CompactPCI communication card

Abstract

The invention discloses a CompactPCI communication board used for fields such as industrial control, data transmission, signal acquisition and image processing, which comprises a DSP, a CPLD, a dual-port RAM, and a PCI interface chip, wherein the DSP is used as a central processing unit of a local end, the CPLD is used for finishing local address assignment, bus control and interruption arbitration work, and the PCI interface chip is utilized to convert a PCI electrical communication protocol into a protocol which can be used for the reading of a device of the local end; a data bus at one end of the dual-port RAM is connected with a data bus of the DSP; an address bus and a control bus of the DSP are accessed into the CPLD, a data bus and an address bus of the local end of the PCI interface chip are connected with the other end of the dual-port RAM, and a control bus of the local end of the PCI interface chip is accessed into the CPLD; and data, address and control pins of a PCI end of the PCI interface chip are accessed to a PCI bus. The CompactPCI communication board has the advantages of simple structure and strong universality.

Description

technical field [0001] The invention relates to a communication board that can be widely used in the fields of industrial control, data transmission, signal acquisition and image processing. Background technique [0002] At present, most PCI boards on the market use a central processing unit plus an ASIC chip architecture. The ASIC chip is independently designed and developed by the manufacturer, and then processed by the chip manufacturer. This kind of solution has strong pertinence, high integration and good stability, and can reduce costs for large-volume users, but its versatility is not strong, and its development cost is too high for small-volume products. Most of the independently developed boards use CPU (such as ARM single-chip microcomputer or DSP processing chip, etc.) plus FPGA (field programmable gate array) plus PCI general interface conversion chip, which is a common architecture, with simple structure and strong versatility. Small-scale development costs Low...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a CompactPCI communication board with simple structure and strong versatility in order to overcome the defects of complex hardware circuit design, difficult modification and low versatility in existing communication boards

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