Arduino UNO/Duemilanove 2dof firmware

[prilad]

Hi, Guys.

I (with my friends) has created the port of alt. 2dof firmware to Arduino platform.
It must to work at all Arduino with atmega328p - UNO, Duemilanove, ( Nano not confirmed ).

WARNING !!! There are some communication errors for Arduino UNO with USB interface on ATmega8u2. I will try to resolve this problem
resolved in new firmwares

x-sim_arduino_uno_by_Ale.rar

New Arduino UNO/Duemilanove HEX files with baud rates 9600, 19200, 28800, 38400 and 57600

(7.87 KiB) Downloaded 2022 times

Here you can found soft for uploading HEX files to Arduino:
http://xloader.russemotto.com/

IMPORTANT: after flashing Arduino UNO you must unplug it from PC and then plug in again.

This port contains all features described in this thread ...
http://www.x-sim.de/forum/viewtopic.php?f=39&t=237
... with three changes:
- COM-port Baud now is 57600.
- LCD display is not supported
- Terminal is not supported (for parameters setting use xSimCTRL software)

Arduino_2dof_from_Ale.jpg (244.72 KiB) Viewed 28488 times

Connecting diagram

Here is the video with simple work demonstration:


PS: This is a project of small group of authors and testers from:
http://mal4x.ru/viewforum.php?f=6

Posted 12/01/2013

One more video - test with wiper motor.




UPDATE 24.01.2013

Have a good news. I found Sparkfun Opto-isolator Breakout.
https://www.sparkfun.com/products/9118

Opto-isolator.jpg (105.99 KiB) Viewed 27882 times

Two channel opto-isolator

Best regards,
Ale.

[vicpopo]

Hi Ale,

Could you explain the point for that you named '' galvanic isolation''

It's a component ?

Thanos developed a opto isolator board , it's the same princip with same components?

Regards

[prilad]

Could you explain the point for that you named '' galvanic isolation''
It's a component ?
Thanos developed a opto isolator board , it's the same princip with same components?
Regards

Yes. This is a board with galvanic isolations ( http://en.wikipedia.org/wiki/Galvanic_isolation ) for each control lines. It may be based on opto-isolators as 6N137 (and you can use Thanos opto isolators board). And it may be based on "transformer" isolators, like ADuM1400 (http://www.platan.ru/pdf/datasheets/analogdevices/ADuM1400_1401_1402.pdf)

[prodigy]

Link for dual h bridge i would love to use : https://www.sparkfun.com/products/10182

I've read some comments on this page and someone put this link:
http://dx.com/p/monster-moto-shield-for ... red-161274

It the same driver but a lot cheaper. Whats the catch?

[prilad]

Hi, BobBuilt.

so that i may change the pin out to suit this shield, plus having a shield that just clips on over the ard will make it alot easier for new commers to play with plus the shield is already isolated and protected, no boards inbetween.

I can to create the new version, pin-to-pin compatible to Monster Moto Shield. But you must to know that PWM1 and PWM2 on pins used by this Shield has only 8-bit resolution (instead the 10-bit on pins in current firmware). And why do you say, what this shield is "isolated" ? It's not true (as I understand from schematics).

Regards,
Ale

[prilad]

Hi, BobBuilt

in first you wrote:

plus the shield is already isolated and protected

and in second

The motor driver is protected internally same as the jrk to stop any power feedback or relating issues. As advised by Pololu who use the driver extensivly.

And I say, that this board has not any isolation, only protection. But this is not the same things. The POWER GROUND on this board connected to USB GROUND. I do not like this situation.

Didnt realize the diff in pwm pin outs, so even if hook this up with patching wires it wont work.
Please advise I can do a test.

Now connection diagram for my firmware used another Arduino pins. And you should make RIGHT connection to your Monster Shield by wire. And then you can test it.

Im eager been playing with a uno for a while now, just got lost in pid control. And suppose it wont be good to derate your firmware so we can use a bought shield.

By using Arduino IDE and sketches difficult to build a high performance "real time" firmware for x-sim. (IMHO) I wrote programm on C and assembler. It is not "arduino scetch"

[vicpopo]

Could you explain the point for that you named '' galvanic isolation''
It's a component ?
Thanos developed a opto isolator board , it's the same princip with same components?
Regards

Yes. This is a board with galvanic isolations ( http://en.wikipedia.org/wiki/Galvanic_isolation ) for each control lines. It may be based on opto-isolators as 6N137 (and you can use Thanos opto isolators board). And it may be based on "transformer" isolators, like ADuM1400 (http://www.platan.ru/pdf/datasheets/analogdevices/ADuM1400_1401_1402.pdf)

Thanks Ale,
I appreciate so much all your efforts to explain simply and with a lot of pedagogy all we ask you!!

Best Regards

Gilles

[tronicgr]

Optoisolation is good to have but some times could be expensive...

http://www.digikey.com/product-detail/en/ADUM1400CRW/ADUM1400CRW-ND/612551, price $8.30, but SMD

Or these http://www.digikey.com/product-detail/en/AD260AND-4/AD260AND-4-ND/617060, price $61.60, PDIP package.

Either way these are not even in stock!!!!


Thanos

[motiondave]

Optoisolation is good to have but some times could be expensive...

http://www.digikey.com/product-detail/en/ADUM1400CRW/ADUM1400CRW-ND/612551, price $8.30, but SMD

Or these http://www.digikey.com/product-detail/en/AD260AND-4/AD260AND-4-ND/617060, price $61.60, PDIP package.

Either way these are not even in stock!!!!


Thanos

so we wait till they are in stock then

[tronicgr]

Whatever