System and method for programming flash memory

Abstract

The invention discloses a system for programming a FLASH memory. The system comprises a software downloading module, a PC (personal computer) interface module and a CPLD (complex programmable logic device) module, wherein, the software downloading module is connected with the PC interface module through a JTAG (joint test action group) interface and a FLASH programming interface and is used for sending a CPLD programming file and BOOT FLASH programming data to the PC interface module; the PC interface module is connected with the CPLD module through the JTAG interface and the FLASH programming interface and is used for providing a connecting channel between the software downloading module and the CPLD module; and the CPLD module is used for running the CPLD programming file and writing the BOOT FLASH programming data into a BOOT FLASH. The invention further discloses a method for programming the flash memory. The system and the method have the advantages of strong generality and simplified programming process, and are stable in use.

Description

technical field [0001] The invention relates to the field of embedded systems, in particular to a system and method for programming flash memory (FLASH) in the embedded system. Background technique [0002] In an embedded system, all processors on a single board need to be started in a certain way, which can be simply divided into two types: bootstrap startup and slave startup. In an embedded system, the main control processor generally needs to be bootstrapped to start, and the non-main control processor adopts a slave start mode. The bootstrap startup of the main control processor means that after power-on reset, the startup code is automatically read and run from the boot flash memory (BOOT FLASH), and the startup is completed; the slave startup of the non-master control processor refers to the startup of the main control processor. After completion, the startup code of the non-master processor is downloaded to the non-master processor, and the non-master processor start...

AI Technical Summary

Problems solved by technology

In this way, the FLASH socket connected to the BOOT FLASH needs to be soldered on the board. However, if the BOOTFLASH chip is inserted and removed from the socket multiple times or the board vibrates and falls during transportation, the socket contact will be unreliable and the main control The processor cannot read the data in the BOOT FLASH, and cannot start bootstrapping; further, to perform programming through the FLASH burner, the board needs to be powered off first, and then the BOOT FLASH is unplugged from the board to perform programming. Finally, insert the BOOT FLASH into the board, and then power on and restart the board. The process is quite troublesome and greatly reduces the development efficiency.

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