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