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2026-06-11 18:30:03 +02:00
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#!/usr/bin/env bash
# export_for_msla.sh — KiCad Gerber export + pm4n generation for Anycubic Photon Mono 4
#
# Usage:
# ./export_for_msla.sh [OPTIONS] <path/to/board.kicad_pcb>
#
# Options:
# --layers LAYER,LAYER,... KiCad layer names to export (default: F.Cu)
# --invert LAYER,LAYER,... Layers to invert (comma-separated)
# --mirror LAYER,LAYER,... Layers to mirror (comma-separated)
# --exposure SECONDS Exposure time in seconds (default: 60)
# --dummy FILE Dummy .pm4n template (default: Dummy.pm4n beside this script)
# --out DIR Output directory (default: ./output)
# --dpmm N Render resolution in dots/mm (default: native 58.824)
# --pos X,Y Board position on LCD in mm (default: centred)
# --preview-scale N Downsample preview PNG by N (default: 1 = full resolution)
# --verbose Print detailed progress
# -h, --help Show this help
#
# Normal output: one output filepath per layer.
# Verbose output: full progress from KiCad and the converter.
#
# Example:
# ./export_for_msla.sh --invert F.Cu,B.Mask --mirror F.Cu,F.Mask panel/board.kicad_pcb
#
# KiCad layer name → Gerber filename stem:
# F.Cu → F_Cu B.Cu → B_Cu
# F.Mask → F_Mask B.Mask → B_Mask
# F.SilkS → F_Silkscreen B.SilkS → B_Silkscreen
# F.Paste → F_Paste B.Paste → B_Paste
# Edge.Cuts → Edge_Cuts
# Front → Front Back → Back
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PYTHON="${PYTHON:-python3}"
CONVERTER="$SCRIPT_DIR/gerber_to_pm4n.py"
# ---- defaults ----
LAYERS="F.Cu"
INVERT_LAYERS=""
MIRROR_LAYERS=""
EXPOSURE="60"
DUMMY="$SCRIPT_DIR/Dummy.pm4n"
OUT_DIR="./output"
DPMM=""
POS=""
VERBOSE=0
PREVIEW_SCALE=""
# ---- helpers ----
usage() {
grep '^#' "$0" | sed 's/^# \{0,1\}//'
exit 0
}
log() { [[ $VERBOSE -eq 1 ]] && echo "$@" || true; }
contains() {
local list="$1" item="$2"
echo "$list" | tr ',' '\n' | grep -qx "$item"
}
layer_to_filename() {
case "$1" in
F.Cu) echo "Front" ;;
B.Cu) echo "Back" ;;
F.SilkS) echo "F_Silkscreen" ;;
B.SilkS) echo "B_Silkscreen" ;;
Edge.Cuts) echo "Edge_Cuts" ;;
*) echo "${1//./_}" ;;
esac
}
# ---- parse arguments ----
PCB_FILE=""
while [[ $# -gt 0 ]]; do
case "$1" in
--layers) LAYERS="$2"; shift 2 ;;
--invert) INVERT_LAYERS="$2"; shift 2 ;;
--mirror) MIRROR_LAYERS="$2"; shift 2 ;;
--exposure) EXPOSURE="$2"; shift 2 ;;
--dummy) DUMMY="$2"; shift 2 ;;
--out) OUT_DIR="$2"; shift 2 ;;
--dpmm) DPMM="$2"; shift 2 ;;
--pos) POS="$2"; shift 2 ;;
--preview-scale) PREVIEW_SCALE="$2"; shift 2 ;;
--verbose) VERBOSE=1; shift ;;
-h|--help) usage ;;
-*) echo "ERROR: unknown option: $1" >&2; exit 1 ;;
*) PCB_FILE="$1"; shift ;;
esac
done
[[ -z "$PCB_FILE" ]] && { echo "ERROR: no .kicad_pcb file specified" >&2; exit 1; }
[[ ! -f "$PCB_FILE" ]] && { echo "ERROR: file not found: $PCB_FILE" >&2; exit 1; }
[[ ! -f "$DUMMY" ]] && { echo "ERROR: Dummy.pm4n not found: $DUMMY" >&2; exit 1; }
BOARD_NAME="$(basename "$PCB_FILE" .kicad_pcb)"
GERBERS_DIR="$OUT_DIR/gerbers"
PM4N_DIR="$OUT_DIR/pm4n"
mkdir -p "$GERBERS_DIR" "$PM4N_DIR"
# ---- Step 1: export Gerbers ----
log "=== Exporting Gerbers ==="
log " Board: $PCB_FILE"
log " Layers: $LAYERS"
kicad-cli pcb export gerbers \
--output "$GERBERS_DIR" \
--layers "$LAYERS" \
--no-protel-ext \
--subtract-soldermask \
--no-netlist \
"$PCB_FILE" \
2>/dev/null
log ""
# ---- Step 2: convert to pm4n ----
log "=== Converting to .pm4n ==="
IFS=',' read -ra LAYER_LIST <<< "$LAYERS"
for LAYER in "${LAYER_LIST[@]}"; do
LAYER_STEM="$(layer_to_filename "$LAYER")"
GBR_FILE="$GERBERS_DIR/${BOARD_NAME}-${LAYER_STEM}.gbr"
if [[ ! -f "$GBR_FILE" ]]; then
echo "WARNING: Gerber not found for layer $LAYER (expected: $GBR_FILE)" >&2
continue
fi
OUT_PM4N="$PM4N_DIR/${BOARD_NAME}-${LAYER_STEM}.pm4n"
FLAGS=()
contains "$INVERT_LAYERS" "$LAYER" && FLAGS+=(--invert)
contains "$MIRROR_LAYERS" "$LAYER" && FLAGS+=(--mirror)
[[ -n "$DPMM" ]] && FLAGS+=(--dpmm "$DPMM")
[[ -n "$POS" ]] && FLAGS+=(--pos "$POS")
[[ -n "$PREVIEW_SCALE" ]] && FLAGS+=(--preview-scale "$PREVIEW_SCALE")
[[ $VERBOSE -eq 1 ]] && FLAGS+=(--verbose)
log " $LAYER$OUT_PM4N [${FLAGS[*]:-} exposure=${EXPOSURE}s]"
"$PYTHON" "$CONVERTER" \
"$DUMMY" \
"$GBR_FILE" \
--output "$OUT_PM4N" \
--exposure "$EXPOSURE" \
"${FLAGS[@]}"
done
log "=== Done ==="