ABL electronic PIC Microcontrollers PIC16 - Manual (Page 202)

mikroC - C Compiler for Microchip PIC microcontrollers
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Prototype unsigned Keypad_Released(void);
Returns 1..16, depending on the key.
Description Call to
Keypad_Released
is a blocking call: function waits until any key is pressed
and released. When released, function returns 1 to 16, depending on the key.
Requires Port needs to be appropriately initialized; see
Keypad_Init
.
Example kp = Keypad_Released();
Keypad_Released