摘要
提出了一种基于CPLD的全双工并行通信口的扩展设计方案,其功能是通过1个并行口实现多个并行口扩展,讨论了此扩展口通信过程中握手信号的变化规则。根据本方案,设计了1个能将1个并行口扩展为2个双工并行口的实例,实现了并行通信口的扩展,并给出了仿真波形。此扩展并行口的每个子口都可与另2个并行口进行双工通信工作。
An extension design scheme of the full- duplex parallel communication port based on CPLD was presented. This scheme could extend multi - parallel ports by a parallel port. The variation rules of the handshaking signal during extending port communication were discussed. Based on the proposed scheme, an example of extending one parallel port to two full - duplex parallel ports was given. Then the extension of parallel communication port was realized and the simulation result was also given. All sub ports of the extending parallel port can work with other two parallel ports.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2008年第5期98-102,共5页
Journal of North China Electric Power University：Natural Science Edition
关键词
并行通信
CPU)
双工通信
双工并行口
握手信号
parallel communication
CPLD
duplex communication
duplex parallel port
handshaking signal
