Automobile instrument differential upgrading method based on USB transmission

Abstract

The invention discloses an automobile instrument differential upgrading method based on USB transmission, and relates to the technical field of automobile instrument electronics. The method comprisesthe following steps: connecting an upper computer to a USB interface of equipment, collecting and transmitting data at an MCU section by reading data of an SPI special function port, driving Norflashthrough an FBL program in an MCU, and brushing the data into Norflash; adding data integrity check areas to different Norflash partitions, and connecting an upper computer with a USB interface for upgrading, wherein the USB communication rate is 10 Mbit / s, and the speed can be increased by more than 5 times. Moreover, when communication is interrupted, an area failed in flashing can be selected, flashing is continued, restarting is not needed, waiting time after flashing failure is greatly shortened, and the communication efficiency is improved. And meanwhile, the updated part of the HMI is subjected to integrity check, so that the overall check time is shortened.

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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