Unable to locate function in fiaccel

Hi, I have a function "HRCalc_Main_fxp_wrap" which contains multiple fixed-point objects and filter functions, and I'd like to accelerate its execution via fiaccel. Here's how I use fiaccel on HRCalc_Main_fxp_wrap function (where RawPPGStr & dc are fixed-point objects and the rest arguments are in double precision):

function [HROutAry_HW, HROutAry_FW, dataPtrAry, BPM_calcHR, pd] = HRCalc_Main_fiaccel(RawPPGStr, dc, BPM, Fs, FiltEn, DBGEn)

	InputWordLen = 12;
	InputFracLen = 0;

	% ---- Define input fixed-point precisions ---- 
	FxpNumInput = numerictype;
	FxpNumInput.Signedness = 'Unsigned';
	FxpNumInput.WordLength = InputWordLen;
	FxpNumInput.FractionLength = InputFracLen;
	
	FxpMathInput = fimath;
	FxpMathInput.OverflowMode = 'Saturate';

	RawPPGStr_fi = fi(RawPPGStr, FxpNumInput, FxpMathInput); 
	dc_fi = fi(dc, FxpNumInput, FxpMathInput); 

	fiaccel HRCalc_Main_fxp_wrap -args {RawPPGStr_fi, dc_fi}  -o HRCalc_Main_mex  -report
	[HROutAry_HW, HROutAry_FW, dataPtrAry, BPM_calcHR, pd] = HRCalc_Main_fxp_wrap(RawPPGStr_fi, dc, BPM, Fs, FiltEn, DBGEn);


function [HROutAry_HW, HROutAry_FW, dataPtrAry, BPM_calcHR, pd] = HRCalc_Main_fxp_wrap(RawPPGStr_fi, dc_fi, BPM, Fs, FiltEn, DBGEn)
	...
	

However when I ran the HRCalc_Main_fiaccel in my test script, I kept running into the following error:

??? Unable to locate function 'HRCalc_Main_fxp_wrap'.

Code generation failed: View Error Report
Error using coder.internal.fihelper


Error in fiaccel (line 91)
    coder.internal.fihelper(varargin{:});

Error in HRCalc_Main_fiaccel (line 39)
	fiaccel HRCalc_Main_fxp_wrap -args {RawPPGStr_fi,
    dc_fi}  -o HRCalc_Main_mex  -report

Error in HRCalc_test_SinPPG_fxp (line 44)
[HROutAry_HW_fxp, HROutAry_FW_fxp, dataPtrAry, BPM_calcHR,
pd_fxp] = HRCalc_Main_fiaccel(PPG_sin_N, dc_mean,
BPM, Fs, FiltEn, DBGEn);

I googled using the key words "Unable to locate function" & "fiaccel" and can't find any similar question. Can someone with experiences in fiaccel help answer my question?

Thanks in advance

Johnson

Answer 1

[Akash]

Hi Jui,

I attempted to reproduce the error using the provided code but I did not encounter the same issue. To help resolve the error you are experiencing with 'fiaccel', please try the following steps:

1. Make sure the file containing the "HRCalc_Main_fxp_wrap" function is on the MATLAB path.

2. You can try placing the "HRCalc_Main_fxp_wrap" and "HRCalc_Main_fiaccel" functions in separate ".m" files.

3. You may check if there are any Unicode characters in the path to your top-level file. Code generation may fail if such characters are present. You may refer to the below provided MATLAB documentation for more information:

https://www.mathworks.com/help/fixedpoint/ref/fiaccel.html#:~:text=on%20the%20path.-,Note,-If%20your%20top

I hope it helps.