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#include <stdint.h>
#include "vga.h"
enum special_key {
K_ESCAPE = 0x1b,
K_BACKSPACE = 0x08,
K_F1 = 0x0E,
K_F2 = 0x0F,
K_F3 = 0x10,
K_F4 = 0x11,
K_F5 = 0x12,
K_F6 = 0x13,
K_F7 = 0x14,
K_F8 = 0x15,
K_F9 = 0x16,
K_F10 = 0x17,
K_F11 = 0x18,
K_F12 = 0x19
};
enum mod_scancodes {
SC_LSHIFT = 0x2A,
SC_RSHIFT = 0x36,
SC_LCTRL = 0x1D,
SC_LALT = 0x38,
SC_META = 0x3A
};
char keymap_unshift[] = {
0,K_ESCAPE,'1','2','3','4','5','6','7','8','9','0','-','=',K_BACKSPACE,
'\t','q','w','e','r','t','y','u','i','o','p','[',']','\n',0,
'a','s','d','f','g','h','j','k','l',';','\'','`',0,'\\',
'z','x','c','v','b','n','m',',','.','/',0,'*',0,' ',0,
K_F1,K_F2,K_F3,K_F4,K_F5,K_F6,K_F7,K_F8,K_F9,K_F10,0,0,
'7','8','9','-','4','5','6','1','2','3','0','.',0,0,0,K_F11,K_F12
};
char keymap_shift[] = {
0,K_ESCAPE,'!','@','#','$','%','^','&','*','(',')','_','+',K_BACKSPACE,
'\t','Q','W','E','R','T','Y','U','I','O','P','{','}','\n',0,
'A','S','D','F','G','H','J','K','L',':','"','~',0,'|',
'Z','X','C','V','B','N','M','<','>','?',0,'*',0,' ',0,
K_F1,K_F2,K_F3,K_F4,K_F5,K_F6,K_F7,K_F8,K_F9,K_F10,0,0,
'7','8','9','-','4','5','6','1','2','3','0','.',0,0,0,K_F11,K_F12
};
char *keymap = keymap_unshift;
struct {
int shift;
int ctrl;
int alt;
int meta;
} mod_keys = {0};
void keydown(char c) {
vputchar(c);
}
void keyup(char c) {
}
void process_scancode(uint8_t c) {
uint8_t code;
int release;
if (c > 0x80 && c <= 0xD8) {
release = 1;
code = c - 0x80;
} else {
release = 0;
code = c;
}
switch (code) {
default:
if (code <= 0x58 && keymap[code] != 0) {
if (!release)
keydown(keymap[code]);
else
keyup(keymap[code]);
}
break;
case SC_LSHIFT:
case SC_RSHIFT:
mod_keys.shift = !release;
keymap = release ? keymap_unshift : keymap_shift;
break;
case SC_LCTRL:
mod_keys.ctrl = !release;
break;
case SC_LALT:
mod_keys.alt = !release;
break;
case SC_META:
mod_keys.meta = !release;
break;
}
}
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