Introduction - If you have any usage issues, please Google them yourself
Under KEIL-MDK platform, freemodbus is built step by step and transplanted to STM32F103 single chip computer. This paper mainly explains which files are copied directly without any modification, which ported files need to be modified and how to modify them, and the matters needing attention in the process of modification. Finally, it reminds the matters needing attention when porting to MODBUS-RTU mode.