Manual Conversion

Manual floating-point algorithm to fixed-point algorithm conversion

Functions

`buildInstrumentedMex`	Generate compiled C code function including logging instrumentation
`showInstrumentationResults`	Results logged by instrumented, compiled C code function
`clearInstrumentationResults`	Clear results logged by instrumented, compiled C code function

`fi`	Construct fixed-point numeric object
`fimath`	Set fixed-point math settings
`numerictype`	Construct an `embedded.numerictype` object describing fixed-point or floating-point data type

`zeros`	Create array of all zeros with fixed-point properties
`ones`	Create array of all ones with fixed-point properties
`cast`	Cast variable to different data type
`cast64BitFiToInt`	Cast `fi` object types that can be exactly represented to a 64-bit integer data type
`cast64BitIntToFi`	Cast 64-bit integer types to an equivalent `fi` object type
`castFiToInt`	Cast fi object to equivalent integer data type
`castFiToMATLAB`	Cast `fi` object type to an equivalent built-in MATLAB data type
`castIntToFi`	Cast an integer data type to equivalent `fi` type

Examples and How To

Manually Convert a Floating-Point MATLAB Algorithm to Fixed Point

Manually convert floating-point MATLAB algorithm to fixed point.

Convert Fast Fourier Transform (FFT) to Fixed Point

This example shows how to convert a version of the Fast Fourier Transform (FFT) algorithm into fixed-point MATLAB code.

Detect Limit Cycles in Fixed-Point State-Space Systems

This example shows how to analyze a fixed-point state-space system to detect limit cycles.

Compute Quantization Error

This example shows how to compute and compare the statistics of the signal quantization error when using various rounding methods.

Concepts

Fixed-Point Conversion Workflows

Learn more about the different fixed-point conversion methods. The conversion method you use depends on your end goal and your level of fixed-point expertise.

Manual Fixed-Point Conversion Workflow

Overview of workflow for manual float-to-fixed conversion.

Manual Fixed-Point Conversion Best Practices

These best practices help you get from generic MATLAB^® code to an efficient fixed-point implementation using the manual fixed-point conversion workflow.