How to generate c code for filtfilt for low pass fir filter

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afef
afef 2017-8-16
Hi, i used a low pass fir filter using the following function
d1=designfilt('lowpassfir','PassbandFrequency',0.45,'StopbandFrequency',0.5,'PassbandRipple',3,'StopbandAttenuation',6
0,'DesignMethod','equiripple');
a = filtfilt(d1,deriv1);
I want to generate c code for this but when i look in matlab fileexchange i found thishttps://www.mathworks.com/matlabcentral/fileexchange/32261-filterm
And i don't know how to define the b and a used in this code. Can anyone help me please?

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