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 =/
Do you know of any trusted ebay seller from where I can get the real FX2LP?
Thank you.
Matt
On Sun, Oct 21, 2012 at 9:38 PM, Alex G. <[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]>> wrote:
> >
> > I meant, enumerates as high-speed, sorry.
> >
> >
> > On Sun, Oct 21, 2012 at 11:52 AM, v01d <[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]>> 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]>
> >
> >
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