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Software => Software => Topic started by: E.Mk on November 23, 2010, 11:35:29 PM

Title: cannot set baud in Mac OS X + Axon
Post by: E.Mk on November 23, 2010, 11:35:29 PM
Hey all,

I have Axon + Macbook Air + Mac OS drivers from SiLabs combo and I didn't get far into the setting up the hardware.  I'm installing Debian in VirtualBox as I type this, but just out of curiosity, any Mac gurus here who can tell me why the following doesn't work?

Code: [Select]
stty -f /dev/tty.SLAB_USBtoUART 115200
this doesn't output anything, but then when I type in

Code: [Select]
stty -f /dev/tty.SLAB_USBtoUART
the speed is set to 9600 baud?

Any clue as to why stty doesn't work in Mac OS ('cause it works on my other computer running Ubuntu)
Title: Re: cannot set baud in Mac OS X + Axon
Post by: tranzparency on December 04, 2010, 04:27:19 PM
Noticing the same with my Mac running 10.6.5.  By leaving off the speed, it displays info about then connection.

At the bottom:
http://www.computerhope.com/unix/ustty.htm (http://www.computerhope.com/unix/ustty.htm)
Title: Re: cannot set baud in Mac OS X + Axon
Post by: E.Mk on December 05, 2010, 12:09:48 AM
Quote from: tranzparency on December 04, 2010, 04:27:19 PM
Noticing the same with my Mac running 10.6.5.  By leaving off the speed, it displays info about then connection.

At the bottom:
http://www.computerhope.com/unix/ustty.htm (http://www.computerhope.com/unix/ustty.htm)

Right, the question is why can't I set the baud rate by specifying it in my Mac OS X when that same command in linux(debian/Ubuntu) WILL set the baud rate to 115200.

Title: Re: cannot set baud in Mac OS X + Axon
Post by: tranzparency on December 05, 2010, 08:50:32 PM
Sorry, I should have been more clear.  I'm having the same issue and want to solve it as well.. If I have any luck I'll post back.
Title: Re: cannot set baud in Mac OS X + Axon
Post by: tranzparency on December 10, 2010, 05:30:14 AM
After much fiddling around, I reinstalled the SiLab drivers and screen worked just fine.  I was able to see all terminal text from my Axon. Do make sure your uC code is working and sending back appropriate data with another machine(PC with HyperTerm) to A/B the problem if you have the opportunity.  I only suggest becuase I'm a week into getting a smooth coding, make, and flash process going with X-Code.  Not there yet but getting closer.  So in the meantime, using XP through VirtualBox.

But I was able to:
# screen: /dev/tty.SLAB_USBtoUART 115200

And when done:
Ctrl-A [then typed]
exit [and hit enter]
Title: Re: cannot set baud in Mac OS X + Axon
Post by: Crunchy Theory on December 10, 2010, 11:04:34 AM
Cool, man - I finally got this working myself last night as well. Using an FTDI breakout board, though.

On OS X, the command in Terminal is: screen -U tty.usbtoserial [xxxxxxx] [38400]

where [xxxxxxx] is the device name and [38400] can be whatever baudrate your microcontroller is set to. You can check your devices under /dev once you install the mac driver for your chip and reboot the machine. Of course, the device won't show up in /dev if the chip is connected to the mac.

Hit Ctrl-A then Ctrl-\ then 'y' to exit screen.