Re: Reading/Writing FT4232 EEPROM

[Ori Idan <ori@xxxxxxxxxxxxxxxxx>]

On Fri, Jun 21, 2013 at 5:31 PM, Anders Larsen <al@xxxxxxxxxxx> wrote:

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)

Assuming my EEPROM is erased, I tried doing flash-eeprom.

The result was even stranger:

Unable to find FTDI devices under given vendor/product id: 0x403/0x6011

Error code: -4 (usb_open() failed)

Retrying with default FTDI pid=0x6001.

Error: device not found

I did lsusb again to make sure the device is connected and got the expected result:

Bus 001 Device 005: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC

-- 

Ori Idan

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