CN109522258A - USB interface, electronic equipment, USB interface-based programming system and its method - Google Patents
USB interface, electronic equipment, USB interface-based programming system and its method Download PDFInfo
- Publication number
- CN109522258A CN109522258A CN201811212715.8A CN201811212715A CN109522258A CN 109522258 A CN109522258 A CN 109522258A CN 201811212715 A CN201811212715 A CN 201811212715A CN 109522258 A CN109522258 A CN 109522258A
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- pin
- usb interface
- electronic equipment
- differential signal
- processing unit
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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
-
- 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
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/61—Installation
- G06F8/63—Image based installation; Cloning; Build to order
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Computer Hardware Design (AREA)
- Information Transfer Systems (AREA)
Abstract
The invention discloses a kind of USB interface, ID pin is configured as data input function pin or data output function pin；Also disclose a kind of electronic equipment, including above-mentioned USB interface and central processing unit, USB is electrically connected to central processing unit, central processing unit is provided with the first communication ends and the second communication ends, first communication ends of the central processing unit are configured to be connected to the differential signal pin in the USB interface, second communication ends of central processing unit are configured to be connected to the ID pin in USB interface, and central processing unit establishes communication connection by ID pin and differential signal pin；A kind of USB interface-based programming system, including above-mentioned electronic equipment are also disclosed, an electronic equipment carries out burning to another electronic equipment by USB interface；Using the technical program, it is more favorable for the integrated of electronic equipment, the after-sales service of manufacturing enterprise is more convenient, and switching circuit is omitted, and improves equipment efficiency of research and development.
Description
Technical field
The invention belongs to electronic information field, it is more particularly related to USB interface, electronic equipment, be based on USB
The programming system and its method of interface.
Background technique
Electronic equipment develops towards Integration Design direction at present, while requiring external interface simplification, but USB is as charging
Interface can all retain, therefore only need USB interface to use charge function for ordinary consumer, and manufacturing enterprise also wants to
The section communication function of USB convenient for upgrade procedure after sale or debugs log, documents disclosed in the prior art
In CN206270936U, DAT+/- pin and ID pin in USB interface pass through the end SWIM that switching circuit is connected to MCU respectively
Mouth and the port NREST, so that switching signal input, output, USB interface use only VBUS, GND two letters in charge function
Number foot, the feeder ear of VBUS signal pins and power supply, and GND pin is grounded；Due to needing to use switching circuit in the technical solution,
Therefore be unfavorable for the integrated of electronic equipment, the exploitation and use of extreme influence equipment, other technologies scheme mostly use greatly DAT+,
DAT- is shorted or divider resistance, but if DAT+, DAT- are directly shorted with the downloading foot of MCU, then can lead in use process
It causes central processing unit abnormal and can not work normally.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of USB interface, electronic equipment, USB interface-based burnings
System and method.
To achieve the goals above, the technical scheme adopted by the invention is as follows: a kind of USB interface, including differential signal pin,
ID pin, VBUS pin and GND pin, the ID pin is configured as data input function pin or data output function is drawn
Foot.
A kind of electronic equipment disclosed by the invention, including above-mentioned USB interface.
Electronic equipment disclosed by the invention, further includes central processing unit, and USB is electrically connected to central processing unit, central processing
Device is provided with the first communication ends and the second communication ends, and the first communication ends of the central processing unit are configured to be connected to described
Differential signal pin in USB interface, the ID that the second communication ends of central processing unit are configured to be connected in USB interface draw
Foot, central processing unit establish communication connection by ID pin and differential signal pin.
Electronic equipment disclosed by the invention, the differential signal pin include that data positive signal pin and data negative signal draw
Foot, the first communication ends of the central processing unit are configured to be connected to data positive signal pin or data minus signal pins.
Electronic equipment disclosed by the invention, the USB interface turn-off data positive signal pin and draws data negative signal
First communication ends of foot access central processing unit；
Alternatively, USB interface turn-off data negative signal pin, and data positive signal pin is accessed the first of central processing unit
Communication ends.
A kind of downloading wire disclosed by the invention, the both ends port of the downloading wire are to draw including differential signal pin, ID
The port of foot, VBUS pin and GND pin.
Programming system disclosed by the invention, one of electronic equipment carry out another electronic equipment by USB interface
Burning.
USB interface-based programming system disclosed by the invention, further includes downloading wire, and the USB of an electronic equipment connects
Mouth is connected between external another electronic equipment by downloading wire, which is provided with defeated with the interface that USB is connected to each other
Enter downloading end and output downloading end, the output downloading end is configured to be connected to ID pin or difference in the USB interface
One of sub-signal pin, input downloading end are connected to one of differential signal pin in USB interface or ID pin.
A kind of USB interface-based method for burn-recording disclosed by the invention, the electronic equipment pass through the difference in USB interface
Signal pins or the output of ID pin receive download signal in another electronic equipment；
And data are uploaded by the downloading of one of described differential signal pin by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin；
Alternatively,
One electronic equipment is connect by the downloading wire with another electronic equipment, and data are drawn by the differential signal
The downloading of one of foot, is uploaded by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin.
A kind of USB interface-based method for burn-recording disclosed by the invention, when the differential signal pin and the ID pin
When carrying out data transmission, another differential signal pin work can be identical or spare as the ID pin；
The work of another differential signal pin can be enabled and be stopped by equipment start-stop signal.
Using the technical program, by differential signal pin (i.e. the data positive signal pin and data negative signal in USB interface
Pin) output pin as central processing unit (MCU), and idle ID pin makes as the input pin of central processing unit
With developer not only may be implemented and carry out information downloading to it, and draw due to not influencing VBUS by this connection type
Foot and GND pin are connected with voltage source, and the charge function to USB interface for remaining user uses, and avoid central processing unit
Due to the adverse effect that the short circuit of USB differential signal pin generates, even if divider resistance is used in USB interface, due to utilizing
Differential signal pin cooperates the use of ID pin as one of input or the pin of output, can be to avoid centering central processor
Operation irregularity, therefore communication means used by this case is more favorable for the integrated of electronic equipment, the after-sales service of manufacturing enterprise
It is more convenient, switching circuit at USB interface described in open documents is omitted, so that USB interface there are more designs
Equipment efficiency of research and development is improved in space.
Below with reference to drawings and examples, the present invention is described in detail.
Detailed description of the invention
Content expressed by each width attached drawing of this specification and the label in figure are briefly described below:
Fig. 1 is a kind of schematic diagram of USB interface of the present invention；
Fig. 2 is the schematic diagram of downloading wire in present system.
Specific embodiment
Below against attached drawing, by the description of the embodiment, to for example related each structure of a specific embodiment of the invention
The shape of part, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle, manufacturing process
And operate with method etc., be described in further detail, with help those skilled in the art to inventive concept of the invention,
Technical solution has more complete, accurate and deep understanding.
Embodiment one
Fig. 1 is a kind of schematic diagram of USB interface of the present invention, a kind of USB interface as shown in Figure 1, a kind of USB interface, packet
Include differential signal pin, ID pin, VBUS pin and GND pin, the ID pin be configured as data input function pin or
Person's data output function pin further includes central processing unit in the electronic equipment including the USB interface, and USB is electrically connected to center
Processor, central processing unit are provided with the first communication ends and the second communication ends, and the first communication ends of the central processing unit are matched
It is set to the differential signal pin being connected in the USB interface, the second communication ends of central processing unit are configured to be connected to USB
ID pin in interface, central processing unit establish communication connection by ID pin and differential signal pin, include being used in pin
The differential signal pin of input differential signal, and idle ID pin, USB are electrically connected to central processing unit, central processing unit
The first communication ends and the second communication ends are provided with, the output signal end of the central processing unit is configured to be connected to the USB
Differential signal pin in interface, to export the download information in central processing unit, the input signal end of central processing unit is configured
At the ID pin being connected in USB interface, central processing unit receives upload information by ID pin, and differential signal pin includes number
According to positive signal pin and data negative signal pin, the output end of the central processing unit is configured to be connected to data positive signal and draws
Foot or data minus signal pins.
USB interface turn-off data positive signal pin and the first communication that data minus signal pins are accessed to central processing unit
End；
Alternatively, USB interface turn-off data negative signal pin, and data positive signal pin is accessed the first of central processing unit
Communication ends, second communication ends of the central processing unit for downloading are connected to the data positive signal of USB interface or data negative signal draws
Foot (i.e. DAT+ pin and DAT- pin), and the upload input terminal of central processing unit is connected to ID pin, so that it may it realizes
The downloading wire of developer's customization can be downloaded, and ordinary consumer either still has point with the line that DAT+ and DAT- is shorted
The line of pressure will not all have an impact MCU.If it is short circuit, do not had due to only having used in DAT+, DAT- first, being shorted
It influences.
Pin in USB refers to the wiring from integrated circuit (chip) internal circuit extraction and peripheral circuit, and pin is constituted
The interface of this block chip, the cut-in method of pin is the anode that VBUS accesses power supply, GND pin access electricity in majority of case
The cathode in source, differential signal pin are used for transmission the communication port of data access central processing unit, the height electricity of differential signal pin
Gentle low level can mutually switch the input terminal and output end of access central processing unit, and big multi-configuration ID draws in USB interface
Foot, the effect of ID pin are the level height for detecting external equipment access state, save power consumption, expand range, detect ID feet
State height, to be judged as main equipment or be from the principle that equipment .OTG is detected: USB otg standard is marked in completely compatible USB2.0
On the basis of standard, power management function is added, it allows equipment to can not only be used for host, also can be used as peripheral hardware operation；Therefore USB
Data transmission when OTG technology can realize no host between equipment and equipment.Such as: digital camera can directly and printer
Simultaneously photograph print is connected, data etc. can be directly transmitted between mobile phone and mobile phone, so that the application range of USB technology has been expanded,
In OTG, Initial master equipment is known as A equipment, and peripheral hardware is known as B device.
Embodiment two
Fig. 2 is the schematic diagram of downloading wire in present system, and the burning process of the electronic system in this case is an electronics
Equipment carries out burning to the electronic equipment that another includes the USB interface by USB interface described in this case, in system
It is connected between USB interface and external downloading equipment by downloading wire, which is provided with defeated with the interface that USB is connected to each other
Enter downloading end and output downloading end, the output downloading end is configured to be connected to the ID pin in the USB interface, under input
It carries end and is connected to the differential signal pin (i.e. data positive signal pin or data minus signal pins) in USB interface, downloading wire
To include the system equipment USB interface be the corresponding docking USB interface being arranged, another end interface of downloading wire be include ID
Pin, differential signal pin, GND pin and VBUS pin communication serial port, the communication port be external equipment port, cooperation should
Downloading wire can be communicated to connect using the equipment of system described in this case with external other equipment.
A kind of USB interface-based method for burn-recording disclosed in this case, the essence of USB interface are serial communication protocol, serial ports
Communication is that byte is sent and received by displacement, and typically, serial ports is transmitted for ASCII character, since serial communication is asynchronous
, port can send data on single line while receive data on another single line, therefore USB points are drawn for differential signal
Foot transmits commonly used in data, and the equipment in this case including the system passes through the differential signal pin output in USB interface
Download signal is in external equipment.
Electronic equipment is by the differential signal pin or the output of ID pin in USB interface or receives download signal in another
Electronic equipment；
And data are uploaded by the downloading of one of described differential signal pin by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin；
Alternatively,
One electronic equipment is connect by the downloading wire with another electronic equipment, and data are drawn by the differential signal
The downloading of one of foot, is uploaded by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin.
System is communicatively coupled to other equipment by the downloading wire that this case provides, and the upload between facility information may be implemented
And downloading, and the function that above-mentioned developer carries out information modification to it is remained, if using other downloading wires in this
The equipment of system then only retains charge function, information mutual communication is blocked, so that the operating system and program in equipment are only manager
It can change, the program and function being arranged to is used only in user, in order to safeguard to system.
Embodiment three
Equipment including this case system is under charged state, and the equipment including the system is under charged state, is
VBUS pin and GND pin in USB interface in system are connected with voltage source by common downloading wire, are filled to the equipment
Electricity；
Alternatively, in the state that external equipment charges to it by the system equipment, the USB in the system
The differential signal pin of interface exports electric energy in external equipment by the downloading wire.
USB is that (mainly work is stablized in regulated power supply, offer by a stabilized power supply in fact as the charging process of interface
Make voltage and enough electric currents) plus necessary constant current, pressure limiting, in limited time etc. control circuits constitute.Original-pack charger (referring to line charge)
On the output parameter that is marked: the correlation that such as output 4.4V/1A, output 5.9V/400mA ... just refer to interior voltage-stabilized power supply
Parameter, therefore phone charger is easy to be changed to a superior in quality regulated power supply, for example output 4.4V can be to 4.5V's
Equipment use and the equipment that can give 6V of 5.9V are used.
Mobile phone often uses the charger of lithium ion battery using onstant current voltage limiting to charge system, and charging current generally uses C2 left
It is right — that is, use two hours charge rates, for example 500mah battery reaches after 4.2V constant pressure again using 250ma charging about two hours
Charging.
Since the use process of equipment is only charge function mostly, majority of case is external without the concern for equipment
Discharge process can charge to this equipment only with common downloading wire, if special circumstances are needed through equipment to external
When equipment charge, then just can must externally be charged using the downloading wire that this case provides, then this function only retains
To the developer or manager of the line for using the downloading, then still can be improper to avoid equipment use process, caused by
Central processing unit abnormality, using and managing convenient for equipment.
Example IV
Electronic equipment in this case by above-mentioned connection type, differential signal pin in USB interface one of them
Pin is not engaged in the connection of communication output and input, the differential signal pin in electronic equipment and the ID pin into
When row data are transmitted, another differential signal pin work can be identical or spare as the ID pin；Another differential signal pin
Work can be enabled and be stopped by equipment start-stop signal.The pin being not used can be used as detection pin, because this
When system in case is used for R&D process, between central processing unit and USB interface and configuration relation is formd, therefore either
The communication ends of D+ in differential pin or D- access MCU, can all have a pin is not for communicating, therefore by the pin
The reset pin being connected in MCU can carry out reset operation by this USB to MCU, can pass through external equipment in system
Start this reset signal, can also be powered on be installed with by triode and be set to switching circuit reset control is carried out to it.
USB interface in this example is communicating the connection method used with above-mentioned connection type, for the high electricity of differential pin choosing
The communication ends of flat or low level connection MCU and the ID pin in USB are configured to be connected to another communication ends of MCU, under formation
Two communication lines for carrying and uploading, another pin for being not introduced into central processing unit are the high level pin or low of differential signal
Level pin (i.e. D+ and D-).
If the pin for being not introduced into central processing unit is high level pin, which can be connected to central processing unit
The signal pins of middle high level triggering, such as control pin (PSEN) this kind, connection so has not only ensured above content
Communication function, and the corresponding specific function triggered of the respective pins in MCU is triggered by USB interface.
If the pin for being not introduced into central processing unit is low level pin, which can be connected to central processing unit
The signal pins of middle low level triggering, such as reset pin (RST) are this kind of, and reset pin (RST) can pass through the two of one-way conduction
The collector of triode can be accessed resistance R due to the filter effect of RC circuit by pole pipe or the triode for accessing RC circuit
The basis set of (resistance value of R is at 2 kilo-ohms to 3 kilo-ohms), triode accesses capacitor C (less than 0.1 μ F), and the emitter ground connection of triode is
Can, it can use the one-way conduction of diode or triode in this way, pass through USB for low level signal as instantaneous trigger signal
Interface access reset pin (RST) in so that the USB interface has reset function so that electronic product interface is more brief,
Improve efficiency of research and development.
Using the technical program, by differential signal pin (i.e. the data positive signal pin and data negative signal in USB interface
Pin) output pin as central processing unit (MCU), and idle ID pin makes as the input pin of central processing unit
With developer not only may be implemented and carry out information downloading to it, and draw due to not influencing VBUS by this connection type
Foot and GND pin are connected with voltage source, and the charge function to USB interface for remaining user uses, and avoid central processing unit
Due to the adverse effect that the short circuit of USB differential signal pin generates, even if divider resistance is used in USB interface, due to utilizing
Differential signal pin cooperates the use of ID pin as one of input or the pin of output, can be to avoid centering central processor
Operation irregularity, therefore communication means used by this case is more favorable for the integrated of electronic equipment, the after-sales service of manufacturing enterprise
It is more convenient, switching circuit at USB interface described in open documents is omitted, so that USB interface there are more designs
Equipment efficiency of research and development is improved in space.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing
It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.
Claims (10)
1. a kind of USB interface, including differential signal pin, ID pin, VBUS pin and GND pin, which is characterized in that the ID
Pin is configured as data input function pin or data output function pin.
2. a kind of electronic equipment, which is characterized in that including USB interface described in claim 1.
3. electronic equipment according to claim 1, which is characterized in that further include central processing unit, USB is electrically connected to center
Processor, central processing unit are provided with the first communication ends and the second communication ends, and the first communication ends of the central processing unit are matched
It is set to the differential signal pin being connected in the USB interface, the second communication ends of central processing unit are configured to be connected to USB
ID pin in interface, central processing unit establish communication connection by ID pin and differential signal pin.
4. electronic equipment according to claim 2, which is characterized in that the differential signal pin includes that data positive signal is drawn
Foot and data negative signal pin, the first communication ends of the central processing unit are configured to be connected to data positive signal pin or number
According to negative signal pin.
5. electronic equipment according to claim 2, which is characterized in that the USB interface turn-off data positive signal pin is simultaneously
And data minus signal pins are accessed to the first communication ends of central processing unit；
Alternatively, USB interface turn-off data negative signal pin, and the first of data positive signal pin access central processing unit is communicated
End.
6. a kind of downloading wire, including a kind of USB interface described in claim 1, which is characterized in that the both ends end of the downloading wire
Mouth is port described in claim 1.
7. a kind of USB interface-based programming system, which is characterized in that including described at least two claim any one of 2-6
Electronic equipment, one of electronic equipment by USB interface to another electronic equipment carry out burning.
8. USB interface-based programming system according to claim 7, which is characterized in that it further include downloading wire, described one
It is connected between the USB interface of electronic equipment and external another electronic equipment by downloading wire, what which was connected to each other with USB
Interface is provided with input downloading end and output downloading end, and the output downloading end is configured to be connected in the USB interface
ID pin or one of differential signal pin, input downloading end is connected to one of differential signal pin in USB interface or ID
Pin.
9. a kind of USB interface-based method for burn-recording, including USB interface-based programming system described in claim 7 or 8,
It is characterized in that,
The electronic equipment is by the differential signal pin or the output of ID pin in USB interface or receives download signal in another
Electronic equipment；
And data are uploaded by the downloading of one of described differential signal pin by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin；
Alternatively,
One electronic equipment is connect by the downloading wire with another electronic equipment, data pass through the differential signal pin it
One downloading, is uploaded by the ID pin；
Or, data are uploaded by one of described differential signal pin, downloaded by the ID pin.
10. a kind of USB interface-based method for burn-recording according to claim 9, which is characterized in that when the differential signal
When carrying out data transmission, another differential signal pin work can be identical or standby as the ID pin for pin and the ID pin
With；
The work of another differential signal pin can be enabled and be stopped by equipment start-stop signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212715.8A CN109522258A (en) | 2018-10-18 | 2018-10-18 | USB interface, electronic equipment, USB interface-based programming system and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212715.8A CN109522258A (en) | 2018-10-18 | 2018-10-18 | USB interface, electronic equipment, USB interface-based programming system and its method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109522258A true CN109522258A (en) | 2019-03-26 |
Family
ID=65772646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811212715.8A Withdrawn CN109522258A (en) | 2018-10-18 | 2018-10-18 | USB interface, electronic equipment, USB interface-based programming system and its method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109522258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113590143A (en) * | 2021-08-03 | 2021-11-02 | 北京宇系航通科技有限公司 | MCU program downloading method based on USB, electronic equipment and storage medium |
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| CN102023955A (en) * | 2009-09-14 | 2011-04-20 | 珠海全志科技有限公司 | Method for connecting USB controller and USB controller |
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Application publication date: 20190326 |
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