Andy Bartlett

Last seen: 2 days ago

MathWorks

50 total contributions since 2015

Andy leads the Fixed-Point Designer development team.

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Answered
Counter for Sawtooth signal in Simulink
The icon shows the Z-domain description of the Integrator block in accumulator mode (noting that K = 1) Y(z) = ( z / (...

2 days ago | 0

Answered
How can I use fractional data types when the values are beyond the interval [-1, +1) ?
I recommend against trying to force a design to use fractional types. Using general fixed-point scaling instead of limiting only...

3 days ago | 0

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Answered
simulink fixed point advisor example file
The model used in Harhita's Webinar is attached along with a script to define an input object to trigger both of the model's sim...

4 days ago | 0

Answered
Counter for Sawtooth signal in Simulink
Look at the edge detection blocks and the discrete integrator in accumulator mode. You can also look under the mask of the edge...

5 days ago | 0

Answered
How can I make my simulation stop when my graph hits 0? (Simulink)
You can build a solution using the Stop Block. You'll need to build the logic that feeds the Stop Block input using relational...

5 days ago | 0

Answered
Vector to matrix using assignment - Simulink
As Fangjun noted, MATLAB Function block is a good approach. It can also be done with a combination of reshapes and selector.

9 days ago | 0

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Answered
Move a simulink block to a existing subsystem using matlab script
Combination of add_block and delete_block commands should do the trick.

9 days ago | 1

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Converting continous time function to fixed point-help
First determine which parts of your model are intended for embedded system deployment. Isolate that portion into a subsystem or...

10 days ago | 1

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Vector to matrix using assignment - Simulink
Does the reshape block meet your needs?

11 days ago | 0

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Non uniform quantization block in simulink?
Flat Lookup Lookup Table Using Flat Interpolation can be used for arbitrary quantization to a set of specified quantization val...

17 days ago | 0

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argument of type "int64_t" is incompatible with parameter of type "int64m_T" - Static code metrics error report
It is likely the solution is really easy. Just check that the specified production hardware target is correctly configured for...

17 days ago | 1

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Answered
Unexpected "Embedded Coder not licensed or not installed" error
Please see the help for the license command.

17 days ago | 0

Answered
change fixed point number signedness
reinterpretcast is the solution u = fi(129,0,8,0) ntu = numerictype(u) nty = numerictype(ntu,'SignednessBool',true) y = rein...

20 days ago | 0

Answered
extract one of the bits in fi(), flip it, and reassemble it to produce new bin
Please see my answer in your similar question. That answer provides a one-liner that works in most cases. It also provides a m...

20 days ago | 0

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flip a bit in a fixed point object
Toggling a bit in the i-th position can be tricky depending on the variety of inputs you need to support scalar vs array signe...

20 days ago | 1

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 = ...

1 month 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...

1 month ago | 1

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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...

1 month 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...

2 months ago | 1

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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...

3 months 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...

3 months ago | 0

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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...

3 months ago | 0

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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 months ago | 3

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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...

4 months ago | 0

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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...

4 months 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...

5 months 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 ...

6 months 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 months 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...

7 months 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 ...

7 months ago | 0