RoboSavvy Forum

CM-5

2007-07-27T08:49:35+01:00

Thank you Billy...
cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Fri Jul 27, 2007 8:49 am

CM-5

2007-07-26T15:11:52+01:00

If you are going to do that, then just get rid of the CM-5 all together and control the servos directly from your PC.

You can buy the USB2Dynamixel or make one yourself. Look around for Arnaud's interface.

Statistics: Posted by billyzelsnack — Thu Jul 26, 2007 3:11 pm

CM-5

2007-07-26T13:49:40+01:00

instead of having gumstix, woult it be possible to make an online control over CM-5? so CM-5 just need to control the dynamixel while the whole program is run on a computer?
anyone have done this? I really stuck with RAM limitation of CM-5

Thank you.

cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Thu Jul 26, 2007 1:49 pm

CM-5

2007-07-25T02:41:35+01:00

Thanks again Jon,
It seems I have to convince my project coordinator.. hopefully, she will agree to use gumstix and usb interface....
thanks...

cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Wed Jul 25, 2007 2:41 am

CM-5

2007-07-24T17:05:56+01:00

The gumstix works great. I am running a server on mine, and sending messages to it from my PC over wifi, so I'm not really controlling it from the gumstix, but I could very easily if I wanted to go that route.

The USB interface is great - you don't even need any special drivers, beyond the normal serial port emulator. I basically open a serial port at 1000000 baud, and can talk to the Bioloid bus directly at full speed.

I have some info on my USB interface here:

http://www.bioloid.info/tiki/tiki-index.php?page=pc+usb

- Jon

Statistics: Posted by JonHylands — Tue Jul 24, 2007 5:05 pm

CM-5

2007-07-24T16:23:06+01:00

Hii..
Thank Jon...
It seems It will take more time to build it.
How did you find yours?

thank you for sharing..

cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Tue Jul 24, 2007 4:23 pm

CM-5

2007-07-24T15:43:30+01:00

Well, personally I would (and do) use something different. For a robot that you want to be fully autonomous, you could get one of the new gumstix verdex single board computers, and use the USB interface a few of us are using to talk to the bus.

The gumstix I use runs at 600 MHz, has 128 MB of RAM, and 32 MB of flash, for $169. You can get a lower model for $129, which has half the RAM and flash, and runs at 400 MHz.

- Jon

Statistics: Posted by JonHylands — Tue Jul 24, 2007 3:43 pm

CM-5

2007-07-24T13:48:26+01:00

Hi Jon,
Yep...It seems so...maybe I could add external RAM?or it is better to change the board?
Do have any idea ?
Thanks before.

cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Tue Jul 24, 2007 1:48 pm

CM-5

2007-07-24T13:19:50+01:00

The ATmega128 has 128K of FLASH, so I doubt you're anywhere near the size limit on that.

You're probably running out of RAM - the chip only has 4 KB of RAM...

- Jon

Statistics: Posted by JonHylands — Tue Jul 24, 2007 1:19 pm

CM-5

2007-07-24T12:53:14+01:00

Hi..
I try to develop my C code for walking gaits. But it turns out when I download my code onto CM-5 and run it, my code does not work properly.
The size of my code is 0x5CD5. I try to reduce my code,(some commands are disable) and reduce the size till 0x4749 then I run, my robot walks properly.
I think my code does not exceed the maximum memory usage for the ATmega128.
anyone can help....

cheers,

ryann2k1

Statistics: Posted by ryann2k1 — Tue Jul 24, 2007 12:53 pm