CN201503585U - Multi-serial-port data communication card equipment based on CPCI bus - Google Patents
Multi-serial-port data communication card equipment based on CPCI bus Download PDFInfo
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- CN201503585U CN201503585U CN2009200700022U CN200920070002U CN201503585U CN 201503585 U CN201503585 U CN 201503585U CN 2009200700022 U CN2009200700022 U CN 2009200700022U CN 200920070002 U CN200920070002 U CN 200920070002U CN 201503585 U CN201503585 U CN 201503585U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model relates to multi-serial-port data communication card equipment based on a CPCI bus, which comprises a CPCI bus communication module, a magnetic isolation module, at least two UART communication management modules with automatic RS485 communication stream control functions and RS232/rs485 two-in-one communication receiving and transmitting modules with amount corresponding to that of the UART communication management module. The CPC bus communication module is connected with a host machine system through the CPCI bus, and the CPCI bus communication module is connected to an RS232/RS485 bus through the UART communication management module, the magnetic isolation module and the corresponding RS232/RS485 two-in-one communication receiving and transmitting modules sequentially. The multi-serial-port data communication card equipment is reliable in system operation, simplifies a switching circuit, realizes intellectualization, and has higher data transmission speed, time sequence precision and transient common mode rejection capacity. Power consumption of the multi-serial-port data communication card equipment utilizing the magnetic isolation module is 1/10-1/50 of that of multi-serial-port communication equipment utilizing a photoelectric coupler, serial communication data transmission speed can achieve 230400bps, and then the multi-serial-port data communication card equipment is safe and reliable, and is relatively wide in application range.
Description
Technical field
The utility model relates to data communication field, and particularly the cpci bus communication technical field specifically is meant a kind of multi-serial port data communication card equipment based on cpci bus.
Background technology
In the modern society,, many more application have been obtained at industrial control field along with the continuous development of data communication technology.Simultaneously, in widely used industrial computer field, the RS232/RS485 serial communication has become conventional pattern.
As compression PCI (Compact PCI abbreviates CPCI as) technical manual, make popular pci bus compliant architectures to realize with the specification of Eurocard.This modular CPCI template can flexible combination become to be fit to the system that various different industry spot are used.In order to improve the maintainability of CPCI system, need on the CPCI product, increase the hot plug function, make the CPCI template not needing under the power cutoff situation, insert or extract the system that is moving, and do not influence or destroy the operate as normal of system, thereby lay the foundation for high availability (High Availability) design.
PICMG 2.0Revision 3.0 has stipulated on the backboard between each slot, system's groove and backboard, strict interconnected relationship between I/O template and the backboard; The structure and the size of backboard, template and front and back panel have been defined; Define 32 PCI of P1 support and operate, P1 and P2 support 64 PCI operations, and P3, P4 and P5 leave user's use for or expand usefulness as bus.Standard also is the Clock signal distributions of 33MHz and 66MHz frequency of operation, has defined the strict design rule.Standard has also defined System Management Bus, and be on the backboard each slot definition unique physical address corresponding.Monolithic conductive and ESD circuit design that the CPCI system is made up of metal shell and front and back panels make CPCI have ELECTROMAGNETIC RADIATION SHIELDING and static releasability, show good Electro Magnetic Compatibility.
The RS-232 agreement is a communication standard that is used for modulator-demodular unit, printer and other PC peripheral hardware at first, and the baud rate of single-ended 20kbps is provided, and speed was increased to 1Mbps afterwards.Other technical indicator of RS-232 comprises: nominal ± 5V transmission level, ± 3V incoming level (at interval/symbol), 2V common mode inhibition, 2200pF maximum cable load capacitance, 300 maximum drive device output resistances, minimum receiver (load) impedance of 3k, 100 feet (representative value) maximum cable lengths.The RS-232 agreement is merely able to be used for Point-to-Point Communication System, can not be used for multipoint communication system, and these restrictions all must be deferred to by all RS-232 systems.
The RS-422 agreement is unidirectional, full-duplex communication agreement, is fit to noisy industrial environment.The RS-422 standard allows single driver to communicate by letter with a plurality of receivers, and data-signal adopts the differential transfer mode, and speed reaches as high as 50Mbps.The receiver common mode range is ± 7V, and driver output resistance maximal value is 100, and receiver input impedance can be low to moderate 4k.
The RS-485 agreement is two-way, half-duplex operation agreement, allows a plurality of drivers and receiver to be articulated on the bus, and wherein each driver can both break away from bus.This standard satisfies the requirement of all RS-422, and stronger than RS-422 stability.(7V extremely+12V) to have higher receiver input impedance and wideer common mode range.Driver can drive 32 unit loads, promptly allows the receiver of 32 12k in parallel on the bus.For the higher receiver of input impedance, allow the unit load number of connection also higher on the bus.But RS-485 receiver arbitrary combination is connected to same bus, but will guarantee that the actual parallel impedance of these circuit is not higher than 32 unit loads (375).This shows that RS485 is applicable to many host/drive industrial environment, the not high occasion of the long light traffic rate of communication distance.
Simultaneously, iCoupler is a patent isolation technology of ADI company.It is a kind of transformer based on chip size, and non-traditional based on the combination with photodiode of light emitting diode (LED) that photoelectrical coupler adopted.Because it has cancelled the opto-electronic conversion link that influences efficient in the photoelectrical coupler, so its power consumption only is 1/10～1/50 of a photoelectrical coupler.Adopted the digital isolator of iCoupler technology to utilize flat magnetic field patent isolation technology, and adopted transformer patented technology integrated transformer to drive and receiving circuit, no longer needed to drive 34 simultaneously " external circuit, thereby do well at aspect of performance.Digital isolator has used the chip-scale manufacturing process directly to make the iCoupler transformer on chip, only need a chip just can support high-speed data communication, can satisfy the strict insulation request of medical equipment, high voltage commercial Application, power supply and other high-isolation environment simultaneously.The channel isolation of iCoupler digital isolator has the message transmission rate higher than photoelectrical coupler, time sequence precision and transient state common mode inhibition capacity, therefore the iCoupler digital isolator is highly suitable for various industrial application, comprises data communication, data converter interface and other hyperchannel isolation applications.
Though the comparative maturity that above technology has all developed does not also have a kind of technical scheme above technological means can be integrated application, and is applied to the data communication aspect of industrial computer.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, provides a kind of and can effectively realize intelligent multi-serial port data communication, expansion is convenient, safe and reliable, power consumption is lower, message transmission rate is higher, the scope of application is comparatively widely based on the multi-serial port data communication card equipment of cpci bus.
In order to realize above-mentioned purpose, the multi-serial port data communication card equipment based on cpci bus of the present utility model is as follows:
Should be based on the multi-serial port data communication card equipment of cpci bus, its principal feature is that described equipment comprises:
The cpci bus communication module, this cpci bus communication module is connected with host computer system by cpci bus, and submits the data that issue of Data Receiving host computer system to host computer system;
At least two UART communication management module with automatic RS485 communication Flow Control function, described each UART communication management module is connected with described cpci bus communication module respectively, the transmitting-receiving that communicates data is handled, and sends interrupt notification by cpci bus to host computer system when the data transmission finishes or receive data arrival;
The magnetic isolation module communicates the transmission of signal; With
With the two-in-one transceiver communication module of the corresponding RS232/RS485 of described UART communication management module quantity, the two-in-one transceiver communication module of described each RS232/RS485 all inserts the RS232/RS485 bus, and described each UART communication management module is connected with the two-in-one transceiver communication module of corresponding RS232/RS485 by described magnetic isolation module, communicates the logic level transition and the transmission of signal.
Should be PCI slave unit manager based on the cpci bus communication module in the multi-serial port data communication card equipment of cpci bus.
Should based on the UART communication management module in the multi-serial port data communication card equipment of cpci bus UART contact manager with automatic RS485 communication Flow Control function with automatic RS485 communication Flow Control function.
Should be iCoupler magnetic isolator based on the magnetic isolation module in the multi-serial port data communication card equipment of cpci bus.
Should be the two-in-one communication transceiver of RS232/RS485 based on the two-in-one transceiver communication module of the RS232/RS485 in the multi-serial port data communication card equipment of cpci bus.
Should be 8 based on the quantity of the UART communication management module with automatic RS485 communication Flow Control function in the multi-serial port data communication card equipment of cpci bus, the quantity of the two-in-one transceiver communication module of described RS232/RS485 also be 8.
Adopted the multi-serial port data communication card equipment based on cpci bus of this utility model, owing to wherein adopted cpci bus communication interface mode, and be connected with system hardware and adopt 2mm high density pin type connector, thereby make system that operation is more reliable in industrial application; And CPCI has the hot plug function, can not need under the power cutoff situation, inserts or extracts the system that is moving and do not influence or destroy the operate as normal of system, thereby lay the foundation for high availability; The extensibility of CPCI allows a hardware system platform to expand 78 serial port boards at most under the situation that does not increase the PCI bridge, promptly can expand to reach 56 serial ports at most; Simultaneously, the utility model has been realized Based Intelligent Control RS485 communication, and RS485 is a half duplex series communication, has automatic RS485 communication Flow Control function in the UART communication control module wherein, thereby simplified the RS232/RS485 commutation circuit greatly, also made the switching controls of RS232/RS485 really realize intellectuality; Because the iCoupler magnetic isolation technology (magnetic isolation module) that has wherein adopted has effectively avoided influencing in the photoelectrical coupler opto-electronic conversion link of efficient, thereby power consumption is very low, only, have the message transmission rate higher, time sequence precision and transient state common mode inhibition capacity than photoelectrical coupler for 1/10～1/50 of the multi-serial communication equipment that uses photoelectrical coupler; The serial communication message transmission rate can reach 230400bps, and is not only safe and reliable, and the scope of application is comparatively extensive.
Description of drawings
Fig. 1 is the multi-serial port data communication card equipment hardware configuration synoptic diagram based on cpci bus of the present utility model.
Embodiment
In order more to be expressly understood technology contents of the present utility model, describe in detail especially exemplified by following examples.
See also shown in Figure 1, should be based on the multi-serial port data communication card equipment of cpci bus, comprising:
(1) cpci bus communication module, this cpci bus communication module is connected with host computer system by cpci bus, and submits the data that issue of Data Receiving host computer system to host computer system; Described cpci bus communication module is a PCI slave unit manager;
(2) at least two UART communication management module with automatic RS485 communication Flow Control function, described each UART communication management module is connected with described cpci bus communication module respectively, the transmitting-receiving that communicates data is handled, and sends interrupt notification by cpci bus to host computer system when the data transmission finishes or receive data arrival; Described UART communication management module with automatic RS485 communication Flow Control function is the UART contact manager with automatic RS485 communication Flow Control function; In embodiment of the present utility model, described quantity with UART communication management module of automatic RS485 communication Flow Control function is 8;
(3) magnetic isolation module communicates the transmission of signal; Described magnetic isolation module is an iCoupler magnetic isolator;
(4) with the two-in-one transceiver communication module of the corresponding RS232/RS485 of described UART communication management module quantity, the two-in-one transceiver communication module of described each RS232/RS485 all inserts the RS232/RS485 bus, and described each UART communication management module is connected with the two-in-one transceiver communication module of corresponding RS232/RS485 by described magnetic isolation module, communicates the logic level transition and the transmission of signal; The two-in-one transceiver communication module of described RS232/RS485 is the two-in-one communication transceiver of RS232/RS485; Simultaneously, in embodiment of the present utility model, the quantity of the two-in-one transceiver communication module of described RS232/RS485 also is 8.
In the middle of reality is used, comprise cpci bus interface controller, RS232 signal transceiver, RS485 signal transceiver, iCoupler magnetic isolator in the hardware configuration of the multi-serial port data communication card equipment based on cpci bus of the present utility model.This equipment can directly use at the hardware platform that follow the CPCI standard, expand to host computer system 8 standard form UART, by RS232 signal transceiver or RS485 signal transceiver, can with the RS232 or the RS485 devices communicating in the external world.Have the magnetic isolator in this equipment simultaneously, meet State Grid's industry magnetic isolation safe standard.This fastener has characteristics such as intelligence is installed, intelligence switching RS232/RS485 communication pattern.
The cpci bus standard is another field application extension of pci bus standard, and the agreement of being followed is the PCI2.0 protocol specification, and the CPCI slave unit controller and the universal PC I slave unit that use on the hardware are as broad as long.The cpci bus slave unit controller of equipment of the present utility model is connected with the cpci bus of hardware platform, plug and play characteristic according to PCI equipment, behind the CPCI groove of fastener insertion system device, WINDOWS on the general-purpose platform, LINUX system can detect the insertion of new hardware automatically, according to PCI device resource allocation rule, system distributes input/output space and shared interrupt number automatically.Equipment is different with the input/output space of common input-output device at the input/output space that obtains, be a kind of memory-mapped I/O space (MMIO that is called, memory mapI/O), this block I/O spatial data of read-write can be operated as the read/write memory piece by system, and the speed ratio physical I of access/O space read-write is faster.
Nearly 8 UART contact managers can also be set on the equipment of the present utility model, and these 8 UART contact managers and the perfection of CPCI slave unit controller combine.After the WINDOWS on the platform, LINUX system identification fastener Resources allocation, software systems on the platform (driving) can derive 8 UART equipment, and corresponding 8 UART are divided into 8 parts with the MMIO space, transmission data buffer and reception data buffer as each UART, software systems (driving) on the platform have also been used the shared interrupt techniques in the operating system simultaneously, picking out according to the zone bit of fastener interruption status word is the interrupt request of being sent by which UART, thereby dispatches the Interrupt Process procedure function of this UART.
The UART contact manager can be drawn the flow control signal of RS485 communication transceiver, and this UART contact manager both can have been done RS232 communication and also can do the RS485 telecommunication management like this.In the technical solution of the utility model, the switching controls of RS232/RS485 is implanted in the software systems (driving), and the switching controls of RS232/RS485 is in the past finished by the hardware setting circuit of periphery, so the switching controls of the RS232/RS485 in the utility model has really realized intellectuality.
Should handle comprising steps of equipment initialization processing operation, data sending processing and Data Receiving based on the method for above-mentioned equipment realization based on the multi-serial port data communication of cpci bus, described steps of equipment initialization processing operation may further comprise the steps:
(11) described equipment inserts the CPCI interface slot of host computer system, and host computer system is shared interrupt number according to PCI device resource allocation rule for this devices allocation;
(12) described host computer system is this devices allocation memory-mapped I/O space;
(13) described host computer system is created and the corresponding UART virtual unit of described UART communication management module quantity, and with described memory-mapped I/O space segmentation be and the corresponding part of each UART virtual unit, as the transmission data buffer and the reception data buffer of each UART virtual unit;
Described data sending processing may further comprise the steps:
(21) described host computer system will need the copying data that the sends transmission data buffer in the described memory-mapped I/O space;
(22) described host computer system sends buffer zone by the corresponding corresponding data of UART communication management module of described cpci bus communication module notice has data to be sent;
(23) described UART communication management module reading corresponding data sends the data in the buffer zone, and the line data of going forward side by side conversion and transmit operation may further comprise the steps:
(a) described UART communication management module is converted to actual logic level signal with the data that read;
(b) logic level signal after described UART communication management module will be changed sends the corresponding two-in-one transceiver communication module of RS232/RS485 to by the magnetic isolator;
(c) the two-in-one transceiver communication module of described RS232/RS485 is converted to the electric signal that meets IEA232/IEA485 communication protocol with described logic level signal, and sends this electric signal to remote equipment by the RS232/RS485 bus;
(d) described UART communication management module sends by cpci bus communication module notice host computer system data and finishes;
Described Data Receiving is handled, and may further comprise the steps:
(31) when the remote equipment on the RS232/RS485 bus had data to arrive the two-in-one transceiver communication module of described RS232/RS485, described equipment carried out Data Receiving and conversion operations, and obtains receiving data; Described Data Receiving and conversion operations may further comprise the steps:
(a) will to meet the transform electric of IEA232/IEA485 communication protocol be logic level signal to the two-in-one transceiver communication module of described RS232/RS485;
(b) the two-in-one transceiver communication module of described RS232/RS485 is sent to corresponding UART communication management module with this logic level signal by the magnetic isolator;
(c) described UART communication management module is converted to actual reception data with the logic level signal that receives;
(32) described UART communication management module is in the copying data that the receives reception data buffer to the described memory-mapped I/O space, and sends hardware interrupts to described host computer system and notify this host computer system reading of data;
(33) described host computer system judges it is which UART communication management module receives data by the zone bit of the interruption status word of this hardware interrupts;
(34) described host computer system is dispatched the pairing Interrupt Process procedure function of this UART communication management module, with described reception data transfer to the upper strata application program.
In the middle of reality is used, when system has the data of transmission to send from certain UART of fastener, system sends the transmission data buffer of copying data to software systems (driving) with this, be among the MMIO of fastener, and send buffer zone by the contact manager data of telling this UART in the pci bus communication controler and have data to send, the contact manager of UART is that the conversion Calculation machine data flows to the RS232/RS485 communication transceiver for actual logic level (TTL) signal through the magnetic isolator, is that the electric signal that meets IEA232/IEA485 communication is transported to distant place equipment by this RS232/RS485 communication transceiver conversion logic level signal; The contact manager of UART sent by pci bus communication controler apprizing system data and finishes after transmission finished.
When distant place equipment has data to arrive certain UART, the RS232/RS485 communication transceiver is logic level (TTL) signal with the transform electric of IEA232/IEA485 communication, be transferred to the contact manager of UART through the magnetic isolator, the contact manager copies data is in the MMIO of fastener, and send a hardware interrupts, reporting system is taken data away; Software systems (driving) distinguish it is the data which UART receives by the zone bit of interruption status word, dispatch the Interrupt Process procedure function of this UART, promptly can give application program with receiving data transfer.
Adopted above-mentioned multi-serial port data communication card equipment based on cpci bus, owing to wherein adopted cpci bus communication interface mode, and be connected with system hardware and adopt 2mm high density pin type connector, thereby make system that operation is more reliable in industrial application; And CPCI has the hot plug function, can not need under the power cutoff situation, inserts or extracts the multi-serial port data communication card equipment that is moving and do not influence or destroy the operate as normal of system, thereby lay the foundation for high availability; The extensibility of CPCI allows a hardware system platform to expand 78 serial port boards at most under the situation that does not increase the PCI bridge, promptly can expand to reach 56 serial ports at most; Simultaneously, realized Based Intelligent Control RS485 communication in the utility model, and RS485 is a half duplex series communication, has automatic RS485 communication Flow Control function in the UART communication control module wherein, thereby simplified the RS232/RS485 commutation circuit greatly, also made the switching controls of RS232/RS485 really realize intellectuality; Because the iCoupler magnetic isolation technology (magnetic isolation module) that has wherein adopted has effectively avoided influencing in the photoelectrical coupler opto-electronic conversion link of efficient, thereby power consumption is very low, only, have the message transmission rate higher, time sequence precision and transient state common mode inhibition capacity than photoelectrical coupler for 1/10～1/50 of the multi-serial communication equipment that uses photoelectrical coupler; The serial communication message transmission rate can reach 230400bps, and is not only safe and reliable, and the scope of application is comparatively extensive.
In this instructions, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, instructions and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (6)
1. multi-serial port data communication card equipment based on cpci bus, it is characterized in that, described equipment comprises the cpci bus communication module, the magnetic isolation module, at least two UART communication management module with automatic RS485 communication Flow Control function, with the two-in-one transceiver communication module of the corresponding RS232/RS485 of described UART communication management module quantity, this cpci bus communication module is connected with host computer system by cpci bus, described each UART communication management module is connected with described cpci bus communication module respectively, the two-in-one transceiver communication module of described each RS232/RS485 all inserts the RS232/RS485 bus, and described each UART communication management module is connected with the two-in-one transceiver communication module of corresponding RS232/RS485 by described magnetic isolation module.
2. the multi-serial port data communication card equipment based on cpci bus according to claim 1 is characterized in that, described cpci bus communication module is a PCI slave unit manager.
3. the multi-serial port data communication card equipment based on cpci bus according to claim 1, it is characterized in that described UART communication management module with automatic RS485 communication Flow Control function is the UART contact manager with automatic RS485 communication Flow Control function.
4. the multi-serial port data communication card equipment based on cpci bus according to claim 1 is characterized in that, described magnetic isolation module is an iCoupler magnetic isolator.
5. the multi-serial port data communication card equipment based on cpci bus according to claim 1 is characterized in that, the two-in-one transceiver communication module of described RS232/RS485 is the two-in-one communication transceiver of RS232/RS485.
6. according to each described multi-serial port data communication card equipment in the claim 1 to 5 based on cpci bus, it is characterized in that, described quantity with UART communication management module of automatic RS485 communication Flow Control function is 8, and the quantity of the two-in-one transceiver communication module of described RS232/RS485 also is 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200700022U CN201503585U (en) | 2009-04-07 | 2009-04-07 | Multi-serial-port data communication card equipment based on CPCI bus |
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| CN2009200700022U CN201503585U (en) | 2009-04-07 | 2009-04-07 | Multi-serial-port data communication card equipment based on CPCI bus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176151A (en) * | 2011-02-25 | 2011-09-07 | 中国矿业大学(北京) | PC (personal computer)/104-Plus multifunctional data acquiring card |
| CN102760111A (en) * | 2012-06-27 | 2012-10-31 | 浙江大学 | FPGA-based (Field Programmable Gate Array) extended multi-serial port device and data receiving-transmitting method thereof |
| CN114157530A (en) * | 2021-12-02 | 2022-03-08 | 浙江海洋大学 | Intelligent monitoring and early warning system and method for unmanned ship |
-
2009
- 2009-04-07 CN CN2009200700022U patent/CN201503585U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176151A (en) * | 2011-02-25 | 2011-09-07 | 中国矿业大学(北京) | PC (personal computer)/104-Plus multifunctional data acquiring card |
| CN102176151B (en) * | 2011-02-25 | 2013-02-06 | 中国矿业大学(北京) | PC (personal computer)/104-Plus multifunctional data acquiring card |
| CN102760111A (en) * | 2012-06-27 | 2012-10-31 | 浙江大学 | FPGA-based (Field Programmable Gate Array) extended multi-serial port device and data receiving-transmitting method thereof |
| CN102760111B (en) * | 2012-06-27 | 2015-05-20 | 浙江大学 | FPGA-based (Field Programmable Gate Array) extended multi-serial port device and data receiving-transmitting method thereof |
| CN114157530A (en) * | 2021-12-02 | 2022-03-08 | 浙江海洋大学 | Intelligent monitoring and early warning system and method for unmanned ship |
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