On 28/04/2012, at 6:50 PM, Xiaofan Chen wrote:
> On Sat, Apr 28, 2012 at 3:45 PM, Daniel Kirkham <dk2@xxxxxxxxxxxxx> wrote:
>> Hello,
>>
>> I'm trying to get my DLP-2232H module (FT2232H plus 93LC46) working with
>> libftdi, initially to rewrite the EEPROM so that the device starts one of
>> the two channels in UART mode.
>> Long term, my application will probably work with just the stock linux
>> driver (ftdi_sio) but I will need to use MPSSE to program a CPLD in place,
>> and so need to get libftdi working with the device.
>>
>> But to my initial problem. I've downloaded the libftdi tree from git, found
>> what I believe are the appropriate development libraries and compiled. But
>> when I run either ftdi_eeprom, or examples/eeprom the programs hang
>> indefinitely apparently trying to fully claim the device.
>> ...
>> The problem may lie inside libusb, but I figured there may be greater
>> knowledge of FTDI devices in this forum.
>
> If you suspect libusb-1.0 and you may well be correct since the
> older 1.0.8 is buggy and 1.0.9 was only released a few days ago
> after the fork libusbx announced. You should try libusb-1.0.9
> or the fork libusbx-1.0.10 to see if they solve your problem.
>
> One of the libusb-1.0.8 bugs which has caused many problem
> for people running Linux: http://www.libusb.org/ticket/56
>
> libusb-1.0: http://www.libusb.org/
> libusbx: http://www.libusbx.org/
>
> --
> Xiaofan
Xiaofan,
Thanks for the tip. Building and installing libusb-1.0.9 did the trick, it
immediately allowed me to open the device.
I then had to hack the eeprom program to get my desired reprogramming done, but
that is now complete and my device is in UART mode.
Daniel
--
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