Re: non-standard baud rates with Prolific 2303 USB-serial

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On 2/23/21 11:52 AM, Johan Hovold wrote:
> On Tue, Feb 23, 2021 at 11:30:41AM -0500, Michael G. Katzmann wrote:
>> On 2/23/21 11:14 AM, Johan Hovold wrote:
>>> I only have an HXD (and a GC) here.
>>>
>>> The HXD has bcdUSB as 1.10 unlike your TA with 2.00, but not sure that
>>> helps.
>> Sound promising .. why do you think this is this not reliable?
> Perhaps it is. Perhaps even bcdDevice of 3.00 is enough (includes some
> older variants that the TA replaced supposedly). Not sure anyone ever
> tried the current scheme on those older models.
>
> Charles, could you post the output of "lsusb -v" for your PL2303TA? And
> did you verify that you actually got 110 Bd with the current Linux
> driver?
>
> Johan

Here is the USB packet capture from Wireshark oon Windows 10 when:

1) plugging in pl2303 (packets 18-393)

2) setting the device wia cmd line to 110/even/7 bits/2 stop (packets 393-690)

(device is on port 1.7)

https://drive.google.com/file/d/17TkV9JB2iFNdr4LvRftBnV3_DgITGvUH/view?usp=sharing

There are orders of magnitude more traffic than in Linux!


-- 
   |\      _,,,---,,_             Michael Katzmann
   /,`.-'`'    -.  ;-;;,_         NV3Z / VK2BEA / G4NYV
  |,4-  ) )-,_. ,\ (  `'-' 
 '---''(_/--'  `-'\_)             MichaelK@xxxxxxxx




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