static int
keyboard_getchar (void)
{
u8 key;
int c;
spinlock_lock (&keyboard_lock);
retry:
key = keyboard_getkey ();
c = keycode_to_ascii (key);
if (c < 0)
goto retry;
spinlock_unlock (&keyboard_lock);
return c;
}
void keyboard_handler(regs *r){
uint8_t scancode;
KEYCODE key;
// Read the scan code only if the keyboard controller output buffer is full.
if (kybrd_ctrl_read_status() & KYBRD_CTRL_STATS_MASK_OUT_BUF) {
//read the code
scancode = keybrd_enc_read_buf();
key = scan_code[scancode];
//Check if CAPS or SHIFT or any special key is pressed
if(scancode == 0xE0 || scancode == 0xE1){}
else{
// See if this is break code. i.e Test bit 7 of the received scan code
if(scancode & 0x80){
// convert the break code into its make code equivalent. The make code
// and break codes are separated by 0x80
scancode -= 0x80;
key = scan_code[scancode];
switch(key){
case KEY_LCTRL:
case KEY_RCTRL:
_ctrl = FALSE;
break;
case KEY_LSHIFT:
case KEY_RSHIFT:
_shift = FALSE;
break;
case KEY_LALT:
case KEY_RALT:
_alt = FALSE;
break;
default:
break;
}
}
else{
//This is a make code
key = scan_code[scancode];
switch(key){
case KEY_LCTRL:
case KEY_RCTRL:
_ctrl = TRUE;
break;
case KEY_LSHIFT:
case KEY_RSHIFT:
_shift = TRUE;
break;
case KEY_LALT:
case KEY_RALT:
_alt = TRUE;
break;
// We handle only the make code for CAPSLOCK.
// Break for CAPSLOCK does not matter
case KEY_CAPSLOCK:
_caps = (_caps) ? FALSE : TRUE;
break;
default:
write_char(TEXT_COLOR,keycode_to_ascii(key));
if(reading){
//printf("calling ip buff\n");
write_io_buff(keycode_to_ascii(key));
}
break;
}
}
}
}
}
