Calibration communication method based on CCP protocol

Abstract

The invention discloses a calibration communication method based on a CCP protocol. CANApe is used as an upper computer. By modifying RAM data, online calibration parameters are modified. Meanwhile, CAN signals are monitored. Whether the CAN signals reach the target values or not after the calibration parameters are modified is seen online, the modified calibration parameters are downloaded into an ECU EEPROM after the target values are reached, and therefore the online calibration function is achieved. The method has the beneficial effects that the integration of the CCP protocol and the EPBsoftware is realized; online calibration of calibration signals is realized; a software engineer does not need to repeatedly modify calibration parameters in the software, and after the calibration personnel realize online calibration, the software engineer does not need a lot of tedious and equivalent work, so that the personnel utilization rate is improved; in general, the scheme is a set of rigorous, scientific, effective and feasible EPB online calibration method.

Description

technical field [0001] The invention relates to the technical field of calibration communication, and mainly relates to a calibration communication method based on the CCP protocol. Background technique [0002] The existing solution is to first verify the functions of the parts on the bench or the whole vehicle, find out the unreasonable items, and then modify the software after the analysis. After the software is modified, burn the software and burn it to a single piece or Burn it on the whole car, and confirm the modified effect again after burning. [0003] The deficiencies of the existing technology are: 1. The cumbersomeness of the process: every time a software engineer modifies the code, he needs to perform a series of tasks such as software synthesis, format conversion, and software burning. Due to the complexity of calibration conditions and customer requirements Repeatability, it may be necessary to modify the software multiple times and repeat the process of bur...

AI Technical Summary

Problems solved by technology

[0003] The deficiencies of the existing technology are: 1. The cumbersomeness of the process: every time a software engineer modifies the code, he needs to perform a series of tasks such as software synthesis, format conversion, and software burning. Due to the complexity of calibration conditions and customer requirements Repeatability, may need to modify the software multiple times and repeat the process of burning and verifying, the efficiency is very low

2. The work of calibration engineers and software engineers requires too high a connection: after the calibration personnel find a problem, they need to send the phenomenon and data to the software personnel, and the software personnel need to confirm the phenomenon again, and then modify the software according to the phenomenon. This process requires the connection of communication , It also takes time to connect. The calibration engineer cannot complete the calibration at one time, and needs to communicate repeatedly with the software personnel in the middle process and wait for the software engineer to complete the software modification.

3. The uncontrollability of the software version: due to the frequent modification of the software during the calibration process, especially the modification of the calibration parameters, multiple tests are required to find the best value, so there are many versions of the software. Can't tell the old and new versions, which will cause confusion in management

4. Poor workability in harsh areas: In winter, the weather and temperature are extremely low during calibration. Calibration personnel can only verify the function once a time. Sometimes it is necessary to connect to 4G waiting software outdoors and perform programming outdoors. These operations are difficult for calibration personnel. posed a greater challenge

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