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Sat, 02 Dec 2006
one last set of firmware changes (120206 firmware)

We are going to wrap up this version of firmware, so the SRV_protocol is now frozen, at least for this release. We made these final changes -
  • the flash memory commands have been simplified to just "zw" and "zr", and up to 1024 bytes can be written or read, with the data terminated by a null (\0). internally, the flash sector is actually 8192 bytes, so we can increase the 1024 byte limit if we get any user requests. also, for testing these commands from the keyboard, since some keyboards won't generate a null character, you can terminate the "zw" data string with a ^A (control-A), and that will be processed as a null (e.g. "zwthis is a test of writing to the srv-1 flash memory^A" then confirm the flash write with "zr")

  • the INPUT command in BASIC has been activated, and it's a simple non-blocking read - it just looks for a single character from the serial channel (radio), and if a character is found, it is stored in the 'X' variable. if nothing is found, then X is set to 0

Here's a variation of the previous BASIC example that uses the INPUT command - the program will continue to loop until the INPUT command receives a character via the serial port / radio :

COLORCAP 1 25 55 1 8
100 IMGCAP
SCAN 1
PRINT X,Y,Z
INPUT
IF X = 0 THEN GOTO 100
END

Here are the latest download links -

Posted Sat, 02 Dec 2006 16:11 | HTML Link | see additional stories ...


Webots 5.1.11 from Cyberbotics will include support for SRV-1

The upcoming release of Webots 5 will include full 3D simulator support for the SRV-1, including camera and IR sensors, realistic physics for the dual-motor tread drive, and SRV_protocol commands. Cyberbotics has done an amazing job in modeling the SRV-1, as can be seen from this video (click on the image) -



For more information on Webots, visit the Cyberbotics website

If you have trouble accessing the video, there's a version posted on YouTube -
    http://youtube.com/watch?v=6N2EMP_u5AM
(thanks to Prof Doug Blank of Bryn Mawr College / IPRE)

Posted Sat, 02 Dec 2006 15:44 | HTML Link | see additional stories ...