Method for storing and managing data of electronic cash register and system
An electronic cash register and data storage technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as unsatisfactory large data volume, loss of commodity information and inventory data, and fast reading and writing speed. Achieve the effect of saving backup power supply battery, stable and reliable data storage, and fast read and write speed
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[0028] refer to figure 1 with figure 2 , an electronic cash register data storage management method, comprising the following steps:
[0029] S1. Erase the entire page of NOR FLASH memory to 0xFF state;
[0030] S2. N storage units are reserved for each commodity information and inventory data, so that M types of commodity information and inventory data form M data records of equal length, wherein the first storage unit of each data record stores commodity information, and the first storage unit stores commodity information. The two storage units store inventory data to form the initial inventory data of all commodity materials;
[0031] S3. When the inventory data corresponding to a certain commodity information changes, store the changed inventory data in the third storage unit of the X record, and so on until it is stored in the Nth storage unit;
[0032] S4. When the inventory data corresponding to a commodity data has been stored in the Nth storage unit of the X recor...
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