Design and realization of the automatic updating system for AVR single chip processor firmware

The automatic updating system for the firmware of AVR single chip processor of ATmega series was designed based on the application programming feature of the processor.The wire splice is simple between the host computer and target machine in the system which uses a usual serial communication and is encrypted in the software design to ensure the security of the data storage.This system makes possible an automatic on-site updating of the firmware of the single chip processor,thus appreciably cutting down the production cost.