CN112051427A - High-resolution oscilloscope vertical scaling circuit and method - Google Patents
High-resolution oscilloscope vertical scaling circuit and method Download PDFInfo
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- CN112051427A CN112051427A CN202010812364.5A CN202010812364A CN112051427A CN 112051427 A CN112051427 A CN 112051427A CN 202010812364 A CN202010812364 A CN 202010812364A CN 112051427 A CN112051427 A CN 112051427A
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- 238000012545 processing Methods 0.000 claims abstract description 24
- 238000013506 data mapping Methods 0.000 claims abstract description 21
- 238000007726 management method Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 3
- 238000013507 mapping Methods 0.000 claims description 21
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
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Abstract
The invention discloses a vertical scaling circuit and a method of a high-resolution oscilloscope, and belongs to the field of test instruments. The circuit comprises a collected data mapping circuit, a bitmap superposition circuit, a main window bitmap storage circuit, a high-resolution window bitmap storage circuit, an analog-digital converter (ADC), a clock circuit, a Central Processing Unit (CPU), a Liquid Crystal Display (LCD), a collected data processing circuit, a clock management circuit, a collected storage control circuit and a memory bank. The analog-digital converter ADC sends the acquired data to the acquired data processing circuit; the collected data processing circuit sends the processed collected data to the collection storage control circuit; the acquisition and storage control circuit stores the acquired data into the memory bank; the acquired data mapping circuit sends the mapped data to the bitmap superposition circuit; the bitmap overlapping circuit overlaps the data sent by the collected data mapping circuit at a frequency. The invention can display the data information of 12 bits and more.
Description
Technical Field
The invention belongs to the field of test instruments, and particularly relates to a vertical scaling circuit and a method of a high-resolution oscilloscope.
Background
High-resolution oscilloscopes have become an important development direction of oscilloscopes all the time, and how to process and display acquired data with resolution of 12 or more in the design of the high-resolution oscilloscopes becomes more and more important. The resolution of the data collected in the high-resolution oscilloscope is greater than or equal to 12 bits, and the 12-bit data information is completely displayed, so that a display screen with 4096 levels of resolution in the vertical direction is required, but the size and price of the display screen of the oscilloscope are limited, and the vertical resolution of the display screen of the oscilloscope can hardly reach 4096 levels. Therefore, it is very important how to completely and effectively display the data information acquired by the high-resolution oscilloscope to the maximum extent. At present, the common practice is to compress the digit of the acquired data to match the resolution of the display screen, but the 12-digit resolution of the acquired data of the high-resolution oscilloscope cannot be fully utilized, so that the acquired data information is lost.
At present, the common practice is to compress the digit of the acquired data to match the resolution of the display screen, but the 12-digit resolution of the acquired data of the high-resolution oscilloscope cannot be fully utilized, so that the acquired data information is lost.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the high-resolution oscilloscope vertical scaling circuit and the method, which are reasonable in design, overcome the defects of the prior art and have good effects.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-resolution oscilloscope vertical zooming circuit comprises an acquired data mapping circuit, a bitmap superposition circuit, a main window bitmap storage circuit, a high-resolution window bitmap storage circuit, an analog-to-digital converter (ADC), a clock circuit, a Central Processing Unit (CPU), a Liquid Crystal Display (LCD), an acquired data processing circuit, a clock management circuit, an acquired storage control circuit and a memory bank;
a clock circuit configured to provide clocks required by the ADC and the FPGA;
the clock management circuit is configured to be used for generating and managing clocks required in the FPGA;
the analog-digital converter ADC is configured to be used for completing the acquisition of signals and sending the acquired data to the acquired data processing circuit;
the acquisition data processing circuit is configured to complete corresponding data processing and send the processed acquisition data to the acquisition storage control circuit;
the acquisition storage control circuit is configured to store the acquired data into the memory bank, and when the acquired data needs to be displayed, the acquisition storage control circuit reads the acquired data out of the memory bank and sends the acquired data to the acquired data mapping circuit;
the acquired data mapping circuit is configured to complete mapping of the acquired data, and the mapping principle is as follows: (1) determining the number of bits of acquired data in the main window according to the vertical resolution of a display area defined by the CPU on a screen; (2) carrying out full bit width mapping on the acquired data in the high-resolution window, and sending the mapped data to a bitmap superposition circuit;
the bitmap overlapping circuit is configured for overlapping the data sent by the collected data mapping circuit frequently, generating a main window bitmap and a high-resolution window bitmap, and respectively storing the main window bitmap and the high-resolution window bitmap into the main window bitmap storage circuit and the high-resolution window bitmap storage circuit;
and the CPU is configured to read the main window bitmap and the high-resolution window bitmap and then send the main window bitmap and the high-resolution window bitmap to the LCD for display, wherein the main window reflects the full appearance of the waveform, and the high-resolution window sufficiently displays the details of the waveform.
In addition, the invention also provides a high-resolution oscilloscope vertical scaling method, which adopts the high-resolution oscilloscope vertical scaling circuit and specifically comprises the following steps:
step 1: the acquired data acquired by the analog-digital converter ADC is firstly sent to an acquired data processing circuit for corresponding processing, and then is stored in a memory bank by an acquisition and storage control circuit;
step 2: the acquisition data mapping circuit receives the data read from the memory bank by the acquisition storage control circuit and finishes mapping, the digit of the acquired data is determined in the main window according to the vertical resolution of the CPU in a display area defined on the screen, and linear mapping is finished, so that the mapping can display the full appearance of the waveform; full bit width mapping of acquired data is carried out in the high-resolution window, so that details of the waveform can be displayed, and high-precision testing and analysis are completed;
and step 3: the bitmap overlapping circuit overlaps the data sent by the collected data mapping circuit at a frequency, generates a main window bitmap and a high-resolution window bitmap, and respectively stores the main window bitmap and the high-resolution window bitmap in the main window bitmap storage circuit and the high-resolution window bitmap storage circuit. The CPU reads the main window bitmap and the high-resolution window bitmap, and then sends the main window bitmap and the high-resolution window bitmap to the LCD for display.
The invention has the following beneficial technical effects:
the invention can display all the data information of 12 bits and more than 12 bits acquired by the ADC, so that the advantage of high-precision measurement of the high-resolution oscilloscope is fully exerted, and the advantage of high-precision measurement of the high-resolution oscilloscope is fully exerted.
Drawings
FIG. 1 is a schematic diagram of a high resolution oscilloscope vertical scaling circuit.
FIG. 2 is a flow chart of a high resolution oscilloscope vertical scaling.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
example 1:
as shown in fig. 1, a vertical scaling circuit of a high-resolution oscilloscope comprises an acquired data mapping circuit, a bitmap superposition circuit, a main window bitmap storage circuit, a high-resolution window bitmap storage circuit, an analog-to-digital converter ADC, a clock circuit, a CPU, an LCD, an acquired data processing circuit, a clock management circuit, an acquired storage control circuit and a memory bank;
a clock circuit configured to provide clocks required by the ADC and the FPGA;
the clock management circuit is configured to be used for generating and managing clocks required in the FPGA;
the analog-digital converter ADC is configured to be used for completing the acquisition of signals and sending the acquired data to the acquired data processing circuit;
the acquisition data processing circuit is configured to complete corresponding data processing and send the processed acquisition data to the acquisition storage control circuit;
the acquisition storage control circuit is configured to store the acquired data into the memory bank, and when the acquired data needs to be displayed, the acquisition storage control circuit reads the acquired data out of the memory bank and sends the acquired data to the acquired data mapping circuit;
the acquired data mapping circuit is configured to complete mapping of the acquired data, and the mapping principle is as follows: (1) determining the number of bits of acquired data in the main window according to the vertical resolution of a display area defined by the CPU on a screen; (2) carrying out full bit width mapping on the acquired data in the high-resolution window, and sending the mapped data to a bitmap superposition circuit;
the bitmap overlapping circuit is configured for overlapping the data sent by the collected data mapping circuit frequently, generating a main window bitmap and a high-resolution window bitmap, and respectively storing the main window bitmap and the high-resolution window bitmap into the main window bitmap storage circuit and the high-resolution window bitmap storage circuit;
and the CPU is configured to read the main window bitmap and the high-resolution window bitmap and then send the main window bitmap and the high-resolution window bitmap to the LCD for display, wherein the main window reflects the full appearance of the waveform, and the high-resolution window sufficiently displays the details of the waveform.
Example 2:
on the basis of the above embodiment 1, the present invention further provides a vertical scaling method for a high resolution oscilloscope, the flow of which is shown in fig. 2, and the method specifically includes the following steps:
step 1: the acquired data acquired by the ADC is firstly sent to an acquired data processing circuit for corresponding processing, and then is stored in a memory bank by an acquisition and storage control circuit;
step 2: the acquisition data mapping circuit receives the data read from the memory bank by the acquisition storage control circuit and finishes mapping, the digit of the acquired data is determined in the main window according to the vertical resolution of the CPU in a display area defined on the screen, and linear mapping is finished, so that the mapping can display the full appearance of the waveform; full bit width mapping of acquired data is carried out in the high-resolution window, so that details of the waveform can be displayed, and high-precision testing and analysis are completed;
and step 3: the bitmap overlapping circuit overlaps the data sent by the collected data mapping circuit at a frequency, generates a main window bitmap and a high-resolution window bitmap, and respectively stores the main window bitmap and the high-resolution window bitmap in the main window bitmap storage circuit and the high-resolution window bitmap storage circuit. The CPU reads the main window bitmap and the high-resolution window bitmap, and then sends the main window bitmap and the high-resolution window bitmap to the LCD for display.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (2)
1. A high resolution oscilloscope vertical scaling circuit, comprising: the device comprises a collected data mapping circuit, a bitmap superposition circuit, a main window bitmap storage circuit, a high-resolution window bitmap storage circuit, an analog-digital converter (ADC), a clock circuit, a Central Processing Unit (CPU), a Liquid Crystal Display (LCD), a collected data processing circuit, a clock management circuit, a collected storage control circuit and a memory bank;
a clock circuit configured to provide clocks required by the ADC and the FPGA;
the clock management circuit is configured to be used for generating and managing clocks required in the FPGA;
the analog-digital converter ADC is configured to be used for completing the acquisition of signals and sending the acquired data to the acquired data processing circuit;
the acquisition data processing circuit is configured to complete corresponding data processing and send the processed acquisition data to the acquisition storage control circuit;
the acquisition storage control circuit is configured to store the acquired data into the memory bank, and when the acquired data needs to be displayed, the acquisition storage control circuit reads the acquired data out of the memory bank and sends the acquired data to the acquired data mapping circuit;
the acquired data mapping circuit is configured to complete mapping of the acquired data, and the mapping principle is as follows: (1) determining the number of bits of acquired data in the main window according to the vertical resolution of a display area defined by the CPU on a screen; (2) carrying out full bit width mapping on the acquired data in the high-resolution window, and sending the mapped data to a bitmap superposition circuit;
the bitmap overlapping circuit is configured for overlapping the data sent by the collected data mapping circuit frequently, generating a main window bitmap and a high-resolution window bitmap, and respectively storing the main window bitmap and the high-resolution window bitmap into the main window bitmap storage circuit and the high-resolution window bitmap storage circuit;
and the CPU is configured to read the main window bitmap and the high-resolution window bitmap and then send the main window bitmap and the high-resolution window bitmap to the LCD for display, wherein the main window reflects the full appearance of the waveform, and the high-resolution window sufficiently displays the details of the waveform.
2. A vertical scaling method of a high-resolution oscilloscope is characterized by comprising the following steps: the high resolution oscilloscope vertical scaling circuit according to claim 1, comprising the following steps:
step 1: the acquired data acquired by the analog-digital converter ADC is firstly sent to an acquired data processing circuit for corresponding processing, and then is stored in a memory bank by an acquisition and storage control circuit;
step 2: the acquisition data mapping circuit receives the data read from the memory bank by the acquisition storage control circuit and finishes mapping, the digit of the acquired data is determined in the main window according to the vertical resolution of the CPU in a display area defined on the screen, and linear mapping is finished, so that the mapping can display the full appearance of the waveform; full bit width mapping of acquired data is carried out in the high-resolution window, so that details of the waveform can be displayed, and high-precision testing and analysis are completed;
and step 3: the bitmap overlapping circuit overlaps the data sent by the collected data mapping circuit at a frequency, generates a main window bitmap and a high-resolution window bitmap, and respectively stores the main window bitmap and the high-resolution window bitmap in the main window bitmap storage circuit and the high-resolution window bitmap storage circuit. The CPU reads the main window bitmap and the high-resolution window bitmap, and then sends the main window bitmap and the high-resolution window bitmap to the LCD for display.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115856385A (en) * | 2023-02-06 | 2023-03-28 | 深圳市鼎阳科技股份有限公司 | Oscilloscope, waveform display method and storage medium |
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2020
- 2020-08-13 CN CN202010812364.5A patent/CN112051427A/en active Pending
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