/// <summary>
/// Issues a set data message to the device.
/// </summary>
/// <param name="targetPath"></param>
/// <param name="sourcePath"></param>
/// <param name="data"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task SendSetData(RnetPath targetPath, RnetPath sourcePath, byte[] data, CancellationToken cancellationToken)
{
Contract.Requires(data != null);
Contract.Requires(data.Length <= 1024);
// only one writer at a time
using (await send.LockAsync(cancellationToken))
{
// number of packets to send
int c = data.Length / 16;
if (data.Length % 16 > 0)
c++;
// send until all data sent
for (int i = 0; i < c; i++)
{
// length of packet (remainder of data, max 16)
var r = data.Length - i * 16;
var l = r % 16 > 0 ? r % 16 : 16;
var d = new byte[l];
Array.Copy(data, i * 16, d, 0, l);
// set data must wait for a handshake
using (await handshake.EnterAsync(cancellationToken))
{
handshakeMessage = null;
// send set data packet
await Bus.Client.Send(new RnetSetDataMessage(
DeviceId,
Bus.LocalDevice.DeviceId,
targetPath,
sourcePath,
(byte)i,
(byte)c,
new RnetData(d)));
// wait for handshake
while (handshakeMessage == null)
await handshake.WaitAsync(cancellationToken);
}
}
}
}
/// <summary>
/// Issues an event message to the device.
/// </summary>
/// <param name="path"></param>
/// <param name="evt"></param>
/// <param name="timestamp"></param>
/// <param name="data"></param>
/// <returns></returns>
public async Task SendEvent(RnetPath path, RnetEvent evt, ushort timestamp, ushort data, RnetPriority priority, CancellationToken cancellationToken)
{
using (await send.LockAsync(cancellationToken))
using (await handshake.EnterAsync(cancellationToken))
{
handshakeMessage = null;
// send set data packet
await Bus.Client.Send(new RnetEventMessage(
DeviceId,
Bus.LocalDevice.DeviceId,
path,
RnetPath.Empty,
evt,
timestamp,
data,
priority));
// wait for handshake
if (priority == RnetPriority.High)
while (handshakeMessage == null)
await handshake.WaitAsync(cancellationToken);
}
}
/// <summary>
/// Device has sent us a handshake message.
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
async Task ReceiveHandshakeMessage(RnetHandshakeMessage message)
{
Contract.Requires<ArgumentNullException>(message != null);
using (await handshake.EnterAsync())
{
handshakeMessage = message;
handshake.PulseAll();
}
}
