Add panel-to-PCB mounting system with M3 standoffs
Panel alignment: - PCB offset 10mm from panel top - Component holes aligned: OLED@25mm, jacks@45mm, button@58mm - 4x M3 standoff holes at corners (5,5), (35,5), (5,75), (35,75) Updates: - Panel SVG and spec aligned with PCB layout - Mounting holes added to PCB (Edge.Cuts layer) - Regenerated Gerbers with mounting holes - Updated autoroute.py to add mounting holes automatically DRC: 0 unconnected, 7 cosmetic errors (courtyard overlaps)
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Executable
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#!/usr/bin/env python3
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"""
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SN-L00 Headless Autoroute Pipeline
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Fully automated: place → export DSN → freeroute → import SES → DRC
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Usage:
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# Install dependencies first:
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sudo apt install xvfb
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pip install kigadgets
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# Run:
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python3 scripts/autoroute_headless.py
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Based on: https://github.com/atait/kicad-python
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"""
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import os
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import sys
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import subprocess
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import tempfile
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SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
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KICAD_DIR = os.path.dirname(SCRIPT_DIR)
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PCB_FILE = os.path.join(KICAD_DIR, "SN-L00.kicad_pcb")
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DSN_FILE = os.path.join(KICAD_DIR, "SN-L00.dsn")
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SES_FILE = os.path.join(KICAD_DIR, "SN-L00.ses")
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DRC_FILE = os.path.join(KICAD_DIR, "DRC.rpt")
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FREEROUTING_JAR = "/tmp/freerouting.jar"
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# Component positions for 8HP (40mm x 100mm) layout v2
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PLACEMENTS = {
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"MOD3": (20, 15, 90),
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"J3": (10, 35, 0),
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"J4": (30, 35, 0),
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"SW1": (20, 48, 0),
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"D5": (32, 48, 0),
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"MOD2": (20, 62, 0),
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"U2": (8, 78, 0),
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"U4": (32, 78, 0),
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"C4": (4, 78, 90),
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"C5": (14, 78, 90),
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"C6": (28, 82, 90),
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"D3": (4, 82, 0),
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"D4": (36, 78, 0),
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"R2": (4, 86, 90),
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"R3": (10, 86, 90),
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"R4": (16, 86, 90),
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"R5": (24, 86, 90),
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"R6": (30, 86, 90),
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"R7": (36, 86, 90),
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"J2": (20, 88, 0),
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"D2": (4, 92, 0),
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"U3": (32, 94, 180),
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"C2": (10, 94, 90),
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"C3": (26, 94, 90),
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}
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def check_dependencies():
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"""Check if required tools are available."""
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missing = []
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# Check xvfb
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if subprocess.run(["which", "xvfb-run"], capture_output=True).returncode != 0:
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missing.append("xvfb (sudo apt install xvfb)")
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# Check java
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if subprocess.run(["which", "java"], capture_output=True).returncode != 0:
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missing.append("java (sudo apt install default-jre)")
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# Check kicad-cli
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if subprocess.run(["which", "kicad-cli"], capture_output=True).returncode != 0:
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missing.append("kicad-cli (install KiCad)")
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if missing:
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print("Missing dependencies:")
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for dep in missing:
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print(f" - {dep}")
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sys.exit(1)
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def download_freerouting():
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"""Download Freerouting if not present."""
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if not os.path.exists(FREEROUTING_JAR):
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print("Downloading Freerouting...")
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url = "https://github.com/freerouting/freerouting/releases/download/v2.0.1/freerouting-2.0.1.jar"
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subprocess.run(["curl", "-L", "-o", FREEROUTING_JAR, url], check=True)
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def run_pcbnew_script(script_content):
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"""Run a Python script inside pcbnew using xvfb."""
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with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False) as f:
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f.write(script_content)
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script_path = f.name
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try:
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# Run pcbnew with xvfb, execute script, then exit
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# This is a workaround since pcbnew doesn't have a direct script execution mode
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result = subprocess.run(
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["xvfb-run", "-a", "python3", "-c", f"""
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import sys
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sys.path.insert(0, '/usr/lib/python3/dist-packages')
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try:
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import pcbnew
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exec(open('{script_path}').read())
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except Exception as e:
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print(f"Error: {{e}}")
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sys.exit(1)
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"""],
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capture_output=True,
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text=True,
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timeout=120
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)
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print(result.stdout)
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if result.stderr:
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print(result.stderr)
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return result.returncode == 0
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finally:
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os.unlink(script_path)
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def place_and_export():
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"""Place components and export DSN using pcbnew API."""
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script = f'''
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import pcbnew
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board = pcbnew.LoadBoard("{PCB_FILE}")
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def mm(val):
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return pcbnew.FromMM(val)
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def place(x, y):
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return pcbnew.VECTOR2I(mm(x), mm(y))
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# Update board outline
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for drawing in board.GetDrawings():
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if drawing.GetClass() == "PCB_SHAPE":
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if drawing.GetShape() == pcbnew.SHAPE_T_RECT:
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drawing.SetStart(pcbnew.VECTOR2I(mm(0), mm(0)))
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drawing.SetEnd(pcbnew.VECTOR2I(mm(40), mm(100)))
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print("Updated board outline")
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break
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# Delete tracks
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tracks = list(board.GetTracks())
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for track in tracks:
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board.Delete(track)
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print(f"Deleted {{len(tracks)}} tracks")
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# Place components
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placements = {repr(PLACEMENTS)}
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placed = 0
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for ref, (x, y, rot) in placements.items():
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fp = board.FindFootprintByReference(ref)
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if fp:
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fp.SetPosition(place(x, y))
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fp.SetOrientationDegrees(rot)
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placed += 1
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print(f"Placed {{placed}} components")
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# Save board
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board.Save("{PCB_FILE}")
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print("Saved board")
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# Export DSN
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try:
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result = pcbnew.ExportSpecctraDSN("{DSN_FILE}")
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if result:
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print("Exported DSN")
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else:
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print("DSN export returned False - trying alternate method")
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# Try with board parameter
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result = pcbnew.ExportSpecctraDSN(board, "{DSN_FILE}")
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print(f"Alternate export result: {{result}}")
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except Exception as e:
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print(f"DSN export error: {{e}}")
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'''
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return run_pcbnew_script(script)
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def run_freerouting():
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"""Run Freerouting autorouter."""
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print("Running Freerouting...")
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result = subprocess.run(
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["java", "-jar", FREEROUTING_JAR,
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"-de", DSN_FILE,
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"-do", SES_FILE,
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"-mp", "200",
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"-mt", "1",
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"-oit"],
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capture_output=True,
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text=True,
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cwd=KICAD_DIR
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)
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for line in (result.stdout + result.stderr).split('\n'):
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if 'completed' in line.lower() or 'error' in line.lower():
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print(f" {line.split(']')[-1].strip()}")
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return os.path.exists(SES_FILE)
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def import_ses():
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"""Import SES file using pcbnew API."""
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script = f'''
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import pcbnew
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board = pcbnew.LoadBoard("{PCB_FILE}")
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try:
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result = pcbnew.ImportSpecctraSES("{SES_FILE}")
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if result:
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print("Imported SES")
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board.Save("{PCB_FILE}")
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print("Saved board")
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else:
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print("SES import returned False - trying alternate method")
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result = pcbnew.ImportSpecctraSES(board, "{SES_FILE}")
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if result:
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board.Save("{PCB_FILE}")
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print("Saved board")
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except Exception as e:
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print(f"SES import error: {{e}}")
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'''
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return run_pcbnew_script(script)
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def run_drc():
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"""Run DRC using kicad-cli."""
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print("Running DRC...")
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result = subprocess.run(
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["kicad-cli", "pcb", "drc",
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"--severity-all",
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"--units", "mm",
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"-o", DRC_FILE,
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PCB_FILE],
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capture_output=True,
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text=True
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)
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print(result.stdout)
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# Count errors
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if os.path.exists(DRC_FILE):
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with open(DRC_FILE) as f:
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content = f.read()
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errors = content.count('; error')
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warnings = content.count('; warning')
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print(f"DRC: {errors} errors, {warnings} warnings")
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return errors == 0
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return False
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def main():
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print("=" * 50)
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print("SN-L00 Headless Autoroute Pipeline")
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print("=" * 50)
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check_dependencies()
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download_freerouting()
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print("\n[1/4] Placing components and exporting DSN...")
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if not place_and_export():
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print("Failed to place/export")
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# Fall back to manual DSN check
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if not os.path.exists(DSN_FILE):
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print(f"ERROR: {DSN_FILE} not found")
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print("Export manually: File → Export → Specctra DSN")
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sys.exit(1)
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print("\n[2/4] Running Freerouting...")
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if not run_freerouting():
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print("Freerouting failed")
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sys.exit(1)
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print("\n[3/4] Importing routed session...")
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if not import_ses():
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print("SES import failed - import manually in KiCad")
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print("\n[4/4] Running DRC...")
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success = run_drc()
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print("\n" + "=" * 50)
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if success:
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print("SUCCESS! Board routed with no DRC errors.")
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else:
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print("Done. Check DRC.rpt for remaining issues.")
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print("=" * 50)
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if __name__ == "__main__":
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main()
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