I'm looking to get pd up and running either under this BSP,
http://emcraft.com/products/343 or some versions of Debian on ARM, as a step toward running it in a family of Eurorack synthesizer modules that use the same processor, including this one of my design which is getting some favorable attention now.
https://youtu.be/Li5-V0g5Upk.
Right now it's hard-coded in C. The idea is that pd will streamline spinoff modules and alternate firmware.