CN209417727U - Interface conversion equipment - Google Patents
Interface conversion equipment Download PDFInfo
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- CN209417727U CN209417727U CN201920519869.5U CN201920519869U CN209417727U CN 209417727 U CN209417727 U CN 209417727U CN 201920519869 U CN201920519869 U CN 201920519869U CN 209417727 U CN209417727 U CN 209417727U
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Abstract
The utility model provides a kind of interface conversion equipment, comprising: USB turns serial paralled interface chip and receives the usb signal that host computer is sent, and usb signal is converted to rs 232 serial interface signal and/or parallel port signal, and then rs 232 serial interface signal and/or parallel port signal are sent to receiver board；Receiver board replicates rs 232 serial interface signal and/or parallel port signal, rs 232 serial interface signal and/or parallel port signal that duplication obtains is exported by extending pio chip to the access interface of multiple controlled plants, to control multiple controlled plants.One end of the interface conversion equipment can be connect with host computer by data line, the other end can be connect with multiple controlled plants, pass through the conversion process of interface conversion equipment internal signal, the purpose that host computer controls multiple controlled plants may be implemented, the communication mode directly connected by data line is easy to operate, time saving and energy saving.
Description
Technical field
The utility model relates to the technical fields of interface conversion, more particularly, to a kind of interface conversion equipment.
Background technique
It needs to use physiology in the experiment of multi-modal data synchronous acquisition and leads instrument, electroencephalograph, near-infrared spectroscopy instrument more
Equal experimental facilities, these experimental facilities mainly pass through DP25 needle interface or DP9 needle interface is connect with host computer.When experiment, electricity
Brain server running experiment program is sent to experimental facilities by DP25 needle interface or DP9 needle interface and is instructed, and experimental facilities receives simultaneously
The instruction of parsing host computer transmission simultaneously makes corresponding movement.
Currently, most of host computers, factory, which is all defaulted, does not install DP25 needle interface or DP9 needle interface, therefore, Yong Huxu
Voluntarily to buy corresponding adapter (for being converted to interface type, for example, switching be above-mentioned DP25 needle interface or
DP9 needle interface), and host computer is dismantled, the adapter of purchase is installed to computer main board, to realize the company with experimental facilities
It connects, and then realizes the function of sending instruction to experimental facilities.But since the corresponding device id of different adapters is different,
When writing experimental arrangement by host computer, need to send the port ID number and the switching of installation of instruction in checking experiment program
Whether card ID number is consistent, and whole operation is relatively complicated and error-prone.
To sum up, existing by installing adapter in host computer, to realize that host computer is communicated with experimental facilities
Mode, it is cumbersome, it is time-consuming.
Utility model content
The purpose of this utility model is to provide a kind of interface conversion equipments, to alleviate conventional solution due in computer
Cumbersome caused by adapter, the technical issues of time-consuming, is installed on host.
A kind of interface conversion equipment provided by the utility model, comprising: it is defeated that USB turns serial paralled interface chip, receiver board and extension
Chip out；
Wherein, the input terminal that the USB turns serial paralled interface chip is connect by data line with host computer, and the USB turns string simultaneously
The output end of mouth chip is connect with the input terminal of the receiver board, the output end of the receiver board and the extension pio chip
Input terminal connection；
The USB turns the usb signal that serial paralled interface chip is sent for receiving the host computer, and the usb signal is turned
It is changed to rs 232 serial interface signal and/or parallel port signal, and then the rs 232 serial interface signal and/or the parallel port signal are sent to the reception
Plate；
The receiver board for receiving the rs 232 serial interface signal and/or the parallel port signal, and to the rs 232 serial interface signal and/or
The parallel port signal is replicated；
The extension pio chip will be for that will replicate the obtained rs 232 serial interface signal and/or parallel port signal output at most
The access interface of a controlled plant, to control multiple controlled plants.
Further, further includes: wireless transmitter；
The wireless transmitter is plugged on the USB interface of the host computer, the USB letter for sending the host computer
Number radio frequency signal is converted to, and the radio frequency signal is sent to the receiver board.
Further, the wireless transmitter includes: that USB turns parallel port chip, expelling plate and wireless transmission chip；
The input terminal that the USB turns parallel port chip is connect with the USB interface of the host computer, and the USB turns parallel port chip
Output end connect with the input terminal of the expelling plate, the output end of the expelling plate is connect with the wireless transmission chip；
The USB turns parallel port chip for the usb signal that the host computer is sent to be converted to parallel port signal, and will be described
Parallel port signal is sent to the expelling plate；
The expelling plate is used to receive the parallel port signal that the USB turns the transmission of parallel port chip, and to described and message
It number is encoded, obtains radio frequency signal；
The wireless transmission chip is used to the radio frequency signal being sent to the receiver board.
Further, further includes: wireless receiving chip；
The output end of the wireless receiving chip is connect with the receiver board, is sent for receiving the wireless transmission chip
The radio frequency signal, and the radio frequency signal is sent to the receiver board；
The receiver board is also used to receive the radio frequency signal, and replicates to the radio frequency signal, will
The radio frequency signal that duplication obtains, which is exported by the extension pio chip to the access of multiple controlled plants, to be connect
Mouthful, to control multiple controlled plants.
Further, further includes: MAX232 chip；
The input terminal of the MAX232 chip is connect with the USB interface of the host computer, the output of the MAX232 chip
End is connect with the receiver board.
Further, it includes: that USB turns serial port chip and USB turns parallel port chip that the USB, which turns serial paralled interface chip,；
Wherein, it includes: CH340 chip that the USB, which turns serial port chip,.
Further, it includes: CY7C68013A chip that the USB, which turns parallel port chip,.
Further, the chip of the receiver board includes: STM32F103RCT6 chip.
Further, the chip of the expelling plate includes: STM32F030C8T6 chip.
Further, the extension pio chip includes: multiple MAX232 chips and/or 74HC04 chip.
In the utility model embodiment, which includes: that USB turns serial paralled interface chip, receiver board and extension
Pio chip, the input terminal that USB turns serial paralled interface chip are connect by data line with host computer, and USB turns the output of serial paralled interface chip
End is connect with the input terminal of receiver board, and the output end of receiver board is connect with the input terminal of extension pio chip.Wherein, USB turns string
Parallel port chip is used to receive the usb signal of host computer transmission, and usb signal is converted to rs 232 serial interface signal and/or parallel port signal, into
And rs 232 serial interface signal and/or parallel port signal are sent to receiver board；Receiver board is used to receive rs 232 serial interface signal and/or parallel port signal, and
Rs 232 serial interface signal and/or parallel port signal are replicated, extension pio chip will be for that will replicate obtained rs 232 serial interface signal and/or parallel port
Signal is exported to the access interface of multiple controlled plants, to control multiple controlled plants.Through the above description
It is found that one end of the interface conversion equipment can be connect with host computer by data line, the other end can be with multiple controlled plants
Connection, by the conversion process of interface conversion equipment internal signal, may be implemented host computer and controls multiple controlled plants
Purpose, this directly by data line connect communication mode it is easy to operate, it is time saving and energy saving, alleviate conventional solution due to
Cumbersome caused by adapter, the technical issues of time-consuming, is installed on host computer.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of interface conversion equipment provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of the interface conversion equipment under wireless communications mode provided by the embodiment of the utility model；
Fig. 3 is the structural schematic diagram of another interface conversion equipment provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of wireless transmitter provided by the embodiment of the utility model；
Fig. 5 is the concrete structure schematic diagram of interface conversion equipment provided by the embodiment of the utility model；
Fig. 6 is that expelling plate STM32F030C8T6 and USB provided by the embodiment of the utility model turns parallel port chip
The pin connection schematic diagram of CY7C68013A chip；
Fig. 7 is the functional schematic of each interface in 25 needle provided by the embodiment of the utility model parallel port；
Fig. 8 is the operation schematic diagram of CH340 provided by the embodiment of the utility model switching chip.
Icon: 11-USB turns serial paralled interface chip；12- receiver board；13- extends pio chip；14- wireless transmitter；15- without
Line receives chip；16-MAX232 chip；141-USB turns parallel port chip；142- expelling plate；143- wireless transmission chip.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with embodiment, it is clear that described
Embodiment be the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this reality
With novel protected range.
To be set to a kind of interface conversion disclosed in the utility model embodiment first convenient for understanding the present embodiment
It is standby to describe in detail.
A kind of interface conversion equipment, with reference to Fig. 1, comprising: USB turns serial paralled interface chip 11, receiver board 12 and extension output core
Piece 13；
Wherein, the input terminal that USB turns serial paralled interface chip 11 is connect by data line with host computer, and USB turns serial paralled interface chip
11 output end is connect with the input terminal of receiver board 12, and the output end of receiver board 12 and the input terminal of extension pio chip 13 connect
It connects；
USB turns serial paralled interface chip 11 and is converted to serial ports letter for receiving the usb signal of host computer transmission, and by usb signal
Number and/or parallel port signal, and then rs 232 serial interface signal and/or parallel port signal are sent to receiver board 12；
Receiver board 12 answers rs 232 serial interface signal and/or parallel port signal for receiving rs 232 serial interface signal and/or parallel port signal
System；
Extension pio chip 13 is used to export rs 232 serial interface signal and/or parallel port signal that duplication obtains to multiple controlled plants
Access interface, to control multiple controlled plants.
In the utility model embodiment, serial paralled interface chip 11, receiver board 12 and extension 13 groups of pio chip are turned by USB
At device can be referred to as receiver, which can be made as the interface conversion equipment in the utility model alone
With.
In use, the input terminal of the receiver can be presented in the form of USB interface, can will be received by USB data line
The USB interface on USB interface and host computer on device is attached；Meanwhile the output end of the receiver controlled is set with multiple
What the form of standby access interface was presented (may include that 9 needle serial port interfaces and 25 needle parallel ports connect in the utility model embodiment
Mouthful), it is also possible to which the output end of receiver and multiple controlled plants are attached by corresponding interface data wire.
When host computer is sent to multiple controlled plants to be instructed, which is specially usb signal, and usb signal is turned by USB
After serial paralled interface chip 11, rs 232 serial interface signal and/or parallel port signal are converted to, the rs 232 serial interface signal and/or parallel port signal reach receiver board
After 12, receiver board 12 replicates the rs 232 serial interface signal and/or parallel port signal, finally replicates obtained rs 232 serial interface signal and/or simultaneously
Message number controlled is set to multiple by the access interface of extension pio chip 13 output to multiple controlled plants to realize simultaneously
The standby purpose controlled.
It should be noted that turn serial paralled interface chip 11 when converting to the usb signal that host computer is sent in USB, it can
With converted according to control (for example, to the needs that there is the controlled plant of 9 needle serial port interfaces to be controlled, to having
What the controlled plant of 25 needle parallel port interfaces was controlled needs), rs 232 serial interface signal can be only converted to, can also be only converted to simultaneously
Message number, it is, of course, also possible to be converted to rs 232 serial interface signal and parallel port signal simultaneously.
In addition, the prior art is installed on host computer in the mode of adapter, it is also necessary to send and refer in inspection control program
Whether the port id of order and the adapter ID number of installation are consistent, which easily malfunctions, and the utility model passes through USB data line
Interface conversion equipment and host computer are established in the mode of connection, check and control processing procedure sequence (refers to host computer to controlled plant without examining again
The program controlled) in send instruction port id, process is simple, while can also be to avoid error.
In addition, the prior art is installed on host computer in the mode of adapter, if necessary to carry out to a controlled plant
When control, need to install one piece of adapter, and when needing that multiple controlled plants are carried out while being controlled, it needs to install simultaneously more
Block adapter, it is clear that during realizing that host computer controls controlled plant in this way, cost is very high, operation
Control is also extremely inconvenient, and extension pio chip 13 is provided in interface conversion equipment in the present invention, and the extension is defeated
Chip 13 can be extended the access interface of controlled plant out, can access multiple controlled plants, Jin Erda simultaneously in this way
The purpose that multiple controlled plants are carried out to a host computer while being controlled.In this way, can not only reduce cost, it is also convenient for more
A controlled plant carries out operation control.
In the utility model embodiment, which includes: that USB turns serial paralled interface chip 11,12 and of receiver board
Pio chip 13 is extended, the input terminal that USB turns serial paralled interface chip 11 is connect by data line with host computer, and USB turns serial paralled interface core
The output end of piece 11 is connect with the input terminal of receiver board 12, and the output end of receiver board 12 and the input terminal of extension pio chip 13 connect
It connects.Wherein, USB turns serial paralled interface chip 11 for receiving the usb signal of host computer transmission, and usb signal is converted to serial ports and is believed
Number and/or parallel port signal, and then rs 232 serial interface signal and/or parallel port signal are sent to receiver board 12；Receiver board 12 is for receiving string
Message number and/or parallel port signal, and rs 232 serial interface signal and/or parallel port signal are replicated；Extension pio chip 13 will be for that will answer
The rs 232 serial interface signal and/or parallel port signal being made are exported to the access interface of multiple controlled plants, described controlled to set to multiple
It is standby to be controlled.From the above description it can be seen that one end of the interface conversion equipment can be connect with host computer by data line,
The other end can be connect with multiple controlled plants, by the conversion process of interface conversion equipment internal signal, may be implemented upper
The purpose that machine controls multiple controlled plants, the communication mode directly connected by data line is easy to operate, time saving province
Power alleviates conventional solution installing cumbersome, the technology that time-consuming caused by adapter on host computer
Problem.
Above content is to the course of work under a kind of structure and this kind of structure of the interface conversion equipment of the utility model
It is described, the form of the other structures of the interface conversion equipment in the utility model is introduced below.
It is the connection established by USB data line in above content, between interface conversion equipment and host computer, it is practical at this
In a novel alternative embodiment, it can be carried out wireless communication between interface conversion equipment and host computer.Specifically, the interface
Conversion equipment further include: wireless transmitter 14；
Wireless transmitter 14 is plugged on the USB interface of host computer, and the usb signal for sending host computer is converted to nothing
Line radiofrequency signal, and radio frequency signal is sent to receiver board 12.
Specifically, wireless transmitter 14 includes: that USB turns parallel port chip 141, expelling plate 142 and wireless transmission with reference to Fig. 2
Chip 143；
The USB interface of input terminal and host computer that USB turns parallel port chip 141 connects, and USB turns the output of parallel port chip 141
End is connect with the input terminal of expelling plate 142, and the output end of expelling plate 142 is connect with wireless transmission chip 143；
USB turns parallel port chip 141 for the usb signal that host computer is sent to be converted to parallel port signal, and by parallel port signal
It is sent to expelling plate 142；
Expelling plate 142 is used to receive USB and turns the parallel port signal of the transmission of parallel port chip 141, and encodes to parallel port signal,
Obtain radio frequency signal；
Wireless transmission chip 143 is used to radio frequency signal being sent to receiver board 12.
Optionally, with reference to Fig. 2, the interface conversion equipment further include: wireless receiving chip 15；
The output end of wireless receiving chip 15 is connect with receiver board 12, for receiving wireless hair under the control of receiver board 12
The radio frequency signal that core shooting piece 143 is sent, and radio frequency signal is sent to receiver board 12；
Receiver board 12 is also used to receive radio frequency signal, and replicates to radio frequency signal, and duplication is obtained
Radio frequency signal by extension pio chip 13 output to multiple controlled plants access interface, with to multiple controlled plants into
Row control.
The process wirelessly controlled below controlled plant host computer is described:
The grafting wireless transmitter 14 on host computer.With reference to Fig. 2, when work, the usb signal that host computer is sent passes through USB
Turn parallel port chip 141, parallel port signal is obtained after converted, parallel port signal reaches expelling plate 142, and expelling plate 142 is to this and message
It number is encoded, obtains radio frequency signal, and then controlled wireless transmission chip 143 and above-mentioned radio frequency signal is sent to nothing
Line receives chip 15.
Wireless receiving chip 15 receives the less radio-frequency letter of the transmission of wireless transmission chip 143 under the control of receiver board 12
Number, and radio frequency signal is sent to receiver board 12；After receiver board 12 receives radio frequency signal, to radio frequency signal
It is replicated, the radio frequency signal that duplication obtains is connect by extension pio chip 13 output to the access of multiple controlled plants
Mouthful, realize the purpose controlled multiple controlled plants.
From the above description it can be seen that the control process realized above by communication can be to avoid using USB
Data line connecting interface conversion equipment and host computer, the simpler convenience of operating process are time saving and energy saving.
The structure and the course of work that above content wirelessly controls host computer to controlled plant into
It has gone and has been discussed in detail, in addition to this, another has been additionally provided in the interface conversion equipment in the utility model and realizes control
Structure.
In an alternative embodiment of the utility model, with reference to Fig. 3, the interface conversion equipment further include: MAX232 core
Piece 16；
The input terminal of MAX232 chip 16 is connected by the USB interface of interface conversion line and host computer, MAX232 chip 16
Output end connect with receiver board 12, wherein the USB interface of the USB interface of interface conversion line one end and host computer connects, interface
9 needle serial port interfaces of the conversion line other end are defeated by the 9 needle serial port interfaces reserved on interface conversion equipment and MAX232 chip
Enter end connection.
9 needle serial port interfaces and 25 needle parallel port interfaces are also reserved on the interface conversion equipment.
Inventor comes with interface conversion line (can be with are as follows: the conversion line of MAX232) in view of some controlled plants, this connects
One end of mouth conversion line is USB interface, and the other end is 9 needle serial port interfaces, i.e. the interface conversion line can be realized usb signal and string
The conversion of message number, then, when work, the USB interface of the USB interface of the interface conversion line and host computer can be connected, so
9 needle serial port interfaces of interface conversion line are connect with the 9 needle serial port interfaces reserved on interface conversion equipment afterwards, in this way, can be real
Existing control of the host computer to controlled plant.
In addition, if being equipped with adapter in host computer (for example, usb signal to be converted to the switching of 25 needle parallel port signals
Card) when, can also by host computer 25 needle parallel ports and interface conversion equipment in reserve the 25 needle parallel port interfaces directly company of foundation
It connects, just no longer needs to the conversion for carrying out signal type, the signal of host computer output can directly reach receiver board 12, by receiver board 12
It is exported after duplication to the access interface of controlled plant.
It should be noted that the ID of the interface conversion equipment is fixed and uniquely, by reserved 9 needle serial port interfaces or
It, can be direct when writing the program that host computer controls multiple controlled plants when 25 needle parallel port interfaces are connect with host computer
The port id that instruction is sent in program is changed to the ID of the interface conversion equipment；And the prior art is installed on host computer and is turned
It connects in the mode of card, needs after being installed adapter, first search adapter ID (the adapter peace being mounted on the host computer
On different host computers, corresponding ID is different), then, then the port id that instruction is sent in program is changed to search
ID.By comparing it is found that the interface conversion equipment in the utility model can be realized carries out seamless compiling on different host computers
Control program is simultaneously run, simpler, not easy to make mistakes.
By the foregoing description of the interface conversion equipment to the utility model it is found that the interface conversion equipment provide it is a variety of
The conversion of mode can be realized the mode that a variety of host computers control controlled plant, and versatility is good, can meet various
Use demand, it is practical.
Above content has carried out in detail three kinds of connection types between the interface conversion equipment and host computer of the utility model
It is thin to introduce, the in-built concrete composition of the interface conversion equipment is introduced below.
Optionally, with reference to Fig. 4, the chip of expelling plate 142 includes: STM32F030C8T6 chip.
The STM32F030C8T6 chip mainly realizes that (usb signal is converted to by CY7C68013A chip by parallel port signal
Parallel port signal) be converted to radio frequency signal (radiofrequency signal for being specifically as follows wireless 433MHz), the chip support two-way
UART interface, respectively control upper computer end rs 232 serial interface signal issue and the output of less radio-frequency.
Optionally, with reference to Fig. 5, the chip of receiver board 12 includes: STM32F103RCT6 chip.
The STM32F103RCT6 chip supports multichannel UART interface (for example, five tunnel UART interfaces), with reference to Fig. 5 (with reference to figure
Three) serial equipment one in 5 drags, wherein interface acquisition usb signal turns the data issued after rs 232 serial interface signal, another way interface all the way
It controls wireless receiving chip 15 and receives radio frequency signal, excess-three road connects MAX232 chip, realizes standard DP9 interface
RS232 signal exports (transmission process that this process is rs 232 serial interface signal)；In addition, (being set as shown in Figure 5 with reference to the parallel port in Fig. 5
Three) standby one drags, receiver board 12 turns parallel port chip with USB and is connected, and when USB port has signal to issue, receiver board 12 is logical by parallel port
News agreement obtains the signal issued, and outputs a signal on other three tunnels and jaws equipment.By above two mode, realization is set
The standby purpose for turning three tunnels all the way.
Optionally, it includes: that USB turns serial port chip and USB turns parallel port chip that USB, which turns serial paralled interface chip 11,；
Wherein, it includes: CH340 chip that USB, which turns serial port chip,；It includes: CY7C68013A chip that USB, which turns parallel port chip,.
In the utility model embodiment, USB is turned parallel port chip and is produced using well-known electronic chip manufacturer Cypress
CY7C68013A chip, it is a USB2.0 controller that this chip, which is kernel with 8051, and main feature is as follows: enhanced
8051 kernels, the optional cpu clock of 48MHz/24MHz/12MHz, the interruption system of extension；I2C,USART；The 16KB piece previous generation
Code/data RAM；Support USB2.0 high speed and full speed transfer；4 programmable bulk/interrupt/synchronous transfer endpoints, a control
System transmission dedicated endpoint 0, a programmable 64 byte bulk/interrupt endpoints；8/16 GPIF (Slave FIFO) interfaces；
USB and GPIF second-level interrupt vector；4 are exclusively used in the endpoint FIFO of USB mass data transmission.
According to CY7C68013A-56PVXC handbook, it is known that its internal height is integrated with the USB2.0 micro-control an of low-power consumption
Device and general programmable interface (GPIF) processed.By 2.0 transceiver of integration USB, it can be achieved that chip and PC seamless communication；Together
When, due to integrating GPIF and master/slave endpoint FIFO (8 or 16 bit data bus), can mostly be counted with simulated implementation
According to interface, such as: ATA, EPP.In design, chip signal line D-, D+ are drawn, as independent USB interface；Meanwhile by core
Piece PB0~PB7 is configured to the data bit under EPP mode；The mode bit under EPP mode is configured by PD1~PD7；By CTL0~
CTL2 is as control bit.Mirror image since chip program is stored in external EEPROM, after needing to compile in practical application
External EEPROM is downloaded to by tool.
The corresponding pin of expelling plate STM32F030C8T6 is connected to CY7C68013A chip, when signaling at USB,
Corresponding signal can be obtained by expelling plate STM32F030C8T6.Chip pin connection schematic diagram is as shown in Figure 6.
The compiling platform and exploitation design requirement provided by official, realizes that USB turns the software programming of DP25 needle parallel port.
Compiler generates final firmware (i.e. firmware), downloads firmware to chip, and installing corresponding driving in computer end can be real
Now equipment is directly operated.As shown in Figure 7.
In the utility model embodiment, wireless transmission chip 143 and wireless receiving chip 15 using 433MHz without
Line technology, in contrast using 433MHz radio band and WIFI, ZigBee, the most outstanding advantage of 433MHz is exactly wireless communication
Number penetrability is strong, and transmission range is farther.The disadvantage is that data transmission bauds only has 9600bps, the data transmission than WIFI, ZigBee
Rate is much smaller, so 433MHz technology is generally only applicable to the lesser application places of volume of transmitted data.Such as: wireless remote
The fields such as survey, industrial data collection, access control system.
433MHz wireless technology supports the topological structure of star network, can realize the network coverage by way of more base stations
The expansion in space；It is one piece of micropower short-range wireless communication module, its main performance is using CC1101 is based in scheme
300~500 meters of spacious transmission range and low current consume.
Specifeca tion speeification is as follows:
Effective frequency: 300-348Mhz, 400-464Mhz, 800-928Mhz；300 to 500 meters of spacious transmission range；Low electricity
Stream loss, reception pattern 15.6mA, receiving sensitivity -108dBm.Suspend mode is less than 0.5uA；Output power is programmable, maximum
Emission current 28mA, reachable+10dBm；Wireless awakening function supports low-power electromagnetic wave to activate function, wireless awakening low-power consumption
Dormant equipment；Channel access (CCA) is cleared up automatically before supporting transmission, i.e. carrier sense system；Efficient SPI is serially compiled
Journey interface can simulate SPI timing with I/O port, can also use the SPI mouth of MCU；Operating temperature range: -40 DEG C~+85 DEG C；Work
Voltage: 1.8 volts -3.6 volts；Maximum transmission rate is up to 500Kbps；11.32 channels are programmable, can also be more with procedure division
Channel.Certainly, the mode of this kind of the utility model embodiment wireless transmission can also be other forms without concrete restriction
Wireless transmission method.
In hardware design, need to consider the resistance matching problem of 433MHz radio frequency output signal.It is first in practical application
First, the yield value of radiofrequency signal under theoretical case can be obtained according to official manual；Then, by the continuous output phase of single-chip microcontroller with letter
Number, and gain of the signal under centre frequency is checked using spectrum analyzer, if surveyed gain differs larger with theoretical gain,
Then adjust the parameter value of L4, C5.In parameter tuning process, using dichotomy, two value ranges are first set, it is current once to survey increasing
Benefit is greater than a rear gain, then reduces corresponding LC value and tested again, vice versa.After repeatedly, one will eventually get
A suitable parameters, when no matter LC parameter increases or reduces, yield value declines, then it is assumed that this parameter is best.
It describes in detail below to the process of serial ports switching:
Serial ports switching realizes USB interface of computer to the conversion between universal serial port.Computer for not serial ports mentions
For quick channel, the USB that traditional serial equipment becomes plug and play is set moreover, turning serial equipment using USB and being equal to
It is standby.In the utility model embodiment, use CH340 as switching chip；CH340 is the switching chip an of usb bus, real
Existing USB turns serial ports or USB turns printing port.Under serial mode, CH340 provides common MODEM cue, by for based on
Calculation machine extends asynchronous serial port, or common serial equipment is directly upgraded to usb bus.As shown in Figure 8.
The Specifeca tion speeification of CH340 is as follows: full speed USB device interface, compatible USB V2.0；Simulation standard serial ports is used
Increase additional serial ports in the former serial ports peripheral equipment of upgrading, or by USB；Serial ports under computer terminal Windows operating system
Application program is completely compatible, it is not necessary to modify；Hardware full duplex serial port, built-in transmitting-receiving buffer area, support communication baud rate 50bps~
2Mbps；Support common MODEM contact restricting the number RTS, DTR, DCD, RI, DSR, CTS；By additional level conversion device, provide
The interfaces such as RS232, RS485, RS422；CH340R chip supports IrDA specification SIR infrared-ray communication, supports baud rate 2400bps
To 115200bps；Software compatibility CH341 can directly use the driver of CH341；Support 5V supply voltage and 3.3V electricity
Source voltage even 3V supply voltage.
Usb signal is switched to by rs 232 serial interface signal using CH340 chip, and is connected to STM32F103RCT6 chip.For output
Interface is for the equipment of DP9 to need that rs 232 serial interface signal is first converted to standard RS232 signal with MAX232 chip.Circuit theory
Figure is as shown in Figure 5.
Optionally, with reference to Fig. 5, in the utility model embodiment, extension pio chip 13 includes: multiple MAX232 chips
And/or 74HC04 chip.
The technical indicator of interface conversion equipment in the utility model is as shown in the table:
| Content | Explanation |
| Power supply mode | 5.5mm plug is connected with equipment, supply voltage DC 9V+10% |
| Signal delay | Wireless signal delay time about 20ms~100ms is related with actual application environment |
| ID configuration | Equipment unique address is set by toggle switch, prevents device signal crosstalk |
| Emit board size | 182mm*98mm |
| Receive board size | 67mm*35mm |
The interface conversion equipment of the utility model not only greatly reduces the use difficulty of experimental facilities and beginner uses
The threshold of equipment, and conventional efficient is improved, so that researcher is concentrated on more energy on experiment content.Due to
The monopoly position of related development company, the price that equipment can not be obtained timely updates or be updated in several year purchased is high, phase
The innovation for believing similar devices, is generalized to more universities and colleges, it will reduction equipment acquisition cost greatly, while promoting user's body
It tests.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of interface conversion equipment characterized by comprising USB turns serial paralled interface chip, receiver board and extension pio chip；
Wherein, the input terminal that the USB turns serial paralled interface chip is connect by data line with host computer, and the USB turns serial paralled interface core
The output end of piece is connect with the input terminal of the receiver board, the input of the output end of the receiver board and the extension pio chip
End connection；
The USB turns the usb signal that serial paralled interface chip is sent for receiving the host computer, and the usb signal is converted to
Rs 232 serial interface signal and/or parallel port signal, and then the rs 232 serial interface signal and/or the parallel port signal are sent to the receiver board；
The receiver board is for receiving the rs 232 serial interface signal and/or the parallel port signal, and to the rs 232 serial interface signal and/or described
Parallel port signal is replicated；
The extension pio chip for will the obtained rs 232 serial interface signal of duplication and/or the parallel port signal export to it is multiple by
The access interface of equipment is controlled, to control multiple controlled plants.
2. interface conversion equipment according to claim 1, which is characterized in that further include: wireless transmitter；
The wireless transmitter is plugged on the USB interface of the host computer, and the usb signal for sending the host computer turns
It is changed to radio frequency signal, and the radio frequency signal is sent to the receiver board.
3. interface conversion equipment according to claim 2, which is characterized in that the wireless transmitter includes: that USB turns parallel port
Chip, expelling plate and wireless transmission chip；
The input terminal that the USB turns parallel port chip is connect with the USB interface of the host computer, and the USB turns the defeated of parallel port chip
Outlet is connect with the input terminal of the expelling plate, and the output end of the expelling plate is connect with the wireless transmission chip；
The USB turns parallel port chip for the usb signal that the host computer is sent to be converted to parallel port signal, and by the parallel port
Signal is sent to the expelling plate；
The expelling plate be used for receive the USB turn parallel port chip transmission the parallel port signal, and to the parallel port signal into
Row coding, obtains radio frequency signal；
The wireless transmission chip is used to the radio frequency signal being sent to the receiver board.
4. interface conversion equipment according to claim 3, which is characterized in that further include: wireless receiving chip；
The output end of the wireless receiving chip is connect with the receiver board, the institute sent for receiving the wireless transmission chip
Radio frequency signal is stated, and the radio frequency signal is sent to the receiver board；
The receiver board is also used to receive the radio frequency signal, and replicates to the radio frequency signal, will replicate
The obtained radio frequency signal is exported by the extension pio chip to the access interface of multiple controlled plants, with
Multiple controlled plants are controlled.
5. interface conversion equipment according to claim 1, which is characterized in that further include: MAX232 chip；
The input terminal of the MAX232 chip is connect with the USB interface of the host computer, the output end of the MAX232 chip with
The receiver board connection.
6. interface conversion equipment according to claim 1, which is characterized in that it includes: USB that the USB, which turns serial paralled interface chip,
Turn serial port chip and USB turns parallel port chip；
Wherein, it includes: CH340 chip that the USB, which turns serial port chip,.
7. the interface conversion equipment according to claim 3 or 6, which is characterized in that the USB turns parallel port chip and includes:
CY7C68013A chip.
8. interface conversion equipment according to claim 1, which is characterized in that the chip of the receiver board includes:
STM32F103RCT6 chip.
9. interface conversion equipment according to claim 3, which is characterized in that the chip of the expelling plate includes:
STM32F030C8T6 chip.
10. interface conversion equipment according to claim 1, which is characterized in that the extension pio chip includes: multiple
MAX232 chip and/or 74HC04 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519869.5U CN209417727U (en) | 2019-04-17 | 2019-04-17 | Interface conversion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519869.5U CN209417727U (en) | 2019-04-17 | 2019-04-17 | Interface conversion equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209417727U true CN209417727U (en) | 2019-09-20 |
Family
ID=67945561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920519869.5U Active CN209417727U (en) | 2019-04-17 | 2019-04-17 | Interface conversion equipment |
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| Country | Link |
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| CN (1) | CN209417727U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109840230A (en) * | 2019-04-17 | 2019-06-04 | 华东师范大学 | Interface conversion equipment |
| CN114595174A (en) * | 2021-08-30 | 2022-06-07 | 浪潮(山东)计算机科技有限公司 | Conversion circuit of PCIE interface and serial port parallel port |
-
2019
- 2019-04-17 CN CN201920519869.5U patent/CN209417727U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109840230A (en) * | 2019-04-17 | 2019-06-04 | 华东师范大学 | Interface conversion equipment |
| CN109840230B (en) * | 2019-04-17 | 2024-05-10 | 华东师范大学 | Interface conversion device |
| CN114595174A (en) * | 2021-08-30 | 2022-06-07 | 浪潮(山东)计算机科技有限公司 | Conversion circuit of PCIE interface and serial port parallel port |
| CN114595174B (en) * | 2021-08-30 | 2023-12-12 | 浪潮(山东)计算机科技有限公司 | Conversion circuit of PCIE interface and serial port parallel port |
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