750dd260c4
- Implement schematic netlist parser with S-expression parsing - Create netlist tools for extraction and connection analysis - Add resources for netlist and component connection reporting - Include documentation with usage guide and troubleshooting - Register new tools and resources in server configuration This enables extracting component connections from KiCad schematics and analyzing connectivity between components.
454 lines
16 KiB
Python
454 lines
16 KiB
Python
"""
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KiCad schematic netlist extraction utilities.
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"""
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import os
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import re
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from typing import Dict, List, Set, Tuple, Any, Optional
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from collections import defaultdict
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from kicad_mcp.utils.logger import Logger
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# Create logger for this module
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logger = Logger()
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class SchematicParser:
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"""Parser for KiCad schematic files to extract netlist information."""
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def __init__(self, schematic_path: str):
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"""Initialize the schematic parser.
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Args:
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schematic_path: Path to the KiCad schematic file (.kicad_sch)
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"""
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self.schematic_path = schematic_path
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self.content = ""
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self.components = []
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self.labels = []
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self.wires = []
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self.junctions = []
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self.no_connects = []
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self.power_symbols = []
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self.hierarchical_labels = []
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self.global_labels = []
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# Netlist information
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self.nets = defaultdict(list) # Net name -> connected pins
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self.component_pins = {} # (component_ref, pin_num) -> net_name
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# Component information
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self.component_info = {} # component_ref -> component details
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# Load the file
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self._load_schematic()
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def _load_schematic(self) -> None:
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"""Load the schematic file content."""
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if not os.path.exists(self.schematic_path):
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logger.error(f"Schematic file not found: {self.schematic_path}")
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raise FileNotFoundError(f"Schematic file not found: {self.schematic_path}")
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try:
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with open(self.schematic_path, 'r') as f:
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self.content = f.read()
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logger.info(f"Successfully loaded schematic: {self.schematic_path}")
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except Exception as e:
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logger.error(f"Error reading schematic file: {str(e)}")
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raise
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def parse(self) -> Dict[str, Any]:
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"""Parse the schematic to extract netlist information.
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Returns:
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Dictionary with parsed netlist information
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"""
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logger.info("Starting schematic parsing")
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# Extract symbols (components)
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self._extract_components()
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# Extract wires
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self._extract_wires()
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# Extract junctions
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self._extract_junctions()
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# Extract labels
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self._extract_labels()
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# Extract power symbols
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self._extract_power_symbols()
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# Extract no-connects
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self._extract_no_connects()
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# Build netlist
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self._build_netlist()
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# Create result
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result = {
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"components": self.component_info,
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"nets": dict(self.nets),
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"labels": self.labels,
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"wires": self.wires,
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"junctions": self.junctions,
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"power_symbols": self.power_symbols,
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"component_count": len(self.component_info),
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"net_count": len(self.nets)
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}
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logger.info(f"Schematic parsing complete: found {len(self.component_info)} components and {len(self.nets)} nets")
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return result
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def _extract_s_expressions(self, pattern: str) -> List[str]:
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"""Extract all matching S-expressions from the schematic content.
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Args:
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pattern: Regex pattern to match the start of S-expressions
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Returns:
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List of matching S-expressions
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"""
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matches = []
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positions = []
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# Find all starting positions of matches
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for match in re.finditer(pattern, self.content):
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positions.append(match.start())
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# Extract full S-expressions for each match
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for pos in positions:
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# Start from the matching position
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current_pos = pos
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depth = 0
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s_exp = ""
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# Extract the full S-expression by tracking parentheses
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while current_pos < len(self.content):
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char = self.content[current_pos]
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s_exp += char
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if char == '(':
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depth += 1
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elif char == ')':
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depth -= 1
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if depth == 0:
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# Found the end of the S-expression
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break
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current_pos += 1
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matches.append(s_exp)
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return matches
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def _extract_components(self) -> None:
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"""Extract component information from schematic."""
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logger.info("Extracting components")
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# Extract all symbol expressions (components)
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symbols = self._extract_s_expressions(r'\(symbol\s+')
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for symbol in symbols:
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component = self._parse_component(symbol)
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if component:
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self.components.append(component)
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# Add to component info dictionary
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ref = component.get('reference', 'Unknown')
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self.component_info[ref] = component
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logger.info(f"Extracted {len(self.components)} components")
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def _parse_component(self, symbol_expr: str) -> Dict[str, Any]:
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"""Parse a component from a symbol S-expression.
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Args:
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symbol_expr: Symbol S-expression
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Returns:
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Component information dictionary
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"""
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component = {}
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# Extract library component ID
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lib_id_match = re.search(r'\(lib_id\s+"([^"]+)"\)', symbol_expr)
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if lib_id_match:
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component['lib_id'] = lib_id_match.group(1)
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# Extract reference (e.g., R1, C2)
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property_matches = re.finditer(r'\(property\s+"([^"]+)"\s+"([^"]+)"', symbol_expr)
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for match in property_matches:
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prop_name = match.group(1)
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prop_value = match.group(2)
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if prop_name == "Reference":
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component['reference'] = prop_value
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elif prop_name == "Value":
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component['value'] = prop_value
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elif prop_name == "Footprint":
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component['footprint'] = prop_value
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else:
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# Store other properties
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if 'properties' not in component:
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component['properties'] = {}
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component['properties'][prop_name] = prop_value
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# Extract position
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pos_match = re.search(r'\(at\s+([\d\.-]+)\s+([\d\.-]+)(\s+[\d\.-]+)?\)', symbol_expr)
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if pos_match:
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component['position'] = {
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'x': float(pos_match.group(1)),
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'y': float(pos_match.group(2)),
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'angle': float(pos_match.group(3).strip() if pos_match.group(3) else 0)
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}
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# Extract pins
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pins = []
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pin_matches = re.finditer(r'\(pin\s+\(num\s+"([^"]+)"\)\s+\(name\s+"([^"]+)"\)', symbol_expr)
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for match in pin_matches:
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pin_num = match.group(1)
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pin_name = match.group(2)
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pins.append({
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'num': pin_num,
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'name': pin_name
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})
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if pins:
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component['pins'] = pins
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return component
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def _extract_wires(self) -> None:
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"""Extract wire information from schematic."""
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logger.info("Extracting wires")
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# Extract all wire expressions
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wires = self._extract_s_expressions(r'\(wire\s+')
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for wire in wires:
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# Extract the wire coordinates
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pts_match = re.search(r'\(pts\s+\(xy\s+([\d\.-]+)\s+([\d\.-]+)\)\s+\(xy\s+([\d\.-]+)\s+([\d\.-]+)\)\)', wire)
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if pts_match:
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self.wires.append({
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'start': {
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'x': float(pts_match.group(1)),
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'y': float(pts_match.group(2))
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},
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'end': {
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'x': float(pts_match.group(3)),
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'y': float(pts_match.group(4))
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}
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})
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logger.info(f"Extracted {len(self.wires)} wires")
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def _extract_junctions(self) -> None:
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"""Extract junction information from schematic."""
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logger.info("Extracting junctions")
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# Extract all junction expressions
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junctions = self._extract_s_expressions(r'\(junction\s+')
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for junction in junctions:
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# Extract the junction coordinates
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xy_match = re.search(r'\(junction\s+\(xy\s+([\d\.-]+)\s+([\d\.-]+)\)\)', junction)
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if xy_match:
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self.junctions.append({
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'x': float(xy_match.group(1)),
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'y': float(xy_match.group(2))
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})
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logger.info(f"Extracted {len(self.junctions)} junctions")
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def _extract_labels(self) -> None:
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"""Extract label information from schematic."""
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logger.info("Extracting labels")
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# Extract local labels
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local_labels = self._extract_s_expressions(r'\(label\s+')
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for label in local_labels:
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# Extract label text and position
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label_match = re.search(r'\(label\s+"([^"]+)"\s+\(at\s+([\d\.-]+)\s+([\d\.-]+)(\s+[\d\.-]+)?\)', label)
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if label_match:
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self.labels.append({
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'type': 'local',
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'text': label_match.group(1),
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'position': {
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'x': float(label_match.group(2)),
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'y': float(label_match.group(3)),
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'angle': float(label_match.group(4).strip() if label_match.group(4) else 0)
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}
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})
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# Extract global labels
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global_labels = self._extract_s_expressions(r'\(global_label\s+')
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for label in global_labels:
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# Extract global label text and position
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label_match = re.search(r'\(global_label\s+"([^"]+)"\s+\(shape\s+([^\s\)]+)\)\s+\(at\s+([\d\.-]+)\s+([\d\.-]+)(\s+[\d\.-]+)?\)', label)
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if label_match:
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self.global_labels.append({
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'type': 'global',
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'text': label_match.group(1),
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'shape': label_match.group(2),
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'position': {
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'x': float(label_match.group(3)),
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'y': float(label_match.group(4)),
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'angle': float(label_match.group(5).strip() if label_match.group(5) else 0)
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}
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})
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# Extract hierarchical labels
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hierarchical_labels = self._extract_s_expressions(r'\(hierarchical_label\s+')
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for label in hierarchical_labels:
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# Extract hierarchical label text and position
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label_match = re.search(r'\(hierarchical_label\s+"([^"]+)"\s+\(shape\s+([^\s\)]+)\)\s+\(at\s+([\d\.-]+)\s+([\d\.-]+)(\s+[\d\.-]+)?\)', label)
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if label_match:
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self.hierarchical_labels.append({
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'type': 'hierarchical',
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'text': label_match.group(1),
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'shape': label_match.group(2),
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'position': {
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'x': float(label_match.group(3)),
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'y': float(label_match.group(4)),
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'angle': float(label_match.group(5).strip() if label_match.group(5) else 0)
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}
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})
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logger.info(f"Extracted {len(self.labels)} local labels, {len(self.global_labels)} global labels, and {len(self.hierarchical_labels)} hierarchical labels")
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def _extract_power_symbols(self) -> None:
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"""Extract power symbol information from schematic."""
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logger.info("Extracting power symbols")
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# Extract all power symbol expressions
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power_symbols = self._extract_s_expressions(r'\(symbol\s+\(lib_id\s+"power:')
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for symbol in power_symbols:
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# Extract power symbol type and position
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type_match = re.search(r'\(lib_id\s+"power:([^"]+)"\)', symbol)
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pos_match = re.search(r'\(at\s+([\d\.-]+)\s+([\d\.-]+)(\s+[\d\.-]+)?\)', symbol)
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if type_match and pos_match:
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self.power_symbols.append({
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'type': type_match.group(1),
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'position': {
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'x': float(pos_match.group(1)),
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'y': float(pos_match.group(2)),
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'angle': float(pos_match.group(3).strip() if pos_match.group(3) else 0)
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}
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})
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logger.info(f"Extracted {len(self.power_symbols)} power symbols")
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def _extract_no_connects(self) -> None:
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"""Extract no-connect information from schematic."""
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logger.info("Extracting no-connects")
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# Extract all no-connect expressions
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no_connects = self._extract_s_expressions(r'\(no_connect\s+')
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for no_connect in no_connects:
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# Extract the no-connect coordinates
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xy_match = re.search(r'\(no_connect\s+\(at\s+([\d\.-]+)\s+([\d\.-]+)\)', no_connect)
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if xy_match:
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self.no_connects.append({
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'x': float(xy_match.group(1)),
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'y': float(xy_match.group(2))
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})
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logger.info(f"Extracted {len(self.no_connects)} no-connects")
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def _build_netlist(self) -> None:
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"""Build the netlist from extracted components and connections."""
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logger.info("Building netlist from schematic data")
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# TODO: Implement netlist building algorithm
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# This is a complex task that involves:
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# 1. Tracking connections between components via wires
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# 2. Handling labels (local, global, hierarchical)
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# 3. Processing power symbols
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# 4. Resolving junctions
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# For now, we'll implement a basic version that creates a list of nets
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# based on component references and pin numbers
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# Process global labels as nets
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for label in self.global_labels:
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net_name = label['text']
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self.nets[net_name] = [] # Initialize empty list for this net
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# Process power symbols as nets
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for power in self.power_symbols:
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net_name = power['type']
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if net_name not in self.nets:
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self.nets[net_name] = []
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# In a full implementation, we would now trace connections between
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# components, but that requires a more complex algorithm to follow wires
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# and detect connected pins
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# For demonstration, we'll add a placeholder note
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logger.info("Note: Full netlist building requires complex connectivity tracing")
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logger.info(f"Found {len(self.nets)} potential nets from labels and power symbols")
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def extract_netlist(schematic_path: str) -> Dict[str, Any]:
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"""Extract netlist information from a KiCad schematic file.
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Args:
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schematic_path: Path to the KiCad schematic file (.kicad_sch)
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Returns:
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Dictionary with netlist information
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"""
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try:
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parser = SchematicParser(schematic_path)
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return parser.parse()
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except Exception as e:
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logger.error(f"Error extracting netlist: {str(e)}")
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return {
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"error": str(e),
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"components": {},
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"nets": {},
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"component_count": 0,
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"net_count": 0
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}
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def analyze_netlist(netlist_data: Dict[str, Any]) -> Dict[str, Any]:
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"""Analyze netlist data to provide insights.
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Args:
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netlist_data: Dictionary with netlist information
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Returns:
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Dictionary with analysis results
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"""
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results = {
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"component_count": netlist_data.get("component_count", 0),
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"net_count": netlist_data.get("net_count", 0),
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"component_types": defaultdict(int),
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"power_nets": []
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}
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# Analyze component types
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for ref, component in netlist_data.get("components", {}).items():
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# Extract component type from reference (e.g., R1 -> R)
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comp_type = re.match(r'^([A-Za-z_]+)', ref)
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if comp_type:
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results["component_types"][comp_type.group(1)] += 1
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# Identify power nets
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for net_name in netlist_data.get("nets", {}):
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if any(net_name.startswith(prefix) for prefix in ["VCC", "VDD", "GND", "+5V", "+3V3", "+12V"]):
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results["power_nets"].append(net_name)
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# Count pin connections
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total_pins = sum(len(pins) for pins in netlist_data.get("nets", {}).values())
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results["total_pin_connections"] = total_pins
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return results
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