What is the range of values that your fixed type requires?
Are you most concerned with speed or accuracy?
i have variables with quite different ranges of value, but i did specify that on the model.
the model is not so slow when using double type, so i'm interested in good accuracy
and then choose the appropriate integer type to hold those values.
clear. when i choose to my question is just if you know something about how this fixdt data type works on arduino (in the signal notation of simulink, an example of this variable is called sfix16_en5 - 16 is the word lenght, 5 the fraction lenght - and it's a fixed point data type which uses int16 as "container")