A Differential Updating Method of Automotive Instrumentation Based on USB Transmission

Abstract

The invention discloses a method for upgrading automobile instrument differentials based on USB transmission. The invention relates to the technical field of automobile instrument electronics. The present invention connects the host computer to the USB interface of the device, and reads the data of the SPI special function port in the MCU section. For data collection and transmission, the Norflash is driven by the FBL program in the MCU, and the data is flashed into the Norflash, and the data integrity verification area is added in different Norflash partitions, and the host computer is connected to the USB interface for upgrading. The USB communication rate is 10Mbit / s, the speed can be increased by more than 5 times, and when the communication is interrupted, you can choose the area where the flashing failed, and continue to flash without restarting, which greatly reduces the waiting time after the flashing fails, and at the same time updates the HMI Integrity verification is performed partly to reduce the overall verification time.

Description

technical field [0001] The invention relates to the technical field of automobile instrument electronics, in particular to a method for differentially upgrading an automobile instrument based on USB transmission. Background technique [0002] With the rapid iteration of automotive instrumentation, there are more and more display effects of instrumentation, picture elements, and theme resources also increase. However, most of the automotive instruments on the market, especially those below 12 inches, still use the traditional CAN to upgrade, and the upgrade speed is slow. Once the communication is lost during the upgrade process, it needs to wait for several hours for the upgrade process. In order to break this situation and meet the needs of manufacturers and users, there is an urgent need for a method that can achieve rapid upgrades. In the current market, the instrumentation of vehicles below 12 inches (7 inches, 8 inches or 10 inches) all use Norflash as HMI The storage ...

AI Technical Summary

Problems solved by technology

However, most of the automotive instruments on the market, especially those under 12 inches, still use the traditional CAN to upgrade, and the upgrade speed is slow. Once the communication is lost during the upgrade process, it needs to wait for several hours for the upgrade process.

In order to break this situation and meet the needs of manufacturers and users, there is an urgent need for a method that can achieve rapid upgrades. In the current market, the instrumentation of vehicles below 12 inches (7 inches, 8 inches or 10 inches) all use Norflash as HMI The storage and update of display resources are all through CAN. The CAN communication rate is 500kbits / s. The current HMI display resources are updated as a whole. The overall update time is longer, more than 1h, and the integrity of all HMI content is done. Verification, the overall verification time is about 1min. In the early stage of development, customers need to frequently update HMI display resources for debugging, which takes a long time to flash and write, and reduces R&D efficiency.

[0003] The current solution has the following disadvantages: First, it can only be upgraded through the OBD interface, and the CAN communication transmission rate is 500kbit / s, which is slow. Second, once the communication is lost, you need to start flashing again, and you need to wait again for 1- 2 hours, the third is that the instrument cannot be upgraded through the central control

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