>>>>> "David" == David Challis <dchallis@xxxxxxxxxxxxx> writes:
David> Patch file attached for ftdi.c
>> If I understood Uwe Bonnes correctly, this could read:
>>
>> if (dev->descriptor.bcdDevice == 0x700 || dev->descriptor.bcdDevice
>> == 0x800)
>>
>> Right?
David> I think we need to add a device type for the FT4232H with
David> bcdDevice == 0x800. Uwe can advise on the appropriate packet
David> size for that device.
I don't have a FT4432H device, so I can't comment on the bcdDevice number.
But the FT4432H is a USB-2.0 High Speed device like the FT2232H, and the
maximum packet size for a high speed device for the bulk endpoints is 512
bytes versus 64 bytes for full speed devices. It wouldn't make sense, if the
FT4432h uses a smaller packer size, as this will hog the USB channel, where
4 serial to usb machines inside the FT4432h wait to pump theier data through
the USB channel.
Bye
--
Uwe Bonnes bon@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
--
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx
|
