/// <summary>
/// readButtons
/// read the state of the 5 buttons on the plate
/// returns bitmap
/// </summary>
/// <returns>byte</returns>
public byte readButtons()
{
byte reply = 0x1F;
for (byte i = 0; i < 5; i++)
{
reply &= (byte)~((byte)(MCP.digitalRead(ButtonPins[i])) << i);
}
return(reply);
}
