CN103634814A - Wireless probe circuit device, wireless probe equipment and wireless datagram processing method - Google Patents
Wireless probe circuit device, wireless probe equipment and wireless datagram processing method Download PDFInfo
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- CN103634814A CN103634814A CN201210330566.1A CN201210330566A CN103634814A CN 103634814 A CN103634814 A CN 103634814A CN 201210330566 A CN201210330566 A CN 201210330566A CN 103634814 A CN103634814 A CN 103634814A
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Abstract
The invention discloses a wireless probe circuit device which comprises a general 2.4GHz radiofrequency (RF) communication baseband signal demodulation module and a baseband circuit module. The general 2.4GHz RF communication baseband signal demodulation module is used for generating baseband digital signals via demodulation; and the baseband circuit module is used for processing the baseband digital signals, and the baseband circuit module comprises an FPGA and an MCU, wherein the FPGA detects sampling sequences obtained by sampling the baseband digital signals at a high speed, and when a start-bit sequence is detected, a wireless datagram is analyzed and stored in an FIFO memory realized by the FPGA; and the MCU is used for reading and verifying the analyzed wireless datagram in the FIFO memory, and then carries out other processing. The invention also discloses a wireless datagram processing method. According to the invention, the wireless datagram of NORDIC 2.4GHz short-distance radio communication protocols and Bluetooth radio communication protocols can be adaptively detected and received, the speed of detection and reception processing is high, resource consumption of hardware and software is low, and the device, equipment and method can be applied to safety detection and estimation for industrial short-distance radio communication instruments and other short-distance radio communication fields.
Description
Technical field
The present invention relates to radioelectronics field, technical field of the computer network and computer network security field, relate in particular to wireless probe circuit arrangement, equipment and the corresponding wireless data report processing method of the multiple 2.4GHz short range wireless communication protocol of a kind of self adaptation.
Background technology
The 2.4GHz short-distance wireless communication family chip that NORDIC semiconductor (NORDIC Semiconductor) is released, comprise that the chips such as nRF2401A, nRF24L01, nRF24L01+ are widely used in 2.4GHz ISM band short-distance wireless communication, chip internal hardware integration data link layer protocol, simple with MCU interface, software development is easy, and in the industrial short-distance wireless communication instrument such as wireless senser, application is very extensive.But the communication protocol of this family chip only contains data link layer, directly do not support encrypted wireless communication, if design and develop industrial short-distance wireless communication instrument based on this family chip, on software, do not use again coded communication means, can bring very large fail safe hidden danger.
In order to assess the fail safe of developing industrial short-distance wireless communication instrument based on NORDIC semiconductor 2.4GHz short-distance wireless communication family chip, need to design a kind of wireless probe to intercept and capture on-air radio datagram, and analyze.NORDIC semiconductor 2.4GHz short-distance wireless communication family chip is supported multiple short-distance wireless communication (data link layer) agreement, comprise the agreements such as ShockBurstTM, Enhanced ShockBurstTM, support 250kbps, 1Mbps and 2Mbps several data transmission rate, can also use a plurality of 2.4GHz ISM band frequencies, therefore the necessary multiple 2.4GHz short range wireless communication protocol of self adaptation of the wireless probe of design, comprises several data transmission rate and a plurality of frequency.
Summary of the invention
For above-mentioned technical problem, the present invention proposes a kind of wireless probe circuit arrangement, based on general 2.4GHz radio communication modulation demodulation module, FPGA and MCU, realize, can receive the wireless data report of the multiple 2.4GHz short range wireless communication protocols such as the variety of protocol of NORDIC 2.4GHz short-distance wireless communication chip series, bluetooth, demodulation, sampling, buffering, protocol identification and datagram resolve, automatic detection frequency, self adaptation various protocols and wireless data transmission rate.
Described device comprises: the baseband circuit that general 2.4GHz radio communication modulation demodulation module, FPGA and MCU form.
The invention allows for a kind of method of processing the wireless data report of multiple 2.4GHz short range wireless communication protocol, comprising:
The GFSK modulation signal of NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement demodulates baseband digital signal by general 2.4GHz radio communication modulation demodulation module;
Described baseband digital signal is delivered to the baseband circuit of FPGA and MCU composition;
FPGA carries out to described baseband digital signal the sample sequence that high-speed sampling obtains and carries out Sequence Detection, if detected, in sample sequence, there is the start bit of wireless datagram sequence, resolve described wireless data report and described datagram be saved in the FIFO memory of FPGA realization;
The FIFO memory that MCU realizes from described FPGA, read the wireless data report after parsing and verify, then carrying out other processing.
Technical scheme of the present invention can realize the wireless probe of the multiple 2.4GHz short range wireless communication protocol of self adaptation, the wireless data report that can self-adaptive detection receives NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement, survey reception & disposal speed high, hardware and software resource consumption is little, can be used for safety detection and the assessment in industrial short-distance wireless communication instrument and other application short-distance wireless communication field.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is wireless probe circuit arrangement schematic diagram of the present invention;
Fig. 2 is the method flow diagram that the present invention processes wireless data report.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the embodiment of the present invention, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, technical scheme in the present invention is described in further detail.
As shown in Figure 1, be the wireless probe circuit arrangement schematic diagram of the multiple 2.4GHz short range wireless communication protocol of self adaptation of the present invention, described device comprises:
The baseband circuit module 102 that general 2.4GHz radio communication modulation demodulation module 101, FPGA1021 and MCU1022 form;
Based on general 2.4GHz radio communication modulation demodulation module 101, FPGA1021 and MCU1022, realize, can receive the wireless data report of the multiple 2.4GHz short range wireless communication protocols such as the variety of protocol of NORDIC 2.4GHz short-distance wireless communication chip series, bluetooth, demodulation, sampling, buffering, protocol identification and datagram resolve, automatic detection frequency, self adaptation various protocols and wireless data transmission rate.
The general 2.4GHz radio communication modulation demodulation module 101 GFSK modulation signals for demodulation NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement, support frequency to survey.The radio frequency of this module and intermediate-frequency channel are partly selected down-conversion scheme of superhet, frequency discriminator is selected phase shift product frequency discriminator, mainly by LNA, band pass filter, frequency mixer, PLL, frequency multiplier, intermediate frequency amplifier, amplitude limiter, frequency discriminator etc., partly formed, select matured product also can.
NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement are all used GFSK(Gaussian Frequency Shift Keying) mode modulating baseband signal, message transmission rate has 250kbps, 1Mbps, 2Mbps etc. multiple.Modulation demodulation module 101 can be general, but can only demodulate baseband digital signal, and the protocol identification of baseband digital signal, message transmission rate identification etc. need to be realized by specialised hardware, realizes here by FPGA1021.
Baseband digital signal is delivered to baseband circuit module 102 after demodulation, FPGA1021 carries out high-speed sampling (the above sampling rate of 4MS/s) to digital signal, and by FPGA1021, realize trigger and detect the initial edge of digital signal, the initial time that guarantees to sample is synchronizeed with the initial edge of baseband digital signal; FPGA1021 carries out Sequence Detection to sample sequence, automatically detects the start bit sequence of different agreement and different pieces of information transmission rate wireless data report; Once start bit sequence be detected, i.e. resolution data report datagram is saved in the FIFO memory that FPGA1021 realizes.
In fact FPGA1021 has played the effect of specialized protocol logic analysis, comprise that transmission rate detects and different agreement wireless data report start bit Sequence Detection, FPGA must not be lower than 4MS/s, to adapt to the detection of 2Mbps message transmission rate to the sampling rate of baseband digital signal.
The fifo buffer that MCU1022 realizes from FPGA1021, read the wireless data report parsing, going forward side by side for example advances, after a step is demonstrate,proved (verifying CRC) confirms to survey the wireless data report receiving, by MCU, further processed, for example, show, store or continue to be transferred to host computer.
FPGA1021 detection protocol wireless data report start bit sequence, start bit sequence being detected is resolution data report preservation, the further checking of wireless data report, for example verify CRC, by MCU1022, by software, further completed, the advantage of performance MCU1022 software and FPGA1021 combination of hardware, has the advantages such as speed Gao, hardware and software resource consumption is little.
Shown in Fig. 2, for the present invention processes the method flow diagram of the wireless data report of multiple 2.4GHz short range wireless communication protocol, be applicable to the wireless probe circuit arrangement of the multiple 2.4GHz short range wireless communication protocol of self adaptation of the present invention, comprise:
The GFSK modulation signal of S101, NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement demodulates baseband digital signal by general 2.4GHz radio communication modulation demodulation module 101;
S102, FPGA1021 carry out to described baseband digital signal the sample sequence that high-speed sampling obtains and carry out Sequence Detection, if detected, in sample sequence, there is the start bit of wireless datagram sequence, resolve described wireless data report and described datagram be saved in the FIFO memory of FPGA1021 realization;
The FIFO memory that S103, MCU1022 realize from described FPGA1021, read the wireless data report after parsing and verify, then carrying out other processing.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realizes.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in some part of each embodiment of the present invention or embodiment.
Method and apparatus embodiment in this specification is interrelated, and both implementation methods are substantially similar, so method description is fairly simple, relevant part is referring to the part explanation of device embodiment.
Although described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not depart from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not depart from spirit of the present invention.
Claims (11)
1. a wireless probe circuit arrangement, is characterized in that, comprising: the baseband circuit module that general 2.4GHz radio communication modulation demodulation module, FPGA and MCU form;
Described general 2.4GHz radio communication modulation demodulation module is used for demodulating baseband digital signal;
Described baseband circuit module is for processing described baseband digital signal, wherein, described FPGA carries out Sequence Detection for described baseband digital signal being carried out to the sample sequence that high-speed sampling obtains, if detected, in sample sequence, there is the start bit of wireless datagram sequence, resolve described wireless data report and described datagram be saved in the FIFO memory of FPGA realization; Described MCU reads the wireless data report parsing and verifies for the FIFO memory of realizing from described FPGA, then carries out other processing.
2. device as claimed in claim 1, is characterized in that: described general 2.4GHz radio communication modulation demodulation module is specifically for the GFSK modulation signal of demodulation NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement.
3. device as claimed in claim 1, is characterized in that: the radio frequency of described general 2.4GHz radio communication modulation demodulation module and intermediate-frequency channel partly adopt down-conversion scheme of superhet, and frequency discriminator is phase shift product frequency discriminator.
4. device as claimed in claim 1, is characterized in that, when described FPGA carries out high-speed sampling to described baseband digital signal, from the initial edge of described digital signal, detects and obtains sample sequence.
5. device as claimed in claim 1, is characterized in that, reads the CRC that is verified as carrying out after the wireless data report after parsing and verify the FIFO memory that described MCU realizes from described FPGA.
6. device as claimed in claim 1, is characterized in that, it is characterized in that, described other processing that wireless data report after checking is carried out comprise demonstration, store or continue being transferred to host computer.
7. a wireless probe equipment, is characterized in that, comprises any wireless probe circuit arrangement as described in claim 1 to 6.
8. a method of processing wireless data report, is characterized in that, is applicable to device claimed in claim 1, and described method comprises:
The GFSK modulation signal of NORDIC 2.4GHz short range wireless communication protocol and Bluetooth wireless communication agreement demodulates baseband digital signal by general 2.4GHz radio communication modulation demodulation module;
Described baseband digital signal is delivered to the baseband circuit module of FPGA and MCU composition;
FPGA carries out to described baseband digital signal the sample sequence that high-speed sampling obtains and carries out Sequence Detection, if detected, in sample sequence, there is the start bit of wireless datagram sequence, resolve described wireless data report and described datagram be saved in the FIFO memory of FPGA realization;
The FIFO memory that MCU realizes from described FPGA, read the wireless data report after parsing and verify, then carrying out other processing.
9. method as claimed in claim 8, is characterized in that, when described FPGA carries out high-speed sampling to described baseband digital signal, from the initial edge of described digital signal, detects and obtains sample sequence.
10. method as claimed in claim 8, is characterized in that, reads the CRC that is verified as carrying out after the wireless data report after parsing and verify the FIFO memory that described MCU realizes from described FPGA.
11. methods as claimed in claim 8, is characterized in that, the FIFO memory that described MCU realizes from described FPGA, read the wireless data report after parsing and verify, then carry out other processing and comprise demonstration, store or continue being transferred to host computer.
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Cited By (3)
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| CN110336711A (en) * | 2019-06-13 | 2019-10-15 | 苏州中科集成电路设计中心有限公司 | A kind of the check and evaluation method and its realization device of carrier communication signal quality |
| CN112835842A (en) * | 2021-03-05 | 2021-05-25 | 深圳市汇顶科技股份有限公司 | Terminal sequence processing method, circuit, chip and electronic terminal |
| CN112835842B (en) * | 2021-03-05 | 2024-04-30 | 深圳市汇顶科技股份有限公司 | Terminal sequence processing method, circuit, chip and electronic terminal |
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| CN101980493A (en) * | 2010-10-27 | 2011-02-23 | 清华大学 | Method for realizing 2.4GHz digital baseband signal demodulation of wireless sensor network |
| CN202019367U (en) * | 2011-05-05 | 2011-10-26 | 北京泛在电子标签技术有限公司 | System realizing wireless communication in complex and narrow electromagnetic environment |
| US20120027132A1 (en) * | 2010-07-30 | 2012-02-02 | Sensus Usa Inc. | Gfsk receiver architecture and methodology |
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| US20120027132A1 (en) * | 2010-07-30 | 2012-02-02 | Sensus Usa Inc. | Gfsk receiver architecture and methodology |
| CN101980493A (en) * | 2010-10-27 | 2011-02-23 | 清华大学 | Method for realizing 2.4GHz digital baseband signal demodulation of wireless sensor network |
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| CN112835842B (en) * | 2021-03-05 | 2024-04-30 | 深圳市汇顶科技股份有限公司 | Terminal sequence processing method, circuit, chip and electronic terminal |
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Application publication date: 20140312 |