CN102523141B - Method for networking and cascading electronic equipment by using universal serial port technology - Google Patents
Method for networking and cascading electronic equipment by using universal serial port technology Download PDFInfo
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Abstract
The invention provides a method for networking and cascading electronic equipment by using a universal serial port technology, which consists of a computer universal serial port, a master equipment port A, a master equipment port B, a master equipment level conversion unit, a master equipment control unit, a slave equipment port A, a slave equipment port B, a slave equipment level conversion unit, a slave equipment control unit and a slave equipment optical coupling unit, wherein the computer serial port is connected with the master equipment port A, the master equipment port B is connected with the slave equipment port A, the slave equipment port B is connected with the subordinate slave equipment port A, the computer sends data to each equipment in a broadcasting mode, and the data returned to the computer by each equipment is in a time division multiplexing mode.
Description
Technical field
The present invention relates to the technical field of electronic equipment networking cascade, particularly a kind of by using universal serial port technology to make the method for electronic equipment networking cascade.
Background technology
The method that the networking of at present a lot of electronic equipments and cascade adopt is by methods such as Ethernet, usb bus, I2C bus, CAN bus, USB, although these methods can realize the cascade of electronic equipment, there is technical sophistication, cost is high, communication distance is short, need the restrictions such as trunking.In computer and electronic equipment group-net communication, if by Ethernet cascade, although easily, be not subject to cascade device to count quantitative limitation yet, but need equipment to there is network interface, simultaneously need to be with the support of CPU and relevant built-in application program with network throughput on equipment, and in the time of multiple devices networking, also need to have the support of the network switch.And while adopting I2C bus, the networking of CAN bus mode, be faced with all-purpose computer and there is no this interface of two types, adopt this bus networking of two types, must increase third party device and make these two kinds of bus interface transfer the existing interface of computer to, in the time of equipment network, face the restriction of number of devices and communication distance simultaneously.Although and the mode of usb bus networking is also very convenient, be subject to equally cascade quantity, communication distance and the CPU to equipment and embedded program to be designed with higher requirement.While adopting above-mentioned these modes, there is larger difficulty at the applied software development of computer terminal with debugging simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is: provide that a kind of universal serial port technology makes that the method for electronic equipment networking cascade overcomes that Ethernet, usb bus, I2C bus, CAN bus etc. are high to equipment requirement when the networking by using, exploitation and debugging difficulty large, need the deficiencies such as third party device support, the present invention adopts the subtending port of universal serial port as equipment, and topological structure is daisy chaining.This Cascading Methods do not need the support of third party device, and the CPU to equipment and the requirement of software support aspect are very low especially, and the difficulty of carrying out software development and debugging at computer terminal is low.
The technical scheme that the present invention solves the problems of the technologies described above is: a kind of by using universal serial port technology to make the method for electronic equipment networking cascade, wherein, electronic equipment comprises: computer, a main equipment, some from equipment, main equipment and respectively have two universal serial port ports from equipment, is respectively port A and port B; It is characterized in that: the universal serial port of computer is connected on the port A of main equipment, the port B of main equipment is connected to first from the port A of equipment, first port B from equipment is connected to second from the port A of equipment, the like, connect all devices with the form of daisy chain; In each equipment, there is a CPU or the FPGA control unit as transceiving data, by photoelectric coupled device, all data that send from equipment can be connected together simultaneously, because photoelectric coupled device has the effect of photoelectricity isolation, therefore allly send to the data of computer to be connected to any from equipment to be achieved; At main equipment and eachly have a level shifting circuit unit from equipment, for the level standard that signal level is converted to main equipment, can receives from equipment;
The universal serial port of the method Computer is connected on the receiving terminal of all devices the transmitting terminal of computer general-purpose serial ports by this cascade system of daisy chain simultaneously by main equipment, on concrete computer, first the transmitting terminal of universal serial port enters into main equipment port A, then in main equipment inside, the transmitting terminal of computer general-purpose serial ports is connected on main equipment port B, therefore the transmitting terminal of computer general-purpose serial ports is exported from main equipment port B, and then be connected to from equipment 1 port A, again this line is being connected to from equipment 1 port B from device port A inside, afterwards again from exporting from equipment 1 port B, be connected to from equipment 2 port A, the like, thereby form the type of attachment of daisy chain, the data that computer sends to each equipment are to send with the forms of broadcasting,
The receiving terminal of the universal serial port of the method Computer is connected to main equipment port A, allly sends to the data of computer to be all transmitted to computer by main equipment from equipment; Allly send to the data of computer to export by photoelectric coupled device from equipment, be then connected on main equipment by daisy chaining unification; All equipment can not send data to computer simultaneously, but adopts time-multiplexed mode to send data to computer; Main equipment and eachly when send data to computer from equipment and have one of following two kinds of modes to realize: a kind of mode is that the gating instruction that main equipment sends determines; Another kind of mode be to send gating instruction by computer, this gating instruction be sent as broadcast mode, each equipment determines whether to computer transmission data according to the gating instruction receiving.
Wherein, main equipment and can increase photoelectric conversion module from the level conversion unit between equipment, makes main equipment and from using optical fiber to connect between equipment.
Wherein, main equipment and each mode that when sends data to computer from equipment are gating instruction that main equipment sends while determining, and this gating instruction is with serial data form, transmits by RS232 level, and uniformly-spaced the time sends in this gating instruction.
Wherein, concrete methods of realizing can be as follows: computer general-purpose serial ports is connected with main equipment port A, signal transmission between main equipment port A and main equipment port B, main equipment level conversion, main equipment control unit is that signal level is converted to the level standard that computer and main equipment can receive, and to be connected to main equipment port B be the needs for equipment cascading to some signals simultaneously; Main equipment port B be connected from equipment 1 port A, from equipment 1 port A and be the level standard that signal level is converted to main equipment, can receives from equipment 1, from equipment 2, computer from equipment 1 port B, from equipment 1 level conversion, from the signal transmission between equipment 1 control unit, to be connected to from equipment 1 port B be the needs for equipment cascading to some signals simultaneously; From equipment 1 port B be connected from equipment 2 port A, from equipment 2 port A and be the level standard that signal level is converted to main equipment, can receives from equipment 1, from equipment 2, computer from equipment 2 port B, from equipment 2 level conversion, from the signal transmission between equipment 2 control units, to be connected to from equipment 2 port B are the needs for equipment cascading to some signals simultaneously; From equipment 1 control unit be connected from equipment 1 photoelectric coupled device, be connected to from equipment 1 port B with from equipment 1 port A from equipment 1 photoelectric coupled device output; From equipment 2 control units be connected from equipment 2 photoelectric coupled devices, be connected to from equipment 2 port B with from equipment 2 port A from equipment 2 photoelectric coupled devices; By main equipment port B with from equipment 1 port B, from being connected of equipment 2 port A, having realized will be from equipment 1 photoelectric coupled device output, be connected to main equipment control unit from equipment 2 photoelectric coupled devices outputs simultaneously; On whole link, there are 4 circuit-switched data stream signals; The 1st circuit-switched data stream signal is that the signal sending out from computer general-purpose serial ports is transferred to main equipment and respectively from equipment, then enters into the control unit of each equipment through level conversion separately with the forms of broadcasting by the cascade of each equipment room; The 2nd circuit-switched data stream signal is that the signal sending out from main equipment control unit is cascaded to respectively from equipment through main equipment level conversion, main equipment port B, be transferred to respectively from equipment, then through respectively entering into the respectively control unit from equipment from the level conversion of equipment with the form of broadcast; The 3rd circuit-switched data stream signal is from respectively sending through after optocoupler effect from the control unit of equipment, then by the laggard device control cell of becoming owner of of cascade of each equipment; The 4th circuit-switched data stream signal is to send out from main equipment control unit, after main equipment level conversion enters main equipment port B, main equipment port A, is connected on computer general-purpose serial ports; The transmission of this 4 circuit-switched data stream signal of process, just can realize computer and each equipment carries out exchanges data, has realized use universal serial port technology and has made electronic equipment networking cascade.
Wherein, on realizing the basis of 3 equipment cascadings, said method can carry out as required multiple equipment cascadings.
The present invention's advantage is compared with prior art as follows:
1, the interfacing that the present invention adopts is simple, and for circuit design and software development, all difficulty is little, simultaneously because circuit is simple, therefore realizes that cost is low, reliability is high;
2, computer of the present invention all has universal serial port, also can turn serial mode by USB realize even without standard serial port, does not need the third party device of both expensive;
3, applying flexible of the present invention, according to actual needs flexible design host-host protocol.
Accompanying drawing explanation
Fig. 1 is functional block diagram of the present invention.
Fig. 2 is the electrical schematic diagram of an embodiment of the present invention.
In figure, 1 is computer general-purpose serial ports; 2 is main equipment port A; 3 is main equipment port B; 4 is main equipment level conversion; 5 is main equipment control unit; 6 is from equipment 1 port A; 7 is from equipment 1 port B; 8 is from equipment 1 level conversion; 9 is from equipment 1 control unit; 10 is from equipment 1 photoelectric coupled device; 11 is from equipment 2 port A; 12 is from equipment 2 port B; 13 is from equipment 2 level conversion; 14 is from equipment 2 control units; 15 is from equipment 2 photoelectric coupled devices.
Embodiment
Existing accompanying drawings embodiments of the invention.But following embodiment only limits to explain the present invention, and protection scope of the present invention should comprise the full content of claim, and can realize the full content of the claims in the present invention to person skilled in art by following examples.
In Fig. 1, electronic equipment comprises: computer, a main equipment, some from equipment, and main equipment and respectively have two universal serial port ports from equipment, is respectively port A and port B; Computer general-purpose serial ports 1 is connected with main equipment port A 2, signal transmission between main equipment port A 2 and main equipment port B 3, main equipment level conversion 4, main equipment control unit 5 is that signal level is converted to the level standard that computer and main equipment can receive, and to be connected to main equipment port B3 be the needs for equipment cascading to some signals simultaneously.Main equipment port B 3 be connected from equipment 1 port A 6, from equipment 1 port A 6 and be the level standard that signal level is converted to main equipment, can receives from equipment, computer from equipment 1 port B 7, from equipment 1 level conversion 8, from the signal transmission between equipment 1 control unit 9, to be connected to from equipment 1 port B 7 are the needs for equipment cascading to some signals simultaneously.From equipment 1 port B 7 be connected from equipment 2 port A 11, from equipment 2 port A 11 and be the level standard that signal level is converted to main equipment, can receives from equipment, computer from equipment 2 port B 12, from equipment 2 level conversion 13, from the signal transmission between equipment 2 control units 14, to be connected to from equipment 2 port B 12 are the needs for equipment cascading to some signals simultaneously.From equipment 1 control unit 9 be connected from equipment 1 photoelectric coupled device 10, be connected to from equipment 1 port B 7 with from equipment 1 port A 6 from equipment 1 photoelectric coupled device 10 output.From equipment 2 control units 14 be connected from equipment 2 photoelectric coupled devices 15, be connected to from equipment 2 port B 12 with from equipment 2 port A 11 from equipment 2 photoelectric coupled devices 15.By main equipment port B 3 with from equipment 1 port B 7, from being connected of equipment 2 port A11, realized and will export from equipment 1 photoelectric coupled device 10, and export and be connected to main equipment control unit 5 simultaneously from equipment 2 photoelectric coupled devices 15.On whole link, there are 4 circuit-switched data stream signals.The 1st circuit-switched data stream signal is that the signal sending out from computer general-purpose serial ports 1 is transferred to main equipment and respectively from equipment, then enters into the control unit of each equipment through level conversion separately with the forms of broadcasting by the cascade of each equipment room; The 2nd circuit-switched data stream signal is that the signal sending out from main equipment control unit 5 is cascaded to respectively from equipment through main equipment level conversion 4, main equipment port B 3, be transferred to respectively from equipment, then through respectively entering into the respectively control unit from equipment from the level conversion of equipment with the form of broadcast; The 3rd circuit-switched data stream signal is from respectively sending through after optocoupler effect from the control unit of equipment, then by the laggard device control cell 5 of becoming owner of of cascade of each equipment; The 4th circuit-switched data stream signal is to send out from main equipment control unit 5, after main equipment level conversion 4 enters main equipment port B3, main equipment port A 2, is connected on computer general-purpose serial ports 1.The transmission of this 4 circuit-switched data stream signal of process, just can realize computer and each equipment carries out exchanges data.In Fig. 1, only draw the form of 3 equipment cascadings, actually can carry out as required multiple equipment cascadings.
Electrical schematic diagram in Fig. 2 is the electrical schematic diagram of an equipment, in the drawings by the setting of some wire jumpers, equipment can be made as to main equipment or from equipment.In Fig. 2 embodiment, by the wire jumper setting of J2, J4, J5, J6 and the pattern setting of SW1, realize and used same circuit just can make equipment not only can be used as main equipment but also can be used as from equipment, reach the flexibility in application.
Two main operations of the present embodiment are as follows:
(1) computer sends data to each equipment
At computer, during to each equipment sending data, data are through the 1st above-mentioned circuit-switched data stream signal.In conjunction with Fig. 2, concerning each equipment, then first the signal that computer sends to each equipment enter into IC1 through J1, through the level conversion of IC1, enters into IC3.In IC3, determine according to the information comprising in data whether these data that receive are own used.
(2) each equipment return data is to computer
Each equipment return data, in the process of computer, complete through above-mentioned 3 circuit-switched data stream signals.First main equipment flows signal to respectively sending gating signal from equipment through the 2nd circuit-switched data.When respectively receiving gating signal from equipment, from the control unit of equipment determine oneself now whether should return data to computer.If desired return data is to computer, and the data of returning are transferred to main equipment control unit 5 through the 3rd circuit-switched data stream signal, and main equipment control unit 5 returns to computer by what receive from device data by the 4th circuit-switched data stream signal.
As shown in Figure 2, J1 is RJ45 socket, as the port A of equipment; J3 is RJ45 socket, as the port B of equipment; IC1 is the beautiful MAX3250 that believes (Maxim) company, as the level switch module of equipment; IC2 is TLP421-1, as the optocoupler unit from equipment; IC3 adopts the XC3S1000-4FT256 of the Spartan III series of Xilinx company, as the control unit of each equipment.In the time that circuit arrangement shown in Fig. 2 uses as main equipment, first by the toggle switch pattern of SW1, function is set, make IC3 be switched to main equipment operational mode state.2 pin of J1 are connected on 2 pin of computer general-purpose serial ports, i.e. the receiving terminal of computer general-purpose serial ports, and 3 pin of J1 are connected on 3 pin of computer general-purpose serial ports, i.e. the transmitting terminal of computer general-purpose serial ports.2 pin of J1 and 3 pin are connected to 17,19 of IC1 simultaneously and connect on a pin; Two IO pins of IC3 are connected on 4,2 pins of IC1, so just realized the conversion of the RS232 level of J1 side and the Transistor-Transistor Logic level of IC3 side by IC1, thereby realize the data communication between IC3 and computer, i.e. the data communication of main equipment and computer general-purpose serial ports.Because current device is main equipment, therefore 1 of IC3 IO pin is connected with 5 pin of IC1, IC1 exports by 16 pin of IC1 after converting the TTL signal of IC3 output to RS232 signal like this, simultaneously by the 2 and 3 pin short circuit cap short circuits of J2, this signal has just been connected to J3 above like this, and this signal can be used as from the gating signal of the return data of equipment.J4, J5, J6 are used respectively to short circuit cap short circuit, realized so all connections at main equipment end from equipment optocoupler output signal, not and be connected on an IO pin of IC3, thereby do not make main equipment can receive all data of returning from equipment.Signal on J1 and J3 all interconnects, and so just can realize the cascade of the daisy chain of multiple equipment.When circuit arrangement shown in Fig. 2 is when using from equipment, first by the pattern of SW1, function is set, IC3 is switched to from equipment operational mode state.J1 is connected with the J3 of main equipment in device external, so first realizes the data that can receiving computer send from equipment.RS232 signal is identical with conversion and the main equipment of TTL signal.To receive from equipment the gating signal that main equipment sends over, therefore need the 1 and 2 pin short circuit cap short circuits of J2, due on main equipment, 2 and 3 pins of J2 are short circuits, therefore after main equipment and subordinate devices cascaded, the gating signal of sending out from 16 human hair combing wastes of IC1 on main equipment, just be connected to from 18 pins of the IC1 of equipment, then IC1 is converted to this RS232 level signal after TTL signal, from the 3 pin outputs of IC1, and be connected on an IO pin of IC3, receive thereby realize from equipment the gating signal that main equipment sends over.Will send data to main equipment from equipment, except will sending according to the gating signal receiving, also need J4, J5, J6 to remain on open-circuit condition in good time, the data that send from equipment output to IC2 by an IO pin of IC3.Owing to being at short circuit state at main equipment end J4, J5, J6, after therefore all signals from equipment output are isolated by IC2, connecting together at active and standby end, and can be received by main equipment.In the time of multiple subordinate devices cascaded, need to, in device external, the previous J3 from equipment be connected to next from the J1 of equipment.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (4)
1. by using universal serial port technology to make a method for electronic equipment networking cascade, wherein, electronic equipment comprises: computer, a main equipment, some from equipment, and main equipment and respectively have two universal serial port ports from equipment, is respectively port A and port B; It is characterized in that: the universal serial port of computer is connected on the port A of main equipment, the port B of main equipment is connected to first from the port A of equipment, first port B from equipment is connected to second from the port A of equipment, the like, connect all devices with the form of daisy chain; In each equipment, there is a CPU or the FPGA control unit as transceiving data, by photoelectric coupled device, all data that send from equipment can be connected together simultaneously, because photoelectric coupled device has the effect of photoelectricity isolation, therefore allly send to the data of computer to be connected to any from equipment to be achieved; At main equipment and eachly have a level shifting circuit unit from equipment, for the level standard that signal level is converted to main equipment, can receives from equipment;
The universal serial port of the method Computer is connected on the receiving terminal of all devices the transmitting terminal of computer general-purpose serial ports by this cascade system of daisy chain simultaneously by main equipment, on concrete computer, first the transmitting terminal of universal serial port enters into main equipment port A, then in main equipment inside, the transmitting terminal of computer general-purpose serial ports is connected on main equipment port B, therefore the transmitting terminal of computer general-purpose serial ports is exported from main equipment port B, and then be connected to from equipment 1 port A, again this line is being connected to from equipment 1 port B from device port A inside, afterwards again from exporting from equipment 1 port B, be connected to from equipment 2 port A, the like, thereby form the type of attachment of daisy chain, the data that computer sends to each equipment are to send with the forms of broadcasting,
The receiving terminal of the universal serial port of the method Computer is connected to main equipment port A, allly sends to the data of computer to be all transmitted to computer by main equipment from equipment; Allly send to the data of computer to export by photoelectric coupled device from equipment, be then connected on main equipment by daisy chaining unification; All equipment can not send data to computer simultaneously, but adopts time-multiplexed mode to send data to computer; Main equipment and eachly when send data to computer from equipment and have one of following two kinds of modes to realize: a kind of mode is that the gating instruction that main equipment sends determines; Another kind of mode be to send gating instruction by computer, this gating instruction be sent as broadcast mode, each equipment determines whether to computer transmission data according to the gating instruction receiving;
Concrete methods of realizing can be as follows: computer general-purpose serial ports (1) and main equipment port A(2) be connected, main equipment port A(2) and main equipment port B(3), signal transmission between main equipment level conversion (4), main equipment control unit (5) is that signal level is converted to the level standard that computer and main equipment can receive, some signals are connected to main equipment port B(3 simultaneously) be the needs for equipment cascading; Main equipment port B(3) with from equipment 1 port A(6) be connected, from equipment 1 port A(6) and from equipment 1 port B(7), be the level standard that signal level is converted to main equipment, can receives from equipment 1, from equipment 2, computer from equipment 1 level conversion (8), from the signal transmission between equipment 1 control unit (9), simultaneously some signals are connected to from equipment 1 port B(7) be the needs for equipment cascading; From equipment 1 port B(7) with from equipment 2 port A(11) be connected, from equipment 2 port A(11) and from equipment 2 port B(12), be the level standard that signal level is converted to main equipment, can receives from equipment 1, from equipment 2, computer from equipment 2 level conversion (13), from the signal transmission between equipment 2 control units (14), simultaneously some signals are connected to from equipment 2 port B(12) be the needs for equipment cascading; From equipment 1 control unit (9) be connected from equipment 1 photoelectric coupled device (10), be connected to from equipment 1 port B(7 from equipment 1 photoelectric coupled device (10) output) and from equipment 1 port A(6); From equipment 2 control units (14) be connected from equipment 2 photoelectric coupled devices (15), be connected to from equipment 2 port B(12 from equipment 2 photoelectric coupled devices (15)) and from equipment 2 port A(11); By main equipment port B(3) with from equipment 1 port B(7), from equipment 2 port A(11) be connected, having realized will be from equipment 1 photoelectric coupled device (10) output, be connected to main equipment control unit (5) from equipment 2 photoelectric coupled devices (15) output simultaneously; On whole link, there are 4 circuit-switched data stream signals; The 1st circuit-switched data stream signal is that the signal sending out from computer general-purpose serial ports (1) is transferred to main equipment and respectively from equipment, then enters into the control unit of each equipment through level conversion separately with the forms of broadcasting by the cascade of each equipment room; The 2nd circuit-switched data stream signal is signal process main equipment level conversion (4), the main equipment port B(3 sending out from main equipment control unit (5)) be cascaded to respectively from equipment, be transferred to respectively from equipment, then through respectively entering into the respectively control unit from equipment from the level conversion of equipment with the form of broadcast; The 3rd circuit-switched data stream signal is from respectively sending through after optocoupler effect from the control unit of equipment, then by the laggard device control cell (5) of becoming owner of of cascade of each equipment; The 4th circuit-switched data stream signal is to send out from main equipment control unit (5), enters main equipment port B(3 through main equipment level conversion (4)), main equipment port A(2) after, be connected on computer general-purpose serial ports (1); The transmission of this 4 circuit-switched data stream signal of process, just can realize computer and each equipment carries out exchanges data, has realized use universal serial port technology and has made electronic equipment networking cascade.
2. according to claim 1 a kind of by using universal serial port technology to make the method for electronic equipment networking cascade, it is characterized in that: main equipment and can increase photoelectric conversion module from the level conversion unit between equipment, makes main equipment and from using optical fiber to connect between equipment.
3. according to claim 1 a kind of by using universal serial port technology to make the method for electronic equipment networking cascade, it is characterized in that: main equipment and each mode that when sends data to computer from equipment are that gating instruction that main equipment sends is while determining, this gating instruction is with serial data form, transmits by RS232 level, and uniformly-spaced the time sends in this gating instruction.
4. according to claim 1 a kind of by using universal serial port technology to make the method for electronic equipment networking cascade, it is characterized in that: realize in method described in claim 1 on the basis of 3 equipment cascadings and can carry out as required multiple equipment cascadings.
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| TWI506536B (en) * | 2013-01-10 | 2015-11-01 | Accton Technology Corp | Executive device and stack method and stack system thereof |
| CN103414617B (en) * | 2013-08-09 | 2017-02-01 | 深圳市富斯遥控模型技术有限公司 | Serial I-BUS structure applied to remote control model and communication method thereof |
| CN108133585B (en) * | 2016-12-01 | 2020-02-07 | 深圳市三诺数字科技有限公司 | Equipment continuous control device, method and system |
| CN109656849B (en) * | 2018-12-25 | 2022-02-08 | 深圳市慎勇科技有限公司 | Bus address distribution system based on cascade father node gating and communication method |
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