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A usb HID virtual keyboard communication interface in a measuring instrument

A technology of communication interface and virtual keyboard is applied in the field of communication interface to achieve the effect of saving financial resources and labor costs

Active Publication Date: 2016-04-27
CHANGZHOU ZHIXIN PRECISION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a USBHID virtual keyboard communication interface in a measuring instrument, which solves the problem in the prior art that corresponding driver software must be installed when the data of many measuring instruments is transmitted to a computer

Method used

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  • A usb HID virtual keyboard communication interface in a measuring instrument
  • A usb HID virtual keyboard communication interface in a measuring instrument
  • A usb HID virtual keyboard communication interface in a measuring instrument

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Experimental program
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Embodiment approach

[0021] The specific implementation is as follows:

[0022] figure 2 , the model of the CPU is LPC2478. LPC2478 is a wide range of highly integrated microcontrollers, LPC2478 integrated USBdevicecontroller function. The pins provided by the CPU to the external USB interface are USB_D+1 and USB_D-1. R1 and R2 are USB data line protection resistors, and C1 and C2 are filter capacitors. R3 is a pull-up resistor. When the USB device is connected to the host computer, it will make the signal level of the USB_D+ line of the host computer become high, and let the host computer know that there is a USB device inserted. The lightning arrester U plays a protective role and controls the voltage on the data line within a reasonable range.

[0023] When the USBdevice interface of the test instrument is connected to the computer through a USB cable, the signal level of the USB_D+ line of the computer host becomes high, and the computer host starts to enumerate the USBdevice interface. ...

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Abstract

The invention provides a USB (universal serial bus) HID (human interface device) virtual keyboard communication interface in a measuring instrument. The USB HID virtual keyboard communication interface comprises a digital portion and a virtual keyboard communication interface. The digital portion completes computation and analysis, measurement results are transmitted to a computer host via the virtual keyboard communication interface, the digital portion comprises a CPU (central processing unit), and the virtual keyboard communication interface comprises a communication interface circuit. The USB HID virtual keyboard communication interface in the measuring instrument has the advantages that a driver and relevant application software which are provided by instrument manufacturers are not required to be installed on a computer, and data of the measuring instrument can be directly uploaded into the computer via the USB interface.

Description

technical field [0001] The invention relates to the field of communication interfaces, in particular to a USBHID virtual keyboard communication interface used in measuring instruments. Background technique [0002] At present, the interaction methods provided by many measuring instruments to users are based on the communication between PC-level software and instrument interfaces. That is, the customer first needs to install the software provided by the instrument manufacturer on the computer, the software communicates with the instrument through the GPIB or RS232 interface, the instrument transmits the measurement results to the computer software, and the computer software saves the data to EXCEL or TXT text files, etc. [0003] The disadvantage of the above solution is that the customer must install the driver and related application software to run the software provided by the instrument manufacturer. Moreover, with the popularization of the WIN7 system, the software and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/038
Inventor 刘坤
Owner CHANGZHOU ZHIXIN PRECISION ELECTRONICS