This is an old revision of the document!
http://www.homautomation.org/2013/09/21/433mhtz-rf-communication-between-arduino-and-raspberry-pi/433 send from arduino to pi
http://www.petervis.com/Raspberry_PI/Raspberry_Pi_GPIO_Header/Raspberry_Pi_GPIO_Header_Pin_Protection.htmlprotect gpio with diode
https://www.fourtheye.org/armasm.shtml
https://wolfpaulus.com/journal/embedded/raspberrypi_boot
https://forums.raspberrypi.com/viewtopic.php?p=136266#p136266
https://pypi.org/project/RPi.GPIO/
http://hertaville.com/2012/09/28/development-environment-raspberry-pi-cross-compiler/ pi cross compiling with eclipse