/// <summary>
/// Shows the splash screen
/// </summary>
public static void Splash()
{
_disp.ClearDisplay();
_NetduinoLogo();
_disp.Write(" HD44780 Snake");
_disp.ChangePosition(1, 2);
_disp.Write("for ");
_disp.Write(new byte[] { 0, 1, 2, 3, 4, 5, 0, 6 }, false);
}
public static void Main()
{
// The Adafruit LCD Shield uses a MCP23017 IC as multiplex chip
Mcp23017 Mux = new Mcp23017();
// Pins 0 to 4 on the Mux-chip are connected to the buttons
IGPIPort ButtonSelect = Mux.Pins[0];
IGPIPort ButtonRight = Mux.Pins[1];
IGPIPort ButtonDown = Mux.Pins[2];
IGPIPort ButtonUp = Mux.Pins[3];
IGPIPort ButtonLeft = Mux.Pins[4];
// Enables pull-ups for all the buttons
for (int i = 0; i < 5; ++i)
{
Mux.EnablePullup(i, true);
Mux.Pins[i].InvertReadings = true;
}
// Pins 6 to 8 on the Mux-chip are for the backlight
Mux.Pins[6].Write(false); // Red backlight
Mux.Pins[7].Write(true); // Green backlight
Mux.Pins[8].Write(true); // Blue backlight
// Pins 9 to 15 are connected to the HD44780 LCD
Hd44780Lcd Display = new Hd44780Lcd(
Data: Mux.CreateParallelOut(9, 4),
ClockEnablePin: Mux.Pins[13],
ReadWritePin: Mux.Pins[14],
RegisterSelectPin: Mux.Pins[15]
);
// Pressing the Select-button will shift through these colors
bool[][] Colors = new bool[][] {
new bool[3] {
false, true, true
},
new bool[3] {
true, false, true
},
new bool[3] {
true, true, false
},
new bool[3] {
false, false, true
},
new bool[3] {
false, true, false
},
new bool[3] {
true, false, false
},
};
int ColorIndex = 0;
// Fills up the display
Display.ClearDisplay();
Display.Write("Left: ? Down: ?");
Display.ChangePosition(1, 0);
Display.Write("Right: ? Up: ?");
// Loops infinitely
bool SelectPressed = false;
while (true)
{
Display.ChangePosition(0, 7); Display.Write(ButtonLeft.Read() ? "1" : "0");
Display.ChangePosition(1, 7); Display.Write(ButtonRight.Read() ? "1" : "0");
Display.ChangePosition(0, 15); Display.Write(ButtonDown.Read() ? "1" : "0");
Display.ChangePosition(1, 15); Display.Write(ButtonUp.Read() ? "1" : "0");
// Handles the Select button
if (ButtonSelect.Read())
{
if (!SelectPressed)
{
SelectPressed = true;
++ColorIndex;
if (ColorIndex == Colors.Length)
{
ColorIndex = 0;
}
Mux.Pins[6].Write(Colors[ColorIndex][0]);
Mux.Pins[7].Write(Colors[ColorIndex][1]);
Mux.Pins[8].Write(Colors[ColorIndex][2]);
}
}
else
{
SelectPressed = false;
}
}
}