Integer to Bit Converter

Map vector of integers to vector of bits

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  • Library:

  • Communications Toolbox / Utility Blocks

  • Integer to Bit Converter block

Description

The Integer to Bit Converter block maps each integer (or fixed-point value) in the input vector to a group of bits in the output vector.

This block is single-rate and single-channel. The block maps each integer value (or stored integer when you use a fixed point input) to a group of M bits, using the selection for the Output bit order to determine the most significant bit. The resulting output vector length is M times the input vector length.

Ports

Input

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Input signal, specified as an integer or a length N column vector of integers.

If M is specified by the Number of bits per integer(M) parameter:

  • When the Number of bits per integer parameter is set to Unsigned, input values must be integers in the range [0, (2M – 1)].

  • When the Number of bits per integer parameter is set to Signed, input values must be integers in the range [(–2M-1), (2M – 1 – 1)].

During simulation, the block performs a run-time check and issues an error if any input value is outside of the appropriate range. When the block generates code, it does not perform this run-time check.

Data Types: double

Output

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Output signal, returned as a scalar or column vector of bits of length M·N.

Parameters

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Number of input bits mapped to each integer in the input, specified as an integer in the range [1, 32].

Indicate if the integer value input ranges should be treated as signed or unsigned.

Define whether the first bit of the output signal is the most significant bit (MSB) or the least significant bit (LSB).

Specify the data type of the output bits. You can choose one of the following Output data type options:

  • Inherit via internal rule –– The block determines the output data type based on the input data type.

    • If the input signal is floating-point (either single or double), the output data type is the same as the input data type.

    • If the input data type is not floating-point, the output data type is determined as if the parameter is set to Smallest integer.

  • Smallest integer ––The block selects the output data type based on settings used in the Hardware Implementation Pane (Simulink) of the Configuration Parameters dialog box.

    • If you select ASIC/FPGA for the device vendor, the output data type is the ideal one-bit size (ufix1).

    • For all other device vendor selections, the output data type is an unsigned integer with the smallest available word length, as defined in the Hardware Implementation settings (for example, uint8)

  • Same as input

  • double

  • single

  • uint8

  • uint16

  • uint32

Model Examples

Fixed-Point Integer To Bit and Bit To Integer Conversion (Audio Scrambling and Descrambling Example)

Fixed-Point Integer To Bit and Bit To Integer Conversion (Audio Scrambling and Descrambling Example)

Illustrates how to use the Bit to Integer Converter and Integer to Bit Converter blocks with fixed-point signals in Simulink®.

Block Characteristics

Data Types

Boolean | double | fixed point[a] | integer | single

Multidimensional Signals

no

Variable-Size Signals

yes

[a] ufix(1) only at the output when ASIC/FPGA is selected in the Hardware Implementation Pane.

Extended Capabilities

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

See Also

Blocks

Functions

Introduced before R2006a

Communications Toolbox Documentation

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