Showing content from http://technical.swissmicros.com/dmcp/doc/DMCP-ifc-html/group__kbd__basic.html below:
DMCP interface: Basic functions
Basic keyboard functions. More...
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.
Basic keyboard functions.
◆ key_empty()
Check whether key buffer is empty.
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Returns
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(0/1) 1 = Key buffer empty
◆ key_pop()
Remove and return next key from key buffer.
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Returns
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Next key in key buffer or -1 if buffer is empty
◆ key_push()
Push key at the end of key buffer.
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Parameters
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Returns
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(0/1) 1 = success, 0 = buffer full
◆ key_tail()
Check for key in key buffer.
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Returns
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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.
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Returns
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0-9 if
key corresponds to KEY_0 .. KEY_9 (respectively) or -1 if key isn't a number key
◆ sys_last_key()
Returns currently pressed key code.
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Returns
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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.
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Parameters
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tout [1/100s] Timeout or 0 to wait until key is released.
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