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Development of access controller based on dual-CPU design

In order to improve reliability and speediness of access control system, in hardware design, the shortcomings of access controller with a CPU is analyzed in this paper. The core module of the hardware system is designed based on two microcontrollers. In software design, main program and subprogram are programmed according to coordinate and independent mode. The card reader controlling, door magnetism and illegal entrance alarm, door monitoring and controlling, useful data communicating, and other functions are achieved by the modular design of access control system. Experiment results in real field show that dual-CPU design proposed in this paper improves greatly the reliability and work efficiency of the access controller.