General purpose interface bus (GPIB) controller based on field programmable gate array (FPGA)

Abstract

The invention discloses a general purpose interface bus (GPIB) controller based on a field programmable gate array (FPGA). The GPIB controller based on the FPGA is composed of the FPGA, a GPIB data bus driver, and a GPIB control bus driver. The GPIB controller based on the FPGA is characterized in that the model of the FPGA is Spartan-6, the Spartan-6 FPGA can realize a programmable communication interface (PCI) e interface through a hard core and also can realize PCI through a soft core; data transmitted by a main computer can be converted into data which can be identified by GPIB through control logic and be sent to the GPIB according to specified format; when the control logic receives the data of the GPIB, the control logic converts the data into data which can be identified by the PCI / the PCI e and sends the data to the main computer; and the control logic is realized by the use of Verilog hardware description language, flexible cutting and expanding can be realized according to needs of a client, and thus flexible cutting and expanding of a clamping plate function can be realized. The GPIB controller based on the FPGA has a higher flexibility and expandability, and hardware cost is low.

Description

Technical field [0001] The invention relates to a computer interface hardware, in particular to a GPIB controller based on FPGA. Background technique [0002] GPIB is a universal interface and bus standard in the field of automatic testing. It is used to connect instruments with GPIB interfaces to computers. This interface is generally used in high-end measuring instruments. Traditional GPIB controllers generally implement GPIB interface functions based on dedicated chips. For example, the GPIB interface cards of NI and Agilent are based on special chips such as NAT9914 or TNT4882 of NI to realize the GPIB interface function. Because these GPIB interface chips are expensive and the supply is restricted by NI, it is very disadvantageous for the cost control and mass production of companies that produce GPIB controllers. Summary of the invention [0003] The technical problem to be solved by the present invention is to overcome the technical defects in the prior art, provide a GP...

AI Technical Summary

Problems solved by technology

Due to the high price of these GPIB interface chips, and the source of supply is restricted by NI, it is very unfavorable for the cost control and mass production of enterprises that produce GPIB controllers

Images