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Counter Free-Running

Count up and overflow back to zero after reaching maximum value for specified number of bits

  • Library:
  • Simulink / Sources

Description

The Counter Free-Running block counts up until reaching the maximum value, 2Nbits – 1, where Nbits is the number of bits. Then the counter overflows to zero and begins counting up again.

After overflow, the counter always initializes to zero. However, if you select the global doubles override, the Counter Free-Running block does not wrap back to zero.

Note

This block does not report wrap on overflow warnings during simulation. To report these warnings, see the Simulink.restoreDiagnostic reference page. The block does report errors due to wrap on overflow.

Ports

Output

expand all

Count value, specified as an unsigned integer of 8 bits, 16 bits, or 32 bits.

Data Types: uint8 | uint16 | uint32

Parameters

expand all

Specify the number of bits as a finite, real-valued. When you specify:

  • A positive integer, for example 8, the block counts up to 28 – 1, which is 255.

  • An unsigned integer expression, for example uint8(8), the block counts up to uint8(2uint8(8) – 1), which is 254.

Programmatic Use

Block Parameter: NumBits
Type: character vector
Values: scalar
Default: '16'

Specify the time interval between samples as a scalar (sampling period), or a two-element vector ([sampling period, initial offset]). To inherit the sample time, set this parameter to -1. For more information, see Specify Sample Time.

Programmatic Use

Block Parameter: tsamp
Type: character vector
Values: scalar | vector
Default: '-1'

Block Characteristics

Data Types

base integer | fixed point

Direct Feedthrough

No

Multidimensional Signals

No

Variable-Size Signals

No

Zero-Crossing Detection

No

Extended Capabilities

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

Fixed-Point Conversion
Convert floating-point algorithms to fixed point using Fixed-Point Designer™.

Introduced before R2006a