Directories: + The FreeRTOS/Source directory contains the FreeRTOS source code, and contains its own readme file. + The FreeRTOS/Demo directory contains a demo application for every official FreeRTOS port, and contains its own readme file. + See http://www.freertos.org/a00017.html for full details of the directory structure and information on locating the files you require. The easiest way to use FreeRTOS is to start with one of the pre-configured demo application projects (found in the FreeRTOS/Demo directory). That way you will have the correct FreeRTOS source files included, and the correct include paths configured. Once a demo application is building and executing you can remove the demo application file, and start to add in your own application source files. See also - http://www.freertos.org/FreeRTOS-quick-start-guide.html http://www.freertos.org/FAQHelp.html