ANALYSIS OF RT-THREAD CONTEXT SWITCH MECHANNISM BASED ON CORTEX -M4 KERNEL

RT-Thread is a domestic embedded real time operating system with open source. Based on Cortex-M4 kernel, the process of RT-Thread context switch through the PendSV interrupt was analyzed, and the implementation mechanism of context switch was deeply studied from the assembly instructions, which provided a reference for further understanding the implementation of kernel scheduling mechanism, and the technical basis for the application and promotion of RT-Thread.