Fix PCB file format and add placement script

- Fixed KiCad 8 PCB file format (text rotation syntax) - PCB now loads correctly with board outline and labels - Added Python placement script for KiCad scripting console - Updated PCB_LAYOUT.md with quick start instructions Next step: Open in KiCad, run Update PCB from Schematic, then use Freerouting or manual routing to complete traces.
2026-01-23 05:36:14 +01:00
parent c625b426b8
commit a8e63aa45c
3 changed files with 179 additions and 491 deletions
@@ -0,0 +1,124 @@
+#!/usr/bin/env python3
+"""
+KiCad PCB Component Placement Script for SN-L00
+
+Run this script in KiCad's Scripting Console (Tools > Scripting Console)
+after running "Update PCB from Schematic" to place all components.
+
+Usage in KiCad scripting console:
+    exec(open('/path/to/place_components.py').read())
+"""
+
+import pcbnew
+
+# Component placement coordinates (mm) based on CPL_PCBWay.csv
+# Format: {Reference: (x, y, rotation, layer)}
+# Layer: "F.Cu" for top, "B.Cu" for bottom
+
+PLACEMENTS = {
+    # Capacitors
+    "C1": (10.0, 60.0, 0, "F.Cu"),
+    "C2": (18.0, 60.0, 0, "F.Cu"),
+    "C3": (21.0, 60.0, 0, "F.Cu"),
+    "C4": (7.0, 68.0, 0, "F.Cu"),
+    "C5": (21.0, 68.0, 0, "F.Cu"),
+
+    # Resistors
+    "R1": (10.0, 35.0, 0, "F.Cu"),
+    "R2": (24.0, 36.0, 90, "F.Cu"),
+    "R3": (7.0, 76.0, 90, "F.Cu"),
+    "R4": (21.0, 76.0, 90, "F.Cu"),
+    "R5": (18.0, 76.0, 90, "F.Cu"),
+    "R6": (18.0, 72.0, 90, "F.Cu"),
+
+    # Diodes
+    "D1": (7.0, 65.0, 0, "B.Cu"),  # Bottom layer
+    "D2": (24.0, 31.5, 90, "F.Cu"),
+    "D3": (24.0, 70.0, 90, "F.Cu"),
+    "D4": (24.0, 74.0, 90, "F.Cu"),
+
+    # ICs
+    "U1": (14.0, 65.0, 0, "B.Cu"),  # LDO on bottom
+    "U2": (7.0, 72.0, 0, "F.Cu"),   # Schmitt trigger
+    "U3": (21.0, 72.0, 0, "F.Cu"),  # Op-amp
+
+    # Connectors
+    "J1": (14.0, 92.0, 0, "F.Cu"),  # Power header
+    "J2": (7.0, 83.0, 0, "F.Cu"),   # TRIG jack
+    "J3": (21.0, 83.0, 0, "F.Cu"),  # RETURN jack
+
+    # Switch
+    "SW1": (14.0, 31.5, 0, "F.Cu"),
+
+    # Modules (hand-solder, placement reference only)
+    "MOD1": (14.0, 46.5, 0, "F.Cu"),  # RP2040-Zero
+    "MOD2": (14.0, 17.5, 0, "F.Cu"),  # OLED
+}
+
+def place_components():
+    """Place all components according to the PLACEMENTS dictionary."""
+    board = pcbnew.GetBoard()
+
+    if not board:
+        print("Error: No board loaded!")
+        return
+
+    placed = 0
+    not_found = []
+
+    for ref, (x, y, rotation, layer) in PLACEMENTS.items():
+        # Find the footprint by reference
+        fp = board.FindFootprintByReference(ref)
+
+        if fp is None:
+            not_found.append(ref)
+            continue
+
+        # Convert mm to internal units (nanometers)
+        pos = pcbnew.VECTOR2I(pcbnew.FromMM(x), pcbnew.FromMM(y))
+        fp.SetPosition(pos)
+
+        # Set rotation (in tenths of degrees)
+        fp.SetOrientationDegrees(rotation)
+
+        # Set layer (flip if on bottom)
+        if layer == "B.Cu" and fp.GetLayer() == pcbnew.F_Cu:
+            fp.Flip(pos, False)
+        elif layer == "F.Cu" and fp.GetLayer() == pcbnew.B_Cu:
+            fp.Flip(pos, False)
+
+        placed += 1
+        print(f"Placed {ref} at ({x}, {y}) rot={rotation}° on {layer}")
+
+    if not_found:
+        print(f"\nNot found (run 'Update PCB from Schematic' first): {not_found}")
+
+    print(f"\nPlaced {placed}/{len(PLACEMENTS)} components")
+
+    # Refresh the board view
+    pcbnew.Refresh()
+
+
+def add_mounting_holes():
+    """Add M3 mounting holes at standard Eurorack positions."""
+    board = pcbnew.GetBoard()
+
+    # Check if mounting holes already exist
+    for fp in board.GetFootprints():
+        if "MountingHole" in fp.GetValue():
+            print("Mounting holes already exist, skipping...")
+            return
+
+    # Would need to load footprint from library - simplified for this script
+    print("Add mounting holes manually:")
+    print("  MH1: (14, 5) - Top")
+    print("  MH2: (14, 95) - Bottom")
+    print("  Footprint: MountingHole:MountingHole_3.2mm_M3")
+
+
+if __name__ == "__main__":
+    print("SN-L00 Component Placement Script")
+    print("=" * 40)
+    place_components()
+    add_mounting_holes()
+    print("\nDone! Run DRC and then route traces.")