
'2', '3', '0', '.',
};
#define C(x) (x-'@')
static char ctlmap[256] =
{
NO, NO, NO, NO, NO, NO, NO, NO,
NO, NO, NO, NO, NO, NO, NO, NO,
C('Q'), C('W'), C('E'), C('R'), C('T'), C('Y'), C('U'), C('I'),
C('O'), C('P'), NO, NO, '\r', NO, C('A'), C('S'),
C('D'), C('F'), C('G'), C('H'), C('J'), C('K'), C('L'), NO,
NO, NO, NO, C('\\'), C('Z'), C('X'), C('C'), C('V'),
C('B'), C('N'), C('M'), NO, NO, C('/'), NO, NO,
};
static char *charcode[4] =
{
normalmap,
shiftmap,
ctlmap,
ctlmap,
};
/**
* @addtogroup QEMU
*/
/*@{*/
/**
* This function get a char from the keyboard
*/
char rt_keyboard_getc(void)
{
int c;
rt_uint8_t data;
static rt_uint32_t shift;
if ((inb(KBSTATP) & KBS_DIB) == 0)
return -1;
data = inb(KBDATAP);
if (data & 0x80)
{
/* key up */
shift &= ~shiftcode[data&~0x80];
return 0;
}
/* key down */
shift |= shiftcode[data];
shift ^= togglecode[data];
c = charcode[shift&(CTL|SHIFT)][data];
if (shift&CAPSLOCK)
{
if ('a' <= c && c <= 'z')
c += 'A' - 'a';
else if ('A' <= c && c <= 'Z')
c += 'a' - 'A';
}
return c;
}
/*@}*/
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