Byte Unpack

Convert uint8 vector to input signals

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Libraries:
Embedded Coder / Embedded Targets / Host Communication

Description

The Byte Unpack block receives a uint8 vector and converts the vector to output signals of different Simulink^® data types based on content of the input vector. You can use block parameters to specify dimensions and data types of the output signals and the alignment of the data in the individual vectors that the block outputs. Because the UDP protocol transmits data in uint8 format, you can use this block to reformat data that is received as a UDP packet for use in a model by connecting the input of this block to the output of a UDP Send block.

Ports

Input

Port_1 — Signal to convert

vector

Input vector of uint8.

Data Types: uint8

Output

Port_1 — Converted signal data

signal of type double (default) | array of signal data

Array of input signals of one or more data types.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Parameters

Output port dimensions (cell array) — Dimensions of block output signals

{[1]} (default) | cell array of data dimension specifications

Specify the dimensions of the output signals that the block outputs in a cell array. Each element in the array specifies the dimension that the MATLAB^® size function returns for the corresponding signal. Specify dimensions that align with data converted by the corresponding Byte Pack block in the model.

For example, assume the corresponding Byte Pack block specifies these input port data types:

 {'uint32','uint32','uint16','double','uint8','double','single'}

To specify scalar and matrix output, you might set the Output port dimensions (cell array) parameter to:

 {1,1,[2,4],[4,4],[2,2],1,[3,3]}

To apply the same dimension across the output signals, you can specify one dimension value.

Output port data types (cell array) — Data types of block output signals

{'double'} (default) | cell array of Simulink data types

Specify the Simulink data types of the individual input signals received by the corresponding Byte Pack block in the model in a cell array.

For example, if the corresponding Byte Pack block specifies these input port data types, specify the same cell array for this parameter.

 {'uint32','uint32','uint16','double','uint8','double','single'}

To apply the same data type to each output signal, you need to specify the data type only once.

Byte Alignment — Byte boundary for data type alignment

1 (default) | 2 | 4 | 8

Specify how to align the data types of output data to form the uint8 vector input in bytes. Specify the alignment value that matches the value specified for the corresponding Byte Pack block in the model.

For example, if the corresponding Byte Pack block sets the byte alignment to 2, set this parameter to 2.

Version History

Introduced in R2011a