OBD embedded equipment firmware upgrading method

The invention is suitable for the technical field of OBD embedded equipment firmware upgrading, and provides an OBD embedded equipment firmware upgrading method which comprises the following steps: providing a downloader with an OBD interface, and pre-storing an upgrading file in the downloader; after the downloader is connected with the target equipment through the OBD interface, obtaining the maximum CAN rate and the CAN packet size of the target equipment; sending the maximum CAN rate and the maximum CAN packet length supported by the downloader to the target device; adapting the hardware performance of the downloader and the target device; and sending the upgrade file to the target device. Therefore, the hardware performance of the target equipment and the downloader can be fully played, the firmware upgrading process is simple, and hardware does not need to be disassembled and assembled. 本发明适用于OBD嵌入式设备固件升级技术领域，提供了一种OBD嵌入式设备固件升级方法，所述方法包括提供一具有OBD接口的下载器，并向该下载器内预储存升级文件；下载器通过OBD接口连接目标设备后，获取目标设备的最大CAN速率及CAN包大小