/// <summary>
/// Handler for Elapsed event of sync timer
/// </summary>
/// <param name="sender">Timer instance that triggered this event</param>
/// <param name="e">Event arguments</param>
private void Update_timer_Elapsed(object sender, ElapsedEventArgs e)
{
UpdateTimer.Stop();
Locked = true;
// Iterate storage and sync all values
foreach (char addr in value_tracker.Keys)
{
ApplicationPdu pdu = new ApplicationPdu
{
Address = addr,
Value = value_tracker[addr]
};
ServerBroadcastValue(pdu);
}
Locked = false;
UpdateTimer.Start();
return;
}
/// <summary>
/// Event handler for OnMessageReceived event of link
/// </summary>
/// <param name="sender">Link layer instance</param>
/// <param name="msg">Event parameters</param>
private void Link_OnMessageReceived(LinkLayer sender, LinkMessage msg)
{
if (!IsServer)
{
char addr = msg.Data[0];
if (value_tracker.Keys.Contains(addr))
{
ApplicationPdu pdu = new ApplicationPdu()
{
Address = addr,
Value = Convert.ToInt32(msg.Data.Substring(1))
};
value_tracker[pdu.Address] = pdu.Value;
Debug.WriteLine("APP-ADDR:" + pdu.Address + "-VAL:" + msg.Data.Substring(1));
TriggerApplicationUpdate(pdu);
}
}
}
/// <summary>
/// Handler for application layer notifications
/// </summary>
/// <param name="sender"><c>ApplicationLayer</c> instance</param>
/// <param name="pdu">Application protocol data unit</param>
private void ProtocolHandler_OnApplicationUpdate(ApplicationLayer sender, ApplicationPdu pdu)
{
switch (pdu.Address)
{
case 'A':
// Update trackbar value
if (pdu.Value <= trckAnalog.Maximum)
{
Invoke(new Action(() =>
{
trckAnalog.Value = pdu.Value;
}));
}
break;
case 'D':
// Update button color
bool value = Convert.ToBoolean(pdu.Value);
if (value)
{
Invoke(new Action(() =>
{
bttnDigitial.BackColor = Color.Green;
}));
}
else
{
Invoke(new Action(() =>
{
bttnDigitial.BackColor = Color.Gray;
}));
}
break;
default:
break;
}
}
/// <summary>
/// Send application protocol data unit to lower layer
/// </summary>
/// <param name="pdu">Application protocol data unit to send</param>
/// <returns>true if success, false if error</returns>
private bool ServerBroadcastValue(ApplicationPdu pdu)
{
if (IsServer)
{
try
{
LinkMessage msg = new LinkMessage()
{
Data = pdu.Address + pdu.Value.ToString()
};
link.Send(msg);
}
catch
{
return(false);
}
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Method for triggering OnApplicationUpdate event
/// </summary>
/// <param name="pdu"></param>
protected virtual void TriggerApplicationUpdate(ApplicationPdu pdu)
{
OnApplicationUpdate?.Invoke(this, pdu);
}