A Program Upgrading Mechanism for Peripheral Devices Based on Microcontroller Without External Memory

Abstract

The invention provides a method for remotely upgrading the program of the peripheral equipment of a single-chip microcomputer without an externally expanded memory. A master-slave device communication system, including a host device and multiple peripheral devices, in which a stable communication is established between the host device and each peripheral device through physical means (such as RS-232 / RS-485 / CAN bus, etc.) Connection, and the program design of the peripheral device adopts the BootLoader program to guide the main program to start. With the help of the storage space of the host, the communication channel between the peripheral device and the host is used. The two parties communicate according to the agreement agreed in advance, and the host recognizes it. And be controlled to realize the remote upgrade of the peripheral device program. The advantage of adopting the present invention is that there is no need to make any changes to the host hardware and peripheral hardware, and the whole mechanism is completed through the interaction of software and protocols, which has good versatility and strong expandability.

Description

technical field [0001] The invention relates to the field of single-chip microcomputer systems, in particular to a method for remotely upgrading the programs of the peripheral equipment of the single-chip microcomputer without externally expanded memory. Background technique [0002] For electronic products, the wide application of single-chip microcomputer system can be described as a household name. At present, with the continuous improvement of chip performance and application technology, especially the entry of ARM Cortex-M series 32-bit single-chip microcomputers, single-chip microcomputer systems are not only satisfied with traditional features such as low cost, low power consumption, and ease of use. Many advanced requirements are gradually put on the agenda, including intelligent man-machine interface, all-round remote upgrade function, etc., especially the latter, through which the firmware program can be updated online without taking back the product, Provide stro...

AI Technical Summary

Problems solved by technology

In this case, as an accessory device of the host device, the built-in storage space of the peripheral device is very limited, only enough to store its own program, and cannot leave enough space to store the backup program for remote firmware upgrade. use

And if you meet the usage requirements by adding additional memory, it will inevitably increase the cost of hardware configuration, and it is not advisable

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