public static void Main()
{
Console.WriteLine("Starting keypad driver...");
// setup keypad driver
// using 0x20 as the default PCF8574 address
// assuming this is connected to a 4x4 keypad
var keypad = new Keypad(
0x20,
"I2C2",
GpioController.GetDefault().OpenStm32Pin('F', 9),
4,
4);
// set event handlers
keypad.KeyPressed += Keypad_KeyPressed;
keypad.KeyReleased += Keypad_KeyReleased;
//define example key map and set
//this mapping works if you look keypad from back side
char[][] Keys = new char[][] {
new char[] { '1', '4', '7', '*' },
new char[] { '2', '5', '8', '0' },
new char[] { '3', '6', '9', '#' },
new char[] { 'A', 'B', 'C', 'D' }
};
keypad.KeyMap = Keys;
// enable key press handling
keypad.EnableKeyPress();
Thread.Sleep(Timeout.Infinite);
}
