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Communication method for updating program of dual-mcu architecture system

A technology of system update and communication method, applied in the field of communication, can solve problems such as inability to implement SMCU refresh upgrade, inconvenient software upgrade, etc.

Active Publication Date: 2018-06-19
LIANCHUANG AUTOMOBILE ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main disadvantage of the above two methods is that it is impossible to realize the online refresh and upgrade of the SMCU software in the CAN network environment of the vehicle. The external network port or plug-in for programming is not reserved for SMCU, which is very inconvenient for software upgrades

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  • Communication method for updating program of dual-mcu architecture system
  • Communication method for updating program of dual-mcu architecture system
  • Communication method for updating program of dual-mcu architecture system

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specific Embodiment

[0062] A specific embodiment of the present invention includes:

[0063] The host computer, MMCU and SMCU are the three communication nodes of the network, and the MMCU in the transit position interacts with the flow control frame between the source node of the host computer and the target node of the SMCU.

[0064] Statistically complies with the communication instruction set of the SMCU program programming process, each node is filled with a flow control frame, and a complete flow control management mechanism is formulated.

[0065] According to the unit frame format definition method in the present invention, when the upper computer parses the code S19 file, the starting address, code, checksum and other effective information are extracted and filled into three corresponding unit frames.

[0066] For the filling process of an S19 record line as an example, see Figure 8 Shown:

[0067] The record behavior is in S1 format (the starting address has no extended page PAGE, th...

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Abstract

The invention discloses a communication method for updating a program of a dual-MCU architecture system, comprising: defining four types of unit frames with a 16-bit data width, which are used as the smallest unit when splitting and combining in the CAN-to-SPI communication mode; The flow control command of the node and the effective information of the S19 file are filled into the above frame types to form a unit frame, and then every four unit frames are combined to form a frame of CAN data field; the transit gateway splits the CAN data field, and each frame of CAN The data field splits and restores four unit frames, which are directly used as SPI frames for communication between dual MCUs. The communication terminal node analyzes the SPI frames to obtain the valid data contained in the original S19 file and updates the program. The communication method of the present invention conforms to the mutual information protocol between CAN messages and SPI frames in the multi-node networking of the dual-MCU architecture system, and can more effectively download the target code S19 (or Hex) file to the SMCU.

Description

technical field [0001] The invention relates to the communication field, in particular to a communication method for updating programs of a dual-MCU architecture system. Background technique [0002] like figure 1 As shown, the dual MCU control system often used in the structure of the automotive controller with dual MCU architecture collects signals independently from the main control chip (MMCU) and the auxiliary control chip (SMCU), and then passes the 16-bit data between the main and auxiliary The wide SPI communication method is used to complete the interaction and comparison of the two data, so as to realize the output jointly controlled by the dual MCU, and achieve a safer and more reliable control effect. At present, the MMCU upgrade program technology is mature and generally complies with Bosch CAN specification 2.0B. The host computer extracts the effective information in the program's object code S19 (or Hex) file, and completes the MMCU programming in the vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F8/65
Inventor 张善刘金行杨化方金灿龙田佰辉
Owner LIANCHUANG AUTOMOBILE ELECTRONICS
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