LUT Function Display Formats for FPGA Design Analysis
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Solution Overview
Problem
Users of electronic design tools face difficulties in analyzing and combining logic functions implemented on field programmable gate arrays (FPGAs) due to the need to decode hexadecimal initialization values of lookup tables (LUTs) to determine if they can be combined, which is cumbersome and not user-friendly.
Innovation Solution
A graphical user interface (GUI) is provided that allows users to select and view the functions of LUTs in different formats such as schematic, truth table, or Karnaugh map, eliminating the need to convert hexadecimal initialization values, thereby simplifying the analysis and combination of logic functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hexadecimal initialization values are displayed in traditional format, then device complexity is reduced, but ease of operation deteriorates due to the need for decoding
Solution Approach 1:
The patent introduces an intermediary component (the design tool interface) that automatically decodes hexadecimal initialization values and presents them in user-friendly formats such as truth tables, logic expressions, or graphical representations. This intermediary handles the complex decoding process transparently, improving ease of operation without requiring the user to manually decode hexadecimal values.
Solution Approach 2:
The patent creates multiple representations (copies) of the LUT function information in different formats (hexadecimal, truth table, logic expression, graphical). Users can view the same underlying data in whichever format is most convenient for their analysis, eliminating the need to manually decode hexadecimal values while maintaining accuracy.
2Ease of operation
If multiple display formats are provided for LUT functions, then ease of operation improves, but device complexity increases
Solution Approach 1:
The patent implements a universal display system that can present LUT function information in multiple formats (truth tables, logic expressions, graphical representations) through a single integrated interface. This multi-functional capability allows users to switch between different view modes as needed, improving ease of operation while consolidating the complexity within a unified system rather than requiring separate tools for each format.
Solution Approach 2:
The patent provides a dynamic display system where users can interactively switch between different representation formats of LUT functions. The interface adapts to user needs by allowing real-time changes in display mode, enabling users to view the same data in hexadecimal, truth table, or graphical format depending on the analytical task at hand, thereby improving operational flexibility.
3Productivity
If initialization values are decoded and displayed in multiple formats, then ease of operation improves, but loss of time is reduced
Solution Approach 1:
The patent performs preliminary decoding of hexadecimal initialization values automatically during the design tool operation, before the user needs to analyze the LUT functions. The system pre-processes the hexadecimal data and prepares multiple representation formats in advance, so when users need to view LUT functions, the decoded information is already available immediately, eliminating manual decoding time and improving productivity.
Data Source
AI summary
Various approaches for displaying design data that implements an electronic design in lookup tables (LUTs) of a programmable logic device are disclosed. In one approach, a user is presented for selection at least two selectable modes for displaying a function performed by a LUT that is configurable with the design data to implement a function of the electronic design. The modes have associated, different formats for display of a function. In response to selection of an object that represents a first LUT having an assigned initialization value and in response to selection of one of the modes, the function performed by the first LUT, as defined by the initialization value, is displayed in the format associated with the selected mode.