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  • David Melendez September 19, 2012 at 3:08am

    Software PWM is not doable with RPi and Linux directly, because Kernel scheduling. You will need a PIC/Arduino to do that job

  • Earl March 9, 2012 at 10:51pm

    Ok, what can we do with an APM2, RPi,Vision sensor,xbee coms,mission planner, and a high altitude balloon to put it on.,8 ch rc/tx and some servos and cameras.also a 2m/440mhx transciever and packet software.

    Earl

  • Earl March 9, 2012 at 9:32pm

    And how long did I wait for my APM2.0 I just got 3 days ago ???

    Earl

  • Jay Bryon March 7, 2012 at 2:16pm

    3.5 Watts is somewhat significant, but for larger platforms not so bad.  That said, it's not really optimized for the task, kind of a multitool when all you want is a flat head screwdriver, and a small one at that.  

    But I could see this for a SAR drone, using predator (object recognition/tracking software, not the drone) and an high res camera to search for people.  At that point it's less an autopilot and more a flying vision computer.  

  • Chris Paulson March 6, 2012 at 7:37pm

    I think shane.sanford is dead on about how this fits into the existing AP system. The one thing that I'll add is that the interfacing legwork is done. You have Mavlink and ROS for any and all communications between a Raspberry PI type board and the APM. You can outsource some tasks, like telemetry, to the application processor and even free up the microprocessor to do a little bit more digital filtering or processing.

  • David Melendez March 6, 2012 at 1:25pm

    No extra board needed at all. I2C can be emulated with a kernel module.

  • Ellison Chan March 6, 2012 at 9:45am

    Ok, answered my own question.  Looks like the GPIO pins are accessible. They actually sell a breakout adapter for it on Ebay.  But sadly for a project made to engender "learning" it's very hard to learn and detail technical information about it on the Raspberry PI page.  There's not schematics or even pinouts easily accessible anywhere.  Definitely not in the spirit of open source.

  • Ellison Chan March 6, 2012 at 9:28am

    Ok, ok.  Sorry for the negativity.  From the technical point of view, one would have to run an RTOS on it.  RTLiniux would be great.  If I could ever get my hands on one, I'd just put my pololu 9dof board on it,  Does it have an accessible I2C?

  • MC March 6, 2012 at 6:44am

    Matt,

    Yes, I agree with you that one can find many high-level applications that can not be performed on Arduino. Vision based obstacle detection could be one of them. I assume, in order to use OpenCV on this card, the only way to input video signal is via USB interface; either using a USB video capture card (such as EasyCap -BTW do you know a better quality video capture device) or directly attaching a USB camera.

    • Is there any other method for video input to Raspberry-pi?
    • Does anybody know if those 26 GPIO pins can be used for PWM ?
    • Can we use GPIO pins for interrupt inputs?
    • Is there an audio input on Raspberry-pi?


  • David Melendez March 6, 2012 at 3:32am

    I find it perfect for low cost whole control system. I'm running my copter with a Fon Fonera 2201 router as brain and Wifi as radio link. (The lack of current stability is for my scratch custom control program :)). It is not all, because router is attached to an IP camera. All those things connected to the same LiPo. With a switched power regulator, there is no problem for too power consumption.

    With that board you will never run out horsepower with a very decent battery life

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