linux-kernel - Re: pl2303_ttyUSB0 userspace application not able to control RTS line

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Date:	Tue, 5 Oct 2010 23:30:40 -0500
From:	Greg Oliver <oliver.greg@...il.com>
To:	Raju Rameshwar Uprade <rajsingh@...a.tifr.res.in>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: pl2303_ttyUSB0 userspace application not able to control RTS line

On Tue, Oct 5, 2010 at 11:14 PM, Raju Rameshwar Uprade
<rajsingh@...a.tifr.res.in> wrote:
>
>> Is this your "modified" driver?
>
>  No..It's pl2303.
>
>>
>> I don't see that error in the kernel log below at all.
>
>  sometimes I got that error.
>
>> What kernel version is this?
>
>  2.6.35
>
>> And are you sure that your device actually has the RTS lines connected?
>> I have seen a number of these devices that do not bring those lines from
>> the chip to the rs232 connection.
>
> I have connected a RS-485 interface card to this usb-to-serial converter which has
> MAX-485 IC ( Line driver chip which convert RS-232 to RS-485),of which pin number 2 is
> for RTS line.
>
> Through my modified pl2303 device driver, I am able to enable/disable the RTS line as
> per my need,as I told in my earlier email.
>
>> You really might want to go purchase a "real" usb to serial converter
>> that works properly, the pl2303 devices do not fit that category.
>
> Yes, I am also thinking of purchasing a "real" usb to serial converter.
>
> Thanks a lot Greg, I have learned a lot interacting with you.

You know - I have had the (mis)forune of working with some of your
people - straight out of college..  While I was impressed with their
capacities, I was duly unimpressed with their inability to shut the
fuck up when appropriate.  If they knew that a typo on the command
line was more easily correctable after the fact (since of course set
-o vi ) was in place..  then they may (I DOUBT IT) shut the fuck
up....  Anyhow - just a pissed off observation...

Teach them to STFU when noone asked them shit to begin with....  Or -
put a dick (my dick) in their mouths....
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