Buffers, Switches, and Counters

Change sample rate or frame rate of signals, count events, detect edges, perform actions when events occur

Convert signal rates and frame sizes in Simulink^® using frame rebuffering blocks such as the Buffer, Unbuffer, and the Delay Line blocks. Implement FIFO and LIFO buffers using the Queue, Stack blocks in Simulink, and dsp.AsyncBuffer object in MATLAB^®. You can also count events, detect edges, and perform actions when events occur using the switch and counter blocks in DSP System Toolbox™.

Objects

dsp.AsyncBuffer FIFO buffer

Functions

rebuffer_delay Number of samples of delay introduced by buffering and unbuffering operations

Blocks

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Buffers

Buffer	Buffer input sequence to smaller or larger frame size
Delay Line	Rebuffer sequence of inputs
Queue	Store inputs in FIFO register
Stack	Store inputs into LIFO register
Unbuffer	Unbuffer input frame into sequence of scalar outputs

Switches and Counters

Counter	Count up or down through specified range of numbers
Edge Detector	Detect transition from zero to nonzero value
Event-Count Comparator	Detect threshold crossing of accumulated nonzero inputs
Multiphase Clock	Generate multiple binary clock signals
N-Sample Enable	Output ones or zeros for specified number of sample times
N-Sample Switch	Switch between two inputs after specified number of sample periods

Topics

Sample- and Frame-Based Concepts
Explore basic signal concepts in the context of a Simulink model. Learn more about sample-based processing and frame-based processing.
Buffering and Frame-Based Processing
Convert signals of frame size 1 into signals of frame size greater than 1, and vice versa.
Convert Sample and Frame Rates in Simulink Using Frame Rebuffering Blocks
Learn how frame rebuffering blocks impact the sample rate and frame rate of signals in Simulink models.
Delay and Latency
Configure the Simulink environment to minimize delay and increase simulation performance.
Why Does Reading Data from the dsp.AsyncBuffer Object Give a Dimension Mismatch Error in MATLAB Function Block?
Resolve the dimension mismatch error when you read data from an Async buffer inside the MATLAB function block.
Why Does the dsp.AsyncBuffer Object Error When You Call read Before write?
Initialize the async buffer by calling either setup or write before the first call to read.