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How can a PIC18F4550 communicate with ROS?

asked 2012-06-05 03:40:46 -0500

Engineer gravatar image

Hello, I am using a PIC18F4550 microcontroller for controlling a stepper motor and a regular dc motor through their drivers (H-bridges). I was wondering if anyone knows a simple way to make ROS communicate with the microcontroller. I know that one way to do this is to buy an arduino chip and follow the tutorials on this website. Then write a simple code to make the arduino chip communicate with the PIC microcontroller. Unfortunately, due to budget limit and lack of time this is not possible. I would be really greatfull if anyone could help me soon.

Thanks in advance.

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answered 2012-06-05 04:36:32 -0500

dornhege gravatar image

Two ways:

  1. Implement the rosserial protocol on the PIC and use rosserial client to communicate with ROS. More generic and more work (you can probably reuse some code from rosserial_arduino).
  2. Implement your own simple protocol and write a client nodes that maps this to ROS. Limited to what you implement, but quick to do.
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answered 2012-06-05 12:25:00 -0500

Mr.EEPBppt gravatar image

I have made some robots with pics, and it would be great to interface them with ROS, I was wondering if there is a library (like ros.h in the arduino) for the microchip c30 compiler?

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answered 2012-06-05 06:37:52 -0500

Engineer gravatar image

Thanks, I will try the first method. But can you tell me if there is any chance that I would mess up the microcontroller if I implement the protocol in the wrong way, or by writting any other code wrong?

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I'm not really sure, what you mean with "mess up". Obviously you're changing code, but the serial line itself is kinda safe, if you send wrong data.

dornhege gravatar image dornhege  ( 2012-06-05 06:46:50 -0500 )edit

@Engineer please use the comments to follow up on posts and also accept @dornhege's answer so others know you got what you were looking for.

tfoote gravatar image tfoote  ( 2012-06-07 10:20:25 -0500 )edit

I haven't checked if his suggestion works. I decided that I will use an arduino chip to connect it with ROS and also connect it with the PIC. Seems to be easier

Engineer gravatar image Engineer  ( 2012-06-08 02:53:21 -0500 )edit

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Asked: 2012-06-05 03:40:46 -0500

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Last updated: Jun 05 '12