/// <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>
/// Handler for Click event of bttnConnection
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void bttnConnection_Click(object sender, EventArgs e)
{
if (ProtocolHandler == null || !ProtocolHandler.Connected)
{
// ProtocolHandler not initalized or disconnected
Configuration config = new Configuration()
{
PortName = cmbPorts.SelectedItem.ToString(),
BaudRate = baudrates[cmbBaud.SelectedItem.ToString()],
IsServer = chkMaster.Checked,
};
// Init new instance of application layer
ProtocolHandler = new ApplicationLayer(config);
// Try to connect to bus
if (!ProtocolHandler.Connect())
{
MessageBox.Show("Error during connection, try again.");
return;
}
// If app is client, register handler for notifications
if (!ProtocolHandler.IsServer)
{
ProtocolHandler.OnApplicationUpdate += ProtocolHandler_OnApplicationUpdate;
}
// Register trackbar address
ProtocolHandler.RegisterAddress('A');
// Register button address
ProtocolHandler.RegisterAddress('D');
if (ProtocolHandler.IsServer)
{
// Start service if instance is server
ProtocolHandler.ServerStartService();
}
// Update controls
bttnConnection.Text = "Disconnect";
grpData.Enabled = true;
cmbPorts.Enabled = false;
cmbBaud.Enabled = false;
chkMaster.Enabled = false;
}
else
{
if (ProtocolHandler.IsServer)
{
// Start service if instance is server
ProtocolHandler.ServerStopService();
}
// Disconnect from bus
ProtocolHandler.Disconnect();
// Update controls
bttnConnection.Text = "Connect";
grpData.Enabled = false;
cmbPorts.Enabled = true;
cmbBaud.Enabled = true;
chkMaster.Enabled = true;
}
}
