why simulink model create a roundf() function in code generating process and how it used?

/* no factor to apply */

result = result - -1023.0;

/* round to closest integer value for integer CAN signal */

outValue = roundf(result); //whats it?

}

{

uint16_T packedValue;

if (outValue > (real64_T)(2047)) {

packedValue = (uint16_T) 2047;

} else if (outValue < (real64_T)(0)) {

packedValue = (uint16_T) 0;

} else {

packedValue = (uint16_T) (outValue);

Answer 1

[Abhaya]

Hi,

The ‘roundf’ function is a standard part of the C library, defined in the <math.h> header. It takes a floating-point value as input and computes the nearest integer value, returning this result in floating-point format.

During code generation, Simulink employs the 'roundf' function to determine the nearest integer value when propagating signals.

For more information, please follow the MATLAB community answer discussion link given below.

https://www.mathworks.com/matlabcentral/answers/2021892-canpack-code-generation-problem-for-mcu-without-floating-point-math-capabilities

Hope this helps.