A storage method and reading method for storing user data in flash

Abstract

The present invention relates to a storage method for storing user data into a Flash and a read method. The storage method is characterized in that: N to-be-stored user data with a fixed length are packaged into data packets, each data packet comprises a peltier, N user data and a check code from the front to the rear sequentially, and the data packets are sequentially stored in the Flash. The storage method provided by the present invention adopts a method of erasing one block for one time, and then dividing the block into partitions, and storing the user data sequentially, and when the partitions are full of the user data, erasing a block again, and sequentially storing the user data according to the partitions again, and according to such a cycle, the service life of the flash is greatly improved. Compared with the prior art, the present invention has the advantages that: the storage method provided by the present invention can preferably avoid an accidental loss existing in user data storage or avoid a premature failure of storage units, and can also correctly and quickly identify the last stored user data.

Description

technical field [0001] The invention relates to a storage method and a reading method for storing user data in Flash. Background technique [0002] Home appliance control boards often need to save some user data, such as control target temperature, working mode, and so on. In the early days, EEPROM was used to store user data. EEPROM has the advantages of fast storage speed and many times of repeated erasing (up to 1 million times), but it is expensive. With the development of MCU process technology, the space of ROM (hereinafter referred to as Flash) of MCU is getting bigger and bigger, and the production cost is low. The disadvantage of Flash is that the erasing speed is slow, and the number of repeated erasing and writing is small, most of which are less than 10,000 times. Because the Flash space is large, this is just to make up for the problem of fewer erasing times; for example, if 2bytes of user data are stored in 2K Flash space, it can be written 10 million times (...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a storage method and a reading method for storing user data in the Flash for the above-mentioned prior art, which can well avoid the problem of sporadic loss of data in the storage process of user data; the method It can well solve the problem that the data Flash is not used for a long time in the process of user data storage; this method can correctly identify and avoid "bad sectors"; this method can also correctly identify the last stored user data among many saved user data User data

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