Data storage and reading method for controller
A data storage and data reading technology, which is applied in the direction of protecting the stored content from loss, input/output to the record carrier, etc., can solve the problems of harsh electromagnetic environment, signal interference, etc., and achieve the goal of ensuring safety and stability and avoiding loss Effect
Active Publication Date: 2015-07-22
GUANGXI LIUGONG MASCH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method mainly for the problem that the electromagnetic environment of the current engineering machinery controller is bad and the single memory is easily interfered by the signal when storing data. Reading can avoid the loss of key data and ensure the safety and stability of engineering vehicles. Controller data storage and reading methods
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[0027] The hardware circuit of the present invention adopts two memory chips (IIC bus and SPI bus) of dual-bus communication, such as figure 1 As shown, neither memory 1 nor memory 2 work when there is no need to save data. When it is necessary to save data, the CPU enables memory 1 and memory 2 to work, as shown in the attached figure 1 shown.
[0028] The controller data storage and restoration method of the present invention includes a data storage step and a data reading step.
[0029] The data storage step is that the CPU maps the working data to be saved to at least two sets of independent and complete storage data and stores them in the memory;
[0030] The reading step is to read the data in the memory, and compare and match the data in pairs until two groups of matching stored data appear, and send one of the matched two groups of stored data to the data memory of the CPU; If there is no matching two sets of data in all the stored data, the data preset by the progr...
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The invention discloses a data storage and reading method for a controller, which is characterized by comprising a data storage step and a data reading step, wherein the data storage step is that a CPU (central processing unit) maps working data needing to be stored into at least two groups of independently complete storage data, and stores the data in a storage; the reading step is that the data in the storage are read, the data are compared and matched in pairs until the two groups of the consistently-matched storage data occur, and one piece of the two groups of the consistently-matched storage data is transmitted to the data storage of the CPU; in case that the two groups of the consistently-matched storage data are inexistent in all the storage data, then the data preset by a program in the previous program storage of the CPU are read; and the storage data are stored in at least two mutually independent physical storages, and at least one group of storage data is stored in each physical storage. The data storage and reading method has the advantage that data storage and reading are performed by adopting a plurality of storages with different communication mechanisms and different storage addresses, so that the loss of key data can be avoided, thus ensuring the safety and the stability of engineering vehicles.
Description
technical field [0001] The invention relates to a data storage and reading method for a memory of a controller of a construction machine, which is mainly applied to construction machines. Background technique [0002] At present, the construction machinery controller has a lot of important data that needs to be saved in real time, and can be read when the power is turned off again. The general method is to select a high-performance erasable external memory chip, verify the data (group), and store the verification code in the memory together. When reading data, check whether the check code matches the read data group, if it matches, the data (group) is considered correct, if not, it is considered that the data (group) is wrong. These methods have the following drawbacks [0003] 1. Data is susceptible to interference from bus signals. [0004] 2. Incorrect data cannot be repaired. Contents of the invention [0005] The purpose of the present invention is to provide a m...
Claims
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IPC IPC(8): G06F12/16G06F3/06
Inventor 马文宇蔡登胜孙金泉李璘赵明辉
Owner GUANGXI LIUGONG MASCH CO LTD