Re: [PATCH 1/8] get_dvb_firmware: Add firmware extractor for si2165

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On Wed, 23 Jul 2014 21:03:14 +0200
Matthias Schwarzott <zzam@xxxxxxxxxx> wrote:

[...]
> The crc value:
> It protects the content of the file until it is in the demod - so
> calculating it on my own would only check if the data is correctly
> transferred from the driver into the chip.
> But for this I needed to know the algorithm and which data is
> checksummed exactly.
> 
> Are the different algorithms for CRC values that give 16 bit of output?
>

You could try jacksum[1] and see if any algorithm it supports
gives you the expected result, there is a handful of 16 bits ones:

  jacksum -a all -F "#ALGONAME{i} = #CHECKSUM{i}" payload.bin

Ciao,
   Antonio

[1] http://www.jonelo.de/java/jacksum/

-- 
Antonio Ospite
http://ao2.it

A: Because it messes up the order in which people normally read text.
   See http://en.wikipedia.org/wiki/Posting_style
Q: Why is top-posting such a bad thing?
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