Soft-based GPIB interface card

Abstract

The invention discloses a software-based GPIB interface card, comprising MCU, data bus driver, and control bus driver, and characterized in that: the MCU controls the data and control bus drivers to communicate with the GPIB bus by control logic; the MCU receives data from other interfaces and convert the data through the preset software into the data able to be recognized by the GPIB bus and sends the converted data through software to the GPIB bus in a controller capacity; when receiving the data from the GPIB bus, the MCU converts the received data into the data able to be recognized by other interfaces, and sends the converted data to other interfaces. And the invention has features of simple structure, low cost, and high performance / cost tradeoff. And it can make an automatic test system run, independent of the computer environment, conveniently connect with buses of other forms, and extend the automatic test system into embedded systems, enlarging the application range of the automatic test system.

Description

technical field [0001] The invention relates to a computer interface hardware, specifically a software-based GPIB interface card. Background technique [0002] GPIB is a general-purpose interface and bus standard in the field of automatic testing, used to connect instruments with GPIB interface and computers. The traditional GPIB interface card realizes the GPIB interface function based on a dedicated chip, such as: NI’s PCI-GPIB interface card and Agilent’s PCI-GPIB interface card are based on NI’s NAT7210 or TNT4882 and other dedicated chips to realize the GPIB master. Control interface function. To sum up, the traditional GPIB interface card has the following problems: the interface card depends on the computer and runs on a certain operating system (such as WINDOWS), it is difficult to use it in an embedded system, and it is difficult to realize interoperability among multiple systems . GPIB interface chips are expensive. It cannot be interconnected with other buses,...

AI Technical Summary

Problems solved by technology

In summary, the traditional GPIB interface card has the following problems: the interface card depends on the computer and runs on a certain operating system (such as WINDOWS), it is difficult to use in embedded systems, and it is difficult to realize interoperability among multiple systems

GPIB interface chips are expensive

It cannot be interconnected with other buses, and the application range is limited

[0003] With the rapid development and widespread use of automatic test systems, the use of the original GPIB interface card is subject to certain restrictions, such as embedded systems cannot use GPIB, and other buses cannot communicate with the GPIB bus, etc.

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