ABL electronic PIC Microcontrollers PIC16 - Manual (Page 201)

mikroC provides library for working with 4x4 keypad; routines can also be used
with 4x1, 4x2, or 4x3 keypad. Check the connection scheme at the end of the
topic.
Keypad_Init
Keypad_Read
Keypad_Released
MikroElektronika: Development tools - Books - Compilers
193
page
mikroC - C Compiler for Microchip PIC microcontrollers
mikroC
making it simple...
Keypad Library
Library Routines
Prototype void Keypad_Init(char *port);
Description Initializes
port
to work with keypad. The function needs to be called before using other
routines of the Keypad library.
Example
Keypad_Init(&PORTB);
Keypad_Init
Prototype unsigned Keypad_Read(void);
Returns 1..16, depending on the key pressed, or 0 if no key is pressed.
Description Checks if any key is pressed. Function returns 1 to 16, depending on the key pressed, or
0 if no key is pressed.
Requires Port needs to be appropriately initialized; see
Keypad_Init
.
Example kp = Keypad_Read();
Keypad_Read