[MACTCL] serial device not recognized: problem in "configure" ?

[<Fra...@im...>]

Hello,

   I am playing with a serial device (a SONY=20
EVI-D100) that I want to control from a tcl=20
shell. On the new macs, there is no more serial=20
ports. So I am using a "Keyspan Twin serial" USB=20
to serial adaptor. This creates 4 device files on=20
my computer:

crw-rw-rw-  1 root  wheel  8, 2 Jul 30 13:54 /dev/tty.USA28213P1.1
crw-rw-rw-  1 root  wheel  8, 4 Jul 30 13:54 /dev/tty.USA28213P2.2

crw-rw-rw-  1 root  wheel  8, 3 Jul 30 13:54 /dev/cu.USA28213P1.1
crw-rw-rw-  1 root  wheel  8, 5 Jul 29 16:03 /dev/cu.USA28213P2.2

the "213" is the "geographical name" of the=20
device (?), I think this means that it is on USB=20
channel 2, USB hub 1, USB port 3. The important=20
thing is: it will change over time, so, for=20
example, you can't count on your serial device to=20
be on /dev/tty1 all the time.

   The first problem I encountered was that OS X=20
tcl doesn't do serial: after opening one of those=20
devices, you can't set the "-mode" option with=20
"fconfigure" to setup baud rate, parity, etc...

   I traced this problem to "configure": the=20
configure trace displays "checking termios vs.=20
termio vs. sgtty: none". This is surprising=20
because I can find "termios.h" and a "sgtty.h" in=20
the system includes...

   I don't know how the tcl.m4 files work, so I=20
simply overrode, by hand, the makefile and added=20
the "-DUSE_TERMIOS" definition.

   Now the "-mode" option is available and I can=20
talk to my device... So... I guess something has=20
to be fixed in "configure" so that=20
"-DUSE_TERMIOS" is set...

   Another problem that I encountered was that tcl=20
would hang on "open /dev/tty.USA28213P1.1". I=20
found a workaround doing "open=20
/dev/cu.USA28213P1.1 {RDWR NONBLOCK}". I am not=20
sure if this reflects a bug or if it is normal...

   Just to let people know...

     Fran=E7ois

-- 
______________________________
=46rancois Berard
http://iihm.imag.fr/fberard/
IIHM, CLIPS-IMAG
http://iihm.imag.fr/

Tel: (+33)476 514 365
=46ax: (+33)476 446 675