This is a port of FreeRTOS as Arduino libraries. The documentation for FreeRTOS is located here: http://www.freertos.org/ FreeRTOS is version 8.2.3 These libraries were tested with Arduino 1.6.5 for AVR boards, Arduino 1.6.4 for Due and the 1.26 version of the Teensy 3 software. To install these libraries and run the FreeRTOS examples, copy the included libraries to your libraries folder. A version of SdFat is included. For the current version go to: https://github.com/greiman/SdFat Please read FreeRTOS.html for more information. See FreeRTOS_API.html for API documentation. __malloc_heap_end must be defined to use dynamic memory in AVR tasks. Add this as the first line of setup(): // Insure malloc works in tasks __malloc_heap_end = (char*)RAMEND; See: http://www.nongnu.org/avr-libc/user-manual/malloc.html