/**
* Converts keyboard scan codes into ascii chars
* by calling scan_to_ascii and extended_scan_to_ascii.
* Keeps track of shift, caps lock etc.
*
* @param keypress the scancode.
*
* @return the corresponding character.
*/
int process_scancode(int keypress) {
int pressed = !(keypress & 0x80);
keypress &= 0x7F;
if (key_state & EXTENDED_KEY_PRESS)
return extended_scan_to_ascii(keypress, pressed);
if (keypress == 0x2A) {
/* Shift key. */
if (pressed)
key_state |= LSHIFT_KEY_ON;
else
key_state &= ~LSHIFT_KEY_ON;
return -1;
} else if (keypress == 0x36) {
/* Shift key. */
if (pressed)
key_state |= RSHIFT_KEY_ON;
else
key_state &= ~RSHIFT_KEY_ON;
return -1;
} else if (keypress == 0x1D) {
/* Left control key. */
if (pressed) key_state |= LCONTROL_KEY_ON;
else key_state &= ~LCONTROL_KEY_ON;
return -1;
} else if (keypress == 0x38) {
/* Left alt key. */
if (pressed) key_state |= LALT_KEY_ON;
else key_state &= ~LALT_KEY_ON;
return -1;
} else if (keypress == 0x3A) {
/* Caps lock. */
if (pressed) {
if (key_state & CAPS_LOCK_ON)
key_state &= ~CAPS_LOCK_ON;
else key_state |= CAPS_LOCK_ON;
}
return -1;
} else if (keypress == 0xE0) {
/* Extended key code. Set extended marker. */
key_state |= EXTENDED_KEY_PRESS;
return -1;
} else {
/* It's just a normal key. If it's a release,
we don't care about it. */
if (!pressed) return -1;
else return scan_to_ascii(keypress);
}
/* Should never be here! */
return -1;
}
extern u32 wait_input (char* buffer) {
for (int i = 0; i< 80; i++)
input_buffer[i] = 0;
input_buffer_cursor = 0;
scan_to_ascii (0,W_ENABLE);
u8 input = 0x0;
while (((input_buffer_cursor) == 0) ||
(input_buffer [(input_buffer_cursor) -1]
!= SC_ENTER))
;
scan_to_ascii (0,W_DISABLE);
/*||
// (input_buffer[input_buffer_cursor-1]
// == SC_ENTER)*/ /* wait input */
// ;// kprintf ("%c", input_buffer[input_buffer_cursor]);
memcpy (buffer, input_buffer, input_buffer_cursor-1);
buffer [input_buffer_cursor-1] = '\0';
return input_buffer_cursor -1;
}
extern void refresh_ps2_controller () {
static u8 ignore = 0;
while (((INB(I8042_COMMAND)) & 1) == 0)
;
u8 c = INB (0x60);
if (ignore) {
ignore = 0;
return;
}
if (c == 0xE0) {
ignore = 1;
return;
}
if (get_type(c) != KEYRELEASED)
return;
u8 sc = get_scan_code (c);
scan_to_ascii (sc, W_NULL);
}
