Basic keyboard functions. More...

Functions
int	key_empty ()
	Check whether key buffer is empty.

int	key_push (int k1)
	Push key at the end of key buffer.

int	key_tail ()
	Check for key in key buffer.

int	key_pop ()
	Remove and return next key from key buffer.

void	key_pop_all ()
	Remove all keys from key buffer.

int	key_to_nr (int key)
	Returns corresponding number for key code `key`.

int	sys_last_key ()
	Returns currently pressed key code.

void	wait_for_key_press ()
	Wait for key press.

void	wait_for_key_release (int tout)
	Wait for key release or timeout.

Detailed Description

Basic keyboard functions.

Function Documentation

◆ key_empty()

int key_empty ( )

Check whether key buffer is empty.

Returns: (0/1) 1 = Key buffer empty

◆ key_pop()

int key_pop ( )

Remove and return next key from key buffer.

Returns: Next key in key buffer or -1 if buffer is empty

◆ key_push()

int key_push ( int k1 )

Push key at the end of key buffer.

Parameters

k1	Key to store

Returns: (0/1) 1 = success, 0 = buffer full

◆ key_tail()

int key_tail ( )

Check for key in key buffer.

Returns: Next key in key buffer or -1 if buffer is empty

◆ key_to_nr()

int key_to_nr ( int key )

Returns corresponding number for key code key.

Returns: 0-9 if key corresponds to KEY_0 .. KEY_9 (respectively) or -1 if key isn't a number key

◆ sys_last_key()

int sys_last_key ( )

Returns currently pressed key code.

Returns: Currently pressed key code or 0 if no key is pressed

◆ wait_for_key_press()

void wait_for_key_press ( )

Wait for key press.

First waits for key release, then for key press and release.

Function also exits if the key isn't pressed after AUTO_OFF_MENU timeout.

◆ wait_for_key_release()

void wait_for_key_release ( int tout )

Wait for key release or timeout.