CN103246844A

CN103246844A - Progress protection card based on USB

Info

Publication number: CN103246844A
Application number: CN201310213509XA
Authority: CN
Inventors: 武仁杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-08-14
Anticipated expiration: 2033-06-03
Also published as: CN103246844B

Abstract

The invention relates to a progress protection card based on a USB (Universal Serial Bus), which comprises a USB interface, a USB interface unit, a bus interface unit and a CPU (Central Processing Unit), wherein the USB interface unit is connected with the CPU by the bus interface unit and connected with a USB interface of a computer, receives protected progress data from the computer, and transmits the data to the CPU through the bus interface unit, and the CPU reads the received data, judges whether the computer operates in a protected progress running state, and controls starting of the computer. The protection card can completely and reliably protect a protected progress.

Description

Process Protection card based on USB

Technical field

The present invention relates to a kind of Process Protection card based on USB.

Background technology

Management unit's (as city security bureau all office computers of the management whole city) or administrative authority's (as intramural network management center) need at user's's (managed object) computing machine software to be installed for ease of management.But installed software is often unloaded by the user or the end process, makes to manage perform practically no function (some is local because the work of this respect is not also carried out in this problem puzzlement).

Some department has used the way of process being protected with software in order to prevent user's uninstall or end process, but the security of itself is again a problem.In addition, some user starts computing machine with USB flash disk or portable hard drive, has also avoided the supervision of management software to the user.

Summary of the invention

At above the deficiencies in the prior art, the invention provides a kind of Process Protection card based on USB.This equipment is inserted on the USB interface of computer-internal, and when system did not move protected process, this equipment will be turned off computing machine automatically, thereby makes user's operational management person's installed software (process) of having to.

Purpose of the present invention is achieved through the following technical solutions:

Process Protection card based on USB; this protection card comprises usb interface unit; Bus Interface Unit; central processor unit; described usb interface unit is connected with central processor unit by Bus Interface Unit; described usb interface unit is connected with the USB interface of computer; described usb interface unit receives from the protected process data of computer and these data is transferred to central processor unit by Bus Interface Unit; central processor unit reads the data that receive, and judges whether computer is operated in protected running state of process and controls the unlatching of computer.

Described Bus Interface Unit is CH372 or CH375 chip.

Described central processor unit is the STC12C5A60S2 single-chip microcomputer.

The invention has the advantages that:

Equipment of the present invention can be to the process protection of protecting fully reliably.If user's Uninstaller or finish protected process, the computer that this equipment will use the user is automatically closed, and makes the user have to allow protected process normally be moved, thereby prevents that the user from unloading or the end process, plays the effect of protection process.

Description of drawings

Fig. 1: structure principle chart of the present invention;

Fig. 2: electrical connection diagram of the present invention.

Embodiment

Be illustrated in figure 1 as structure principle chart of the present invention; described Process Protection card based on USB comprises USB interface; comprise usb interface unit; Bus Interface Unit; central processor unit; described usb interface unit is connected with central processor unit by Bus Interface Unit; described usb interface unit is connected with the USB interface of computer; described usb interface unit receives from the protected process data of computer and these data is transferred to central processor unit by Bus Interface Unit; central processor unit reads the data that receive, and judges whether computer is operated in protected running state of process and controls the unlatching of computer.

Bus Interface Unit, central processor unit, described USB interface is connected with central processor unit by Bus Interface Unit.Described Bus Interface Unit is the CH372/CH375 chip.Described central processor unit is the STC12C5A60S2 single-chip microcomputer.

The usb 1 of user computer mainboard is connected to Bus Interface Chip CH372 chip 3 by data line 2 among Fig. 1, and described CH372 chip is connected with single-chip microcomputer STC12C5A60S2 with address bus 5 by data bus 4.Described STC12C5A60S2 single-chip microcomputer, wherein internal program memory (Flash) is with comprising be used to judging whether to receive data or receiving whether correct code of data, thereby the switch of control user computer, this single-chip microcomputer is connected with the shutdown row pin 7 of user computer.

Principle of work is:

1, the single-chip microcomputer back that powers on is transmitted data, initialization CH372 by data bus (D0 ~ D7) and control bus (KZ[0..4]) with CH372.After this can pass through USB mouth (P4) and user computer swap data.

If 2 protected processes are moved; CH372 can regularly receive the data that protected process is sent by driving; CH372 is that low level notice single-chip microcomputer has received data by making INT; (D0 ~ D7) gives single-chip microcomputer the data that receive from protected process under the control of control bus (KZ[0..4]) by data bus then.After single-chip microcomputer receives data, check whether the data that receive are correct.If data are correct, keeping the CLOSE pin is high level, the user computer operate as normal.

If 3 protected processes are moved to end or not operation, CH372 just can not receive the data that protected process is sent, and single-chip microcomputer does not just receive data yet.Single-chip microcomputer can not receive regularly that data or the data of receiving are incorrect, and then making the CLOSE pin is low level.When CLOSE is low level, there is electric current to pass through between 1,2 pins of optocoupler P1,3.4 of optocoupler P1 is connected.So user computer shutdown pin is dragged down, make shut down of computer because 1 pin of row's pin P3 connects the shutdown pin of user computer this moment.

Be illustrated in figure 2 as electrical connection diagram of the present invention, the P3(row among the figure in the usb interface unit of Process Protection card is female) be inserted on the USB row pin on the computer motherboard, be used for receiving the data from protected process.If the data that can not regularly receive data or receive are incorrect, send shutdown command.P1 in the usb interface unit of Process Protection card is row's pin of three pins, during use wherein pin be connected on the shutdown row pin on the mainboard, different computing machines connects different pins:

First kind, electricity (computing machine that has can arrange whether electricity is arranged, and namely whether shutdown back USB mouth can charge) is arranged after the shutdown of USB mouth, this computing machine meets 1(CHONGQI) pin (be labeled as on the circuit board ' E ');

Second kind, the USB mouth does not have electricity behind the computer shutdown, and the voltage between shutdown on computer motherboard row's pin and the ground is 5V, this 2 (5VCHONGQI) pin (be labeled as on the circuit board ' 5V ') that connects;

The third, the USB mouth does not have electricity behind the computer shutdown, the shutdown row's pin on the computer motherboard and the voltage between the ground are 3.3V, this 3(3.3VCHONGQI of connecing) pin (be labeled as on the circuit board ' 3.3V ').

If shutdown back USB mouth does not have, then single-chip microcomputer because and on the mainboard GND of USB row pin be connected to low level, for preventing start again after the shutdown, single-chip microcomputer is by triode link to each other with the computer shutdown pin (Q1 be the third situation, the triode when Q2 is second kind of situation).

The equipment that the present invention produces can move at the desk-top computer of multiple model, and concrete use is as follows:

1 starts computing machine, and the CH372/CH375 driver is installed, and the software (adding the incidental interface code of this equipment in this software) of desire protection is installed.

After 2 shutdown, insert this equipment at the USB of computer-internal row pin, draw the shutdown row pin on the computer motherboard, link to each other with this equipment;

3 restart computing machine, the protected software that operation is installed (this software is operation automatically generally), system's operate as normal.

The 4 protected software of unloading or end processes are calculated auto-shut-off.The Process Protection success.

On the other hand, for when the computing machine of the equipment of insertion is reinstalled system, opening the PC case, designed screening accessory.When screening accessory is received the USB interface of protection card introducing computing machine outside, protection card will receive the data of screening accessory, make computer system when not having protected process to move, can operate as normal.

Should be appreciated that the above detailed description of technical scheme of the present invention being carried out by preferred embodiment is illustrative and not restrictive.Those of ordinary skill in the art is reading on the basis of instructions of the present invention and can make amendment to the technical scheme that each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims

1. based on the Process Protection card of USB; it is characterized in that; this protection card comprises usb interface unit; Bus Interface Unit; central processor unit; described usb interface unit is connected with central processor unit by Bus Interface Unit; described usb interface unit is connected with the USB interface of computer; described usb interface unit receives from the protected process data of computer and these data is transferred to central processor unit by Bus Interface Unit; central processor unit reads the data that receive, and judges whether computer is operated in protected running state of process and controls the unlatching of computer.

2. the Process Protection card based on USB according to claim 1 is characterized in that, described Bus Interface Unit is CH372 or CH375 chip.

3. the Process Protection card based on USB according to claim 1 is characterized in that, described central processor unit is the STC12C5A60S2 single-chip microcomputer.