CN104573773A - Smart card reading and writing method - Google Patents
Smart card reading and writing method Download PDFInfo
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- CN104573773A CN104573773A CN201510064772.6A CN201510064772A CN104573773A CN 104573773 A CN104573773 A CN 104573773A CN 201510064772 A CN201510064772 A CN 201510064772A CN 104573773 A CN104573773 A CN 104573773A
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Abstract
The invention provides a smart card reading and writing method. The smart card reading and writing method comprises the following steps: initializing an IC card reader and a receiving and sending module through an RS485 serial interface by an MCU, configuring a card reader operating mode, reading IC card information by the card reader, performing wireless transmission on the IC card information by the receiving and sending module, modulating digital signals by utilizing a modulator-demodulator which is in an amplitude modulation manner, regulating the transmission power of the signals by utilizing a power amplifier, regulating the receiving sensitivity of the signals by a band-pass filter and a low-noise amplifier so as to control an effective transmission distance of the information, and performing high-frequency switch conversion, so that a system operates in a transmission channel or a receiving channel. The smart card reading and writing method provided by the invention can be used for improving the reliability of communication, and achieving the real-time communication between key information and a mobile terminal.
Description
Technical field
The present invention relates to chip card technology, particularly a kind of IC-card reading/writing method.
Background technology
Along with computer technology development, computing machine and our daily life contact more and more closer, and with the process of computing machine communication exchange, non-contact IC card is generally used by people as a kind of quick, safe means.In current development networking technology process, as the major technique of identification terminal object, become the important component part of Internet of Things.The use of non-contact IC card widely using from the student status management of all-in-one campus card, student to public transport subway card etc. is ubiquitous.While IC-card obtains popularizing, more and more higher requirement is proposed to portability, ease for use and reliability etc. that IC-card is read and write, there is erection cable inconvenience in existing IC-card radio data-transmission equipment and method, cost is high, is difficult to the demand adapting to multiple occasion.
Therefore, for the problems referred to above existing in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
For solving the problem existing for above-mentioned prior art, the present invention proposes a kind of smart card reader method, comprising:
By RS485 serial line interface, initialization is carried out to IC-card card reader and transceiver module by MCU, reader operating mode is configured, and read IC card information by card reader, by described transceiver module, IC card information is carried out wireless transmission, described transceiver module is modulated digital signal by modulator-demodular unit, described modulator-demodular unit adopts amplitude modulation mode, use the emissive power of power amplifier adjustment signal, the receiving sensitivity of signal is adjusted by bandpass filter and low noise amplifier, and then the effective propagation path of control information, by the switching of HF switch to make system works at transmission channel or receiving cable.
Preferably, described transceiver module is semiduplex working method, is carried out the setting of mode of operation by RS485 serial line interface, receives data to be sent or the data received is transmitted, described transceiver module comprises FPGA (Field Programmable Gate Array), for the duty of control system; Described modulator-demodular unit adopts the mode of operation of time division duplex, complete the modulation and demodulation of data voluntarily, phase-locking type radiation is adopted by inner phaselocked loop, frame synchronization and the bit synchronization of data is completed voluntarily when receiving data, simultaneously demodulated output data and bit synchronization clock, use 11.0634MHz without source crystal as external crystal-controlled oscillation; Correspondingly change load capacitance according to the crystal oscillation frequency of actual measurement, normally work to make crystal oscillation chip when nominal frequency place; Described modulator-demodular unit adopts inner phase-locking type to complete modulation, add that external loop filter forms a complete phaselocked loop, adopt fraction division, according to modulating data 0 or 1 selects frequency shift (FS), then being added with the integral part of N to be formed by third order sigma-delta D modulator with the fraction part of N finally affect the Fractional-N frequency ratio that phaselocked loop exports and changes output frequency again, and realization is modulated.
Preferably, described MCU realizes the initial configuration to card reader and transceiver module, receive the data that card reader issues transceiver module, and according to certain baud rate, the data in IC-card are sent to transceiver module, the effective information that transceiver module filters out sends to the mobile phone users of far-end by radio-frequency module;
Wherein, card reader data must be transmitted with fixing baud rate; Transceiver module is controlled by MCU; By the initialization of the existing transceiver module of the universaling I/O port Serial Communication Simulation cause for gossip of MCU;
Described transceiver module completes and sends data and receive data, described transceiver module FPGA (Field Programmable Gate Array) is when receiving the mode of operation configuration order from MCU, by the parameter of command word representative, related hardware is configured, described mode of operation configuration order comprises transceiver mode, working frequency points, bit rate;
The process of described transmission data comprises: when receiving command word and needing to be configured to sending mode, FPGA (Field Programmable Gate Array) completes following operation:
(1) parameter of resolve command word representative, is converted into the configuration parameter of modulator-demodular unit and writes;
(2) parameter of resolve command word representative, is converted into the configuration parameter of local oscillator and writes;
(3) control signal sending frequency mixer makes it be operated in up-conversion pattern;
(4) control signal sending transceiver toggle switch makes it connect power amplifier and exports antenna to;
(5) open the power control switch of power amplifier, make it connect working power;
(6) receive from the RS485 serial line interface of MCU the data read out from IC-card, and formed the form of modem data frame requirement, be sent to modulator-demodular unit by setting code check and carry out modulation transmission.
The present invention compared to existing technology, has the following advantages:
The IC-card reading/writing method that the present invention proposes can improve the reliability of communication, and realizes the real-time Communication for Power between key message and mobile terminal.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the smart card reader method according to the embodiment of the present invention.
Embodiment
Detailed description to one or more embodiment of the present invention is hereafter provided together with the accompanying drawing of the diagram principle of the invention.Describe the present invention in conjunction with such embodiment, but the invention is not restricted to any embodiment.Scope of the present invention is only defined by the claims, and the present invention contain many substitute, amendment and equivalent.Set forth many details in the following description to provide thorough understanding of the present invention.These details are provided for exemplary purposes, and also can realize the present invention according to claims without some in these details or all details.
An aspect of of the present present invention provides a kind of IC-card reading/writing method, be connected with the IC-card card reader of standard by RS485 serial line interface by MCU, realize the configuration to reader operating mode and the radio read-write to IC-card internal information and transmission, also use radio-frequency module as communication link for subsequent use simultaneously, so both can improve the reliability of communication, the real-time Communication for Power between key message and standard mobile terminal can have been realized again.Fig. 1 is the method flow diagram according to the embodiment of the present invention.
MCU is connected with IC-card card reader, radio-frequency module and transceiver module respectively by RS485 serial communication interface.After system power-up, by MCU, initialization is carried out to system and each functional module thereof, analytical propagation agreement to add synchronizing information, the valid data etc. extracted in a frame, and carry out reception and the transmission of wireless data.
Wherein, transceiver module is semiduplex working method.Carried out the setting of mode of operation by RS485 serial line interface, receive data to be sent or the data received are transmitted.The FPGA (Field Programmable Gate Array) of transceiver module is used for the duty of control system and coordinates the course of work of each functional module, then by modulator-demodular unit, digital signal is modulated, make working platform at the carrier wave frequency range of regulation by up-conversion, by the emissive power of power amplifier adjustment signal, the receiving sensitivity of signal is adjusted by bandpass filter and low noise amplifier, and then the effective propagation path of control information, by the switching of HF switch to make system works at transmission channel or receiving cable.
In order to effectively reduce the complicacy of hardware design, improving the reliability of information transmission, the function opposite independent that unit module completes, being carried out the transmission of information each other by the communication interface of standard according to the communication protocol of making an appointment.
In the wireless transmission of IC card information, the selection of wireless channel modulation demodulation system and hardware design are one of topmost work.The feature of IC information transmission is low data rate, and bursty transmission is high to the reliability requirement of information transmission.The carrier-wave transmission of digital signal has many different modulation systems, considers the transmission feature of IC information, selects amplitude modulation mode as the modulation system of wireless channel.Modulator-demodular unit adopts the mode of operation of time division duplex, complete the modulation and demodulation of data voluntarily, by inner phaselocked loop, employing phase-locking type radiates, frame synchronization and the bit synchronization of data is completed voluntarily when receiving data, simultaneously demodulated output data and bit synchronization clock, use 11.0634MHz without source crystal as external crystal-controlled oscillation.Meanwhile, correspondingly change load capacitance according to the crystal oscillation frequency of actual measurement, can normally work to make crystal oscillation chip when nominal frequency place.
What modulator-demodular unit adopted is that inner phase-locking type completes modulation, add that an external loop filter can form a complete phaselocked loop, and the fraction division adopted, make output can obtain higher frequency resolution, also improve the precision of modulation simultaneously.The present invention selects frequency shift (FS) according to 0 of modulating data or 1, is then added with the fraction part of N the Fractional-N frequency ratio being formed and finally affect phaselocked loop and export again with the integral part of N by third order sigma-delta D modulator, changes output frequency, realize modulation.
In the debug phase, the parameter of modulator-demodular unit is set by the host computer Debugging interface of modulator-demodular unit, comprises chip transceiver mode, working frequency points, reference frequency, bit rate, frequency modulation, charge pump current, output power, auxiliary output, the output of crystal frequency division, frame alignment word, demodulation mode, baseband demodulation bandwidth etc.If chip configuration success, source current can raise to some extent, if be configured to sending mode, measure output signal frequency correctness, if be configured to receiving mode, measure the whether correct data sync clock of clock port and export, judge that whether normal chip operation is according to this.
Except modem circuit, also has the design of the circuit such as local oscillator circuit, mixer, power amplifier circuit, amplifier circuit in low noise, system is according to the design objective preset, integrated device suitable is successively as the core devices of above each circuit realiration corresponding function, due to indexs such as carrier frequency, information transmission distances along with the difference of equipment application scenario differs greatly, the dirigibility of these circuit design is also larger.
MCU realizes the initial configuration to card reader and transceiver module, receive the data that card reader issues transceiver module, and according to certain baud rate, the data in IC-card are sent to transceiver module, the effective information that transceiver module filters out sends to the mobile phone users of far-end by radio-frequency module.
Card reader data must be transmitted with fixing baud rate, are connected with MCU; Transceiver module is controlled by MCU; In addition, the initialization of transceiver module also needs a serial port, existing by the universaling I/O port Serial Communication Simulation cause for gossip of MCU.
Transceiver module both can send data can also receive data, FPGA (Field Programmable Gate Array) needs (to comprise transceiver mode receiving the mode of operation configuration order from MCU, working frequency points, bit rate) time, by the parameter of command word representative, related hardware is configured.
When receiving command word and needing to be configured to sending mode, FPGA (Field Programmable Gate Array) completes following operation:
(1) parameter of resolve command word representative, is converted into the configuration parameter of modulator-demodular unit and writes.
(2) parameter of resolve command word representative, is converted into the configuration parameter of local oscillator and writes, mainly frequency conversion.
(3) control signal sending frequency mixer makes it be operated in up-conversion pattern.
(4) control signal sending transceiver toggle switch makes it connect power amplifier and exports antenna to.
(5) open the power control switch of power amplifier, make it connect working power.
(6) receive from the RS485 serial line interface of MCU the data read out from IC-card, and formed the form of modem data frame requirement, be sent to modulator-demodular unit by setting code check and carry out modulation transmission.
When receiving command word and needing to be configured to receiving mode, FPGA (Field Programmable Gate Array) completes following operation:
(1) parameter of resolve command word representative, is converted into the configuration parameter of modulator-demodular unit and writes.
(2) parameter of resolve command word representative, is converted into the configuration parameter of local oscillator and writes, and mainly does frequency conversion.
(3) control signal sending frequency mixer makes it be operated in down coversion pattern.
(4) send the control signal of transceiver toggle switch to make it connect aerial signal to input to low noise.
(5) power control switch of switch-off power amplifier, makes it turn off working power.
(6) from modem data demodulation output port, receiving demodulation data also form serial transmission format (1 start bit, 8 bit data positions, 1 position of rest) and are dealt into data receiver by predefined host computer serial ports code check and show.
In sum, the present invention proposes a kind of smart card reader method, the reliability of communication can be improved, and realize the real-time Communication for Power between key message and mobile terminal.
Obviously, it should be appreciated by those skilled in the art, above-mentioned of the present invention each module or each step can realize with general computing system, they can concentrate on single computing system, or be distributed on network that multiple computing system forms, alternatively, they can realize with the executable program code of computing system, thus, they can be stored and be performed by computing system within the storage system.Like this, the present invention is not restricted to any specific hardware and software combination.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (3)
1. a smart card reader method, is characterized in that, comprising:
By RS485 serial line interface, initialization is carried out to IC-card card reader and transceiver module by MCU, reader operating mode is configured, and read IC card information by card reader, by described transceiver module, IC card information is carried out wireless transmission, described transceiver module is modulated digital signal by modulator-demodular unit, described modulator-demodular unit adopts amplitude modulation mode, use the emissive power of power amplifier adjustment signal, the receiving sensitivity of signal is adjusted by bandpass filter and low noise amplifier, and then the effective propagation path of control information, by the switching of HF switch to make system works at transmission channel or receiving cable.
2. method according to claim 1, it is characterized in that, described transceiver module is semiduplex working method, the setting of mode of operation is carried out by RS485 serial line interface, receive data to be sent or the data received are transmitted, described transceiver module comprises FPGA (Field Programmable Gate Array), for the duty of control system; Described modulator-demodular unit adopts the mode of operation of time division duplex, complete the modulation and demodulation of data voluntarily, phase-locking type radiation is adopted by inner phaselocked loop, frame synchronization and the bit synchronization of data is completed voluntarily when receiving data, simultaneously demodulated output data and bit synchronization clock, use 11.0634MHz without source crystal as external crystal-controlled oscillation; Correspondingly change load capacitance according to the crystal oscillation frequency of actual measurement, normally work to make crystal oscillation chip when nominal frequency place; Described modulator-demodular unit adopts inner phase-locking type to complete modulation, add that external loop filter forms a complete phaselocked loop, adopt fraction division, according to modulating data 0 or 1 selects frequency shift (FS), then being added with the integral part of N to be formed by third order sigma-delta D modulator with the fraction part of N finally affect the Fractional-N frequency ratio that phaselocked loop exports and changes output frequency again, and realization is modulated.
3. method according to claim 2, it is characterized in that, described MCU realizes the initial configuration to card reader and transceiver module, receive the data that card reader issues transceiver module, and according to certain baud rate, the data in IC-card are sent to transceiver module, the effective information that transceiver module filters out sends to the mobile phone users of far-end by radio-frequency module;
Wherein, card reader data must be transmitted with fixing baud rate; Transceiver module is controlled by MCU; By the initialization of the existing transceiver module of the universaling I/O port Serial Communication Simulation cause for gossip of MCU;
Described transceiver module completes and sends data and receive data, described transceiver module FPGA (Field Programmable Gate Array) is when receiving the mode of operation configuration order from MCU, by the parameter of command word representative, related hardware is configured, described mode of operation configuration order comprises transceiver mode, working frequency points, bit rate;
The process of described transmission data comprises: when receiving command word and needing to be configured to sending mode, FPGA (Field Programmable Gate Array) completes following operation:
(1) parameter of resolve command word representative, is converted into the configuration parameter of modulator-demodular unit and writes;
(2) parameter of resolve command word representative, is converted into the configuration parameter of local oscillator and writes;
(3) control signal sending frequency mixer makes it be operated in up-conversion pattern;
(4) control signal sending transceiver toggle switch makes it connect power amplifier and exports antenna to;
(5) open the power control switch of power amplifier, make it connect working power;
(6) receive from the RS485 serial line interface of MCU the data read out from IC-card, and formed the form of modem data frame requirement, be sent to modulator-demodular unit by setting code check and carry out modulation transmission.
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| CN201510064772.6A CN104573773B (en) | 2015-02-09 | 2015-02-09 | A kind of smart card reader method |
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| CN201510064772.6A CN104573773B (en) | 2015-02-09 | 2015-02-09 | A kind of smart card reader method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106355118A (en) * | 2016-08-31 | 2017-01-25 | 新智数字科技有限公司 | IC card reader |
| CN110200608A (en) * | 2019-05-31 | 2019-09-06 | 苏州华士无线科技有限公司 | A kind of underwater sign sensing wireless transceiver system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303736A (en) * | 2007-05-08 | 2008-11-12 | 深圳市配天网络技术有限公司 | Multi-protocol ultrahigh frequency reader-writer |
| US20100253482A1 (en) * | 2009-04-06 | 2010-10-07 | Onsom, S.L. | Automatic payment system for the urban parking phases of vehicles using radio frequency (rfid) |
-
2015
- 2015-02-09 CN CN201510064772.6A patent/CN104573773B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303736A (en) * | 2007-05-08 | 2008-11-12 | 深圳市配天网络技术有限公司 | Multi-protocol ultrahigh frequency reader-writer |
| US20100253482A1 (en) * | 2009-04-06 | 2010-10-07 | Onsom, S.L. | Automatic payment system for the urban parking phases of vehicles using radio frequency (rfid) |
Non-Patent Citations (1)
| Title |
|---|
| 王英: "UHF频段RFID读写器研究与实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106355118A (en) * | 2016-08-31 | 2017-01-25 | 新智数字科技有限公司 | IC card reader |
| CN110200608A (en) * | 2019-05-31 | 2019-09-06 | 苏州华士无线科技有限公司 | A kind of underwater sign sensing wireless transceiver system |
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| CN104573773B (en) | 2017-09-29 |
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Effective date of registration: 20191202 Address after: 233010 No.2, third floor, No.319, zhanggongshan Road, zhanggongshan street, Yuhui District, Bengbu City, Anhui Province Patentee after: Bengbu aochuang Intellectual Property Operation Co., Ltd Address before: West high tech Zone Fucheng Road in Chengdu city of Sichuan province 610041 399 No. 7 Building 1 unit 14 floor No. 1407 Patentee before: SICHUAN LIANGXUN TECHNOLOGY CO., LTD. |
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Effective date of registration: 20201104 Address after: Zhangzhuang village, dinglichang Town, yuncheng county, Heze City, Shandong Province Patentee after: Yuncheng Anxin Natural Gas Co., Ltd Address before: 233010 No.2, third floor, No.319, zhanggongshan Road, zhanggongshan street, Yuhui District, Bengbu City, Anhui Province Patentee before: Bengbu aochuang Intellectual Property Operation Co.,Ltd. |