Re: Issue with RS232 <-> USB adaptor (FC15)

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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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