>>>>> "Thomas" == Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx> writes:
Thomas> On Friday, 24. September 2010 16:38:51 Uwe Bonnes wrote: Could
Thomas> you check with MProg if they limit all strings to a
>> total Thomas> of 96 bytes? If yes, we can greatly simplify our
>> "size_check" Thomas> code like this:
>> I don't have access to modified wine here. So I testet linux ftd2xx.
Thomas> if (manfacturer_size*2 + product_size*2 + serial_size*2) >
>> 96) Thomas> explode_and_die(); On a FT232R, FT_EE_Program() failed
>> with error 18 if the string size was
>> > 46. So I think, there's a bug in AN_121, and using plain 96 on all
>> > chips
Thomas> Interesting, the new FTProg manual also mentions 46 characters
Thomas> as the upper limit, so this seems to be a documentation bug.
It is 48 for TYPE_BM, 47 for TYPE_FT2232C, 46 for TYPE_R and 44 for TYPE_H
>> will lead to error. E.g. on a FT2232H, strings start at 0x1a(0x9a)
>> and + 0x66 (0x60 bytes and 3 times length and string marker) will
>> bring us to 0x7f(0xff), leaving no room for the checksum. And then
>> the PNP marker (0x02030000 or 0x02030100) is left out too.
Thomas> Please see the updated eeprom map, I've documented the magic
Thomas> bytes 0x2 0x3 0x1. (I noticed they are mentioned on the NDAed
Thomas> FT2232C eeprom document at the end)
Make it 0x2 0x3 0x1 0x0, as we work on words...
Thomas> AN_121 also mentions the "manufacturer ID" string
>> additionally Thomas> to the "manufacturer" string. Any idea what that
>> The manufacturer ID is a tag used for the "automatic" generation of
>> serial numbers. I have never seen it in the real EEPROM, beside
>> eventually as the first letters of the generated
Thomas> So I guess this is something "software only" and not stored in
Thomas> the eeprom at all, too.
It is software only.
Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
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