29 Mar
2010
29 Mar
'10
12:39 p.m.
i managed to get hello_world working on my c121, connected through a
pl2303 usb/serial cable to my macbookpro.
but found that the connection is extremely noisy.
often the movement of me putting down the phone on the table is enough
to break the upload.
is that a common problem with these headphone/serial cable plugs?
for the serial device i can use /dev/cu.PL2303-0000201A
or /dev/tty.PL2303-0000201A
but when using the '/dev/tty...' variant, i have to add this to osmocon.c
diff --git a/src/host/osmocon/osmocon.c b/src/host/osmocon/osmocon.c
index f934dd7..b361eb1 100644
--- a/src/host/osmocon/osmocon.c
+++ b/src/host/osmocon/osmocon.c
@@ -128,6 +128,9 @@ static int serial_init(const char *serial_dev)
/* hardware flow control off */
options.c_cflag &= ~CRTSCTS;
+ /* ignore modem status lines */
+ options.c_cflag |= CLOCAL;
+
/* software flow control off */
options.c_iflag &= ~(IXON | IXOFF | IXANY);
=============================
willem
29 Mar
29 Mar
1:27 p.m.
Hi everyone,
Willem wrote:
i managed to get hello_world working on my c121,
connected through a
pl2303 usb/serial cable to my macbookpro.
but found that the connection is extremely noisy.
often the movement of me putting down the phone on the table is enough
to break the upload.
is that a common problem with these headphone/serial cable plugs?
My question to the more experienced Calypso hackers (Harald?):
How reliable are your uploads, do they work at the first attempt all
the time, or should we expect some intermittent errors? How many?
I'm using a self-made cable consisting of a known good FT232R
converter @ 3.3V and a cut off headset cable (that also worked
flawlessly without any noise on another mobile phone before). My C123
also looks pristine. I manage to upload and run hello world
successfully in maybe one out of ten attempts, often have to remove
the battery because the phone just gets stuck. So I have ordered a new
cable from Akku-King as suggested on the Wiki.
Chris
30 Mar
30 Mar
3:41 a.m.
On Mon, Mar 29, 2010 at 12:39:35PM +0200, willem wrote:
i managed to get hello_world working on my c121,
connected through a
pl2303 usb/serial cable to my macbookpro.
but found that the connection is extremely noisy.
often the movement of me putting down the phone on the table is enough
to break the upload.
is that a common problem with these headphone/serial cable plugs?
no. maybe something about your cable or plug or socket in the phone? I
only get unreliable/noisy transmissions if the plug is not properly
inserted all the way to the end (which is likely since the plug housing
diameter is typically a bit larger than what the phone case can take
unless you remove the PCB from the phone, or have a very low-diameter
plug housing of your cable.
Initially I was using a 2.5mm to 3.5mm headphone adapter cable (the ones
for attaching regular 3.5mm headphones to phones that have a 2.5mm plug,
as those plugs are smaller than anything I've seen from the T191 serial
cables so far).
+ /* ignore modem status lines */
+ options.c_cflag |= CLOCAL;
+
This is something I pondered of doing anyway... it simply made no
difference on Linux / pl2303 so I never bothered...
But I'm happy to merge it.
Regards,
Harald.
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
5 Apr
5 Apr
7:17 a.m.
fyi, using the /dev/cu.** variant solved my problem of osmocon being
unable to write CMD1 to the port. At least, it worked with an FTDI
cable I built. I imagine it will solve the issue with the prolific
cable as well (will try later).
On 29/03/2010 03:39, willem wrote:
i managed to get hello_world working on my c121,
connected through a
pl2303 usb/serial cable to my macbookpro.
but found that the connection is extremely noisy.
often the movement of me putting down the phone on the table is enough
to break the upload.
is that a common problem with these headphone/serial cable plugs?
for the serial device i can use /dev/cu.PL2303-0000201A
or /dev/tty.PL2303-0000201A
but when using the '/dev/tty...' variant, i have to add this to osmocon.c
diff --git a/src/host/osmocon/osmocon.c b/src/host/osmocon/osmocon.c
index f934dd7..b361eb1 100644
--- a/src/host/osmocon/osmocon.c
+++ b/src/host/osmocon/osmocon.c
@@ -128,6 +128,9 @@ static int serial_init(const char *serial_dev)
/* hardware flow control off */
options.c_cflag &= ~CRTSCTS;
+ /* ignore modem status lines */
+ options.c_cflag |= CLOCAL;
+
/* software flow control off */
options.c_iflag &= ~(IXON | IXOFF | IXANY);
=============================
willem
5137
days inactive
5144
days old
baseband-devel@lists.osmocom.org
3 comments
4 participants
participants (4)
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Christian Vogel -
Harald Welte -
Nathan Fain -
willem