/// <summary>
/// Create a new DS18B20 temperature sensor object with the specified configuration.
/// </summary>
/// <param name="oneWirePin">GPIO pin the DS18B20 is connected to.</param>
/// <param name="deviceID">Address of the DS18B20 device.</param>
/// <param name="updateInterval">Update period in milliseconds. Note that this most be greater than the conversion period for the sensor.</param>
/// <param name="temperatureChangeNotificationThreshold">Threshold for temperature changes that will generate an interrupt.</param>
public DS18B20(Cpu.Pin oneWirePin, UInt64 deviceID = 0, ushort updateInterval = MinimumPollingPeriod,
float temperatureChangeNotificationThreshold = 0.001F)
{
if (oneWirePin == Cpu.Pin.GPIO_NONE)
{
throw new ArgumentException("OneWire pin cannot be null.", nameof(oneWirePin));
}
lock (OneWireBus.Instance)
{
Sensor = OneWireBus.Add(oneWirePin);
if (Sensor.DeviceBus.TouchReset() == 0)
{
throw new Exception("Cannot find DS18B20 sensor on the OneWire interface.");
}
if (Sensor.DeviceIDs.Count == 1)
{
BusMode = BusModeType.SingleDevice;
}
else
{
if (deviceID == 0)
{
throw new ArgumentException("Device deviceID cannot be 0 on a OneWireBus with multiple devices.", nameof(deviceID));
}
BusMode = BusModeType.MultimpleDevices;
}
//
// Check for the ROM ID in the list of devices connected to the bus.
//
if (deviceID != 0)
{
bool found = false;
foreach (UInt64 id in Sensor.DeviceIDs)
{
if (id == deviceID)
{
found = true;
break;
}
}
if (!found)
{
throw new Exception("Cannot locate the specified device ID on the OneWire bus.");
}
}
}
DeviceID = deviceID;
ReadConfiguration();
if ((updateInterval != 0) && (MaximumConversionPeriod > updateInterval))
{
throw new ArgumentOutOfRangeException(nameof(updateInterval), "Temperature readings can take " + MaximumConversionPeriod + "ms at this resolution.");
}
TemperatureChangeNotificationThreshold = temperatureChangeNotificationThreshold;
_updateInterval = updateInterval;
if (updateInterval > 0)
{
StartUpdating();
}
else
{
Update();
}
}
/// <summary>
/// Create a new DS18B20 temperature sensor object with the specified configuration.
/// </summary>
/// <param name="oneWirePin">GPIO pin the DS18B20 is connected to.</param>
/// <param name="deviceID">Address of the DS18B20 device.</param>
/// <param name="updateInterval">Update period in milliseconds. Note that this most be greater than the conversion period for the sensor.</param>
/// <param name="temperatureChangeNotificationThreshold">Threshold for temperature changes that will generate an interrupt.</param>
public DS18B20(int oneWirePin, UInt64 deviceID = 0, ushort updateInterval = MinimumPollingPeriod,
float temperatureChangeNotificationThreshold = 0.001F)
{
Sensor = new GHIElectronics.TinyCLR.Devices.Onewire.OneWireController
(oneWirePin);
if (oneWirePin < 0)
{
throw new ArgumentException("OneWire pin cannot be null.", nameof(oneWirePin));
}
//lock (OneWireBus.Instance)
{
//Sensor = OneWireBus.Add(oneWirePin);
if (Sensor.TouchReset() == 0)
{
throw new Exception("Cannot find DS18B20 sensor on the OneWire interface.");
}
var oneWireDevices = Sensor.FindAllDevices();
if (oneWireDevices.Count == 1)
{
BusMode = BusModeType.SingleDevice;
}
else
{
if (deviceID == 0)
{
throw new ArgumentException("Device deviceID cannot be 0 on a OneWireBus with multiple devices.", nameof(deviceID));
}
BusMode = BusModeType.MultimpleDevices;
}
//
// Check for the ROM ID in the list of devices connected to the bus.
//
if (deviceID != 0)
{
bool found = false;
foreach (byte[] serialNumber in oneWireDevices)
{
for (int i = 0; i < serialNumber.Length; i++)
{
UInt64 id = serialNumber[i];
if (id == deviceID)
{
found = true;
break;
}
}
}
if (!found)
{
throw new Exception("Cannot locate the specified device ID on the OneWire bus.");
}
}
}
DeviceID = deviceID;
ReadConfiguration();
if ((updateInterval != 0) && (MaximumConversionPeriod > updateInterval))
{
throw new ArgumentOutOfRangeException(nameof(updateInterval), "Temperature readings can take " + MaximumConversionPeriod + "ms at this resolution.");
}
TemperatureChangeNotificationThreshold = temperatureChangeNotificationThreshold;
_updateInterval = updateInterval;
if (updateInterval > 0)
{
StartUpdating();
}
else
{
Update();
}
}
