CN105930293A - Serial transceiving interface module and USB (universal serial bus) interface module shared port circuit and working method - Google Patents
Serial transceiving interface module and USB (universal serial bus) interface module shared port circuit and working method Download PDFInfo
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- CN105930293A CN105930293A CN201610421845.7A CN201610421845A CN105930293A CN 105930293 A CN105930293 A CN 105930293A CN 201610421845 A CN201610421845 A CN 201610421845A CN 105930293 A CN105930293 A CN 105930293A
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- interface module
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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
- G06F13/4004—Coupling between buses
- G06F13/4009—Coupling between buses with data restructuring
- G06F13/4018—Coupling between buses with data restructuring with data-width conversion
-
- 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
-
- 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
Abstract
The invention relates to a serial transceiving interface module and USB (universal serial bus) interface module shared port circuit and a working method, in order to solve the problem that peripheral interface modules of an embedded system are mutually independent and incompatible and cannot share connection ports. The shared port circuit comprises a single chip microcomputer and a USB port, the single chip microcomputer comprises a serial transceiving interface module, a USB interface module, an interface shielding unit, a detection unit and a master control unit, the serial transceiving interface module and the USB interface module are connected with the USB port, the interface shielding unit is connected with the serial transceiving interface module and the USB interface module so as to block communication of the interface module, the detection unit is connected with the interface shielding unit and the master control unit so as to detect the type of peripheral equipment interface modules connected into the shared port and sends detection information to the master control unit, and the master control unit is connected with the interface shielding unit and the detection unit so as to control the interface shielding unit according to the detection information sent by the detection unit.
Description
Technical field
The present invention relates to embedded system, more particularly, it relates to a kind of serial transceiver interface module and USB
Interface module common port circuit and method of work.
Background technology
Embedded system and the external world need by generalized device interface module alternately, such as A/D, D/A, I/O
Connected by generalized device interface module and sensor or other peripheral hardware Deng, processor, it is achieved processor defeated
Enter/output function.The function of each peripheral hardware usual only one of which independence, and the connection of peripheral hardware and processor depends on
According to interface module consensus standard, each independent, incompatible, it is impossible to share union joint, in like manner, and it is connected
Head with the use of port the most separate.But along with the development of usb protocol, usb interface module has become
For common interface module, most independent peripheral joints are also adopted by usb interface module, to meet and various intelligence
The connection of equipment needs.The such as Bluetooth adapter USB port by usb interface module grafting computer, real
Existing computer and the Bluetooth communication of other peripheral hardware.But for embedded system device, USB flash disk uses USB
Interface module, bluetooth or WIFI module need the serial transceiver interface module by performing respective protocol to connect
Processor, it is impossible to use usb interface module peripheral hardware on the market to realize wireless transmission function.So should change
The serial interface module of existing embedded system and the circuit connecting relation of usb interface module, use an end
Mouth connects multiple different types of peripheral hardwares and realizes the data exchange of system and external equipment, simplified system interface mould
The configuration of block.
Summary of the invention
The problem existed for prior art, the present invention provide an a kind of USB port can connect multiple not
The serial transceiver interface module of congenerous peripheral hardware and usb interface module common port circuit and method of work.
The present invention solve above-mentioned technical problem be the technical scheme is that a kind of serial transceiver interface module with
Usb interface module common port circuit, including single-chip microcomputer and the USB port shared, single-chip microcomputer includes: with
The serial transceiver interface module of USB port connection and usb interface module；With described serial transceiver interface module
The interface screen unit blocking interface module communication is connected respectively with usb interface module；With described interface screen
Cover unit and main control unit connects the external apparatus interface module type accessing common port with detection, and will inspection
Measurement information is sent to the detector unit of described main control unit；It is connected with described interface screen unit and detector unit
The main control unit of interface screen unit is controlled with the detection information sent according to detector unit.
Described serial transceiver interface module line includes data transmission line and data receiver line, described data transmission line
Being connected with USB port pin D-, described data receiver line is connected with USB port pin D+；Described USB
Interface module line includes data line D-and data line D+；The data line of usb interface module
D-is connected with USB port pin D-, and data line D+ is connected with USB port pin D+.
Further, described serial transceiver interface module is UART interface module；UART interface module
Data receiver line is connected with USB port pin D+, the data transmission line of UART interface module and USB port
Pin D-connects.
Further, described serial transceiver interface module also includes SPI interface module；Described UART interface
The data receiver line of module, the data receiver line of SPI interface module are connected with USB port pin D+, described
The data transmission line of UART interface module, data transmission line and the USB port pin D-of SPI interface module
Connect.
Further, described serial transceiver interface module also includes usb interface module；Described UART interface
The data receiver line of module, the data receiver line of SPI interface module, data line D+ draw with USB port
Foot D+ connect, the data transmission line of described UART interface module, the data transmission line of SPI interface module,
The data line D-of usb interface module is connected with USB port pin D-.
Further, described serial transceiver interface module is SPI interface module, the data of SPI interface module
Receive line to be connected with electric interfaces module D+ of USB port, the data transmission line of SPI interface module and USB
Electric interfaces module D-of port connects.
Further, described serial transceiver interface module is usb interface module, two usb interface modules
Data line D-is connected with USB port pin D-, and data line D+ is connected with USB port pin D+.
Further, described circuit also includes the electricity of power circuit, described power circuit and USB port pin
Source foot connects, and described USB port pin also includes the return foot of ground connection.
Further, data receiver line and the data transmission line of described serial transceiver interface module connects through resistance
Ground.
The present invention also provides for the method for work of a kind of common port circuit, comprises the following steps:
S1: main control unit controls interface shielding units alternately shielding serial transceiver interface module and USB interface mould
Block；
S2: detector unit is accessed outside common port by the interface module detection not shielded in step S1
Portion's device interface module type, and detection information is sent to described main control unit；
S3: if external apparatus interface module type is usb interface module, it is single that main control unit controls interface shielding
Unit's shielding serial transceiver interface module, uses usb protocol to exchange data with external equipment；
If external apparatus interface module type is serial transceiver interface module, it is single that main control unit controls interface shielding
Unit's shielding usb interface module, uses serial transceiver interface module protocol to exchange data with external equipment.
In the present invention, the serial transceiver interface module of single-chip microcomputer is by shared USB port and peripheral hardware connecting communication,
A port can be realized be connected with the peripheral hardware of difference in functionality.Embedded system is multiple diverse without arranging
Interface module meets the needs connecting peripheral hardware, and serial transceiver interface module can realize one by common circuit
The connection of individual port, simplifies installation and the configuration of embedded system.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the circuit block diagram of serial transceiver interface module and usb interface module common port；
Fig. 2 is single-chip microcomputer and port device communication flow figure；
Fig. 3 is the circuit diagram of usb interface module and UART interface module common port；
Fig. 4 is the circuit diagram of usb interface module and SPI interface module common port；
Fig. 5 is usb interface module and SPI interface module, the circuit diagram of UART interface module common port；
Fig. 6 is the circuit diagram of multiple usb interface module common port；
Fig. 7 is multiple usb interface module and SPI interface module, the electricity of UART interface module common port
Lu Tu.
Detailed description of the invention
Below, referring to the drawings serial transceiver interface module and usb interface module common port to the present invention
Circuit is described in detail.
As it is shown in figure 1, serial transceiver interface module is connected with usb interface module and a common port, and
Connecting with interface screen unit respectively, interface screen unit connects main control unit and detector unit.
As in figure 2 it is shown, main control unit control interface screen unit constantly alternately shielding usb interface module and
Serial transceiver module, detector unit is detected and common port by the unscreened interface module of interface screen unit
The interface module type of the external equipment connected.
When by usb interface module, detector unit detects that peripheral hardware uses usb protocol communication, detector unit will
The interface module type information of the external equipment detected is sent to main control unit, and main control unit shielding serial is received
Sending out interface module, use usb protocol exchanges data with external equipment, until port for peripheral equipment is held with sharing
Mouth disconnects.
When by serial transceiver interface module, detector unit detects that peripheral hardware uses serial transceiver interface module to assist
View communication, the interface module type information of the external equipment detected is sent to main control unit by detector unit,
Main control unit shielding usb interface module, uses serial transceiver interface module protocol to exchange number with external equipment
According to, until port for peripheral equipment disconnects with common port.
As it is shown on figure 3, the serial transceiver interface module sharing USB port includes usb interface module and UART
Interface module.The running voltage of usb interface module is 5V, and usb interface module line is four lines, i.e. VCC,
D+, D-and GND.USB port is used for grafting external equipment, and in this circuit connects, USB has master-slave equipment
Point.Main equipment i.e. USB HOST end is the usb interface module of single-chip microcomputer, and usb signal is differential signal,
Holding wire is D+, D-, and at USB HOST end, D+ and D-respectively connects a pull down resistor, with USB port
D+, D-connect, when USB device insert USB port time, host scm detects insertion device signal,
Judge have equipment to access and the type of this equipment, and start to communicate with this equipment.
The running voltage of UART interface module is 5V, UART interface module line include RXD data receiver line and
TXD data transmission line.RXD data receiver line, USB HOST end D+ interface module line all with USB end
The D+ of mouth connects.TXD data transmission line, USB HOST end D-interface module line all with USB port
D-connects.
During operation, constantly switching usb interface module accesses altogether single-chip microcomputer with the detection of UART interface module
By the peripheral hardware type of port.During detection, when peripheral hardware uses one of which protocol interface module, system
Shield another interface module, use peripheral hardware communications protocol to carry out data transmission, eliminate its impact that may bring
Or conflict that may be present.
Such as, use USB flash disk to insert port, by usb interface module, single-chip microcomputer detects that peripheral hardware uses USB
Protocol, then shielding UART interface module, use usb protocol to exchange data with peripheral hardware, until USB flash disk
It is pulled out.After USB flash disk is extracted, single-chip microcomputer keeps and switches usb interface module and the inspection of UART interface module
Survey the peripheral hardware type accessing shared interface module.
When using UART interface module bluetooth module, when inserting USB port, single-chip microcomputer detects that peripheral hardware makes
Use UART protocol communication, then shield usb interface module, use UART protocol and peripheral hardware to exchange data, directly
It is pulled out to bluetooth module.After bluetooth module is extracted, single-chip microcomputer keep switching usb interface module with
The detection of UART interface module accesses the peripheral hardware type of common port.
As shown in Figure 4, the serial transceiver interface module of common port includes usb interface module and SPI interface
Module, common port is USB port.Usb interface module is 5V with the running voltage of SPI interface module,
Spi bus is made up of four signal line: serial time clock line SCLK, serial data send line SDO, serial number
Line SS is selected with Low level effective from machine according to receiving line SDI.Serial data receiving line SDI, USB HOST end
D+ interface module line be all connected with the D+ of USB port.Serial data sends line SDO, USB HOST end
D-interface module line be all connected with the D-of USB port.
During operation, constantly switching usb interface module accesses with the detection of SPI interface module and shares single-chip microcomputer
The peripheral hardware type of port.During detection, when peripheral hardware uses one of which protocol interface module, system screen
Cover another interface module, eliminate its impact that may bring or conflict that may be present.
Such as, use USB flash disk to insert port, by usb interface module, single-chip microcomputer detects that peripheral hardware uses USB
Protocol, then shielding SPI interface module, use usb protocol to exchange data with peripheral hardware, until USB flash disk quilt
Extract.After USB flash disk is extracted, keep switching usb interface module and SPI interface module of single-chip microcomputer detects and connects
Enter the peripheral hardware type of shared interface module.
When using SPI interface module to insert USB port, single-chip microcomputer detects that peripheral hardware uses SPI protocol to lead to
News, then shield usb interface module, uses SPI protocol to exchange data with peripheral hardware, until SPI interface module
It is pulled out.After SPI interface module is extracted, single-chip microcomputer keeps and switches usb interface module and SPI interface
Module detection accesses the peripheral hardware type of common port.
As it is shown in figure 5, the serial transceiver interface module of common port includes usb interface module, SPI interface
Module and UART interface module.The running voltage of three is identical, is 5V.UART interface module RXD
Data receiver line and the D+ interface module of SPI interface module Serial data receiving line SDI, USB HOST end
Line is all connected with the D+ of USB port.UART interface module TXD data transmission line and SPI interface module string
Row data transmission line SDO, the D-interface module line of USB HOST end are all connected with the D-of USB port.
Single-chip microcomputer during operation, constantly switches usb interface module, SPI interface module and UART interface
Module detection accesses the peripheral hardware type of common port.During detection, when peripheral hardware uses one of which agreement to connect
During mouth die block, two other interface module of system mask, eliminate its impact that may bring or that may be present
Conflict.
As shown in Figure 6, the serial transceiver interface module of common port is usb interface module, each USB
The D+ interface module line of interface module is all connected with the D+ of USB port, D-interface module line and USB port
D-connect.Two usb interface modules share a USB port.
As it is shown in fig. 7, the serial transceiver interface module of common port includes usb interface module, SPI interface
Module and UART interface module, each two groups of every kind of interface module.The running voltage of six is identical, is 5V.
The RXD data receiver line of two UART interface modules, the serial data in line of two SPI interface modules
SDI, the D+ interface module line of two USB HOST ends are all connected with the D+ of USB port.Two UART
The TXD data transmission line of interface module, the serial data out line SDO of two SPI interface modules, two
The D-interface module line of USB HOST end is all connected with the D-of USB port.
Single-chip microcomputer during operation, constantly switches usb interface module, SPI interface module and UART interface
Module detection accesses the peripheral hardware type of common port.During detection, when peripheral hardware uses one of which agreement to connect
During mouth die block, other interface module of system mask, eliminate its impact that may bring or conflict that may be present.
In the present invention, the serial transceiver interface module of single-chip microcomputer is by shared USB port and peripheral hardware connecting communication,
A port can be realized be connected with the peripheral hardware of difference in functionality.Embedded system is multiple diverse without arranging
Interface module meets the needs connecting peripheral hardware, and serial transceiver interface module can realize one by common circuit
The connection of individual port, simplifies installation and the configuration of embedded system.
It should be understood that above example only have expressed the preferred embodiment of the present invention, its description more has
Body is with detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention；It should be pointed out that,
For the person of ordinary skill of the art, without departing from the inventive concept of the premise, can be to above-mentioned
Technical characterstic carries out independent assortment, it is also possible to make some deformation and improvement, and these broadly fall into the guarantor of the present invention
Protect scope；Therefore, all equivalents done with scope of the invention as claimed and modification, all should be belonged to this
The covering scope of invention claim.
Claims (10)
1. serial transceiver interface module and a usb interface module common port circuit, including single-chip microcomputer with
USB port, it is characterised in that described single-chip microcomputer includes:
The serial transceiver interface module being connected with described USB port and usb interface module；
It is connected respectively to block interface module communication with described serial transceiver interface module and usb interface module
Interface screen unit；
It is connected with described interface screen unit and main control unit and connects with the external equipment of detection access common port
Mouth die block type, and detection information is sent to the detector unit of described main control unit；
The detection information control to send it is connected according to detector unit with described interface screen unit and detector unit
The main control unit of interface screen unit processed.
Common port circuit the most according to claim 1, it is characterised in that described serial transmitting-receiving connects
Mouth die block line includes data transmission line and data receiver line, described data transmission line and USB port pin D-
Connecting, described data receiver line is connected with USB port pin D+；
Described usb interface module line includes data line D-and data line D+；Usb interface module
Data line D-be connected with USB port pin D-, data line D+ and USB port pin D+
Connect.
Common port circuit the most according to claim 2, it is characterised in that described serial transmitting-receiving connects
Mouth die block is UART interface module；The data receiver line of UART interface module is with USB port pin D+ even
Connecing, the data transmission line of UART interface module is connected with USB port pin D-.
Common port circuit the most according to claim 3, it is characterised in that described serial transmitting-receiving connects
Mouth die block also includes SPI interface module；The data receiver line of described UART interface module, SPI interface mould
The data receiver line of block is connected with USB port pin D+, the data transmission line of described UART interface module,
The data transmission line of SPI interface module is connected with USB port pin D-.
Common port circuit the most according to claim 4, it is characterised in that described serial transmitting-receiving connects
Mouth die block also includes usb interface module；The data receiver line of described UART interface module, SPI interface mould
The data receiver line of block, data line D+ are connected with USB port pin D+, described UART interface module
Data transmission line, the data transmission line of SPI interface module, usb interface module data line D-with
USB port pin D-connects.
Common port circuit the most according to claim 2, it is characterised in that described serial transmitting-receiving connects
Mouth die block is SPI interface module, the data receiver line of SPI interface module and the electric interfaces mould of USB port
Block D+ connects, and the data transmission line of SPI interface module is connected with electric interfaces module D-of USB port.
Common port circuit the most according to claim 2, it is characterised in that described serial transmitting-receiving connects
Mouth die block is usb interface module, the data line D-of two usb interface modules and USB port pin
D-connects, and data line D+ is connected with USB port pin D+.
Common port circuit the most according to claims 1 to 7, it is characterised in that described circuit also wraps
Including power circuit, described power circuit is connected with the supply pin of USB port pin, described USB port pin
Also include the return foot of ground connection.
Common port circuit the most according to claim 8, it is characterised in that described serial transmitting-receiving connects
The data receiver line of mouth die block and data transmission line are through resistance eutral grounding.
10. a method of work for the common port circuit as described in any one of the claims 1～9,
It is characterized in that, comprise the following steps:
S1: main control unit controls interface shielding units alternately shielding serial transceiver interface module and USB interface mould
Block；
S2: detector unit is accessed outside common port by the interface module detection not shielded in step S1
Portion's device interface module type, and detection information is sent to described main control unit；
S3: if external apparatus interface module type is usb interface module, it is single that main control unit controls interface shielding
Unit's shielding serial transceiver interface module, uses usb protocol to exchange data with external equipment；
If external apparatus interface module type is serial transceiver interface module, main control unit controls interface screen
Cover unit shielding usb interface module, use serial transceiver interface module protocol to exchange data with external equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610421845.7A CN105930293B (en) | 2016-06-15 | 2016-06-15 | Serial transceiver interface module and usb interface module common port circuit and working method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610421845.7A CN105930293B (en) | 2016-06-15 | 2016-06-15 | Serial transceiver interface module and usb interface module common port circuit and working method |
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| CN105930293B CN105930293B (en) | 2019-04-12 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105930293B (en) | 2019-04-12 |
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