Initial commit

owDeviceFamily1D.cs

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+using System;
+
+namespace OneWireAPI
+{
+	public class owDeviceFamily1D : owDevice
+	{
+		#region Constructor
+
+		public owDeviceFamily1D(owSession Session, short[] ID) : base(Session, ID)
+		{
+			// Just call the base constructor
+		}
+
+		#endregion
+
+		#region Methods
+
+		public uint GetCounter(int CounterPage)
+		{
+			short		nResult;								// Result of method calls
+			byte[]		aData				= new byte[30];		// Data buffer to send over the network
+			short		nDataCount			= 0;				// How many bytes of data to send
+			int			iLastByte;								// Address of the last byte in the requested page
+			uint		iCounter			= 0;				// Counter value
+			int			iCRCResult;								// Result of the CRC calculation
+			int			iMatchCRC;								// CRC retrieved from the device
+
+			// Select and access the ID of the device we want to talk to
+			owAdapter.Select(_deviceID);
+
+			// Set the "read memory and counter" command into the data array
+			aData[nDataCount++] = 0xA5;
+
+			// Calculate the position of the last byte in the page
+			iLastByte = (CounterPage << 5) + 31;
+
+			// Copy the lower byte of the last byte into the data array
+			aData[nDataCount++] = (byte) (iLastByte & 0xFF);
+
+			// Copy the upper byte of the last byte into the data array
+			aData[nDataCount++] = (byte) (iLastByte >> 8);
+
+			// Add byte for the data byate, counter, zero bits, and CRC16 result
+			for (int i = 0; i < 11; i++)	aData[nDataCount++] = 0xFF;
+
+			// Send the block of data to the device
+			nResult = owAdapter.SendBlock(aData, nDataCount);
+
+			// Calculate the CRC based on the data
+			iCRCResult = owCRC16.Calculate(aData, 0, 11);
+
+			// Assemble the CRC provided by the device
+			iMatchCRC = aData[13] << 8;
+			iMatchCRC |= aData[12];
+			iMatchCRC ^= 0xFFFF;
+
+			// Make sure the CRC values match
+			if (iCRCResult != iMatchCRC)
+			{
+				// Throw a CRC exception
+				throw new owException(owException.owExceptionFunction.CRC, _deviceID);
+			}
+
+			// Assemble the counter data from the bytes retrieved
+			for (int i = nDataCount - 7; i >= nDataCount - 10; i--)
+			{
+				iCounter <<= 8;
+				iCounter |= aData[i];
+			}
+
+			return iCounter;
+		}
+
+		#endregion
+	}
+}