FPGA Hardware Design Guide

A practical FPGA hardware design guide based on real-world project experience.

Core Design Philosophy

1. Pipeline Architecture First

When processing high-speed data streams (video, network packets), adopt multi-stage pipeline design:

• Single-stage processing: Combinational logic delay too large, prone to timing violations
• Multi-stage pipeline: Insert registers at each stage, distribute delay, increase clock frequency
• Typical applications: RGB-to-YUV conversion, image filtering, protocol parsing

Real Case: RGB-to-YUV converter with 5-stage pipeline

• Stage 0: Input register (synchronize input signals)
• Stage 1: Multiply operation (coefficient * pixel value)
• Stage 2: Partial accumulation (Rcoef_r + Gcoef_g)
• Stage 3: Final accumulation (+ B*coef_b)
• Stage 4: Shift and saturation (truncate result to 8-bit)