UDP Receive

Receive data over UDP network from remote host

Add-On Required: This feature requires the Simulink Support Package for Android Devices add-on.

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Libraries:
Simulink Support Package for Android Devices / Communication

Description

Use the UDP Receive block to receive user datagram protocol (UDP) data from a remote host. The block reads available UDP data from the socket buffer and outputs the data as a vector.

Ports

Output

Data — UDP data received

numeric vector

UDP data received from a remote host, returned as a numeric vector. Set the data type of this output by using the Data type parameter.

If you simulate a model containing the UDP Receive block on your host computer in normal mode, then the Data port outputs a zero for each step of the simulation when no UDP packets are available. As a free-running application with a shorter period than the real-time application running on the Android^® device, many zeros can be produced from the output port Data. In other words, the free-running simulation outputs zeros while waiting for the slower real-time application on the Android device to send data.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32

Size — Size of received UDP packet

nonegative scalar

Size of received UDP packet, returned as a nonnegative scalar. While the block waits for new data to arrive, this port outputs a 0. When new data arrives, this port value changes to the length of the received UDP packet.

Data Types: uint16

Parameters

Local IP port — IP port number of local device

25000 (default) | integer from 1 to 65,535

Specify the IP port number of the local device. The local device is the iOS device that is running the model.

Data type — Data type of output UDP packet

uint8 (default) | uint16 | unit32 | int8 | int16 | int32 | single | double

Set the data type of the vector elements in the output. Match this data type with the data input used to create the UDP packets.

Data size (N) — Size of output UDP packet

255 (default) | positive integer

Specify the number of data elements in each UDP packet. Match the data size used to create the UDP packets.

Sample time — Sample time

0.01 (default) | nonnegative scalar

Specify how often this block reads the port buffer. Enter a value greater than zero.

Note

Smaller values for Sample time require the processor to complete the same number of instructions in less time, which can cause task overruns.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2014a