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Discussion Groups | Comp.DSP | How to load datum produced by Matlab to CCS?

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How to load datum produced by Matlab to CCS? - peter@mir.knu.ac.kr - 2004-10-01 02:15:00

I have designed a FIR filter by Matlab, and saved the filer
coefficients as a data file.
   I want to utilize these coefficients on 6711DSK board to do some
calculation.
   But when I load the coefficient data file to CCS,CCS showed the
data file can not be open.
   I don't know why 
   I am always expecting your answer.


3x

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Re: How to load datum produced by Matlab to CCS? - John Sampson - 2004-10-02 13:11:00

p...@mir.knu.ac.kr (p...@mir.knu.ac.kr) wrote in message
news:<9...@posting.google.com>...
> I have designed a FIR filter by Matlab, and saved the filer
> coefficients as a data file.
>    I want to utilize these coefficients on 6711DSK board to do some
> calculation.
>    But when I load the coefficient data file to CCS,CCS showed the
> data file can not be open.
>    I don't know why 
>    I am always expecting your answer.
> 
> 
> 3x

CCS for the '54X has a specific text format that it expects the data to
be arranged in. The first line must contain a magic number and a length,
if I remember correctly. The format is the same as what you get in saving
memory to a file. It should be documented in the online help.

Alternatively, you can write a simple m-file to write out a .c file that declares
an intialized array, and add that file to your project. I always use this method.

Here is some sample matlab code:

function stat = csave(c,vname,hdr1,hdr2,fname)

    format long;
    fid = fopen(fname,'wt');
    fprintf(fid,hdr1);
    fprintf(fid,'\n\n');
    fprintf(fid,hdr2);
    fprintf(fid,sprintf('\n\n#define\tN%s\t%d\n',upper(vname),length(c)));
    fprintf(fid,sprintf('\nconst WORD %s[N%s] = {\n',vname,upper(vname)));
	for m=1:(length(c)-1)
        fprintf(fid,'\t%d,\n',c(m));
	end
	fprintf(fid,'\t%d\n',c(end));				% no comma
	fprintf(fid,'};\n');

	stat=fclose(fid);
   
return



Hope this is helpful.

John