TWI472783B - Data capture and detection method - Google Patents

Description

Data extraction and detection method

The present invention relates to digital data processing, and more particularly to a method of data acquisition and detection.

With the advancement of digital technology, such as memory cards, electronic chips, LCD processing image processing chips, and Complementary Metal-Oxide Semiconductor (CMOS), terminals, in-circuit emulators (In-Circuit) Electronic devices such as Emulator, ICE, etc. that use digital signals to transmit or store data are becoming increasingly popular. In the prior art of detecting electronic devices, a test device is usually used to connect the electronic device, and the electronic device is continuously received to send a digital data, and the digital analyzer continuously captures the digital data and reuses the data. The computer compares the digital data captured by the logic analyzer with the preset correct data to determine whether the electronic device can transmit or store the data correctly.

However, since the detected digital signal is received through the test device, the computer cannot predict in advance what data will be acquired or when it is necessary to start capturing data. As a result, because of the above situation, the data obtained by the logic analyzer is often too much or not complete.

Therefore, in the above method of detecting and extracting digital data, since the electronic device is sending digital data, the logic analyzer cannot accurately capture the segment to be compared in the digital data, and the logic analyzer is usually continuous. Draw the digit The data, so that the research and development personnel must spend more time to set the conditions to filter or find multiple times, in order to find the corresponding section between the digital data and the correct data, and then compare Whether there is a difference in each section, not only is the process time-consuming, but also increases the workload of the R&D personnel, which in turn makes the inspection operation less effective.

In view of this, the main purpose of the present invention is to provide a method for data acquisition and detection, which can capture subsequent digital data after sending and receiving a predetermined packet, and can greatly reduce the time taken for the developer to detect.

In order to achieve the above object, the present invention provides a data acquisition method for capturing digital data sent by a test object, and the digital data includes a plurality of packets; the data extraction method comprises the following steps: A. Setting a specific packet content; B. detecting whether each packet sent by the object to be tested has the content of the packet; C. when detecting that the object to be tested sends a packet having the content of the specific packet, simultaneously starting a logic analysis The instrument retrieves the digital data sent subsequently.

According to the above concept, the present invention provides a data detecting method for detecting the correctness of a digital data sent by a test object, and the digital data includes a plurality of packets; the data capturing method comprises the following steps: A. Setting a specific packet content; B. detecting whether each packet sent by the object to be tested has the content of the packet; C. When the test object is sent out with the packet with the specific packet content, a logic analyzer is simultaneously started to retrieve the digital data sent subsequently; D. The digital data captured in step C is compared with a correct data. The difference between the two is based on the judgment of the correctness of the digital data sent by the test object.

In this way, through the design of the above-mentioned data acquisition and detection method, the corresponding digital data can be immediately captured after the predetermined object is issued, so that the data acquisition does not generate an error, thereby greatly reducing the research and development. The time of the staff comparison.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

The invention is used for extracting and detecting data when a test system detects an object to be tested. Referring to FIG. 1, the test system includes an electronic device 10, a computer 20, and a logic analyzer 30. The electronic device 10 is connected to the object to be tested 40 through a transmission interface (such as USB, SATA, etc.) for continuously receiving digital data sent from the object to be tested 40, and the digital data includes a plurality of packets. . The logic analyzer 30 connects the computer 20 to the transmission interface 12. In this embodiment, the object to be tested 40 is an In-Circuit Emulator (ICE).

For example, when the object to be tested 40 simulates a processor (CPU) operation and sends digital data to control the operation of the electronic device 10, it will first be in a specific packet. As the starting packet of the digital data. In this way, when the researcher wants to detect the object to be tested 40 to control whether the digital data of other electronic components is correct, only the digital data after the specific packet can be retrieved for analysis. Therefore, referring to FIG. 2, through the method provided by the present invention, digital data starting from a specific packet content can be accurately captured, and the method includes the following steps:

A. Set a specific packet content. For example, in this embodiment, the content of the packet is set to 11001100.

B. Detecting whether each packet sent by the object to be tested 40 contains the content of the packet.

C. Referring to FIG. 3, when the test object 40 is sent out to send the packet with the specific packet content, the logic analyzer 30 is simultaneously activated to capture the digital data D1 sent by the object 40 to be tested, and the logic is The digital data D1 captured by the analyzer 30 is stored in the computer 20, and the starting packet of the digital data D1 contains the contents of the packet set in step A.

D. Display the digital data captured and stored in step C on a display device. In this embodiment, the display device is a screen of the computer 20.

In this way, by using the specific packet as the initial detection design, the subsequent corresponding digital data can be accurately captured, so that no error occurs when the data is captured.

In addition, through the design of the above signal acquisition method, a data detection method can be extended, which enables the research and development personnel to compare the captured data with a correct data, thereby determining the digital data sent by the object to be tested 40. is it right or not. The method includes the following steps:

A. Set a specific packet content. In this embodiment, the content of the packet is also set to 11001100, and the content of the packet is set to be the same as the content of the starting packet of the correct data to be compared.

B. Detecting whether each packet sent by the object to be tested 40 contains the content of the packet.

C. When the test object 40 is sent out of the packet with the specific packet content, the logic analyzer 30 is simultaneously activated to capture the digital data D1 sent by the object 40 to be tested, and the logic analyzer 30 is configured to be The digital data D1 is stored in the computer 20.

D. Please refer to FIG. 4, and simultaneously display the digital data D1 captured and stored in step C and the correct data D2 on the display device. In this way, the developer does not need to spend time looking for the corresponding data section, and can compare the difference between the digital data D1 captured by step C and the correct data D2 directly on the display device. And determining the correctness of the digital data sent by the object to be tested 40.

In addition, in step D, when there is a difference between the digital data D1 captured in step B and the correct data D2, as shown in FIG. 4, the difference is displayed in a different color on the screen of the computer 20. In order to enable developers to perform comparison operations more quickly. Of course, in addition to the use of different colors, you can also use different fonts, different sizes or other different display methods to achieve the purpose of labeling differences.

Finally, the above description is only a preferred embodiment of the present invention, and does not For example, the specific packet is not limited to the data transmission of the emulator. For example, when a message is transmitted between the computer and a terminal, the specific character symbol sent may also be used as a specific packet. Interpretation of the content. In addition, in some cases, the object to be tested may be used as a manipulation logic analyzer, and directly connected to the logic analyzer signal, so that the packets of the digital data to be outputted may be set in the packets. The packet is originally included to indicate that the logic analyzer can start to retrieve data. In this case, in step A, the content of the boot packet can be set as the specific packet content, thereby avoiding double boot. The situation happened. Furthermore, variations of the equivalent methods of the present invention and the scope of the claims are intended to be included in the scope of the invention.

10‧‧‧Electronic devices

20‧‧‧ computer

30‧‧‧Logic Analyzer

40‧‧‧Test object

1 is a structural diagram of a test system using the method of the present invention; and FIG. 2 is a flow chart of a method for capturing the present invention.

3 is a waveform diagram of the extraction using the capture method of the present invention.

FIG. 4 is a schematic diagram of waveforms for comparison of the capture detection methods of the present invention.

Claims (9)

A data acquisition method for capturing digital data sent by a sample to be tested, and the digital data includes a plurality of packets; the data extraction method comprises the following steps: A. setting a specific packet content; B. Detecting whether each of the packets sent by the object to be tested has the content of the packet; C. when detecting that the object to be tested sends the packet with the specific packet content, simultaneously starting a logic analyzer to retrieve the digital data sent subsequently. The data extraction method of claim 1, wherein after step C, there is further included a step of: D. displaying the digital data captured in step C on a display device. The data capture method of claim 1, wherein the packet of the digital data includes a boot packet for instructing the logic analyzer to start capturing data; in step A, setting the packet content to the Start the contents of the package. A data detection method for detecting the correctness of a digital data sent by a test object, and the digital data includes a plurality of packets; the data extraction method comprises the following steps: A. setting a specific packet content; Detecting whether each of the packets sent by the object to be tested has the content of the packet; C. when detecting that the object to be tested sends the packet with the specific packet content, simultaneously starting a logic analyzer to retrieve the digital data sent subsequently ; D. Compare the difference between the digital data captured in step C and a correct data. Different, and according to the judgment of the correctness of the digital data sent by the test object. The data detecting method according to claim 4, wherein in step D, the digital data captured in step C and the correct data are displayed on a display device. The data detecting method according to claim 5, wherein in the step D, the difference between the digital data captured in the step C and the correct data is displayed on the display device in a different display manner. The data detecting method according to claim 6, wherein in step D, the difference is displayed in a different color. The data detecting method according to claim 4, wherein the content of the starting packet of the correct data in step D is equal to the content of the specific packet set in step A. The data detecting method of claim 4, wherein the packet of the digital data includes a booting packet for instructing the logic analyzer to start capturing data; in step A, setting the content of the packet to the booting The content of the packet.