libftdi Archives

Subject: RE: Fix a bad eeprom write to a FT232RL

From: Uwe Bonnes <bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Fri, 23 Oct 2009 17:31:59 +0200
>>>>> "Michael" == Michael Plante <michael.plante@xxxxxxxxx> writes:

    >>> It seems I wrote the eeprom for a "self powered" device instead of
    >>> "bus
    Michael> powered"
    >>> one and the MaxPacketSize for the Input EP was zeroed.
    >>> 
    >>> [...]
    >>> 
    >>> Anyone know if/how I could fix this?  As I have a second device it's
    >>> not that important the first one is
    Michael> recovered,
    >>> but I would like to know if I can recover from a second bad try.

You can try to shortcircuit SCL when plugging in. Then a standard
device should be recognized. Not take off the shortcircuit and reprogram the
EEPROM.

Do at your own risk...
-- 
Uwe Bonnes                bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

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