CN108319200B - Portable internet logic analyzer - Google Patents
Portable internet logic analyzer Download PDFInfo
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- CN108319200B CN108319200B CN201810166185.1A CN201810166185A CN108319200B CN 108319200 B CN108319200 B CN 108319200B CN 201810166185 A CN201810166185 A CN 201810166185A CN 108319200 B CN108319200 B CN 108319200B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Abstract
The invention discloses a portable internet logic analyzer, which comprises a logic data analyzer, an embedded system board, a data acquisition circuit, a clock trigger circuit and an LCD touch display screen, wherein the data acquisition circuit and the clock trigger circuit are connected with the logic data analyzer, the logic data analyzer is connected with the embedded system board through peripheral I/O, the LCD touch display screen is connected to an MIPI DSI external port arranged on the embedded system board, an embedded system arranged in the embedded system board is connected with a local area network through an Ethernet interface arranged on the embedded system board, or the embedded system is connected and communicated with an external PC through a WIFI module and a mobile network module. Through the mode, the invention provides the portable internet logic analyzer which has the advantages of supporting remote display based on the internet, multi-user cooperation, system online upgrading and the like.
Description
Technical Field
The invention relates to the field of portable internet logic analyzers, in particular to a logic data analyzer supporting internet remote data transmission, display and multi-user cooperation and supporting system online upgrade and a sequential data analyzer of an embedded system supporting an internet digital logic circuit.
Background
An Embedded system (Embedded system) is a "special purpose computer system designed for a specific application, completely Embedded inside a controlled device". The computer system is a special computer system which takes application as a center and takes computer technology as a basis, and the software and hardware can be cut, thereby being suitable for strict requirements of application systems on functions, reliability, cost, volume, power consumption and the like. The system kernel is very small, the specificity is strong, the combination of the software system and the hardware is very tight, the system transplantation is generally carried out aiming at the hardware, and even in products of the same brand and the same series, the system kernel needs to be continuously modified according to the change and increase and decrease of the system hardware. Meanwhile, the system is often greatly changed aiming at different tasks. In addition, the running speed is very fast, and real-time signals can be processed.
A logic analyzer: a logic analyzer is an instrument that analyzes the logical relationship of a digital system. The logic analyzer is a bus analyzer belonging to data field test instrument, i.e. an instrument based on bus concept and simultaneously observing and testing data flow on multiple data lines, and the instrument is very effective for testing and analyzing complex digital systems. The logic analyzer is an instrument for acquiring and displaying digital signals from test equipment by using a clock, and is mainly used for timing judgment. The logic analyzer is used for displaying the running condition of the digital system in a form convenient to observe, and analyzing and judging faults of the digital system.
The main characteristics are as follows: there are enough input channels; the method has multiple flexible triggering modes, and ensures accurate positioning of the observed data stream (for software, any program segment in the operation of the system can be tracked, and for hardware, glitch interference existing in the system can be detected and displayed). Has memory function, can observe single and non-periodic data information, and can diagnose random fault. Has delay capability for analyzing the cause of the fault. The method has a limiting function, realizes selection of data to be acquired, and deletes irrelevant data. The display method has various display modes, and can display programs by using characters, mnemonics and assembly language, display data by using binary, octal, decimal, hexadecimal and the like, and display the time sequence relation between information by using a timing chart. The method has the capability of driving a time domain instrument so as to reproduce the real waveform of the signal to be detected and facilitate fault positioning. Has reliable burr detection capability.
There are two main types of logic analyzers currently on the market:
a high-end desk type instrument represented by Keysight (Germany technology) and Tektronix (Tak) has strong functions, the number of channels can reach hundreds, the sampling frequency can reach 25GHz, the clock can reach 800MHz, the price of the product is very expensive, and a general field engineer does not always need a logic analyzer with high performance and high price.
The other is a virtual logic analyzer using a data acquisition card based on a PC, and the performance of the product can meet the requirements of common engineers, so that the cost performance is higher. However, such analyzers must be PC based, and their performance is limited by PC architecture and clock performance and not system tailorable.
The main disadvantages of the two solutions described above are:
1. the portable property is not enough, the volume is relatively large, and the external power supply is needed.
2. In application, the test data can only be stored in the machine, and the test result needs to be accessed through an interface or a storage medium.
3. The system has the characteristics of real-time data sharing of the Internet and remote operation.
With the rapid development of integrated circuits and the wide application of electronic devices, logic analyzers are increasingly used in a wide range of applications, and have a large development space in industry, commerce, civilian use, education, and even military use. Therefore, the portable logic analyzer is convenient to carry, has functions meeting daily requirements, and has wide market space through research and development of the logic analyzer cooperatively shared through the Internet.
Disclosure of Invention
The invention mainly solves the technical problem of providing a portable internet logic analyzer, which combines the high-speed parallel data processing capability of the logic data analyzer and the strong real-time data processing capability of an embedded processor, and the two parts work cooperatively to complete the function of the logic analyzer, so that the logic analyzer supports the advantages of remote display based on the internet, multi-user cooperation, online upgrade of a system and the like.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a portable internet logic analyzer, includes logic data analyzer, embedded system board, data acquisition circuit, clock trigger circuit, LCD touch display screen, data acquisition circuit, clock trigger circuit all link to each other with logic data analyzer, logic data analyzer links to each other with embedded system board through peripheral I/O, LCD touch display screen is connected to the MIPI DSI external port of setting on the embedded system board, installs embedded system in the embedded system board is by setting up Ethernet interface on the embedded system board is by linking to each other with local area network, or realizes communicating with external PC through WIFI module and mobile network module connection. The embedded system board is in man-machine interaction with a user through the touch screen and is connected with a local area network or an internet user through a network interface.
In a preferred embodiment of the present invention, the data acquisition circuit is comprised of a high speed voltage comparator that compares the voltage of the input signal to a threshold voltage, set by the user through a logic data analyzer, ranging from TTL levels to CMOS, ECL and user-defined thresholds, to make decisions regarding the logic state 1 or 0 of the signal. The data acquisition circuit is a level conversion circuit realized based on a high-speed voltage comparator. Inputting a logic data analyzer with a high level when a voltage of an external signal is higher than a reference voltage considered as a logic high by setting a reference voltage of a comparator by a user; below this reference voltage is considered a logic low and is input to the logic data analyzer at a low level. The logic data analyzer collects 32 paths of signals output by the comparator into the data storage part at the same time and performs trigger analysis.
In a preferred embodiment of the present invention, the clock trigger circuit is composed of a low impedance probe and a filter circuit, and is used for introducing an external clock, performing glitch filtering and voltage variation on a clock signal, and enabling the input external clock to be processed into a clean clock which meets the requirements of a logic data analyzer.
In a preferred embodiment of the present invention, the logic data analyzer is provided with a high-performance low-power consumption FPGA programmable chip, and the FPGA programmable chip includes two large-capacity SRAM memory chips, which are respectively used for data temporary storage and FPGA configuration and function extension, and a JTAG interface.
In a preferred embodiment of the present invention, the embedded system board is provided with an MIPIDSI display interface, a 100mbps ethernet network interface, a standard wifi module, and a mobile network module, and the embedded system board is loaded with a tailorable open source Linux operating system.
The invention has the beneficial effects that: the portable internet logic analyzer provided by the invention combines the high-speed parallel data processing capability of the logic data analyzer and the strong real-time data processing capability of the embedded processor, and the two parts work together to complete the function of the logic analyzer, so that the logic analyzer supports the advantages of internet-based remote display, multi-user cooperation, system online upgrade and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a block diagram of a preferred embodiment of a portable Internet logic analyzer of the present invention;
fig. 2 is a block diagram of a preferred embodiment of a portable internet logic analyzer in accordance with the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-2, an embodiment of the present invention includes:
a portable Internet logic analyzer comprises a logic data analyzer, an embedded system board, a data acquisition circuit, a clock trigger circuit and an LCD touch display screen, wherein the data acquisition circuit and the clock trigger circuit are connected with the logic data analyzer, the logic data analyzer is connected with the embedded system board through peripheral I/O, the LCD touch display screen is connected to an MIPI DSI external port arranged on the embedded system board, an embedded system arranged in the embedded system board is connected with a local area network through an Ethernet interface arranged on the embedded system board, or is connected with an external PC through a WIFI module and a mobile network module for communication.
Through the mode, the embedded system can be connected with a local area network through the Ethernet interface on the system board or can be communicated with a remote controller through the WIFI module and the mobile network module, and test control and data collection can be performed through a web page or a mobile phone APP.
The data acquisition circuit is composed of a high-speed voltage comparator, the adopted high-speed voltage comparator has the advantages of eliminating common emission and fully adopting differential amplification; the method has the advantages that the characteristics of bandwidth, gain and power consumption are integrated, various acquired digital logic signals are converted into digital levels acceptable in a logic data analyzer, the voltage of an input signal is compared with a threshold voltage, a decision related to a signal logic state 1 or 0 is made, and a threshold voltage value is set by a user through the logic data analyzer and ranges from a TTL level to a CMOS, an ECL and a user-defined threshold.
Furthermore, the clock trigger circuit is composed of a low-impedance probe and a filter circuit and is used for introducing an external clock, filtering burrs of a clock signal and changing voltage, and because the data analyzer can only identify digital levels, the corresponding '1' has the lowest voltage requirement, and the corresponding '0' has the highest voltage requirement, the input external clock is processed into a clean clock which meets the requirements of the logic data analyzer. By the mode, the switching of two different modes triggered by the internal clock and the external clock of the logic analyzer is realized, the standard signal input is provided, and the calibration of the logic analyzer is facilitated.
Furthermore, the logic data analyzer is provided with a high-performance low-power consumption FPGA programmable chip for completing the trigger analysis of the acquired signals in different modes and storing the processed signals into the logic data analyzer. The FPGA programmable chip comprises two large-capacity SRAM memory chips which are respectively used for data temporary storage and FPGA configuration and function expansion, and a JTAG interface.
The logic data analyzer adopts a high-performance FPGA chip which is a low-power chip and is more suitable for portable equipment. Meanwhile, the interior of the logic data analyzer is mainly divided into four parts:
the data storage part is mainly responsible for caching signals input by the comparator to the logic data analyzer so as to facilitate trigger analysis;
a trigger analysis part for analyzing the signal data input by the data comparator according to the trigger configuration information to screen out the signal data to be stored;
a trigger configuration part for receiving design information from a user to complete the working mode configuration of the logic analyzer;
and fourthly, a system burning part for upgrading the function of the logic analyzer realized by the logic data analyzer.
Furthermore, the embedded system board is provided with an MIPIDSI display interface, a 100Mbps Ethernet network interface, a standard wifi module and a mobile network module, and the embedded system board is provided with a tailorable open source Linux operating system. The embedded system board mainly completes reading of bottom hardware data and analysis of protocols through a linux operating system. The human-computer interaction unit is used for interacting with a user in real time, and the transmission and the reception of network data are completed through a network interface and a network driver.
At last, the IP information of the WIFI module can be returned, in this time, the WIFI module is equivalent to an AP, if equipment is connected with the router, the information is sent to the IP port of the router, and the WIFI module can receive the information received by the information WIFI module and can utilize the serial port to send data to a web page or a mobile phone APP for test control and data collection. With one point, transmission of data is achieved.
The Linux system can implement control on a human-computer interaction interface, such as:
1. parameters of the logic analyzer, such as threshold voltage, are set through the human-machine interface.
2. Generating an analysis circuit according to the parameters of the logic analyzer, compiling the analysis circuit together with the module to be tested and downloading the analysis circuit;
3. the human-computer interface module controls all instruction registers of the action and triggers mode selection and configuration;
the logic analyzer stores and analyzes the sampling signal, and multi-user multithreading simultaneous working is realized through the wifi module
The embedded system is used as a master end, and the FPGA component is used as a slave end. The logic data analyzer is connected with the embedded system through a system bus and is mainly used for transmitting configuration information of different trigger modes,
the selection of the trigger mode can greatly influence the subsequent signal sampling; from the triggering time, an event is defined by front triggering, middle triggering and rear triggering, then the logic analyzer stores the signal change condition in a period of time before and after the event, and determines which triggering mode is adopted according to the signal; there may also be edge triggers, level triggers and protocol triggers, corresponding protocol triggers being provided according to some I2C, decoding of the SPI protocol, provided by the logic analyzer.
Configuration information for the logic data analyzer system is then provided, along with the signal data stream processed by the logic data analyzer. The embedded system mainly completes: protocol analysis of signal data, signal display control, man-machine interaction, burning and upgrading of a programmable system of a logic data analyzer, and external network communication.
And the external touch display screen completes signal display, setting information input and man-machine interaction.
The working process of the portable internet logic analyzer is as follows:
the user can generate the configuration information of logic analysis such as the number of trigger channels, the trigger position, the trigger mode and the like through a network interface or a touch screen. The configuration information is transmitted into the internal trigger configuration unit of the logic data analyzer from the trigger management unit of the embedded system through the bus, and the configuration unit completes the configuration of the data acquisition part of the logic analyzer. The external signal is changed into signal data which can be identified by the logic data analyzer through the data acquisition part, and the signal data is input into the data storage part and passes through the trigger analysis part, and when the trigger analysis part finds that the signal meets the trigger condition, the data storage part is controlled to store effective data. And the logic data analyzer caches the stored valid data by the SRAM and then sends the cached valid data to the embedded system. And the embedded system outputs the protocol through the touch display screen or transmits the protocol to other users through a network interface after completing corresponding protocol analysis.
The portable internet logic analyzer also completes the online upgrading process of the system as follows:
and the user stores the debugged system configuration file which meets the burning requirement of the logic data analyzer into the hardware upgrading part of the logic data analyzer of the embedded system through a network interface on the PC. The embedded system is used as a main end to complete the system burning process of the logic data analyzer through the bus, and the logic analyzer is upgraded on line.
In short, the portable internet logic analyzer has strong internet connection and sharing capability. Mainly solves five technical problems: the circuit bus test data acquisition module and the data processing module; the system comprises an instrument operation and data display module, an internet data transmission module, a system remote control module and hardware function online upgrading.
The invention achieves the following beneficial effects: the sampling speed of the logic analyzer is greatly improved by utilizing the characteristic that the logic data analyzer can work in parallel. The functions with higher requirements on data real-time performance, such as display, communication with a PC and analysis of a serial protocol, are completed by utilizing the strong real-time processing capacity of the embedded system. The system greatly reduces the design cost, saves resources, has good portability, and supports equipment sharing and multi-user cooperation. The field programmable technology of the logic data analyzer and the real-time debugging function of the embedded development board enable the enhancement of the system hardware function and the upgrading of software to be more rapid and convenient.
In summary, the present invention provides a portable internet logic analyzer, which is flexible and convenient to use, has a self-contained power supply and is low in cost, and the characteristics of cooperative sharing of the internet are utilized to make the portable internet logic analyzer have wide application, and the logic analyzer combines the high-speed parallel data processing capability of the logic data analyzer and the strong real-time data processing capability of the embedded processor, and the two parts work cooperatively to complete the function of the logic analyzer, so that the logic analyzer has the advantages of supporting remote display based on the internet, multi-user cooperation, supporting system online upgrade, and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. A portable Internet logic analyzer is characterized by comprising a logic data analyzer, an embedded system board, a data acquisition circuit, a clock trigger circuit and an LCD touch display screen, wherein the data acquisition circuit and the clock trigger circuit are connected with the logic data analyzer, the logic data analyzer is connected with the embedded system board through peripheral I/O (input/output), the LCD touch display screen is connected to an MIPIDSI (mobile industry processor interface) external port arranged on the embedded system board, an embedded system arranged in the embedded system board is connected with a local area network through an Ethernet interface arranged on the embedded system board, or is connected and communicated with an external PC (personal computer) through a WIFI (wireless fidelity) module and a mobile network module;
the logic data analyzer is provided with a high-performance low-power-consumption FPGA programmable chip, and the FPGA programmable chip comprises two large-capacity SRAM storage chips which are respectively used for data temporary storage and FPGA configuration and function expansion as well as a JTAG interface;
the embedded system board is provided with an MIPIDSI display interface, a 100Mbps Ethernet network interface, a standard wifi module and a mobile network module, and the embedded system board is provided with a cuttable open source Linux operating system.
2. The portable internet logic analyzer of claim 1, wherein the data acquisition circuit comprises a high speed voltage comparator for comparing the voltage of the input signal with a threshold voltage to make a decision regarding signal logic state 1 or 0, the threshold voltage value being set by the user through the logic data analyzer in the range of TTL level to CMOS, ECL and user-defined threshold.
3. The portable internet logic analyzer of claim 1 or 2, wherein the clock trigger circuit is composed of a low impedance probe and a filter circuit, and is used for introducing an external clock signal from the high speed voltage comparator, performing glitch filtering and voltage variation on the clock signal, and processing the input external clock into a clean clock which meets the requirements of the logic data analyzer.
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