[time-nuts] FE-5680 Linux command line tool
jgray at zianet.com
Fri Oct 10 20:19:26 EDT 2014
I haven't looked at the EEPROM dump, so I can't help you with that. Perhaps
someone else can.
One place for various adapters to program chips is MCU Mall. I have
purchased from them a few times.
It they don't have the size SMD clip you need, you'll have to Google. I
bought a few elsewhere years ago, but don't remember where.
On Fri, Oct 10, 2014 at 3:47 PM, Tom Wimmenhove <tom.wimmenhove at gmail.com>
> Thanks Joe!
> I don't have the clip-ons but of course I could get them. I know the chip
> has a JTAG interface, but I've only used JTAG with chips that came with a
> programmer and software :) (except with OpenOCD over parport once, but that
> was in the stone age).
> Another question about the EEPROM dump Elio Corbolante. The chip has a
> 256Kbit (32KB) EEPROM and the dump is 160K:
> -rw-rw-r-- 1 tom tom 160K nov 8 2012 FE5680A_EEPROM.bin
> Which part in this dump is the actual data from the EEPROM?
> Thanks in advance.
> On Fri, Oct 10, 2014 at 12:21 PM, Joseph Gray <jgray at zianet.com> wrote:
> > I don't know how crowded the board is, but I would use an SMD DIP clip
> > instead of unsoldering the chip.
> > Joe Gray
> > W5JG
> > On Oct 10, 2014 8:30 AM, "Tom Wimmenhove" <tom.wimmenhove at gmail.com>
> > wrote:
> > > I recently came across a thread on this list about undocumented FE5680
> > > commands. I have been using a little linux command line tool I wrote
> > years
> > > ago for tuning the unit and decided to add these commands to it.
> > > Since this mailing list was the place I found the unit (someone linked
> > > an ebay seller) I figured I' d join the list and throw it on here :)
> > > http://www.tomwimmenhove.com/otherstuff/fe5680-0.2.tgz
> > >
> > > Now, the bad news. I had my unit running overnight while logging the
> > serial
> > > command output that reads the ADC, and in the morning it was no longer
> > > locked. The 10MHz signal disappears about 5 seconds after power-on, and
> > > programmed offset was somehow reset to zero (it had been set to -645).
> > > it appears as if the internal EEPROM has been corrupted.
> > > I read a post from Elio Corbolante where he posted EEPROM and firmware
> > > dumps. Anyone have any idea on how to re-write this firmware back into
> > the
> > > EEPROM by hand (would this be possible through JTAG, or do I actually
> > have
> > > to solder the chip out of there? :) ) Or maybe there's someone willing
> > > sell their broken unit I could take the chip out of?
> > >
> > > Regards,
> > > Tom
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