CN106021160A - USB signal monitoring apparatus and monitoring method - Google Patents
USB signal monitoring apparatus and monitoring method Download PDFInfo
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- CN106021160A CN106021160A CN201610323920.6A CN201610323920A CN106021160A CN 106021160 A CN106021160 A CN 106021160A CN 201610323920 A CN201610323920 A CN 201610323920A CN 106021160 A CN106021160 A CN 106021160A
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- data
- unit
- usb
- transceiving unit
- data transceiving
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4072—Drivers or receivers
Abstract
The invention discloses a USB signal monitoring apparatus. The apparatus comprises a first data transceiver unit and a second data transceiver unit, wherein a data monitoring unit, a data flow direction arbitration unit and a USB communication establishment unit are connected in parallel between the first data transceiver unit and the second data transceiver unit; the other end of the first data transceiver unit and the other end of the second data transceiver unit are connected with a host and a USB device through a USB bus respectively; the USB communication establishment unit controls the first data transceiver unit and the second data transceiver unit according to a USB protocol so as to enable a USB communication system to enter a data packet transmission state; the data flow direction arbitration unit performs arbitration on a data flow direction according to states of the first data transceiver unit and the second data transceiver unit; and the data monitoring unit sends USB communication information and transmission state information to an upper computer. According to the apparatus, a USB signal monitoring function is realized without influencing the reliability and communication speed of the USB system.
Description
Technical field
The present invention relates to information science technology field, particularly relate to a kind of usb signal monitoring device and monitor method.
Background technology
The superiority of USB technology is more and more obvious, supports that the equipment of USB technology gets more and more, the monitoring of USB communication system
Third party can be allowed to obtain main frame with the Content of communciation between USB device, for supporting that the equipment of USB technology provides information security to protect
Barrier.
Usb signal is received circuit and is directly connected in parallel between main frame and USB device by existing usb signal monitoring technique
On usb bus, receive circuit by usb signal and observe the communication process on usb bus.This solution is total to USB
Line introduces extra load, affects the signal quality on usb bus, and the communication cable between main frame and USB device is relatively
When length or long-time communication, transmission may be failed.
Summary of the invention
For the problems referred to above, the present invention provides a kind of usb signal monitoring device, is not affecting USB system reliability and communication speed
In the case of degree, it is achieved usb signal monitor function.
A kind of usb signal monitoring device, including the first data transceiving unit, the second data transceiving unit, described first data are received
It is connected with data decryptor unit, data flow direction arbitration unit and USB communication side by side between bill unit and the second data transceiving unit to build
Vertical unit；The other end of described first data transceiving unit and the other end of described second data transceiving unit are divided by usb bus
Lian Jie main frame or USB device；Wherein said first data transceiving unit and the second data transceiving unit are believed for usb bus
Number reception, transmission and the control of usb bus terminal resistance；Described USB communication sets up unit according to usb protocol control
Described first data transceiving unit and the second data transceiving unit, make USB communication system enter the state of packet transmission；Described
Data flow direction arbitration unit is according to described first data transceiving unit and the state of the second data transceiving unit, the side to data stream
To making arbitration；USB communication information and transmission state information are sent to host computer by described data decryptor unit.
Described first data transceiving unit and the second data transceiving unit all include usb signal transmission circuit and control logic circuit.
Described data decryptor unit includes data reception module, data buffer circuit and interface circuit, described data reception module with
Described data buffer circuit connects, and data are entered described data buffer circuit, described data buffering electricity by described data reception module
Road is connected with described interface circuit.
Described data buffer circuit is dual port RAM or the buffer circuit being made up of trigger or latch.
Described data decryptor unit includes data reception module, moderator, memory device and interface circuit, described data reception
Block, described moderator and described interface circuit are sequentially connected with, and described moderator is also connected with described memory device.
It is programming device that unit is set up in described data decryptor unit, described data flow direction arbitration unit and described USB communication,
Described first data transceiving unit and the second data transceiving unit are external usb signal transceiving chip.
Described programming device is the one in FPGA, CPLD, EPLD, GAL, PAL.
Unit, described first data are set up in described data decryptor unit, described data flow direction arbitration unit, described USB communication
Transmit-Receive Unit and the second data transceiving unit are integrated on an asic chip.
The present invention also provides for a kind of method carrying out signal monitoring based on above-mentioned usb signal monitoring device, a kind of usb signal prison
Listen method, after the data that usb host sends are received by described first data transceiving unit, through described data decryptor unit,
Described USB communication is set up under unit and the control of described data flow direction arbitration unit, described second data transceiving unit be sent to
USB device, or USB device send data by described second data transceiving unit receive after, through described data decryptor list
Unit, sets up under unit control at described data flow direction arbitration unit and described USB communication, by described first data transceiving unit
Be sent to usb host, described data decryptor unit the first data transceiving unit and the second data transceiving unit are received whole/
Part USB communication information and transmission state information are sent to host computer.
The present invention is not in the case of affecting USB system reliability and communication speed, it is achieved usb signal monitor function.
Accompanying drawing explanation
Fig. 1 is the theory diagram of usb signal monitoring device；
Fig. 2 is first (or second) data transceiving unit structure chart in usb signal monitoring device embodiment；
Fig. 3 is data decryptor cellular construction figure in usb signal monitoring device embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, to this
Bright it is further elaborated.Should be appreciated that specific embodiment described herein, and need not only in order to explain the present invention
In limiting the present invention.
As it is shown in figure 1, the present embodiment usb signal monitoring device include the first data transceiving unit, the second data transceiving unit with
And unit, data flow direction arbitration unit, data decryptor unit are set up in the USB communication connected arranged side by side between the two, the first data are received
The other end of bill unit connects main frame by usb bus, and the other end of the second data transceiving unit is then connected by usb bus
USB device.It is of course also possible to the first data transceiving unit connects USB device, and the second data transceiving unit connects main frame.
After the present embodiment usb signal monitoring device is connected with main frame and USB device foundation, USB communication is set up unit and can be examined
Measure the connection of equipment and the speed type of equipment, by connecting the first data transceiving unit corresponding usb bus terminal resistance
Inform main frame, when USB communication set up unit detect that USB device disconnects time, corresponding by disconnecting the first data transceiving unit
Usb bus terminal resistance inform main frame.
USB communication set up unit by reset, shake hands, hang up and host wake-up regard as a kind of need forward signal transmission, i.e.
USB communication is set up unit and is detected that main frame is sent reset, shaken hands, hangs up and host wake-up signal by the first data transceiving unit
After, it being transmitted to USB device by the second data transceiving unit immediately, correspondence, when USB communication sets up unit by second
After data transceiving unit detects that USB device sends handshake, then it is transmitted to main frame by the first data transceiving unit.
When USB device carries out Remote Wake Up, send wake-up signal K and set up unit detect to usb bus, USB communication
By the first data transceiving unit transmission 3ms K to main frame after K, meanwhile, start to return K to USB device within 1ms,
Until EOP (End of Packet, end-of-packet) or high speed Idle state being detected by the first data transceiving unit.
USB communication is set up unit and is detected that USB device connects and identify the speed of equipment, then by the second data transceiving unit
Velocity information is informed main frame by the pull-up resistor of the first data transceiving unit or hypervelocity interface.If USB device is at full speed
Then enter state of shaking hands at a high speed, shake hands and after terminating, enter the USB bag transmitting state of corresponding speed；If the USB device connected is not
It it is the USB bag transmitting state being then directly entered corresponding speed at full speed.After entering USB bag transmitting state, when unit is set up in USB communication
Detect and inform main frame by the first data transceiving unit when USB device disconnects.
Under USB bag transmitting state, in the case of data flow direction arbitration unit receives data in learning data decryptor unit,
Reception according to the first data transceiving unit and the second data transceiving unit/transmission state receives data to data monitoring unit
Arbitration is made in transmission direction, and such as main frame sends packet and learns data decryptor list to USB device, data flow direction arbitration unit
Unit receives data, and the first data transceiving unit is in reception state, the second data transceiving unit is in non-receptive state,
So, it is to be understood that be to be sent to USB device from main frame by the data received in data decryptor unit.
The present embodiment usb signal monitoring device entirety can be integrated in an asic chip, or USB communication set up unit,
Data decryptor unit and data flow direction arbitration unit use programming device or other similar circuit, the first data transmit-receive list simultaneously
Unit and the second data transceiving unit all use external usb signal transceiving chip (such as USB3500, ISP1507, TUSB1310),
As described in Figure 2, usb signal transmission circuit meets existing USB to its structure, passes through USB with main frame or USB device
Bus connects；Control logic circuit and data decryptor unit, data flow direction arbitration unit, USB communication are set up can between unit
Use the interfaces such as UTMI/ULPI/PIPE.
Fig. 3 (a) is a kind of implementation of data decryptor unit, and data reception module completes the reception of data and writes twoport
RAM, transfers data to host computer by interface circuit, and interface circuit can be USB, SPI, I2C, serial ports or parallel port etc.
Interface；Also dual port RAM can be replaced with the buffer circuit that trigger or latch form.Fig. 3 (b) is another kind of implementation,
I.e. replace the dual port RAM in Fig. 3 (a) with moderator and memory device (as a example by single port RAM).
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned embodiment, also include by more than
The technical scheme that technical characteristic combination in any is formed.
Claims (9)
1. a usb signal monitoring device, it is characterised in that: include the first data transceiving unit, the second data transceiving unit,
Data decryptor unit, data flow direction arbitration list it is connected with side by side between described first data transceiving unit and the second data transceiving unit
Unit is set up in unit and USB communication；The other end of described first data transceiving unit and the other end of described second data transceiving unit
Main frame or USB device is connected respectively by usb bus；Wherein
Described first data transceiving unit and the second data transceiving unit are for the reception of usb bus signal, transmission and USB
The control of bus termination resistance；
Described USB communication is set up unit and is controlled described first data transceiving unit and the second data transceiving unit according to usb protocol,
USB communication system is made to enter the state of packet transmission；
Described data flow direction arbitration unit is according to described first data transceiving unit and the state of the second data transceiving unit, logarithm
Arbitration is made according to the direction of stream；
USB communication information and transmission state information are sent to host computer by described data decryptor unit.
Usb signal monitoring device the most according to claim 1, it is characterised in that: described first data transceiving unit with
Second data transceiving unit all includes usb signal transmission circuit and control logic circuit.
Usb signal monitoring device the most according to claim 1, it is characterised in that: described data decryptor unit includes number
According to receiver module, data buffer circuit and interface circuit, described data reception module is connected with described data buffer circuit, data
Being entered described data buffer circuit by described data reception module, described data buffer circuit is connected with described interface circuit.
Usb signal monitoring device the most according to claim 3, it is characterised in that: described data buffer circuit is twoport
RAM or the buffer circuit being made up of trigger or latch.
Usb signal monitoring device the most according to claim 1, it is characterised in that: described data decryptor unit includes number
According to receiver module, moderator, memory device and interface circuit, described data reception module, described moderator and described interface electricity
Road is sequentially connected with, and described moderator is also connected with described memory device.
Usb signal monitoring device the most according to claim 1, it is characterised in that: described data decryptor unit, described
It is programming device that unit is set up in data flow direction arbitration unit and described USB communication, described first data transceiving unit and second
Data transceiving unit is external usb signal transceiving chip.
Usb signal monitoring device the most according to claim 6, it is characterised in that: described programming device be FPGA,
One in CPLD, EPLD, GAL, PAL.
Usb signal monitoring device the most according to claim 1, it is characterised in that: described data decryptor unit, described
Data flow direction arbitration unit, described USB communication set up unit, described first data transceiving unit and the second data transceiving unit
It is integrated on an asic chip.
9. a usb signal monitor method, it is characterised in that: the data that usb host sends are by described first data transmit-receive list
After unit receives, through described data decryptor unit, set up unit and described data flow direction arbitration unit control in described USB communication
Under system, described second data transceiving unit it is sent to USB device, or
After the data that USB device sends are received by described second data transceiving unit, through described data decryptor unit, in described data
Flow path direction arbitration unit and described USB communication are set up under unit control, described first data transceiving unit be sent to USB master
Machine, whole/part USB communication that the first data transceiving unit and the second data transceiving unit are received by described data decryptor unit
Information and transmission state information are sent to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610323920.6A CN106021160A (en) | 2016-05-16 | 2016-05-16 | USB signal monitoring apparatus and monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610323920.6A CN106021160A (en) | 2016-05-16 | 2016-05-16 | USB signal monitoring apparatus and monitoring method |
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| CN106021160A true CN106021160A (en) | 2016-10-12 |
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| CN201610323920.6A Pending CN106021160A (en) | 2016-05-16 | 2016-05-16 | USB signal monitoring apparatus and monitoring method |
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Cited By (1)
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| CN109359082A (en) * | 2018-09-17 | 2019-02-19 | 昆明理工大学 | A kind of real-time monitoring system of usb data based on FPGA and method |
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