From: f8arr <f8arr@f8arr.org>
To: Dave Platt <dplatt@radagast.org>
Cc: linux-hams <linux-hams@vger.kernel.org>
Subject: Re: Issue with RS232 <-> USB adaptor (FC15)
Date: Tue, 14 Jun 2011 22:52:32 +0200 [thread overview]
Message-ID: <4DF7CA10.1090202@f8arr.org> (raw)
In-Reply-To: <4DF68088.9070501@f8arr.org>
Hello
Some progress on my acknowledge...
When the PC start, my DTR of my USB-RS232 is up (-6v).
It mean that a program or a daemon is listenning and/or managing my
serial. I don't want it because i'll use it directly from Wsjt.
If someone has an idear where to search...
73 qro
F8ARR
On 06/13/2011 11:26 PM, f8arr wrote:
> hum...
>
> you are right the Issue is not clear.. something is going wrong...
> I have to investigate.
>
> 73 qro
> f8ARR
>
> On 06/13/2011 11:07 PM, Dave Platt wrote:
>> On 06/13/2011 01:53 PM, Bruno Tréguier wrote:
>>> Le 13/06/2011 à 22:28, f8arr a écrit :
>>>> Hello,
>>>>
>>>> I'm not sure because I found the problem to resolve my issue :
>>>>
>>>> stty --file=/dev/ttyUSB0 clocal
>>>>
>>>> I remove all flow control on the serial.
>> I don't think that "clocal" removes flow control (on RTS/CTS) -
>> that's controlled by a separate option.
>>
>> What "clocal" does, is "disable modem control signals".
>> Specifically, for a port marked "-clocal" (not local),
>> an open() call will block until the device on the port
>> asserts the CD (carrier detect) line, and if the CD
>> line is deasserted the port will "hang up". This is
>> useful for serial ports connected to dial-up modems,
>> but not particularly desirable for serial ports being
>> used to control local devices such as transceiver.
>>
>> I can't recall whether a -clocal port automagically
>> asserts DTR even when it isn't open... I don't think so
>> but I could be wrong.
>>
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next prev parent reply other threads:[~2011-06-14 20:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 19:24 Issue with RS232 <-> USB adaptor (FC15) f8arr
2011-06-13 19:40 ` Dave Platt
2011-06-13 19:54 ` f8arr
2011-06-13 19:58 ` Bruno Tréguier
2011-06-13 20:28 ` f8arr
2011-06-13 20:53 ` Bruno Tréguier
2011-06-13 21:07 ` Dave Platt
2011-06-13 21:26 ` f8arr
2011-06-14 20:52 ` f8arr [this message]
2011-06-14 21:01 ` Bruno Tréguier
2011-06-14 21:06 ` f8arr
2011-06-14 21:20 ` f8arr
2011-06-14 21:39 ` Bruno Tréguier
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