Instrument programmed control system and method supporting USBTMC protocol based on PCIe bus

Abstract

The invention provides an instrument programmed control system supporting USBTMC protocol based on PCIe bus, comprising a PCIe interface controller, a USB interface controller, a DMA controller, a high-speed FIFO, a single chip microcomputer and an EEPROM, wherein a firmware program in the single chip microcomputer is used for initializing a hardware circuit and supporting USBTMC protocol for mode configuration of the PCIe interface controller, the USB interface controller and the DMA controller and configuring various descriptors conforming to the protocol from an equipment for USB; PCIe2.0 protocol is adopted for communication between the PCIe interface controller and the COMe, a bus is in downward compatibility with the PCIe1.0 protocol; USB3.0 protocol is adopted for the USB interface controller and a host interface, the bus is in downward compatibility with USB 2.0 protocol, and the USB interface controller adaptively adopts the host access of the USB2.0 or USB3.0 protocol.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an instrument program control system based on a PCIe bus supporting the USBTMC protocol, and also relates to an instrument program control method based on the PCIe bus supporting the USBTMC protocol. Background technique [0002] USB has the advantages of plug and play, small interface size, fast transmission rate, etc., which makes USB favored by many manufacturers and users. USB interface has become one of the computer platform standard interfaces. The latest standard is USB3. 1. [0003] More and more instruments and meters in the test and measurement category use USB interfaces. Through this interface, computers can control instruments and meters, exchange data with instruments and so on. [0004] Computer-on-Module (COM) is a highly integrated board designed with CPU, chipset, memory and peripherals in one component. It needs to be used with a carrier board developed...

AI Technical Summary

Problems solved by technology

[0010] The present invention proposes an instrument program control system and method based on the PCIe bus supporting the USBTMC protocol, which solves the problem that the instrument using the COMe hardware platform cannot use the USB interface for program control because there is no USB slave device controller; solves the problem based on the ARM kernel hardware platform The problem of poor portability of the software and hardware circuits of the instrument implementing the USBTMC protocol; solve the problem that the program control of the instrument needs to transmit a large amount of data in real time

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