4 System FPGA Program Design

4.1 Design Methodology and Logic Design Overview

4.1.1 Development Environment and Design Flow

Quartus II is Altera's integrated development tool. It integrates all tools and third-party software interfaces required during FPGA/CPLD development, supporting multi-clock analysis, LogicLock block-based design, System-on-a-Programmable-Chip (SOPC), embedded in-system logic analyzer SignalTap II, power estimator, and various other advanced tools. Quartus II offers rich input methods, including schematic, VHDL, Verilog HDL, and other forms for logic program design, making FPGA program development very convenient for designers. The LogicLock feature partitions different logic into distinct FPGA regions, allowing for independent design, implementation, and optimization without modules affecting each other. If an error occurs during design integration, only the specific module needs modification, without impacting other modules. The SignalTap II in-system logic analyzer can capture and display the real-time behavior of all internal FPGA signals. Signal Probe allows for conveniently routing a specific internal circuit signal to an output pin without affecting the existing layout and routing of the design. This eliminates the need for a full recompilation of the entire design, saving time and improving efficiency [26].

It is precisely because of Quartus II's powerful design capabilities, integrating simulation, design, debugging, synthesis, and testing, along with providing rich