FBC

File Bit Comparison

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Libraries:

Description

The FBC block implements the FBC instruction. The block compares the source and reference data bit by bit and stores the outcome in result.

Ports

Input

EnableIn — Enable Input

off (default) | on

This acts as the enabler for the block. The FBC block executes only when EnableIn is true.

src — Source

integer

It gives the value stored at source. This value is compared with reference. Since the block performs a bit comparison, the source is an array variable.

Data Types: int32

ref — Reference

integer

It gives the value stored at reference. This value is compared with source. Since the block performs a bit comparison, the reference is an array variable.

Data Types: int32

res — Result

integer

The result of bit comparison between source and reference is stored at Result. This is an array variable.

Data Types: int32

compareCtrl — Compare Control

structure

It is a structure consisting of length and position variables. The length variable stores the number of bits to compare. The position variable stores the current position in the source. The initial value of position variable is 0.

resultsCtrl — Results Control

structure

It is a structure consisting of length and position variables. The length variable stores the number of storage locations in the result. The position variable stores the current position in the result. The initial value of position variable is 0.

srcIndex — Source Index

scalar

Source Start Index specifies the index of the starting element in source for comparison. Typically the value of srcIndex is 0.

Data Types: int8 | int16 | int32 | single

refIndex — Reference Index

scalar

Reference Start Index specifies the index of the starting element in reference for comparison. Typically the value of refIndex is 0.

Data Types: int8 | int16 | int32 | single

resIndex — Result Index

scalar

Result Start Index specifies the index of the starting element in result for storing the result of comparison. Typically the value of resIndex is 0.

Data Types: int8 | int16 | int32 | single

Output

EnableOut — Enable Output

off (default) | on

When set, EnableOut provides the result of the block at the output. Once EnableIn is set, it automatically sets the EnableOut.

resOut — Result Output

integer

The result of comparison stored in res is available at the output port. The data can be read by connecting a variable write block at resOut.

Data Types: int32

compareOut — Compare Output

structure

The comparison operation modifies the values of position and length variable of compareCtrl. The compareCtrl structure is available at the compareOut port. The data can be read by connecting a variable write block to it.

ResultsOut — Results Output

structure

The comparison operation modifies the values of position and length variable of resultsCtrl. The resultsCtrl structure is available at the resultsOut port. The data can be read by connecting a variable write block to it.

Parameters

Sample time (-1 for inherited) — Discrete interval between sample time hits

-1 (default) | scalar

Enter the discrete interval between sample time hits or specify -1 to inherit the sample time

See also Specify Sample Time.

Programmatic Use

Block Parameter: SampleTime

Type: character vector

Value: real scalar

Default: '-1'

Version History

Introduced in R2019a