Processing method for data transceiver of DVR

XV Min

(Hikvision Digital Technology Co.,Ltd,Hangzhou 310052, China)

Abstract: Aiming at the issue that full duplex was not supported by the RS485 serial port on economical DVR models, and to realize the simultaneous controlling and operating of peripheral equipment such as keyboards or analog domes, a multithreadbased software method was designed to implement full duplex communication on half duplex hardware. The introduction of the method was followed by the implementation design,the experimental results and analysis as well,and the actual yield came in the end. The results indicate that this method is easy to implement, costefficient, lowdelay, solves problems in practical application, and brings about economic benefits as well.

Key words: full duplex communication; half duplex hardware; digital video recorder; multithreading