Digital three-dimensional oscilloscope rapid acquisition system based on FPGA

Abstract

The invention discloses a digital three-dimensional oscilloscope rapid acquisition system based on an FPGA. A to-be-measured signal is collected by the ADC module and then is stored in the data collection module through the point extraction module. A DTO _ FIFO is arranged in the data acquisition module, and reading and writing of the DTO _ FIFO are both controlled by the control module through acounter, so that the DTO _ FIFO can read the waveform data of the previous frame for mapping while storing the waveform data of the current frame. When the frame number of waveform mapping in the digital three-dimensional mapping module reaches a set value of the upper computer, the upper computer reads away a mapping result stored in the RAM, converts the mapping result into an RGB value and displays the RGB value in the display module. According to the invention, while the DTO waveform capture rate is improved, FIFO storage resources can be saved.

Description

technical field [0001] The invention belongs to the technical field of digital three-dimensional oscilloscopes, and more specifically relates to a fast acquisition system for digital three-dimensional oscilloscopes based on FPGA. Background technique [0002] With the continuous development of electronic testing technology, the capture of abnormal signals has become a hot issue in the field of time domain testing. Traditional oscilloscopes can only move each frame of waveform that satisfies the trigger to the screen for display, and it is difficult for users to directly observe the frequency of abnormal signals. In order to improve the capture rate of the oscilloscope and solve the user's demand for abnormal signal observation, the digital three-dimensional oscilloscope (Digital Three-Dimensional Oscilloscopes, referred to as DTO), a new type of digital oscilloscope, has gradually become the mainstream of the market. The data collected by DTO is stored in the waveform datab...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it can reduce the dead time and improve the waveform capture rate. The disadvantage is that two FIFO modules need to be instantiated, which uses more FIFO resources, and the control logic is more complicated.

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