/// <summary>
/// Reads pin state and updates the stored states.
/// </summary>
public void ReadPin()
{
prevState = state; // Update previous state
state = pinInterface.ReadState(); // Update current state
isChanged = (prevState != state) ? true : false; // Check if changed
return;
}
//------------------------------------ Public Methods -----------------------------------//
/// <summary>
/// Checks if the indicated column is empty.
/// </summary>
/// <param name="columnID">Column ID, specified when the monitor was constructed.</param>
/// <returns>true if column is empty, false o/w</returns>
public bool IsEmpty(int columnID)
{
int index = this.FindIndex(columnID); // Find column ID
GPIOController.State state = this.pins[index].state; // Get state
return((state == GPIOController.State.High) ? true : false); // High = empty
}
/// <summary>
/// Sets up an input pin.
/// </summary>
/// <param name="pin">GPIO pin</param>
/// <param name="id">Unique signal identifier</param>
public InputPin(GPIOController.Pin pin, T id)
{
this.id = id; // Set ID
this.state = GPIOController.State.Low; // Default states to Low
this.prevState = GPIOController.State.Low;
this.isChanged = false;
this.pinInterface = new GPIOController(pin, GPIOController.Direction.In); // Set up for reading
}
//------------------------------------ Public Methods -----------------------------------//
// None
//---------------------------------- Protected Methods ----------------------------------//
/// <summary>
/// Sets up a pin writing controller for the indicated GPIO pins
/// </summary>
/// <param name="pinNumbers">GPIO pin IDs to control</param>
/// <param name="pinIDs">ID values assigned to the pins; independent of pinNumbers</param>
protected void SetupPins(GPIOController.Pin[] pinNumbers, T[] pinIDs, GPIOController.State initialState)
{
if (pinNumbers.Length != pinIDs.Length)
{
throw new Exception("The number of pins and number of pin IDs should be the same");
}
this.pinCount = pinNumbers.Length; // Get # pins
this.pins = new OutputPin <T> [this.pinCount]; // Resize pin array
// Set up each pin
for (int i = 0; i < this.pinCount; i++)
{
this.pins[i] = new OutputPin <T>(pinNumbers[i], pinIDs[i], initialState);
}
return;
}
/// <summary>
/// Sets up an output pin.
/// </summary>
/// <param name="pin">GPIO pin</param>
/// <param name="id">Unique signal identifier</param>
public OutputPin(GPIOController.Pin pin, T id, GPIOController.State initialState)
{
this.id = id; // Set ID
this.pinInterface = new GPIOController(pin, GPIOController.Direction.Out, initialState); // Set up for writing
}
