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CRC code generator

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3.3 | 15 ratings Rate this file 39 Downloads (last 30 days) File Size: 474 Bytes File ID: #14275

CRC code generator

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14 Mar 2007 (Updated )

Code generates CRC code for any binary data stream & generator polynomial

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Description

The standard polynomials are not used to make it more flexible.
User provide data stream and generator polynomial.

Required Products Communications System Toolbox
MATLAB release MATLAB 7.0.4 (R14SP2)
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Comments and Ratings (21)
28 Mar 2014 nagaraju  
15 May 2013 chandrahas

clc;
close all;
clear all;
x = input('enter data word');
y = input('enter pattern word');
p = length(y);
k = length(x);
n = p+k-1;
dw = x;
for z=1:(n-k)
dw(k+z) = 0;
end
for z=1:p
td(z)= dw(z);
tr2(z)=0;
tr3(z)=1;
end
tr = xor(td,y);
while(1)
z=z+1;
if(z>n)
break;
end

tr(p+1)=dw(z);
for l=2:(p+1)
tr1(l-1)=tr(l);
end

tr = tr1;
if(tr(1)==0)
tr=xor(tr,tr2);
else
tr=xor(tr,y);
end
end
cd=x;
for z=2:p
cd(k+z-1)=tr(z);
end
disp(cd);

%try this..........

04 Aug 2011 rakesh

can any one help me to write a code for crc-6 in matlab please

dis my id:rakeshreddy255@gmail.com

regards
rakesh

10 Dec 2009 George Nychis

CRC 32 code:
http://www.cs.washington.edu/homes/dhalperi/useful/crc32.m

20 Oct 2009 ATM

grat c> i think your calculation is worng. i hav calculated by hand as well, it gives crc=1 0 0.i think the code is correct.

thanks.

19 Feb 2009 Jochen

does not working correct for all generator polynomials, see previous comment.
code needs review. See text bosk or wikipedia for correct (pseudo) code

14 Nov 2008 grat c

i used wiki's example to check for its correctness:
http://en.wikipedia.org/wiki/Cyclic_redundancy_check#Computation_of_CRC

msg = [1 1 0 1 0 0 1 1 1 0 1 1 0 0]; poly = [1 0 1 1];
the program gives r = 1 0 0

i've also tried to do the XORs by hand...
i found it is indeed 1 0 1, not sure where goes wrong

29 Aug 2008 Jo Mateix

Was great! Thanks!

23 Jun 2008 Glen Klein

Communication toolbox is not required. Another reviewer (Andrea Silvestri) is right: "the for cycle could be replaced with on single line: r=mod(r,2) "

20 May 2008 li ming

hao

11 May 2008 Rudheesh Raghav

Good Work..

I feel the for loop is not required..

31 Mar 2008 Andrea Silvestri

Maybe the for cycle could be replaced with on single line: r=mod(r,2)

13 Mar 2008 N Fine

unstable and slow with long input vectors - better do everything above Z(2)

24 Nov 2007 Mohsin Shaikh )  
25 Sep 2007 mona sherdiwala  
23 Aug 2007 fred uit vosselaar

good code works fine for me. thanks a lot

21 Aug 2007 jef al

your code can only work if the number of data streams are below 360 bits. any higher bits gives error. using GFCONV method works fine

27 Jun 2007 sundas zahid

yeah the code is good but but it can be modified as to the input can be made real time....

24 May 2007 daty daty

I need CRC-32 in my simulations.
Should I take this script and change
the generator polynomial to find it ??

23 May 2007 Ahmad Wazzi

Easy to follow. For the previous comment, please understand how CRC is done and you will find the code straight forward. Code is self explanatory.

15 Mar 2007 Jos x@y.z

How do ever expect someone to use this code succesfully if you do not provide any help whatsoever.

Moreover, this is a script that may override existing variables ...

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