SN-L00/hardware/kicad/scripts/autoroute_full.py

#!/usr/bin/env python3
"""
SN-L00 Full Autoroute Pipeline for 8HP Eurorack
Run in KiCad PCB Editor: Tools → Scripting Console
Then: exec(open('scripts/autoroute_full.py').read())

This script:
1. Updates board outline to 8HP (40mm x 100mm)
2. Deletes existing tracks
3. Places all components
4. Exports DSN file
5. Runs Freerouting
6. Imports routed SES file
"""

import pcbnew
import subprocess
import os
import time

board = pcbnew.GetBoard()
board_path = board.GetFileName()
board_dir = os.path.dirname(board_path)

def mm(val):
    return pcbnew.FromMM(val)

def place(x, y):
    return pcbnew.VECTOR2I(mm(x), mm(y))

print("=" * 50)
print("SN-L00 Full Autoroute Pipeline")
print("=" * 50)

# Step 1: Update board outline to 8HP (40mm x 100mm)
print("\n[1/6] Updating board outline to 40mm x 100mm...")
for drawing in board.GetDrawings():
    if drawing.GetClass() == "PCB_SHAPE":
        if drawing.GetShape() == pcbnew.SHAPE_T_RECT:
            drawing.SetStart(pcbnew.VECTOR2I(mm(0), mm(0)))
            drawing.SetEnd(pcbnew.VECTOR2I(mm(40), mm(100)))
            print("  Board outline updated")
            break

# Step 2: Delete all tracks
print("\n[2/6] Deleting existing tracks...")
tracks = list(board.GetTracks())
for track in tracks:
    board.Delete(track)
print(f"  Deleted {len(tracks)} tracks")

# Step 3: Place components (v2 - fixed spacing)
print("\n[3/6] Placing components...")
placements = {
    # Top - OLED display (rotated 90°)
    "MOD3": (20, 15, 90),
    # Audio jacks - centered with good spacing
    "J3": (10, 35, 0),      # RETURN_IN
    "J4": (30, 35, 0),      # TRIG_OUT
    # Button + LED
    "SW1": (20, 48, 0),
    "D5": (32, 48, 0),      # LED near button
    # RP2040-Zero module - centered
    "MOD2": (20, 62, 0),
    # Signal conditioning ICs - well spaced
    "U2": (8, 78, 0),       # 74LVC1G17
    "U4": (32, 78, 0),      # MCP6001
    # Decoupling caps near ICs
    "C4": (4, 78, 90),
    "C5": (14, 78, 90),
    "C6": (28, 82, 90),
    # Protection diodes near jacks circuits
    "D3": (4, 82, 0),
    "D4": (36, 78, 0),
    # Resistors - spread across middle
    "R2": (4, 86, 90),
    "R3": (10, 86, 90),
    "R4": (16, 86, 90),
    "R5": (24, 86, 90),
    "R6": (30, 86, 90),
    "R7": (36, 86, 90),
    # Power section - J2 moved up, components spread out
    "J2": (20, 88, 0),      # Eurorack power header (extends ~6mm down)
    "D2": (4, 92, 0),       # Protection diode
    "U3": (32, 94, 180),    # LDO - moved left from edge
    "C2": (10, 94, 90),     # Input cap
    "C3": (26, 94, 90),     # Output cap
}

placed = 0
for ref, (x, y, rot) in placements.items():
    fp = board.FindFootprintByReference(ref)
    if fp:
        fp.SetPosition(place(x, y))
        fp.SetOrientationDegrees(rot)
        placed += 1

print(f"  Placed {placed} components")

# Step 4: Save and export DSN
print("\n[4/6] Saving board and exporting DSN...")
pcbnew.Refresh()
board.Save(board_path)

dsn_path = os.path.join(board_dir, "SN-L00.dsn")
ses_path = os.path.join(board_dir, "SN-L00.ses")

# Export DSN
if hasattr(pcbnew, 'ExportSpecctraDSN'):
    pcbnew.ExportSpecctraDSN(dsn_path)
    print(f"  Exported: {dsn_path}")
else:
    # Fallback for older KiCad versions
    exporter = pcbnew.SPECCTRA_DB()
    exporter.ExportPCB(dsn_path, False)
    print(f"  Exported: {dsn_path}")

# Step 5: Run Freerouting
print("\n[5/6] Running Freerouting...")
freerouting_jar = "/tmp/freerouting.jar"

if not os.path.exists(freerouting_jar):
    print("  Downloading Freerouting...")
    url = "https://github.com/freerouting/freerouting/releases/download/v2.0.1/freerouting-2.0.1.jar"
    subprocess.run(["curl", "-L", "-o", freerouting_jar, url], check=True)

result = subprocess.run(
    ["java", "-jar", freerouting_jar,
     "-de", dsn_path,
     "-do", ses_path,
     "-mp", "200",
     "-mt", "1",
     "-oit"],
    capture_output=True,
    text=True,
    cwd=board_dir
)

if result.returncode == 0:
    print("  Freerouting completed successfully")
else:
    print(f"  Freerouting error: {result.stderr}")

# Step 6: Import SES
print("\n[6/6] Importing routed session...")
if os.path.exists(ses_path):
    if hasattr(pcbnew, 'ImportSpecctraSES'):
        pcbnew.ImportSpecctraSES(ses_path)
        print(f"  Imported: {ses_path}")
    else:
        # Fallback
        importer = pcbnew.SPECCTRA_DB()
        importer.ImportSES(ses_path)
        print(f"  Imported: {ses_path}")

    pcbnew.Refresh()
    print("\n" + "=" * 50)
    print("DONE! Save (Ctrl+S) and run DRC to verify.")
    print("=" * 50)
else:
    print(f"  ERROR: SES file not found: {ses_path}")