RAM and NVM hybrid memory-based dynamic automobile ECU data management method

A technology of dynamic management and mixed memory, applied in the direction of electrical digital data processing, input/output process of data processing, instruments, etc., can solve the problem that the writing operation should not be too high, so as to reduce the number of writing operations and prolong the service life Effect

Inactive Publication Date: 2017-09-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

However, NVM has a limit on the number of writes, so the write operation should not be too high

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  • RAM and NVM hybrid memory-based dynamic automobile ECU data management method
  • RAM and NVM hybrid memory-based dynamic automobile ECU data management method

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[0036] The present invention will be further described below in conjunction with the accompanying drawings, but it should be understood that these descriptions are only examples and not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0037] Such as figure 1 Shown is the system architecture diagram of the present invention, RAM and NVM are respectively directly connected with memory controllers as storage structural components.

[0038] Such as figure 1 As shown, a central processing unit (CPU) is connected to a memory controller, and the central processing unit can read data through the memory controller.

[0039] Such as figure 1 As shown, the sensor components of the car: coolant temperature sensor, intake manifold pressure and temperature sensor, wheel speed sensor, oxygen sensor, crankshaft sp...

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Abstract

The invention provides an RAM and NVM hybrid memory-based automobile electronic control unit (ECU) storage architecture and a dynamic ECU data management method on the basis of the storage architecture, and aims at prolonging the service life of NVMs. The method comprises the following steps of: on a system architecture, connecting an RAM and an NVM with a memory controller to realize a hybrid memory; in an automobile running process, recording a consecutive same frequency of a same type of data stored in the RAM by an RCU, and when the consecutive same frequency achieves a certain set value, reading the data into the NVM from the RAM; for the data stored in the NVM, comparing the read data with the data of the last time by the ECU, if the read data is same as the data of the last time, not writing the read data, and otherwise, writing the read data to cover the data of the last time and recording a consecutive different frequency; and when the consecutive different frequency achieves a certain set value, reading the data into the RAM from the NVM.

Description

technical field [0001] The present invention designs an automotive ECU data management method based on hybrid RAM and NVM storage architecture, in particular relates to a dynamic ECU data management method that can prolong the life of NVM, which is applied to automotive electronic control systems and belongs to the technical field of automotive electronics. Background technique [0002] The automotive electronic control system generally consists of three parts in terms of hardware structure: sensors, electronic control units (ECU) and executive agencies. When the car is running, each sensor continuously detects the working condition information of the car, and transmits the information to the ECU through the input interface in real time. When the ECU receives this information, it will make corresponding decisions and processes according to the internal pre-written control program, and output the control signal to the corresponding actuator through its output interface. After...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0638G06F3/0685
Inventor 詹瑾瑜桑楠杨峻欢郭新王峻龙李一心余佳雨李莹
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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