EEPROM data writing method

Abstract

The invention provides an EEPROM data writing method. The EEPROM data writing method includes the steps that firstly, a written initial address is an effective address of an EEPROM, and when the total length of data to be written is not larger than the effective length from the initial address to the highest address of the EEPROM, the second step is executed, or else the method is stopped; secondly, the data to be written are preprocessed and transmitted to the EEPROM in batches; thirdly, the EEPROM writes the received data to be written into the EEPROM. By the adoption of the method, the data to be written are preprocessed and transmitted to the EEPROM in batches, the EEPROM sequentially writes the received data to be written in the EEPROM, and the automatic page turning phenomenon in the data writing process of the EEPROM is avoided; due to the fact that the data to be written are transmitted in batches, the EEPROM writes the data in one batch when the data are transmitted every batch, efficiency is improved, and the problem that the EEPROM writing hardware efficiency is low due to the fact that certain time is delayed after one byte is transmitted every time is solved.

Description

technical field [0001] The invention relates to the technical field of flood attacks, in particular to a method for writing EEPROM data. Background technique [0002] EEPROM (Electrically Erasable Programmable Read-Only Memory) is a user-changeable read-only memory, which can be erased and reprogrammed by a higher than normal voltage, so EEPROM is widely used. [0003] EEPROM has a feature that page flipping occurs when writing data. For example, the storage space of an AT24C02BN EEPROM chip is 2kbit, which is 256byte. AT24 is divided into 32 pages, and the length of each page is 8byte. If data[8]={0,1,2,3,4, 5, 6, 7}, after completion, the content of the first page is: 0x0~0x7: 3, 4, 5, 6, 7, 0, 1, 2. After the EEPROM calls the I2C write interface, the address of the current page will be incremented by 1 every time a byte is transmitted, and the address will return to the top of the current page after the last byte of the current page is transmitted. No matter how many b...

AI Technical Summary

Problems solved by technology

Based on the page write flip phenomenon of EEPROM, if data is transferred to EEPROM in batches through I2C, it will not be able to write page by page

In addition, after the EEPROM receives the data transmitted by I2C, the hardware needs a certain amount of time to write

Therefore, if only one byte is transferred each time I2C is called, on the one hand, repeated calls will increase the I2C occupancy rate and time;

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