[bug #12622] avrdude hangs on macosx/darwin with PL-2303 usb-to-serial and Butterfly about avrdude HOT 8 CLOSED

Joerg Wunsch <joerg_wunsch>
Sat 17 Sep 2005 07:47:19 PM UTC

Do you have a chance to test the latest CVS version?

The initialization has been modified for the butterfly/AVR109,
so your case might have been fixed as a side-effect.

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Sun 16 Oct 2005 04:16:07 AM UTC

I am having the exact same problem.  I have tried 5.0BETA as well as 5.0 with no luck.  In 5.0 I tried changing timeout.tv_usec as mentioned above but saw no difference after recompiling.

A few important differences, I am using Darwin 10.4.2 and a keyspan USB <-> Serial adapter.

After typing in a standard avrdude command such as:
avrdude -p m163 -P /dev/tty.USA19H1b1P1.1 -c stk500
the terminal simply hangs.  One interesting note, when I unplug the usb cable for the adapter, instantly I recieve the following error:
avrdude: ser_open(): can't open device "/dev/tty.USA19H1b1P1.1": Device not configured

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Nick Lott
Tue 24 Jan 2006 12:53:12 AM UTC

I have tested on Mac OS X 10.4.4  with a PL2303 device and have no problems. This may be a driver issue??

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Max Egger
Thu 09 Mar 2006 05:14:41 PM UTC

I had the same problem with a Keyspan USA-19HS connected to the SP Duo 2.1, and also with the STK500 board (old protocol), using AVRDUDE 5.1 and Darwin 8.5.0 (OS X 10.4.5). After calling AVRDUDE, the terminal hung until I unplugged the serial adapter, returning the error mentioned above.
I solved it by adding the O_NDELAY flag to the open() call in ser_open(), so it ignores the state of the DCD line. Now it works just fine.

Here's the diff of ser_posix.c:
--- ser_posix_orig.c    2006-03-07 18:17:53.000000000 +0100
+++ ser_posix.c 2006-03-07 18:17:26.000000000 +0100
@@ -137,7 +137,7 @@
/*

• open the serial port
  /
  -  fd = open(port, O_RDWR | O_NOCTTY /| O_NONBLOCK*/);
  +  fd = open(port, O_RDWR | O_NOCTTY | O_NDELAY /| O_NONBLOCK/);
  if (fd < 0) {
  fprintf(stderr, "%s: ser_open(): can't open device "%s": %s\n",
  progname, port, strerror(errno));

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Joerg Wunsch <joerg_wunsch>
Thu 09 Mar 2006 08:02:15 PM UTC

Curious, does OSX offer dual /dev/ttyXXX vs. /dev/cuaXXX
devices?  AVRDUDE is meant to use the latter ones (which
will ignore absense of DCD when opening).

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Nick Lott
Fri 10 Mar 2006 12:02:15 AM UTC

Osx has both TTY.XXXXX and cu.XXXX
I use avrdude with /dev/cu.usbserial/ and it works great.
Is it mentioned in the documentation to use these devices rather than the TTY versions?

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Joerg Wunsch <joerg_wunsch>
Mon 21 Aug 2006 12:09:33 PM UTC

Pilot error: use cuXXX rather than ttyXXX.

Only documentation update is needed.

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Joerg Wunsch <joerg_wunsch>
Mon 21 Aug 2006 12:11:30 PM UTC

Oops, "analyzed" is not a good state: it prevents the bug
report from being displayed in the default search.

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