12.01.2021, 11:42, "Kevin Grant" <elect...@mykolab.com>:
> Fausto
>
> If you can't read the device, writing won't work either. I think there is
> still some addressing problem.
>
> A search with your package manager or internet search might help you find a
> binary editor.
>
> Alternatively, a few lines of python could make a binary file for you:
>
> import os
> filename = os.path.join(os.path.dirname(__file__), "eeprom-new.bin")
> with open(filename,'wb') as f:
> f.write(bytearray([0xc0,0x50,0x1d,0x8d,0x60]))
>
> Then write the new data with
>
> fx2tool -B -d 16c0:296d write_eeprom -W 2 -a 0 -f ./eeprom-new.bin
I finally found my Geetech board and decided to try it out. Had to replace its
USB port
because it was shorted out for some reason, that's why it took so long =D It
read back all ff's, too.
Tried your Python file generator, it generated a .bin file, checked with xxd
that it has the right
contents.
00000000: c050 1d8d 60
However, writing it with fx2tool -B -d 04b4:8613 write_eeprom -W 2 -a 0 -f
./eeprom-new.bin
and then reading back the EEPROM contents, nothing changes - ff's stay and
VID/PID are
the same. I've finally found how to "write" it - unplug J2, power the board up
and then write.
Then, the hexfile contents seem to actually change the EEPROM. However, you
can't read
with J2 unplugged, you need to plug it back - only then you'll see your changes
apply.
Aaaaand it doesn't change the VID/PID, even though it looks like this:
00 c0 c0 16 6d 29 00 00 00 ff ff ff ff ff ff ff
I took my other Saleae LA, a $5 8ch one that actually works, here's how its
first 16 bytes look:
c0 25 09 81 38 01 00 00 28 94 07 dd 49 d8 61 a6
Here's a Python script I wrote that takes this line of text and generates an
EEPROM:
s = "c0 25 09 81 38 01 00 00 28 94 07 dd 49 d8 61 a6"
b = [int("0x"+c, 16) for c in s.split(" ") if c]
print(b)
filename = "eeprom_8chla_copy.bin"
with open(filename,'wb') as f:
f.write(bytearray(b))
After flashing my LA with the resulting file, still removing the jumper for
flashing:
fx2tool -B -d 04b4:8613 write_eeprom -W 2 -a 0 -f ./eeprom_8chla_copy.bin
It identifies just like my other analyzer which I copied the EEPROM from:
Bus 001 Device 078: ID 0925:3881 Lakeview Research Saleae Logic
I hope this is useful in some way.
Cheers!
Arsenijs
> Good luck, I hope you get it working.
>
> On 2021-01-12 00:01, Fausto Barbosa wrote:
>> Kevin,
>> in that case, which editor would I use to edit the bin eeprom file? I will
>> try to insert that information and flash the modified file.
>> Thank you.
>> Fausto.
>>
>> On Mon, Jan 11, 2021 at 6:27 PM Kevin Grant <elect...@mykolab.com> wrote:
>>> Hmm. That's still not good. Probably something wrong with eeprom addressing.
>>> I would expect to see the VID PID in the first few bytes like this:
>>>
>>> fx2tool -B -d 16c0:296d read_eeprom -W 2 0 256
>>> c0 c0 16 6d 29 00 00 00 ff ff ff ff ff ff ff ff
>>> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>>> ...
>>>
>>> Then you would select a new VID PID, maybe this one from api.c:
>>> sigrok FX2 based 16-channel logic analyzer 1d50:608d
>>> Then you would write something like this back to the EEPROM.
>>> c0 50 1d 8d 60 00 00 00
>>>
>>> On 2021-01-11 20:49, Fausto Barbosa wrote:
>>>> As you guessed, the line
>>>> $ fx2tool -B -d 16c0:296d read_eeprom -W 2 0 256
>>>> failed but in fact, the model my board has a jumper (J2) that, when
>>>> opened, associates address 0x51 to the i2c port.
>>>> See this reference (which is identical to my board. J2 is at the bottom of
>>>> the figure 1)
>>>> https://community.cypress.com/t5/Knowledge-Base-Articles/Cypress-EZ-USB-FX2LP-based-Logic-Analyzer-using-Open-Source/ta-p/252866
>>>>
>>>> Then I opened the jumper, ran the command line again and, voila, got the
>>>> empty firmware output again :\
>>>> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>>>> ...
>>>>
>>>> Is this output expected to show the VID PID numbers in some place?
>>>>
>>>> Best regards.
>>>> Fausto.
>
> ,,
>
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