70 lines
2.2 KiB
Python
70 lines
2.2 KiB
Python
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import numpy as np
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from inire.geometry.collision import CollisionEngine
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from inire.geometry.primitives import Port
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from inire.router.astar import AStarRouter
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from inire.router.cost import CostEvaluator
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from inire.router.danger_map import DangerMap
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from inire.router.pathfinder import PathFinder
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from inire.utils.visualization import plot_routing_results
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from shapely.geometry import box
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def main() -> None:
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print("Running Example 07: Fan-Out (5 Nets)...")
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# 1. Setup Environment
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# Small area for fast and reliable demonstration
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bounds = (0, 0, 100, 100)
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engine = CollisionEngine(clearance=2.0)
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# Wide bottleneck at x=50, 60um gap (from y=20 to y=80)
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obstacles = [
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box(50, 0, 55, 20),
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box(50, 80, 55, 100),
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]
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for obs in obstacles:
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engine.add_static_obstacle(obs)
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danger_map = DangerMap(bounds=bounds)
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danger_map.precompute(obstacles)
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evaluator = CostEvaluator(engine, danger_map, greedy_h_weight=1.5)
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# Increase node_limit for more complex search
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router = AStarRouter(evaluator, node_limit=50000)
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pf = PathFinder(router, evaluator, max_iterations=2)
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# 2. Define Netlist: Fan-Out Configuration
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netlist = {}
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num_nets = 10
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start_x = 10
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# Bundle centered at y=50, 4um pitch
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start_y_base = 50 - (num_nets * 4.0) / 2.0
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end_x = 90
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end_y_base = 10
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end_y_pitch = 80.0 / (num_nets - 1)
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for i in range(num_nets):
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sy = start_y_base + i * 4.0
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ey = end_y_base + i * end_y_pitch
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net_id = f"net_{i:02d}"
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netlist[net_id] = (Port(start_x, sy, 0), Port(end_x, ey, 0))
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net_widths = {nid: 2.0 for nid in netlist}
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# 3. Route
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print(f"Routing {len(netlist)} nets through 60um bottleneck...")
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results = pf.route_all(netlist, net_widths)
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# 4. Check Results
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success_count = sum(1 for res in results.values() if res.is_valid)
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print(f"Routed {success_count}/{len(netlist)} nets successfully.")
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# 5. Visualize
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fig, ax = plot_routing_results(results, obstacles, bounds, netlist=netlist)
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fig.savefig("examples/07_large_scale_routing.png")
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print("Saved plot to examples/07_large_scale_routing.png")
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if __name__ == "__main__":
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main()
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