I2C Read/Write Transaction for NETMF

gistfile1.cs

    int writeTransaction(byte[] data)
    {
      int tryCount = 0;
      int writtenSize = 0;
      while (writtenSize < data.Length && tryCount < MAX_TRY)
      {
        var dataForWrite = new byte[data.Length - writtenSize];
        Array.Copy(data, writtenSize, dataForWrite, 0, data.Length - writtenSize);
        var i2ctx = new I2CDevice.I2CTransaction[] {
          I2CDevice.CreateWriteTransaction(dataForWrite),
        };
        // https://msdn.microsoft.com/en-us/library/hh400235.aspx
        var writeResult = Device.Execute(i2ctx, TIMEOUT);
        writtenSize += writeResult;
        tryCount++;
      }
      return writtenSize;
    }

    int readTransaction(int requestSize, out byte[] resultData)
    {
      int tryCount = 0;
      int readSize = 0;
      var arrayBuffer = new ArrayList();
      while (readSize < requestSize && tryCount < MAX_TRY)
      {
        var dataForRead = new byte[requestSize - readSize];
        var i2ctx = new I2CDevice.I2CTransaction[] {
          I2CDevice.CreateReadTransaction(dataForRead),
        };
        // https://msdn.microsoft.com/en-us/library/hh400235.aspx
        var readResult = Device.Execute(i2ctx, TIMEOUT);
        for (int idx = 0; idx < readResult; idx++)
        {
          arrayBuffer.Add(dataForRead[idx]);
        }
        readSize += readResult;
        tryCount++;
      }
      resultData = (byte[])arrayBuffer.ToArray(typeof(byte));
      return readSize;
    }