Atomic Transition

Performs a rate transition between arbitrary rates that guarantees data integrity.

Library

QUARC Targets/Advanced/Asynchronous

Description

The Atomic Transition block performs a rate transition from its input to its output that guarantees data integrity. The input and output rates do not have to be integer multiples of each other.

The Atomic Transition block is typically used to transition between rates in situations where Simulink's Rate Transition block cannot be used, such as with variable-size signals, or where it cannot ensure data integrity.

Multi-dimensional and variable-size signals, as well as bus signals are supported (with some restrictions). See Using Bus Objects with QUARC for more information on bus signals, and refer to Variable-Size Signals for more details on variable-size signals.

Helpful Hints

Variable-size signals

When using the Atomic Transition block with variable-size signals in subsystems, make sure any Action Port, Enable or Trigger ports are configured to propagate the sizes of variable-size signals during execution.

Input Ports

The input signal to be transitioned to another sample rate. Multi-dimensional, bus and variable-size inputs are supported as well as arbitrary data types. If a bus signal is used then the bus object must be configured in the Output data type parameter with the same bus type as the input.

Output Ports

The output signal at the rate specified in the Output sample time parameter. The data type of the output will be the same as the input.

Data Type Support

The Atomic Transition block supports signals of any datatype, including multidimensional, bus and variable-size signals. See Variable-Size Signals for more information on variable-size signals. See Using Bus Objects with QUARC for more information on bus signals.

Parameters and Dialog Box

Main Pane

The Main pane of the dialog appears as follows:

Output sample time

The sample time for the output port in seconds. The input sample time is inherited from the input signal so it does not need to be specified.

Signal Data Types Pane

The Signal Data Types pane of the dialog appears as follows:

Output data type

The data type of the output port. The data type must match the data type of the input. The default option of Inherit: Same as input ensures that the output data type matches the input data type.

Targets

See Also

• FIFO Write block

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