lonworks bus and pc104 bus interface circuit

Abstract

The invention relates to a LONWORKS bus and PC104 bus interface circuit, which is used for high-speed communication between the LONWORKS bus and the PC104 bus. Including PC104 industrial computer and LONWORKS bus, its feature is that it also includes interface circuit FPGA and neuron chip, through the interface circuit FPGA, PC104 bus is connected with multiple LON bus nodes of LONWORKS bus, and the RAM in the interface circuit FPGA is used as the bus data buffer , IO port as PC104 bus interface. The present invention adopts FPGA as the bridge of PC104 bus and LON bus neuron node, program PC104 interface logic program inside FPGA, realize the data exchange between PC104 industrial computer and FPGA internal RAM; Select pins, select multiple LON nodes in turn, and the FPGA only exchanges data with the currently selected LON node. The invention simplifies the scale of the interface circuit, and the PC104 upper computer can simultaneously monitor multiple LON bus nodes through the bus interface circuit, realizes the function of the PC104 system simultaneously communicating with multiple LON nodes, and improves the transmission rate of the PC104 bus.

Description

Interface circuit between LONWORKS bus and PC104 bus technical field [0001] The present invention relates to an interface circuit, in particular to a LONWORKS bus and PC104 bus interface circuit. Background technique LONWORKS field bus (LON bus) is released local operation in 1991 by U.S. Echelon company Network, LON bus technology uses the open communication protocol LONTALK, which supports all seven-layer models of OSI / RM, The LONTALK protocol is implemented through hardware and firmware on the neuron chip, providing media access, transaction confirmation and peer-to-peer communication Serve. PC104 is an industrial computer system specially designed for embedded control, with miniaturized size, low power The characteristics of the bus form of consumption and stacking have been widely used in industrial control, aerospace, intelligent instrumentation, communication data Control, data acquisition and other fields. With reference to Fig. 3, document " the design ...

AI Technical Summary

Problems solved by technology

In order to overcome PC104 bus line and LON bus interface in the p

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