libftdi Archives

Subject: Re: Reading/Writing FT4232 EEPROM

From: Anders Larsen <al@xxxxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Fri, 21 Jun 2013 16:31:42 +0200
Hi,

On 2013-06-21 11:36, Ori Idan wrote:
On Fri, Jun 21, 2013 at 11:31 AM, Anders Larsen <al@xxxxxxxxxxx> wrote:

> On 2013-06-20 17:00, Ori Idan wrote:
>
>> Thank you, it still does not work.
>> I use the command: sudo ftdi_eeprom --read-eeprom example.conf
>> I get EEPROM size: -1
>>
>
> aah, that means that the EEPROM is erased (all 0xff);
> see ftdi_read_eeprom() in ftdi.c: "Guesses size of eeprom ... will not
> work with blank eeprom"


If EEPROM is erased, how do I get the Vendor Id and Product Id when doing
lsusb?

with an erased EEPROM the FTDI chip falls back to the default vendor:product (which is 0403:6011)

Cheers
Anders
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