/// <summary>
/// Enumerates the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>The pins.</returns>
public static IEnumerable <ProcessorPin> Enumerate(this ProcessorPins pins)
{
return(((Enum.GetValues(typeof(ProcessorPin)) as ProcessorPin[]) ?? new ProcessorPin[0])
.Distinct()
.Where(p => (pins & (ProcessorPins)((uint)1 << (int)p)) != ProcessorPins.None)
.ToArray());
}
/// <summary>
/// Reads the status of the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>
/// The pins status.
/// </returns>
public ProcessorPins Read(ProcessorPins pins)
{
var pinGroupAddress = gpioAddress + (int)(Interop.BCM2835_GPLEV0 + (uint)0 * 4);
var value = SafeReadUInt32(pinGroupAddress);
return((ProcessorPins)((uint)pins & value));
}
/// <summary>
/// Reads the status of the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>
/// The pins status.
/// </returns>
public ProcessorPins Read(ProcessorPins pins)
{
var pinGroupAddress = gpioAddress + (int)(Interop.BCM2835_GPLEV0 + (uint)0 * 4);
var value = SafeReadUInt32(pinGroupAddress);
return(ProcessorPinExtensionMethods.And(pins, value));
}
/// <summary>
/// Initializes a new instance of the <see cref="GpioConnection"/> class.
/// </summary>
/// <param name="settings">The settings.</param>
/// <param name="pins">The pins.</param>
public GpioConnection(GpioConnectionSettings settings, IEnumerable <PinConfiguration> pins)
{
this.settings = settings ?? new GpioConnectionSettings();
Pins = new ConnectedPins(this);
inputPins = new ProcessorPins(settings.PinCount);
pinRawValues = new ProcessorPins(settings.PinCount);
var pinList = pins.ToList();
pinConfigurations = pinList.ToDictionary(p => p.Pin);
namedPins = pinList.Where(p => !string.IsNullOrEmpty(p.Name)).ToDictionary(p => p.Name);
timer = Timer.Create();
timer.Interval = this.settings.PollInterval;
timer.Action = CheckInputPins;
if (this.settings.Opened)
{
Open();
}
}
/// <summary>
/// Reads the status of the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>
/// The pins status.
/// </returns>
public ProcessorPins Read(ProcessorPins pins)
{
return(pins.Enumerate()
.Select(p => Read(p) ? (ProcessorPins)((uint)1 << (int)p) : ProcessorPins.None)
.Aggregate(
ProcessorPins.None,
(a, p) => a | p));
}
/// <summary>
/// Reads the status of the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>
/// The pins status.
/// </returns>
public ProcessorPins Read(ProcessorPins pins)
{
var result = new ProcessorPins(pins.Count);
foreach (var p in pins.Enumerate())
{
result.Set(p, Read((ProcessorPin)p));
}
return(result);
}
/// <summary>
/// </summary>
public ProcessorPins Read(ProcessorPins pins)
{
// TODO: implement on $KE,RD,ALL
var result = new ProcessorPins(pins.Count);
foreach (var p in pins.Enumerate())
{
result.Set(p, Read((ProcessorPin)p));
}
return(result);
}
/// <summary>
/// Logical AND opertion on pins with int
/// </summary>
public static ProcessorPins And(ProcessorPins pins, uint value)
{
var result = new ProcessorPins(32);
foreach (var p in pins.Enumerate())
{
var val = ((uint)(1 << (int)p) & value);
result.Set(p, val > 0 ? true : false);
}
return(result);
}
private void Allocate(PinConfiguration configuration)
{
if (configuration.StatusChangedAction != null)
{
var handler = new EventHandler <PinStatusEventArgs>((sender, args) =>
{
if (args.Configuration == configuration)
{
configuration.StatusChangedAction(args.Enabled);
}
});
pinEvents[configuration.Pin] = handler;
PinStatusChanged += handler;
}
Driver.Allocate(configuration.Pin, configuration.Direction);
var outputConfiguration = configuration as OutputPinConfiguration;
if (outputConfiguration != null)
{
this[configuration.Pin] = outputConfiguration.Enabled;
}
else
{
var inputConfiguration = (InputPinConfiguration)configuration;
var pinValue = Driver.Read(inputConfiguration.Pin);
var pin = (ProcessorPins)((uint)1 << (int)inputConfiguration.Pin);
inputPins = inputPins | pin;
pinRawValues = Driver.Read(inputPins);
if (inputConfiguration.Resistor != PinResistor.None)
{
Driver.SetPinResistor(inputConfiguration.Pin, inputConfiguration.Resistor);
}
var switchConfiguration = inputConfiguration as SwitchInputPinConfiguration;
if (switchConfiguration != null)
{
pinValues[inputConfiguration.Pin] = switchConfiguration.Enabled;
OnPinStatusChanged(new PinStatusEventArgs {
Configuration = inputConfiguration, Enabled = pinValues[inputConfiguration.Pin]
});
}
else
{
pinValues[inputConfiguration.Pin] = inputConfiguration.GetEffective(pinValue);
OnPinStatusChanged(new PinStatusEventArgs {
Configuration = inputConfiguration, Enabled = pinValues[inputConfiguration.Pin]
});
}
}
}
private void CheckInputPins()
{
var newPinValues = Driver.Read(inputPins);
var changes = newPinValues ^ pinRawValues;
if (changes == ProcessorPins.None)
{
return;
}
var notifiedConfigurations = new List <PinConfiguration>();
foreach (var np in changes.Enumerate())
{
var processorPin = (ProcessorPins)((uint)1 << (int)np);
var oldPinValue = (pinRawValues & processorPin) != ProcessorPins.None;
var newPinValue = (newPinValues & processorPin) != ProcessorPins.None;
if (oldPinValue != newPinValue)
{
var pin = (InputPinConfiguration)pinConfigurations[np];
var switchPin = pin as SwitchInputPinConfiguration;
if (switchPin != null)
{
if (pin.GetEffective(newPinValue))
{
pinValues[np] = !pinValues[np];
notifiedConfigurations.Add(pin);
}
}
else
{
pinValues[np] = pin.GetEffective(newPinValue);
notifiedConfigurations.Add(pin);
}
}
}
pinRawValues = newPinValues;
// Only fires events once all states have been modified.
foreach (var pin in notifiedConfigurations)
{
OnPinStatusChanged(new PinStatusEventArgs {
Configuration = pin, Enabled = pinValues[pin.Pin]
});
}
}
/// <summary>
/// Clears pin attached to this connection.
/// </summary>
public void Clear()
{
lock (pinConfigurations)
{
foreach (var pinConfiguration in pinConfigurations.Values)
{
Release(pinConfiguration);
}
pinConfigurations.Clear();
namedPins.Clear();
pinValues.Clear();
pinRawValues = ProcessorPins.None;
inputPins = ProcessorPins.None;
}
}
/// <summary>
/// Removes the specified pin.
/// </summary>
/// <param name="configuration">The pin configuration.</param>
public void Remove(PinConfiguration configuration)
{
lock (pinConfigurations)
{
lock (timer)
{
if (IsOpened)
{
Release(configuration);
}
}
pinConfigurations.Remove(configuration.Pin);
if (!string.IsNullOrEmpty(configuration.Name))
{
namedPins.Remove(configuration.Name);
}
pinValues.Remove(configuration.Pin);
var pin = (ProcessorPins)((uint)1 << (int)configuration.Pin);
inputPins = inputPins & ~pin;
pinRawValues = pinRawValues & ~pin;
}
}
/// <summary>
/// Reads the status of the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>
/// The pins status.
/// </returns>
public ProcessorPins Read(ProcessorPins pins)
{
var value = Interop.bcm2835_gpioperi_read(0);
return((ProcessorPins)((uint)pins & value));
}
/// <summary>
/// Enumerates the specified pins.
/// </summary>
/// <param name="pins">The pins.</param>
/// <returns>The pins.</returns>
public static IEnumerable <int> Enumerate(this ProcessorPins pins)
{
return(Enumerable.Range(0, pins.Count)
.Where(p => (pins.Get(p)))
.ToArray());
}
/// <summary>
/// Diff
/// </summary>
public ProcessorPins Diff(ProcessorPins pinRawValues)
{
return(new ProcessorPins(_pins.Xor(pinRawValues._pins)));
}