static void Main(string[] args)
{
/*
* This example simulates a cursor keyboard.
* It's made with RB2 & 3 in mind. The pinout used is
*
*
* o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o
* x o o o o o o o o o o o o o o o o o o o o o o o o o o o o o
* 1 2 3 3 3 3 3
* 9 1 3 5 7 9
* | | | | | |
* s r l d u g
* p i e o p n
* a g f w d
* c h t n
* e t
*
* As you can see the schematics uses GND for the inputs, so we
* must configure the pull control to pull-up. Also, as we are
* using pulled up inputs the signal must be reversed, we will
* have false (or zero) on the input when the button is pressed
* and true (or one) when the button is released.
*
* Remember to execute it with root privileges!
*/
//Remember always to initialize the chip!!
BCM2835.BCM2835Managed.bcm2835_init();
//Create new pin
GPIOPin up = new GPIOPin(BCM2835.BCM2835Managed.RPiGPIOPin.RPI_V2_GPIO_P1_37);
//Configure it as input
up.Function = GPIOFunction.Input;
//Enable pull-ups
up.PullControl = GPIOPullControl.PullUp;
//Detect both edges
up.Edge = Edge.Both;
//Hook to the event detector
up.EventDetected += Up_EventDetected;
GPIOPin down = new GPIOPin(BCM2835.BCM2835Managed.RPiGPIOPin.RPI_V2_GPIO_P1_35);
down.Function = GPIOFunction.Input;
down.PullControl = GPIOPullControl.PullUp;
down.Edge = Edge.Both;
down.EventDetected += Down_EventDetected;
GPIOPin left = new GPIOPin(BCM2835.BCM2835Managed.RPiGPIOPin.RPI_V2_GPIO_P1_33);
left.Function = GPIOFunction.Input;
left.PullControl = GPIOPullControl.PullUp;
left.Edge = Edge.Both;
left.EventDetected += Left_EventDetected;
GPIOPin right = new GPIOPin(BCM2835.BCM2835Managed.RPiGPIOPin.RPI_V2_GPIO_P1_31);
right.Function = GPIOFunction.Input;
right.PullControl = GPIOPullControl.PullUp;
right.Edge = Edge.Both;
right.EventDetected += Right_EventDetected;
GPIOPin button = new GPIOPin(BCM2835.BCM2835Managed.RPiGPIOPin.RPI_V2_GPIO_P1_29);
button.Function = GPIOFunction.Input;
button.PullControl = GPIOPullControl.PullUp;
button.Edge = Edge.Both;
button.EventDetected += Button_EventDetected;
/*
* Keyb simulator is a nifty class I created to simulate a physical keyboard
* You can run it in a SSH console and the generated input will be consumed by the
* session existing on the physical machine, not by the SSH session.
*/
KeybSimulator.Init();
Console.WriteLine("Ready, press any key to exit...");
Console.ReadKey();
/*
* Very important!!
*
* Dispose always any resource which implements IDisposable
*
* In this particular case if you don't dispose the pins those would block
* the program's end as each pin uses a thread for event detection.
*
*/
up.Dispose();
down.Dispose();
left.Dispose();
right.Dispose();
button.Dispose();
BCM2835.BCM2835Managed.bcm2835_close();
}
private static void Up_EventDetected(object sender, SignalEventArgs e)
{
KeybSimulator.SetKey(LinuxKeyCodes.KEY_UP, !e.Signal);
}