Method and system for dual-core DSP firmware upgrading based on CAN bus

A CAN bus and firmware upgrade technology, applied in the embedded field, can solve problems such as low efficiency, malicious theft of firmware upgrade programs, and non-existence of encryption functions, so as to improve stability and reliability, prevent upgrade failures, and improve update efficiency Effect

Active Publication Date: 2018-11-20
武汉高仕达电气有限公司
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AI Technical Summary

Problems solved by technology

With the expansion of production scale, the amount of terminal equipment increases, the workload of firmware programming increases, and the efficiency is low
[0004] At the same time, there is no encryption function in the traditional firmware programming method, and the firmware upgrade program is easily stolen maliciously, resulting in the leakage of technical secrets

Method used

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  • Method and system for dual-core DSP firmware upgrading based on CAN bus
  • Method and system for dual-core DSP firmware upgrading based on CAN bus

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Embodiment Construction

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0028] On the one hand, the present invention provides a kind of dual-core DSP firmware upgrade method based on CAN bus, as figure 1 shown, including the following steps:

[0029] Step 1, the server sends a query command to the terminal device through the CAN bus to check whether the DSP core of the terminal device to be upgraded is running in BootLoader mode, if so, perform step 2, otherwise modify the upgrade flag of the DSP core to be upgraded, and restart the DSP core, make it run in BootLoader mode, and then perform step 2;

[0030] The server delays for a period of time, usually 2 seconds, waits for the DSP core to restart, and then sends a query command to the terminal device through the CAN bus again to che...

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PUM

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Abstract

The invention relates to a method and a system for dual-core DSP firmware upgrading based on a CAN bus. The method comprises: a server determining a to-be-upgraded DSP core, and issuing a flash password and a to-be-upgraded file password; the DSP core performing cryptographic verification and feeding back a verification result; if the verification is passed, the server notifying the DSP core to erase a designated flash sector, and dividing an upgrade file into data packets and sending the data packets to a terminal device; the terminal device writing upgraded file data into a flash in the DSPcore, to complete firmware upgrade of the DSP core; determining whether another DSP core needs to be upgraded, if yes, the terminal device transferring control right of the CAN bus, and then upgradinganother DSP core; otherwise, ending upgrade of the DSP core of the terminal device. Through the CAN bus, the DSP core of the terminal device can be updated and controlled remotely without disassembling the terminal device, so efficiency is high. Encryption processing is performed while upgrading, and firmware program in the DSP core can be read and written only when the password is checked correctly, improving security of the firmware program.

Description

technical field [0001] The invention relates to the field of embedded technology, in particular to a dual-core DSP firmware upgrade method and system based on CAN bus. Background technique [0002] Dual-core DSP internally contains two DSP cores. For complex systems, different system tasks can be allocated to different cores, with fine division of labor, and can optimally balance performance, power consumption and cost. [0003] The traditional firmware programming method is that the server and the terminal equipment are programmed through a one-to-one connection with the JLINK emulator. Every time a DSP core is programmed, a connector needs to be inserted and unplugged, and it is necessary to go deep into the workshop and disassemble the terminal equipment before it can be programmed. Upgrade each DSP core. With the expansion of production scale, the amount of terminal equipment increases, the workload of firmware programming increases, and the efficiency is low. [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F8/65G06F8/61G06F21/31
CPCG06F8/63G06F8/65G06F21/31
Inventor 张智雄
Owner 武汉高仕达电气有限公司
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