Angelo, As far as I know, there are very few people using RTEMS on a Raspberry Pi Zero (truly a shame to be honest). A few people here and there that I've found scattered through the mailing list archives, but a lot of their effort was put towards building the BSP foundation and not actually using it. The Google Summer of Code project had a few students work on implementing the BSP as well which is where most of the peripheral connectivity was done.
Most of the GPIO stuff that you'd expect has been finished. Pin control, I2C, and SPI all work. SPI could use some extra work however, but if you play around with it enough it'll go. I've been having all sorts of "fun" getting it working and seriously need to put together some documentation on what could be considered strange behavior and how to get it working in the first place since that isn't well documented. I don't think hardware PWM works unfortunately (not that I've tried). The boot SD card isn't mountable either. Can see it and read it, but mounting as part of the file system doesn't work. I've been meaning to take a crack at that but don't have the time. If you haven't run across it already Alan put together a guide a few years ago going over how to build and setup an RTEMS toolchain here http://alanstechnotes.blogspot.com/2013/03/rtems-on-raspberry-pi.html?m=1 for the RPi specifically. Just watch out for version numbers and git repo locations. Some things have been moved around since he made that blogpost but the RTEMS getting started page should patch the errors for you. The only projects that I know of using RTEMS on RPi are a kernel image project that Alan had worked on and the project that I am working on which is an active controlling flight computer for high power rockets. - Will B. _______________________________________________ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
