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Simulink data type conversion, single to uint16.

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Jamie
Jamie on 18 Sep 2024 at 5:11
Commented: Jamie on 25 Sep 2024 at 1:00
Hello,
I'm using simulink and I need to convert from a single to a uint16.
Could a kind soul kindly explain why the output of a single (with range 0-2pi) equates to an uint16 of zero?
Here is an example:
And here is the output of that example:
There are a number of uint16 signals in my model with range 0-4000 (I am reading from sevreral ADC). All behave as expected. Just this conversion, in this instance.
  5 Comments
Jamie
Jamie on 19 Sep 2024 at 12:52
Edited: Jamie on 20 Sep 2024 at 2:56
Thanks Daniel, Walter. The signal is being output to a host model using a data serial output. The data serial output transmits two signals of type uint16. An example from the mcb;
Yes, I'm using data type conversion block. Sending multiple signals (more than 2), using PU units / a different data type would be preferable.
Jamie
Jamie on 25 Sep 2024 at 1:00
I still continue to see scaling during data type conversions. This seems very unusual.
Ex. Scaling from 0-1 to 0-4045

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Accepted Answer

Hitesh
Hitesh on 19 Sep 2024 at 9:27
Edited: Hitesh on 19 Sep 2024 at 9:28
Hi Jamie,
I am assuming that you have used "Data Type Conversion" block, and the conversion to "uint16" resulted in unexpected values due to the default integer rounding mode being set to "floor" in Block Parameters. If you change the rounding mode to "round," you will achieve the expected results when converting from "single" to "uint16".
  1 Comment
Jamie
Jamie on 21 Sep 2024 at 12:51
Edited: Jamie on 21 Sep 2024 at 12:52
Thanks all for the comments! Got around it by altering the model and removing the uint conversin blocks.

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