But is it a matter of producers or resellers? I mean, should I look boards
from other sellers still produced by LCsoft (this model has a jumper to
bypass the EEPROM which I really need) or should I like for other boards
directly?
Matt
On Sun, Oct 21, 2012 at 10:10 PM, Alex G. <[email protected]> wrote:
> On 10/21/2012 07:57 PM, v01d wrote:
> > Ok, I've check the REVID var and returns 0x004, which seems to be value
> > for FX2. Also, when I write outside the range, any access outside 8KB
> > returns the same written value =/
> >
> Sounds like Bert is right.
>
> > Do you know of any trusted ebay seller from where I can get the real
> > FX2LP? Thank you.
> >
> Uwe or Bert might have more info on this. As a first step, avoid
> Chinese, or Hong-Kong sellers. That's where torrofecal clones come from.
> Also avoid any seller that does not disclose location down to the city
> level (California, USA == avoid; Los Angeles, California == might be
> legit).
>
> Alex
>
> > Matt
> >
> > On Sun, Oct 21, 2012 at 9:38 PM, Alex G. <[email protected]
> > <mailto:[email protected]>> wrote:
> >
> > On 10/21/2012 05:52 PM, v01d wrote:
> > > Hi, sorry for the continuous strain of emails but I've tested
> writing
> > > and reading something in location 0x3FF0 and it works properly. It
> > seems
> > > that I do have 16KB of memory. Or do I?
> > >
> > I don't know much about the FX2, but it is possible that the address
> > wraps around. I would try writing over the entire memory range, and
> only
> > then, read back. (either random data, or 16-bit self-address should
> do
> > the trick)
> >
> > Alex
> >
> > > On Sun, Oct 21, 2012 at 11:52 AM, v01d <[email protected]
> > <mailto:[email protected]>
> > > <mailto:[email protected] <mailto:[email protected]>>>
> > wrote:
> > >
> > > I meant, enumerates as high-speed, sorry.
> > >
> > >
> > > On Sun, Oct 21, 2012 at 11:52 AM, v01d
> > <[email protected] <mailto:[email protected]>
> > > <mailto:[email protected]
> > <mailto:[email protected]>>> wrote:
> > >
> > > Oh, damn.
> > > But, if it enumerates as full-speed do you think it is a
> > > counterfeit chip also?
> > > I will try to run benchmarks, and see speeds.
> > > Is there any way to discern the good and bad chips before
> > buying?
> > >
> > > Thanks
> > >
> > >
> > > On Sun, Oct 21, 2012 at 5:33 AM, Bert Vermeulen
> > <[email protected] <mailto:[email protected]>
> > > <mailto:[email protected] <mailto:[email protected]>>> wrote:
> > >
> > > On 20/10/12 23:15, v01d wrote:
> > > > Hi,
> > > > I've been working on the Cypress FX2 chip (with the
> > LCsoft
> > > board from
> > > > ebay) and I had a very hard time making it work
> (mainly,
> > > renumerate)
> > > > using any code that depended on fx2lib.
> > > > I've finally found some code based on gnuradio which
> > > didn't use fx2lib.
> > > > They developed their own base code and, provided you
> > take
> > > some care when
> > > > compiling their code, it works perfectly.
> > > > I haven't been able to understand why fx2lib code
> > does not
> > > work in the
> > > > same board.
> > >
> > > You should be aware that there's been a rash of
> > counterfeits
> > > on the
> > > LCsoft boards on ebay -- got some bad ones myself. The
> > chips are
> > > labelled correctly as the Cypress FX2LP, but are
> actually
> > > the older
> > > Cypress FX2. Among other things, it's a Full Speed-only
> > > (12Mb/s) USB
> > > chip. It also has 8K RAM instead of the FX2LP's 16K.
> > > However, fx2lafw
> > > doesn't run on it.
> > >
> > > It's perfectly possible to run code on it, if you don't
> > > require HS
> > > (which fx2lafw does) and don't try to use memory over
> 8K.
> > > Quite likely
> > > this is the case for the USRP firmware.
> > >
> > > So I think you've got a counterfeit.
> > >
> > > > I have submitted this issue to the fx2lafw github
> repo
> > > since it is
> > > > simple to reproduce in my case (I use compiled and
> > > precompiled firmware
> > > > and neither work) but I realize this may be a
> problem in
> > > fx2lib itself.
> > > > The thing is that the fx2lib code does not seem to
> > be very
> > > active and
> > > > fx2lafw does, so maybe the devs here have more idea.
> > > > Also, I'm reporting this here in the interest of
> fixing
> > > fx2lib since it
> > > > looks like a fine library to base code on (I don't
> > know if
> > > the gnuradio
> > > > has a very complete implementation of all FX2
> > functions).
> > >
> > > fx2lafw is a sub-project of sigrok, and this is the
> > correct
> > > place to
> > > report problems for it. That github repo is just a
> > random fork.
> > >
> > > fx2lib has some problems compiling with more recent
> > versions
> > > of SDCC, so
> > > we fixed those
> > >
> > (
> http://sigrok.org/gitweb/?p=sigrok-firmware-fx2lafw.git;a=history;f=fx2lib;hb=HEAD
> )
> > > and ship fx2lafw with that (stripped-down) version of
> > > fx2lib. However,
> > > we're not the official maintainers of fx2lib, the
> project
> > > does indeed
> > > appear to be abandoned.
> > >
> > >
> > > --
> > > Bert Vermeulen
> > > [email protected] <mailto:[email protected]>
> > <mailto:[email protected] <mailto:[email protected]>>
> > >
> > >
> >
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> > >
> > >
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