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Receive net_ctrl Packet from FlightGear

Receive net_ctrl packet from FlightGear

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  • Receive net_ctrl Packet from FlightGear block

Libraries:
Aerospace Blockset / Animation / Flight Simulator Interfaces

Description

The Receive net_ctrl Packet from FlightGear block receives a network control and environment data packet, net_ctrl, from the simulation of a Simulink® model in the FlightGear simulator, or from a FlightGear session. This data packet is compatible with a particular version of FlightGear flight simulator. This block supports all signals supported by the FlightGear net_ctrl data packet. The block arranges the signals into multiple groups. The block inserts zeros for packet values that are part of inactive signal groups.

The Aerospace Blockset™ product supports FlightGear versions starting from v2.6. If you are using a FlightGear version older than 2.6, the model displays a notification from the Simulink Upgrade Advisor. Consider using the Upgrade Advisor to upgrade your FlightGear version. For more information, see Supported FlightGear Versions.

If you run a model that contains this block in Rapid Accelerator mode, the block produces zeros (0s) and it does not produce deployable code. In Accelerator mode, the block works as expected.

For details on signals and signal groups, see Output.

Examples

HL-20 Project with Optional FlightGear Interface

HL-20 Project with Optional FlightGear Interface

Model NASA HL-20 lifting body and controller modeled in Simulink and Aerospace Blockset, using FlightGear for visualization.

Ports

Output

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Controls information from FlightGear, returned as a 744-by-1 vector.

Data Types: uint8

Received FlightGear packet size, specified as a scalar.

  • 0, if no data is received

  • Size of the packet (744) in bytes.

Dependencies

This port is enabled by the Enable received flag port check box.

Data Types: double

Parameters

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Enter a valid IP address as a dot-decimal string. This IP address must be the address of the computer from which FlightGear is run, for example, 10.10.10.3.

You can also use a MATLAB expression that returns a valid IP address as a character vector. If FlightGear is run on the local computer, leave the default value of 127.0.0.1 (localhost).

To determine the source IP address, you can use one of several techniques, such as:

  • Use 127.0.0.1 for the local computer (localhost).

  • Ping another computer from a Windows® cmd.exe (or Linux® shell) prompt:

    C:\> ping andyspc

Pinging andyspc [144.213.175.92] with 32 bytes of data:

Reply from 144.213.175.92: bytes=32 time=30ms TTL=253
Reply from 144.213.175.92: bytes=32 time=20ms TTL=253
Reply from 144.213.175.92: bytes=32 time=20ms TTL=253
Reply from 144.213.175.92: bytes=32 time=20ms TTL=253

Ping statistics for 144.213.175.92:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 20ms, Maximum =  30ms, Average =  22ms

  • On a Windows machine, type ipconfig and use the returned IP address:

    H:\>ipconfig

Windows IP Configuration

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . . . . . . : 192.168.42.178
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.42.254

Programmatic Use

Block Parameter: ReceiveAddress
Type: character vector
Values: scalar
Default: '127.0.0.1'

UDP port that the block accepts data from. The sender sends data to the port specified in this parameter. This value must match the Origin port parameter of the Generate Run Script block. It must be a unique port number that no other application on the computer uses. The site, https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers, lists commonly known UDP port numbers. To identify UDP port numbers already in use on your computer, type:

netstat -a -p UDP

Programmatic Use

Block Parameter: ReceivePort
Type: character vector
Values: scalar
Default: '5505'

Specify the sample time (-1 for inherited).

Programmatic Use

Block Parameter: SampleTime
Type: character vector
Values: scalar
Default: '1/30'

Enable a received flag output port. Use this check box to determine if a FlightGear network packet has been received.

Dependencies

Selecting this check box enables the Rx bytes port.

Programmatic Use

Block Parameter: packetFlag
Type: character vector
Values:'off' | 'on'
Default: 'off'

Version History

Introduced in R2012a

See Also

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Topics

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