KeyPad-4x4-Matrix driver for RPi

Building & Compiling & Inserting

Driver

$ make
$ mknod -m 666 /dev/gpio_driver c <major_number> <minor_number>

To retrieve major and minor number, you can use $ cat /proc/devices command to find appropriate values for your environment and module.

Test example

Reading directly from nod file

$ cat /dev/gpio_driver

Driver visualisator

$ cd ./test_driver_visualisator
$ gcc keyboardVisualisator.c -o vis
$ ./vis

Driver game

$ cd ./test_driver_game
$ gcc main.c keypadMatrix.c board.c sprite.c -o game
$ ./game

Wiring RPi with 4x4 Keypad Matrix

Connect GPIO pins with Keypad Matrix in reference to:

GPIO Pin Keypad Matrix Pin 10 C0 22 C1 27 C2 17 C3

GPIO Pin Keypad Matrix Pin 18 R0 23 R1 24 R2 25 R3

Demonstration

Youtube video: https://youtu.be/xZTHvI5SSF8