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Andy Bartlett


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MathWorks

35 total contributions since 2015

Andy leads the Fixed-Point Designer development team.

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Answered
adding two fixed point numbers
Bin method returns a string The bin method of a fi object a=fi(1,0,3,0); w = a.bin(1:2) class(w) returns a string w = ...

9 dagar ago | 0

Answered
Extracting a subset of a binary number to form a new binary number
Bin fine for interpretted mode, but not code gen or Simulink If you only need to perform the operation in MATLAB interpretted m...

13 dagar ago | 1

| accepted

Answered
Extracting first 8 bit from fixed point number
Two Key Ways There are two key ways to extract the bits from a fixed-point number. One way is to use bitsliceget as Walter poi...

13 dagar ago | 0

Answered
Accumulator Data Type not used in ERT generated code
The C language was designed to closely match what computers do. It is common for a computer's CPU to be based around a particula...

ungefär en månad ago | 1

| accepted

Answered
Floating-points for HDL
HDL Coder is flexible with regard to types. It supports floating-point, fixed-point, and mixtures of the two. The primary benef...

2 månader ago | 0

Answered
Interpolation between matrices in Simulink
It sounds like you have 3 by 4 by 23 by 6 data points corresponding to 3 rpms, 4 altitudes, 23 CPs, 6 Js and you w...

2 månader ago | 0

| accepted

Answered
Simulink's fixed-point tools ignores saturation limits during range collection
Hi, When reporting simulation min and max to the Fixed-Point Tool, several Simulink blocks intentionally give ranges that can b...

2 månader ago | 0

| accepted

Answered
colon expression to use integer operands
1) For embedded designs, if at all possible consider changing your design to work with revolutions instead of radians. 1 r...

3 månader ago | 3

| accepted

Answered
How to use ssRegisterDataTypeInteger with Simulink Coder ?
Hi I've created an example for cases where the types can vary per instance of the s-function. The core of the s-function is co...

3 månader ago | 0

| accepted

Answered
How to use ssRegisterDataTypeInteger with Simulink Coder ?
Hi A low effort way to inline an s-function is to use "wrapping". The general concept of "wrapping" an s-function is described...

3 månader ago | 0

Answered
Compiler generated code for TI C2000 device errors with "floating constant is out of range"
Hi, Having a model that simulates with 64-bit floating-point doubles, but behaves as 32-bit floating-point on the target misses...

4 månader ago | 0

Answered
Remove same types of Simulink blocks using commands
Automatically deleting lots of blocks from a model obviously involves risk, so save a backup and proceed at your own risk. The ...

5 månader ago | 0

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Answered
FAQ: Why aren't boolean and 1 bit unsigned integers treated as the same data type?
Casting a numeric data type to boolean data type is very different from casting to any other numeric type. The following figure ...

6 månader ago | 0

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Answered
How to prevent override with double data type on certain block when deriving simulation ranges with Fixed-point Tool
Too bad the prior approach was not sufficient. Another approach is to use Model Reference. Each parent and child in a Model Re...

6 månader ago | 0

Answered
How to prevent override with double data type on certain block when deriving simulation ranges with Fixed-point Tool
The documentation discusses this here. I'll elaborate on that. To prevent Data Type Override from changing a numerictype, set ...

6 månader ago | 0

Answered
Some forms of Simulink logging write 64 bit integers as fi objects. Does that mean I need a Fixed-Point Designer license?
As of R2017a, a Fixed-Point Designer license would NOT be required. As of R2017a, constructing a fi object whose type is equ...

7 månader ago | 0

| accepted

Answered
int64 in simulink / stateflow?
Update: 64 bit integer modeling in Stateflow is now available. Stateflow C support of int64 and uint64 is available as of R2019...

7 månader ago | 0

Answered
[Fixed-Point Toolbox] How to speed up fi object matrix multiplication?
Making simulation two orders of magnitude faster with fiaccel If the fixed-point code you are simulating is code generation com...

8 månader ago | 0

Answered
Is it possible to pass and use hexadecimal values in simulink, without converting decimal?
If you are interested in entering parameters in hex or binary For MATLAB integer types, then as of R2019b, MATLAB has newly ad...

8 månader ago | 0

Submitted


Tips and Tricks for 64 Bit Integers in Simulink pre-R2020a
Tips and Tricks for Using 64 Bit Integers in Simulink prior to R2020a

11 månader ago | 1 download |

Answered
How to create 64 bit integer data type in Simulink
Hi Mikhail's instructions on registering a 64 bit integer type are spot-on. Nice job! Starting in R2017a, 64 bit integers in S...

11 månader ago | 0

Answered
Why can't I use variables of type int64/uint64 as block parameter in Simulink?
In R2020a, Simulink parameters can now be entered using MATLAB built-in int64 and uint64 types. For example, you can directly e...

11 månader ago | 0

Answered
Replace wide integer multiplication
Hi Leon, Solving the problem may be a simple as turning on support long long for the model. Please see this article. https://...

mer än ett år ago | 0

Answered
What is the difference between the fixed point and floating point modeling in simulink ?
Design choices like where to use floating-point or fixed-point are about embedded implementation efficiency. Implementation eff...

mer än ett år ago | 1

Submitted


Numeric Efficiency Examples
Examples of crafting numeric efficienct embedded designs using mixtures of fixed-point, floating-point and approximations.

mer än ett år ago | 1 download |

Submitted


Tutorial on Simulink Data Type Propagation Engine
Tutorial on Simulink Data Type Propagation Engine

ungefär 3 år ago | 1 download |

Answered
What is stored integer value of a fi object?
Please see https://www.mathworks.com/help/fixedpoint/ug/scaling_f6389.html

ungefär 3 år ago | 0

Answered
How can I convert binary data into fixed point data
First, get the raw integer values in to MATLAB as either uint32 values or int32 values. Second, use the reinterpretcast funct...

ungefär 3 år ago | 0

| accepted

Answered
Is it possible to force single precision instead of double precision when generating code from simulink?
Hi, This <https://www.mathworks.com/videos/data-type-exploration-and-visualization-of-signal-ranges-1506620567017.html video> s...

ungefär 3 år ago | 2

Answered
Force single precision floating-point in generated c code
Hi, There is a Single Precision Converter tool that ships with Fixed-Point Designer that will automatically convert a subsys...

ungefär 3 år ago | 2

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