嵌入式系统RTOS大全 (超清pdf原创编辑文档) 文中例举了全世界的嵌入式系统开发系统并作了简介. This is a list of real-time operating systems. An RTOS is an operating system in which the maximum time from an input stimulus to an output response can be definitely determined.
Threadx is a widely used RTOS. This is a very good book, the writter use simple languge and examples to introduce its basic knowledge. It's wroth to share with you!