Design and Implementation of Bootloader Based on CCP Protocol

In order to succeed in updating ECU program without specific downloader , this paper designed and developed a Bootloader based on CCP protocol , which has the advantages of high flexibility, good portability.This system uses three steps - import of Bootloader ,operation of the Bootloader and import of new ECU program - to realize online program upgrade for freescale chip MC9S12P64 .Finally, this thesis do the function and performance test. And the result shows that this Bootloader system can upgrade program stably and reliably, meeting the design requirements.