ChipKIT Pi (Arduino Interface for Raspberry Pi) to “ChipKIT Pi for the Raspberry Pi 3, Zero, 2, B+, A+”

This may work well but I am having a problem finding literature on them. The Element 14 site isn't all that helpful especially when it is an older board. The 26 pin GPIO connector say a lot. Any help would be appreciated.

Works great with Arduino IDE + the chipkit Arduino IDE plugin. I haven't used it with an actual raspberry pi, instead I use it as a cheap PIC32MX250/270 dev board with standard arduino headers.

I haven't used it yet but it looks like it will come in handy.