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USB interface high-speed and real-time sampling logic analyzer

A USB interface, logic analyzer technology, applied in instruments, computer control, simulators, etc., can solve problems such as limited sampling depth, difficulty in capturing waveform data, and inability to ensure the integrity of captured waveforms, and achieve the effect of portability.

Active Publication Date: 2013-08-21
BEIJING INST OF CONTROL ENG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Traditional logic analyzers have a limited sampling depth, generally 32KB to 512KB, and it is difficult to capture all the waveform data of a fault
[0007] (2) Traditional logic analyzers use non-real-time transmission, and intermittent transmission cannot guarantee the integrity of captured waveforms

Method used

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  • USB interface high-speed and real-time sampling logic analyzer

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Embodiment Construction

[0024] Such as figure 1 Shown is a structural principle block diagram of the present invention. Including single-chip microcomputer system and FPGA system, wherein, single-chip microcomputer system includes USB interface module, GPIF module, SPI bus module, FPGA boot configuration module and RAM program execution module; FPGA system includes FPGA program execution module, FIFO controller module, indicator light module and Channel sampling rate selection / sampling module;

[0025] The single-chip system communicates with the external PC through its USB interface module, and the PC sends the configuration program of the single-chip system to the RAM program execution module through the USB interface module for storage and execution; The FPGA configuration file input through the USB interface module is transparently forwarded to the FPGA program execution module, thereby configuring the FPGA system to make the FPGA start to work; the PC sends the remote control command to the SPI...

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Abstract

A USB interface high-speed and real-time sampling logic analyzer comprises a single chip microcomputer system and an FPGA system. The single chip microcomputer system comprises a USB interface module, a GPIF module, an SPI bus module, an FPGA guiding configuration module and an RAM program executing module. The FPGA system comprises an FPGA program executing module, an FIFO controller module, an indicator light module and a channel sampling rate selecting / sampling module. The structure of the single chip microcomputer system and the FPGA system is adopted, and therefore the USB interface high-speed and real-time sampling logic analyzer has the advantage of being fast and real-time in sampling. By means of the single chip microcomputer system, a synchronous clock of a GPIF state machine can operate with 100MHz, and the purpose that a USB bus transmits 600Mbps sampling original data in real time is achieved.

Description

technical field [0001] The invention relates to a high-speed real-time sampling logic analyzer with a USB interface, which belongs to the field of digital signal processing. Background technique [0002] USB (Universal Serial BUS) is an external bus standard used to regulate the connection and communication between computers and external devices. It is an interface technology applied in the PC field. The USB interface supports the plug-and-play and hot-swap functions of the device. Since the USBV0.7 version was published on November 11, 1994, the USB version has experienced years of development, and now it has developed into version 3.0, which has become the standard expansion interface in computers. The USB versions are very compatible. The maximum transmission rate of USB1.1 is 12Mbps, the maximum transmission rate of USB2.0 is 480Mbps, and the maximum transmission rate of USB3.0 is 5Gbps. [0003] FPGA (Field-Programmable Gate Array), that is, field programmable gate a...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 李鹏宇郭向英郝伟盛庄吴瑾董燕张金巍
Owner BEIJING INST OF CONTROL ENG
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