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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 6 Oct 2010 09:44:38 +0530
From:	"Raju Rameshwar Uprade" <rajsingh@...a.tifr.res.in>
To:	Greg KH <gregkh@...e.de>,
	Raju Rameshwar Uprade <rajsingh@...a.tifr.res.in>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: pl2303_ttyUSB0 userspace application not able to control RTS line

> 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.

Thanks-
Raj
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/