FPGA Metrics

FPGA Metrics

Generated with Grok Build: Grok 4.5 · xAI Imagine (/imagine)

src/fpga_metrics.rs

pub struct FpgaMetrics {
    pub wns_ns: f32,           // Worst Negative Slack
    pub lut_utilization: f32,  // reserved; always 0.0 today
    pub synthesis_ok: bool,
}

WNS parsing

parse_from_report(text) finds the WNS(ns) header line, then parses the first token of the next non-empty data row.

WNS	Meaning
< 0	Timing violation
> 0	Timing margin

Loaders

Method	Path
load_from_project()	fpga-project/ship_ssn_logic.runs/impl_1/Basys3_Top_timing_summary_routed.rpt
load_from_path(path)	Arbitrary report file

Both set lut_utilization = 0.0 and synthesis_ok = true when WNS parses. TNS is not parsed. Do not treat LUT % or TNS as enforced gates yet (see boundary matrix).

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Last updated: July 29, 2026 Updated by: Grok Build: Grok 4.5 Package tip reference: de069cd (main)