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Chip Kit PI Need Help and Answers

screamingtiger

Hello,

 

Please see this reference for in numbers in these questions:

http://www.bing.com/images/search?q=raspberry+pi+2+pinout&view=detailv2&&&id=DDC258835F7FC179A7E918B047D6D3F4A9BA0E44&selectedIndex=0&ccid=lTBG%2bWrr&simid=607989261665632896&thid=JN.PDAAkxf%2fZ73CZywL1k%2fF9A&ajaxhist=0

 

1)  The RPI breakout does not seem to expose the serial pins of the RPI.  The pins are GPI pins 15 and 16 Or Pins 8 and 10 (these are the same depending which numbering system you use).  While I understand the PiCChip can communicate via serial to the Pi, What about other serial sensors I  may want to use?

 

2)  The I2C pins  SDA and SCL also do not appear to be exposed.  I may of found one port on the raspberry pi breakout section that is connected to SDA but its not in the spot I would expect?  The chipkit does not connect to the I2C bus unless I connect up the SDA and SLC pins.

 

3)  When I remove the ChipKit pi from the top of the raspberry pi and just connect I2C together and some power, it works as expected.  However there are 4 phantom devices that show up on the bus, for example there is a device with ID 4 but in my sketch uploaded I am using device ID 9.  What are these devices and they only show up after calling Wire.Begin();

 

 

So I guess my question is:  What is the raspberry pi breakout header for?  It does not appear to connect to any of the RPi pins on the bottom and it sucks up some critical pins I need access to on the RPi.  The only way I see to access them is to solder wires off the top where they poke the on the ChipKit Pi.

 

Thanks for any help you can provide.

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  • 0 in reply to screamingtiger

    After a weekend of testing the chipkit Pi, I have make progress and been set back at the same time.

     

    The data from I2C comes in differently on the chipkit.  I am sending 3 bytes of data but it says the chipkit received 6.

    ANother major issue I am having is the Servo library doesn't seem to work.  Loading up the "sweep sketch" I tried various pins and the servo doesn't move.  I tried everything I could.  The same sketch uploaded to an Arduino works as expected.

     

    I am going to look at a beta version of MPIDE for raspberry pi.  Then I may try a windows version.

     

    I am using 8/21/2014 build for the raspberry pi.

     

    I'm going to keep trying it but some support would be great.  ChipKit refers support questions to this forum.

     

    I may try to use just PWM outputs and calculate my own duty cycles to write out.