A Logic Analyzer with Continuous Trigger Function of Serial Bus Protocol

Abstract

The invention discloses a logic analyzer with a serial bus protocol continuous triggering function. Each continuous triggering module in an FPGA corresponds to a serial bus protocol. A clock timer in each continuous triggering module provides a clock overflow mark and clock data. Each continuous triggering state machine corresponds to a triggering mode. Channel data are received, and continuous triggering data collecting is triggered according to continuous triggering control words. In a next cycle after data collecting is completed, data storing enable signals are enabled to be effective. A data selector is triggered to select continuous triggering data to be output to a data splicing module. The data storing enable signals are selected to be output to the data selector. The data splicing module combines the clock data and the continuous triggering data and then output the data to the data selector. The data selector in the FPGA outputs corresponding continuous triggering data and data storing enable signals to an asynchronization FIFO module according to triggering type control words. The asynchronization FIFO module stores the continuous triggering data which are provided for an ARM processor to read. According to the logic analyzer, hardware is used for achieving continuous triggering of the serial bus protocol.

Description

technical field [0001] The invention belongs to the technical field of data domain testing, and more specifically relates to a logic analyzer with a serial bus protocol continuous trigger function. Background technique [0002] With the rapid development of digital electronic technology, the composition of modern digital electronic systems is becoming more and more complex, and the communication between various components of the system is increasingly dependent on a variety of digital buses, which also puts higher demands on the field of data testing. Require. [0003] As a traditional data domain test instrument, a logic analyzer plays an irreplaceable role in the development and testing of hardware logic, timing analysis, fault diagnosis and embedded software codes of digital electronic systems, and is indispensable for product development and functional maintenance of digital electronic systems. missing tools. In order to improve the test capability of logic analyzers f...

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Problems solved by technology

In addition, in some cases, the tester does not necessarily need to know the specific waveform, but only needs to monitor one or several specific conditions such as data, address or read and write control within a period of time, the traditional single not available when triggered

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