2011•Modern Electronics TechniqueRequires access

Method of Online Firmware Update for Door Control Unit in Shielded Door

Xiao Wang

Abstract

In order to realize the online firmware update of DCU(door control unit) in metro PSD(platform screen door),based on the boot program in chip,a method of downloading an initializing program with Flash Database through CAN(controller area network) bus to the random memory in chip is adopted,and the initializing program is used to solidify the self-designed boot program in the flash on chip by means of an initializing program to achieve the purpose that the PSA(panel of supervision and alarm) can update all DCU online.It can avoid the trouble of dismounting DCU because of the firmware update to safeguard the program copyright,but also providing a new method for online firmware update of DCU in metro PSD.

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Key concepts: Firmware, Initialization, Microcode, Embedded system, Control unit, Upload, Computer science, Chip