Embedded system for realizing software updating and software backup and implementation method thereof

Abstract

The invention provides an embedded system for realizing software updating and software backup. The embedded system comprises a microprogrammed control unit (MCU), a program memory, a data memory, a nonvolatile random access memory (NVRAM) and a chip selection logic module, wherein the MCU is internally provided with or externally connected with the data memory; the NVRAM is used for storing operating requirement data and is connected with the MCU through a signal; the program memory comprises an application program storage block and a set-up / common program storage block which occupy differentaddress space; the application program storage block comprises an application program storage block-page 1 and an application program storage block-page 2 which are mutually independent; and the chipselection logic module is used for validating the set-up / common program storage block at once after switching on, and validating the application program storage block-page 1 and the application program storage block-page 2 in an effective time sharing mode. The embedded system is suitable for adopting an 8-bit MCU embedded system, which can realize the software updating and the software backup ofthe embedded system at the same time.

Description

technical field [0001] The invention relates to the field of embedded systems, in particular to an embedded system for realizing software update and software backup and its realization method. Background technique [0002] With the development of the information industry, the embedded system with microcontroller (MCU) / microprocessor (MPU) as the core is more and more widely used. It is generally composed of four parts: embedded microprocessor, peripheral hardware devices, embedded operating system and user's application program, and is used to realize functions such as control, monitoring or management of other devices. Embedded systems are a combination of hardware and software. With the hardware unchanged, different functions can be achieved by running different software. In many cases, designers first design a general hardware platform and then design different software. , by replacing different software with different products to achieve different product functions, how...

AI Technical Summary

Problems solved by technology

The advantage of using this solution to implement software update is simple, but the disadvantage is that it does not support software backup, that is, the original software is erased when the software is updated, and then updated to new software. If the download fails, the system cannot run. The size of the program memory is limited (usually a few K to a dozen K), and the software to be downloaded should not be too large

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