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Paper: 'Ultra-fast computation of fractal dimension for RGB images' (Pattern Analysis and Applications, 2025) Python (fractal_dimension.py): - DBC algorithm with numpy vectorization (29x faster than scalar) - fd_compress_hint: FD → voltage mode (STORE/COMPUTE/APPROX/MORPHIC) - 7/7 tests pass (Sierpinski, random, gradient, checkerboard, fBm, constant, RGB) - Q16_16 integer arithmetic internally FPGA (fractal_box_counter.v + fractal_fd_selector.v): - 5-state FSM: IDLE → COLLECT → FINALIZE → STORE_LOG → REGRESS → DONE - 8 power-of-two scales (2, 4, 8, ..., 256) - Linear regression via Q16_16 64-bit arithmetic - FD clamped to [1.0, 3.0] in Q16_16 - Selector: FD < 2.3 → STORE, < 2.6 → COMPUTE, < 2.9 → APPROX, >= 2.9 → MORPHIC - Integrated into research_stack_top.v FD drives adaptive compression: Low FD (smooth) → STORE mode (minimal compression) High FD (rough) → MORPHIC mode (aggressive compression)
64 lines
2.2 KiB
Bash
Executable file
64 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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cd "$(dirname "$0")"
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# Fractal Box Counter — standalone build for Tang Nano 9K
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# Verifies synthesis, P&R, and bitstream generation for the
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# fractal dimension computation modules.
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TOP="fractal_box_counter"
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CST="research_stack_tangnano9k.cst"
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JSON="fractal_box_counter.json"
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PNR="fractal_box_counter_pnr.json"
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FS="fractal_box_counter.fs"
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DEVICE="GW1NR-LV9QN88PC6/I5"
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FAMILY="GW1N-9C"
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FREQ=27
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echo "=== Fractal Box Counter Build ==="
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echo "Top: ${TOP}"
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echo "Device: ${DEVICE}"
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echo "CST: ${CST}"
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echo ""
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# ── Step 1: Synthesis ─────────────────────────────────────────────
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echo "=== Step 1: Synthesis (Yosys) ==="
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yosys -p "
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read_verilog -sv \
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fractal_box_counter.v \
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fractal_fd_selector.v;
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synth_gowin -top ${TOP} -json ${JSON};
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stat
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"
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# ── Step 2: Place & Route ─────────────────────────────────────────
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echo ""
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echo "=== Step 2: Place & Route (nextpnr-himbaechel) ==="
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nextpnr-himbaechel --device "${DEVICE}" --json "${JSON}" --write "${PNR}" \
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--freq "${FREQ}" --vopt "family=${FAMILY}" --vopt "cst=${CST}"
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# ── Step 3: Bitstream ─────────────────────────────────────────────
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echo ""
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echo "=== Step 3: Bitstream (gowin_pack) ==="
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gowin_pack -d "${FAMILY}" -o "${FS}" "${PNR}"
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# ── Step 4: Resource Report ───────────────────────────────────────
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echo ""
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echo "=== Step 4: Resource Usage Report ==="
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if [ -f "${JSON}" ]; then
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echo "Synthesis JSON: ${JSON}"
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# Extract cell counts from yosys stat output (already printed above)
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fi
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if [ -f "${PNR}" ]; then
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echo "P&R JSON: ${PNR}"
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fi
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if [ -f "${FS}" ]; then
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FS_SIZE=$(stat -c%s "${FS}" 2>/dev/null || stat -f%z "${FS}" 2>/dev/null || echo "unknown")
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echo "Bitstream: ${FS} (${FS_SIZE} bytes)"
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else
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echo "WARNING: Bitstream not generated!"
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fi
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echo ""
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echo "=== Build complete: ${FS} ==="
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ls -lh "${FS}" 2>/dev/null || true
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