libftdi Archives

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

From: "Michael Plante" <michael.plante@xxxxxxxxx>
To: <libftdi@xxxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Oct 2009 11:25:58 -0500
Nuno wrote:

>> I'm more of a software guy than an hardware guy. This is a FTDI
>> USB-Key [1], which doesn't seem to be possible to open without
>>breaking the plastic (and I'm a zero with a solder iron ;-).

Eh, I looked at the FT232R datasheet just now (instead of the FTDI chip I've 
been using), and my idea wouldn't work anyway...it's internal.


>> Maybe I could hack the USB linux driver to force the values read by
>> the kernel (it's not the first time I make a dirty hack on the
>> kernel), but don't even know if the problem is on the kernel or on the
>> device side.

There are people experienced with the kernel over on the libusb-devel list who 
could probably help (though somewhat hostile to FTDI).  I have no idea if that 
would break your other USB devices, though.  If you have any luck with this, 
it'd be nice if you posted a patch; I'm sure this is not the first time 
someone's had a EEPROM problem like this.  I generally avoid it by using MPROG 
once and *then* loading libftdi/libusb-win32, but that's a hassle.


Michael


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