Integration of the Multiple Master Multiple Slave System (M3S) Using Digital Signal Processors

• Main Authors: Chiun-fan Chen, 陳俊凡
• Other Authors: 張艘
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/30372831927027014320

碩士 === 國立臺灣大學 === 電機工程學研究所 === 92 === The growing demand for devices designed for the severely handicapped led to the development of modular features for the open architecture Multiple Master Multiple Slave (M3S) system. M3S allows individuals suffering from cerebral palsy, paraplegia, or multiple sclerosis, and other physically debilitating illnesses greater autonomy by allowing them to access a wide range of devices tailored to a specific user, e.g., joysticks, keypads, head-control modules and speech recognizers. The design of the architecture offers a flexible system in which individual devices can be added or removed to accommodate specific needs, providing a two-level safety system for each device. The two levels are a central safety monitor and the two independent wired-OR safety lines connected to each device on the bus, and the system is configured such that in the event of failure, system shutdown can be independently enabled at each separate safety level. The prototype has been designed with the objective of building a versatile base model to allow addition or removal of modules by individuals with minimal technical expertise. Communications take place via the bus by means of preprogrammed analog or digital input devices. Safety-critical devices are hardwired with DMS circuitry to provide additional safety mechanisms independent of the CCM CAN bus control and the DSP watchdog. The ultimate NTUEE LAB302 CAN Monitor has been developed for a full M3S system supervision.