TWI662469B - Logic analysis system and signal processing and display method thereof - Google Patents

Abstract

A logic analysis system and a signal processing and display method thereof, comprising: an analog-to-digital converter connected to a analog signal source for receiving an analog signal provided by an analog signal source for digitizing and outputting; a logic analyzer And electrically connecting with the analog digital converter and the digital signal source, for capturing the digital signal provided by the digital analog signal and the digital signal source, and decoding the digital signal to obtain a corresponding decoding packet; And a display device electrically connected to the logic analyzer for receiving the digital analog signal, the digital signal and the decoding packet, and the display device has a display screen for simultaneously displaying the waveform and digit of the digital analog signal The waveform of the signal and the content of the decoded packet.

Description

Logic analysis system and signal processing and display method thereof

The invention relates to a logic analysis system and a signal processing and display method thereof; in particular, to a logic analysis system and a signal processing and display method for displaying an analog signal, a digital signal and a package content on the same screen.

With the advancement of digital technology, such as electronic wafers, liquid crystal display (LCD) image processing chips, Complementary Metal-Oxide Semiconductor (CMOS), and Charge Coupled Device (CCD), etc. Electronic devices for transmitting data have become increasingly popular. With the advancement of digital technology, such as electronic wafers, liquid crystal display (LCD) image processing chips, Complementary Metal-Oxide Semiconductor (CMOS), and Charge Coupled Device (CCD), etc. Electronic devices for transmitting data have become increasingly popular. When the R&D personnel develops the above-mentioned electronic device, the logic analyzer is usually used to extract the digital signal in the data outputted by the object to be tested, and the digital device is determined by analyzing the digital signal captured. Is the design normal?

However, in the currently known technology, if the signal to be detected is an analog signal, the logic analyzer cannot directly use the analog signal to capture and display the analog signal, and an oscilloscope is required to perform analog signal capture and display. Therefore, in the prior art, there is no logic analysis system that can simultaneously capture the analog signal and the digital signal and simultaneously display the captured result. As for R&D engineers, the efficiency of research and development cannot be further improved, and there is room for improvement.

In view of this, the object of the present invention is to provide a logic analysis system and a signal processing and display method thereof, which can display analog signals, digital signals and decoding packets simultaneously on the same display screen by using a logic analyzer to provide a research and development engineer intuitively. Observe analog signals and digital signals to improve R&D efficiency.

In order to achieve the above object, the logic analysis system provided by the present invention comprises: an analog-to-digital converter electrically connected to a analog signal source for receiving a analog signal provided by the analog signal source for digitizing and outputting; a logic analyzer electrically coupled to the analog-to-digital converter and a digital signal source for capturing the digitized analog signal and a digital signal provided by the digital signal source, and decoding the digital signal And obtaining a corresponding decoding packet; and a display device electrically connected to the logic analyzer for receiving the digitized analog signal, the digital signal and the decoding packet, the display device having a display screen The waveform of the analog signal after digitization, the waveform of the digital signal, and the content of the decoding packet are simultaneously displayed.

In order to achieve the above object, the signal processing and display method of the logic analysis system provided by the present invention includes the following steps: taking an analog signal from a class of analog signal sources, and digitally outputting the analog signal; using a logic analyzer Obtaining the analog signal after digitization, and extracting a digital signal from a digital signal source, and decoding the digital signal to obtain a corresponding decoding packet; and displaying the digitized display in a display screen The waveform of the analog signal, the waveform of the digital signal, and the content of the decoding packet.

The effect of the invention is to graphically display the waveform of the digital analog signal, the waveform of the digital signal and the content of the decoding packet in a display screen, so that the researcher can intuitively observe and analyze the analog and digital signal waveforms. Content, which can improve the efficiency of its research and development.

1‧‧‧ analog signal source

2‧‧‧ digital signal source

〔this invention〕

100‧‧‧Logic Analysis System

10‧‧‧ analog digital converter

20‧‧‧Logic Analyzer

30‧‧‧Display device

32‧‧‧Display screen

321‧‧‧ horizontal scale

322‧‧‧Vertical scale

34‧‧‧First display area

341‧‧‧ Block

342‧‧‧ Block

36‧‧‧Second display area

38‧‧‧ Third display area

1 is a block diagram of a logic analysis system in accordance with an embodiment of the present invention.

2 is a flow chart of a signal processing and display method of the logic analysis system of the above embodiment.

Fig. 3 is a schematic view showing a display screen of the display device of the above embodiment.

4 is a schematic diagram of a display screen of a display device according to another embodiment.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Referring to FIG. 1 and FIG. 2, a logic analysis system 100 for extracting an analog signal and a digital signal from a analog signal source 1 and a digital signal source 2 is outputted according to a preferred embodiment of the present invention. For the developer to view, to analyze and compare the analog signal and digital signal. The logic analysis system 100 includes an analog to digital converter 10, a logic analyzer 20, and a display device 30. The signal processing and display method of the logic analysis system of the present invention comprises the steps of: taking a analog signal from the analog signal source 1 and digitizing the analog signal and outputting the analog signal. In the embodiment, the analog-to-digital converter 10 is electrically connected to the analog signal source 1 for receiving analog signals provided by the analog signal source, and comparing the analog signals. The number is digitized and output. Furthermore, the analog-to-digital converter 10 samples the continuous-time analog signal according to a sampling rate, converts it into a discrete-time digital signal, and then further quantizes the discrete-time digital signal obtained by sampling. To obtain the digital analog signal.

The logic analyzer 20 is used to capture the digitized analog signal, and a digital signal is extracted from the digital signal source 2, and the digital signal is decoded to obtain a corresponding decoding packet. In the embodiment, the logic analyzer 20 is electrically connected to the analog-to-digital converter 10 and the digital signal source 2, and is configured to capture the analogized analog signal output by the analog-to-digital converter 10 and the analog signal. The digital signal provided by the digital signal source 2 is generated (or generated), and the digital signal is decoded (or interpreted) according to a decoding means to obtain a corresponding decoding packet. In practice, the logic analyzer 20 and the digital signal source 2 and the analog digital converter 10 can be electrically connected through a connector such as a probe or a cable to capture the signal, but not limited thereto; The decoding means usually selects a communication protocol corresponding to the object to be tested. In addition, in an embodiment, the logic analyzer 20 includes a memory for temporarily storing the digital signal, the digital signal, and the decoding packet after the digital image is captured, and is captured by the logic analyzer 20 or After the amount of stored data reaches a predetermined capacity, the data stored in the memory is output.

In a display screen, the waveform of the digital signal after the digitization, the waveform of the digital signal, and the content of the decoding packet are simultaneously displayed. In the present embodiment, a display device 30 is provided. The display device 30 is electrically connected to the logic analyzer 20 for receiving the digitized analog signal, the digital signal and the decoding packet from the logic analyzer 20. The display device 30 has a display screen 32 (refer to FIG. 3) for simultaneously displaying the waveform of the analogized analog signal, the waveform of the digital signal, and the content of the decoded packet for review and analysis by the developer. . In the embodiment, the display device 30 is a computer For example, the logic analyzer 20 can transmit the foregoing data to a computer by means of wired transmission or wireless transmission, and the computer is installed with a pair of applications that should be the logic analyzer 20, so that the computer can pass the The application displays the data received from the logic analyzer on the display.

As shown in FIG. 3, in the embodiment, the display screen 32 includes a first display area 34, a second display area 36, and a third display area 38. The first display area 34 is used. The waveform of the analog signal is displayed. The second display area 36 is used to display the waveform of the digital signal, and the third display area 38 is used to display the content of the decoded packet. In this way, the waveform of the analog signal, the waveform of the digital signal, and the content of the decoding packet corresponding to the digital signal can be simultaneously displayed in the same display screen, so that the developer can intuitively observe the analog display. Signal waveform, digital signal waveform, and packet content. In addition, on the display screen 32, a horizontal scale 321 and a vertical scale 322 are also displayed, wherein the horizontal scale 321 indicates a time axis and a time unit, and the time unit can be seconds, milliseconds, microseconds, etc., and can be Demand selection; vertical scale 322 indicates the amplitude unit and size of the analog signal, so as to assist the developer to visually observe the variation of the analog signal waveform. In this embodiment, the amplitude unit is volt, but in other applications. It is not limited to this, it can be changed according to the type of object to be tested, or other units can be selected by the R&D personnel. In addition, the magnitude of the amplitude can also be appropriately selected by the R&D personnel based on the demand, instead of The content shown on the drawings is limited.

In addition, in the embodiment, the first display area 34 and the second display area 36 are located above the third display area 38, and the first display area 34 and the second display area 36 are displayed in parallel alignment, and The waveform of the analog signal, the waveform of the digital signal, and the content of the decoded packet are presented in a time-synchronized manner. For example, in this embodiment, the signals of the analog signal source 1 and the digital signal source 2 are simultaneously started. And on the same timeline graphics The waveforms of the analog signals and the digital signals after digitization are displayed, so as to achieve timing synchronization. Therefore, when the researcher wants to observe the change of the corresponding digital signal (analog signal) output and the timing correlation or time difference generated by inputting a type of analog signal (digital signal), the foregoing display mode It can help the developer to visually observe and analyze the front-to-back timing relationship or response time difference between the waveform of the analog signal and the waveform of the digital signal, the waveform change and the decoding packet content at the moment.

In addition, the first display area 34 is not limited to the analog signal of the single channel. For example, as shown in FIG. 4, in an embodiment, the first display area 34 may be divided into multiple Blocks 341 and 342 are respectively configured to respectively display the waveforms of the digitized analog signals of different channels, and the vertical scale portions of the respective blocks 341 and 342 can also be selected by the developer to select the amplitude unit and the unit size thereof. Not limited to the content shown in the diagram. In addition, the second display area 36 is not limited to display a single digital signal. In an embodiment, multiple digital signals may also be selected for comparison analysis with the digital analog signal. .

In addition, it is worth mentioning that, in an embodiment, the analog-to-digital converter 10 can also be integrated into the logic analyzer 20 to form a logic analyzer having a receivable analog signal and capable of digitizing the analog signal. It is not limited to the separate architecture of the foregoing embodiment.

The analog signal source 1 and the digital signal source 2 may be from the same object to be tested or different objects to be tested, wherein the object to be tested may refer to various signal transmission lines (such as a network route, a USB transmission line or a bus bar), and signals. Transmission connectors (eg, network connectors, USB connectors, or RS232 connectors) or memory devices (eg, embedded multimedia cards), or other electronic products with analog/digital or digital/analog conversion, such as sphygmomanometers, ear Temperature guns, speakers, microphones, etc., but not limited to this. For example, in an embodiment, if the object to be tested that the developer wants to detect is a smart speaker, the digital audio received by the smart speaker is The data can be used as the digital signal output by the digital signal source 2. The analog audio signal generated by the smart speaker after decoding the audio data can be used as the analog signal outputted by the analog signal source 1. In addition, in an embodiment, if the object to be tested that the developer wants to detect is a microphone, the analog audio signal received by the microphone can be used as an analog signal output by the analog signal source 1, and the microphone converts the analog audio signal. The digital audio data outputted can be used as the digital signal output by the digital signal source 2, but it is not limited to other applications.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

Claims (6)

A logic analysis system includes: an analog-to-digital converter electrically coupled to a analog signal source for receiving a analog signal provided by the analog signal source for digitizing and outputting; a logic analyzer, and the An analog digital converter and a digital signal source are electrically connected to capture the digitized analog signal outputted by the analog converter and a digital signal provided by the digital signal source, and decode the digital signal And obtaining a corresponding decoding packet; and a display device electrically connected to the logic analyzer for receiving the digitized analog signal, the digital signal, and the decoding packet from the logic analyzer, the display device having A display screen for simultaneously displaying the waveform of the digital signal after the digitization, the waveform of the digital signal, and the content of the decoding packet. The logic analysis system of claim 1, wherein the display screen comprises a first display area, a second display area, and a third display area, wherein the first display area is configured to display the digitized analog signal. a waveform of the second display area for displaying the waveform of the digital signal; the third display area is configured to display the content of the decoded packet, wherein the first display area and the second display area are located in the third display area Above. The logic analysis system of claim 1 or 2, wherein the display device displays the waveform of the analogized analog signal, the waveform of the digital signal, and the content of the decoded packet in a time-synchronized manner. A signal processing and display method for a logic analysis system, comprising the steps of: using an analog-to-digital converter to extract an analog signal from a analog signal source, and digitizing the analog signal and outputting the analog signal; Using a logic analyzer to capture the digital signal of the analog-to-digital converter output, and extracting a digital signal from a digital signal source, and decoding the digital signal to obtain a corresponding decoding packet; Providing a display device electrically connected to the logic analyzer for receiving the digitized analog signal, the digital signal and the decoding packet from the logic analyzer, and displaying the same in a display screen of the display device The waveform of the analog signal after digitization, the waveform of the digital signal, and the content of the decoding packet. The signal processing and display method of the logic analysis system of claim 4, wherein the display screen comprises a first display area, a second display area and a third display area, wherein the first display area is used for displaying digits a waveform of the analog signal; the second display area is configured to display a waveform of the digital signal; the third display area is configured to display the content of the decoded packet, wherein the first display area and the second display area are Located above the third display area. The signal processing and display method of the logic analysis system according to claim 4 or 5, wherein the waveform of the analogized analog signal, the waveform of the digital signal, and the content of the decoded packet are displayed in a time synchronization manner.