Migration of ThreadX operating system on Cortex M processors

This thesis focuses on issues needing attentions during the migration process in the light of ThreadX and Cortex for their own characteristics, including different physical registers corresponding to seven models, the difference between the Cortex M processors and the previous ARM processor, thread context and interrupt context . A total of 5 assembly files need to be designed and 1 header file needs to be modified in this migration , and analyzes the details of migration process of ThreadX operating system on Cortex M processors. In the test, thread switching time of ThreadX is about 9us, which can meet the system's requirements on real-time.