Category Archives: 1-Ground

Matlab/Simulink 2010b problem in Mac OS Snow Leopard

Since I have installed Matlab/Simulink 2010 in my mac I havent been able to use Simulink at all! The reason is that the menus in the simulink model do not show. How awkward is that? I’ve googled and searched in forums but couldn’t find anything similar. Here’s a pic showing the problem. Does anyone know how to solve this problem?

Screen shot simulink matlab 2010b

If I don’t find a solution to this ’till next week I will format my mac! auch!…

 

Configure Xbee with a mac

So far I haven’t found any software to configure the XBees like the X-CTU software (that only runs on Windows). That doesn’t mean we can’t configure the XBees using a mac or Linux. So, these are just a few notes to help me configure my XBEEs when I’m using my Mac. I thought it may be useful to you as well.

Follow these steps and you’ll get your XBee configured in a minute:

  • Connect your XBee to the USB port of your computer using the XBee Explorer USB from Sparkfun.
  • Open a terminal window and search for the serial device
    >> ls /dev/tty.*
  • This will show a list of the available tty. devices connected. Example
    /dev/tty.Bluetooth-Modem
    /dev/tty.usbserial-A8003WbK
    /dev/tty.Bluetooth-PDA-Sync
  • In this case we are interested in the /dev/tty.usbserial-A8003WbK (your’s will be similar)
  • I am assuming that the baud rate of the XBees is 38400.
    So to configure the XBee #1 type in the terminal

    >> screen /dev/tty.usbserial-A8003WbK 38400
    >> +++
    >> OK
    >> ATBD5        (baudrate = 5, or  38400 baud)
    >> ATID1111   (ID = 1111)
    >> ATDL11      (DL = 11)
    >> ATMY10    (MY = 10)
    >> ATWR        (write changes in memory)
  • This configures the XBee #2

    >> screen /dev/tty.usbserial-A7006vC8 38400
    >> +++
    >> OK
    >> ATBD5
    >> ATID1111
    >> ATDL10
    >> ATMY11
    >> ATWR
To close ‘screen’ press “control-A then control-\” and then “Y” . This closes the session.
  • Baud rates
    1 = 2400bps
    2 = 4800bps
    3 = 9600bps
    4 = 19200bps
    5 = 38400bps
    6 = 57600 bps
    7 = 115200 bps

 

Sources:

upgrading an eMac … and what else?

Macs are great! Even when they are old, like the eMacs.eMac

An eMac with 700MHz can be upgraded to Leopard (Mac OS 10.5 – this is the last build for PPCs) but some challenges arise. First, the CPU speed, then the DL DVD reader, etc. Nevertheless with some patience it is possible to upgrade. Here’s some links that show you how. Enjoy the ride!

Because I didn’t have much time left I ended up just installing Tiger (Mac 10.4) with the single DVD. Here’s another link to show you how to install 10.4 or any other OS with an external firewire drive.

http://guides.macrumors.com/Installing_Mac_OS_X_10.4_without_DVD

When I have more time I’ll upgrade the eMac to 10.5.