Comment by KM6VV on May 30, 2012 at 10:48pm

Hi Thomas,

Interesting parts!  Looks like the shield is set up to mount in Legos? 

So you like simple range limits for the sensor?  I've always gotten the range (analog or digital), and then compared it to my limits. 

Alan  KM6VV

Admin Comment by Thomas J Coyle III on May 31, 2012 at 4:17am

@Alan,

Backing up is not as big a concern as going forward and MINDS-i seems to have optimized the IR sensor distance for their rover which is very similar to yours/mine. I have always said to apply KISS to all my projects if at all possible.

The MINDS-1 hardware looks similar to Legos is why the Shield looks like it has a Legos mounting capability.

Regards,

TCIII

Comment by Chris Cuddihy on May 31, 2012 at 8:52am

How do I load the APMrover firmware onto my APM2?  I can't find the info I need in the MP manual, and need a bit more than "just use the config tab". 

Thanks.

3D Robotics Comment by Chris Anderson on May 31, 2012 at 10:10am

Chris: Load it with Arduino.

Admin Comment by Thomas J Coyle III on May 31, 2012 at 11:09am

@Chris,

Does your comment above imply that the ArduRover code cannot be loaded via the Mission Planner also?

Regards,

TCIII

Developer Comment by R_Lefebvre on May 31, 2012 at 11:52am

Chris Cuddihy, unfortunately you cannot simply flash the firmware from MP at this time.  You will need to download the code, compile it with Arduino, and upload it to the board manually.  It's a bit of a learning experience.  But that's how it is for now.

Developer Comment by R_Lefebvre on May 31, 2012 at 11:57am

@Chris A.

That's the exact same chassis I put it on.  The SCX10 is not the best crawler chassis out there, since it compromises for scale instead of performance.  But it looks good doing it.  I've got a nice body on mine, fit the whole system right underneath.

Whoever it was that asked, the chassis is a bit heavy, but not too bad really.  I put a 35 turn crawler motor in mine, just the right speed, I think.  It'll just turn-over in a high speed turn, so it's fast enough, but it can also crawl nice and easy.

But for the best performance, a dedicated crawler would be best.

Developer Comment by R_Lefebvre on May 31, 2012 at 12:09pm

Wesley, your wheelchair motors are awesome!

I believe JL said that the differential drive can be used with the Rover code, by setting it up in "elevon mode" (since it's all based on the airplane code).

Comment by KM6VV on May 31, 2012 at 12:50pm

"Elevon mode".  Humm, I'll have to think about that. Mix elevator an ailerons (pitch and roll). 

My thinking is to just use a Roboclaw or Sabertooth type dual motor controller (instead of an ESC and servo) to do the mixing from throttle and steering commands into skid-steering (tank) motor control. 

Comments?

I guess I'll find out.  Otherwise, one can change the algorithm in the code and even send I2C or other serial (RS-232) commands to said motor drivers.  The motor drivers can then use encoders, and locally implement PID controls for two motor channels.  Maybe the code can already do some of this!  

I'd rather send I2C motion commands then have to generate R/C PWM signals for throttle and steering.  I'd suspect there would be some resolution loss in the steering PWM, no?

Just thinking out loud, certainly no criticism intended!  I'm merely looking to explore the implementation and possibilities!

Alan

Comment by Chris Cuddihy on June 1, 2012 at 8:18pm

I'm having a lot of trouble getting Ardurover code to complile.  Here is a snippet of the errors;

 

In file included from APMrover20b.cpp:69:
C:\Users\Chris\arduino\arduino-1.0\libraries\Fastserial/FastSerial.h:70:10: error: invalid suffix "px" on integer constant
In file included from APMrover20b.cpp:69:
C:\Users\Chris\arduino\arduino-1.0\libraries\Fastserial/FastSerial.h:94: error: stray '#' in program
C:\Users\Chris\arduino\arduino-1.0\libraries\Fastserial/FastSerial.h:274:3: error: invalid preprocessing directive #file_flipper
C:\Users\Chris\arduino\arduino-1.0\libraries\Fastserial/FastSerial.h:334:31: error: too many decimal points in number

C:\Users\Chris\arduino\arduino-1.0\libraries\Fastserial/FastSerial.h:1589: error: stray '#' in program

 

Also, I'm not sure I'm dowloading the libraries correctly from the GIT.  I am  using "save target as..., adding the file extension and saving it .   I have to do this for every file in the library.  Is there a better way?

 

Thanks,  Chris

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