基于光纤的PC/104 ISA总线接口卡

基于光纤的PC/104ISA总线接口卡,以PC/104模拟工业控制现场控制器,并与FPGA接口合并为ISA总线接口.该接口采用16位数据线,10位地址线,并以非DMA方式提供信息.总线接口板卡负责从ISA总线上得到数据,再经并串转换,通过光收发一体模块发送数据帧到另一端的总线接口板卡上,同时提供另一段总线接口板卡的发送数据为PC104读取.该接口卡FPGA芯片内部VHDL程序含:ISA总线与FPGA接口、串行异步通信发送及接收模块.

PC/104 ISA Bus Interface Card Based on Optical Fiber

The controller in industrial controlling locates is simulated by PC/104 for PC/104 bus interface card based on optical fiber, and then combine with FPGA interface to be a ISA bus interface. The interface adopts 16-bit-wide data bus, 10-bit-wide address bus and provides information by non-DMA mode. The bus interface receives data from ISA bus, then after parallel-to-serial conversion, transmits the data frame to another bus interface by optical fiber transceiver module. At the same time, the bus interface provides the data frame transmitting by another bus interface for PC104. The VHDL program embedded in the FPGA chip includes: interface combine ISA bus and FPGA, serial asynchronous communication module for transmitting and receiving.