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-rwxr-xr-xgerber/excellon.py452
1 files changed, 316 insertions, 136 deletions
diff --git a/gerber/excellon.py b/gerber/excellon.py
index 1e746ad..9d09576 100755
--- a/gerber/excellon.py
+++ b/gerber/excellon.py
@@ -2,7 +2,7 @@
# -*- coding: utf-8 -*-
# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
-
+
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
@@ -13,138 +13,229 @@
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
-# limitations under the License.
-
-
-import re
-from itertools import tee, izip
-from .utils import parse_gerber_value
-
-
-
-
-class Tool(object):
-
- @classmethod
- def from_line(cls, line, settings):
- commands = re.split('([BCFHSTZ])', line)[1:]
- commands = [(command, value) for command, value in pairwise(commands)]
- args = {}
- format = settings['format']
- zero_suppression = settings['zero_suppression']
- for cmd, val in commands:
- if cmd == 'B':
- args['retract_rate'] = parse_gerber_value(val, format, zero_suppression)
- elif cmd == 'C':
- args['diameter'] = parse_gerber_value(val, format, zero_suppression)
- elif cmd == 'F':
- args['feed_rate'] = parse_gerber_value(val, format, zero_suppression)
- elif cmd == 'H':
- args['max_hit_count'] = parse_gerber_value(val, format, zero_suppression)
- elif cmd == 'S':
- args['rpm'] = 1000 * parse_gerber_value(val, format, zero_suppression)
- elif cmd == 'T':
- args['number'] = int(val)
- elif cmd == 'Z':
- args['depth_offset'] = parse_gerber_value(val, format, zero_suppression)
- return cls(settings, **args)
-
- def __init__(self, settings, **kwargs):
- self.number = kwargs.get('number')
- self.feed_rate = kwargs.get('feed_rate')
- self.retract_rate = kwargs.get('retract_rate')
- self.rpm = kwargs.get('rpm')
- self.diameter = kwargs.get('diameter')
- self.max_hit_count = kwargs.get('max_hit_count')
- self.depth_offset = kwargs.get('depth_offset')
- self.units = settings.get('units', 'inch')
-
- def __repr__(self):
- unit = 'in.' if self.units == 'inch' else 'mm'
- return '<Tool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
-
+# limitations under the License.
+
+"""
+Excellon File module
+====================
+**Excellon file classes**
+
+This module provides Excellon file classes and parsing utilities
+"""
+
+
+from .excellon_statements import *
+from .cam import CamFile, FileSettings
+from .primitives import Drill
+import math
+
+def read(filename):
+ """ Read data from filename and return an ExcellonFile
+ Parameters
+ ----------
+ filename : string
+ Filename of file to parse
+
+ Returns
+ -------
+ file : :class:`gerber.excellon.ExcellonFile`
+ An ExcellonFile created from the specified file.
+
+ """
+ detected_settings = detect_excellon_format(filename)
+ settings = FileSettings(**detected_settings)
+ zeros = ''
+ return ExcellonParser(settings).parse(filename)
+
+
+class ExcellonFile(CamFile):
+ """ A class representing a single excellon file
+
+ The ExcellonFile class represents a single excellon file.
+
+ Parameters
+ ----------
+ tools : list
+ list of gerber file statements
+
+ hits : list of tuples
+ list of drill hits as (<Tool>, (x, y))
+ settings : dict
+ Dictionary of gerber file settings
+
+ filename : string
+ Filename of the source gerber file
+
+ Attributes
+ ----------
+ units : string
+ either 'inch' or 'metric'.
+
+ """
+ def __init__(self, statements, tools, hits, settings, filename=None):
+ super(ExcellonFile, self).__init__(statements=statements,
+ settings=settings,
+ filename=filename)
+ self.tools = tools
+ self.hits = hits
+ self.primitives = [Drill(position, tool.diameter)
+ for tool, position in self.hits]
+
+ @property
+ def bounds(self):
+ xmin = ymin = 100000000000
+ xmax = ymax = -100000000000
+ for tool, position in self.hits:
+ radius = tool.diameter / 2.
+ x = position[0]
+ y = position[1]
+ xmin = min(x - radius, xmin)
+ xmax = max(x + radius, xmax)
+ ymin = min(y - radius, ymin)
+ ymax = max(y + radius, ymax)
+ return ((xmin, xmax), (ymin, ymax))
+
+ def report(self):
+ """ Print drill report
+ """
+ pass
+
+
+ def write(self, filename):
+ with open(filename, 'w') as f:
+ for statement in self.statements:
+ f.write(statement.to_excellon() + '\n')
class ExcellonParser(object):
- def __init__(self, ctx=None):
- self.ctx=ctx
+ """ Excellon File Parser
+
+ Parameters
+ ----------
+ settings : FileSettings or dict-like
+ Excellon file settings to use when interpreting the excellon file.
+ """
+ def __init__(self, settings=None):
self.notation = 'absolute'
self.units = 'inch'
self.zero_suppression = 'trailing'
- self.format = (2,5)
+ self.format = (2, 5)
self.state = 'INIT'
+ self.statements = []
self.tools = {}
self.hits = []
self.active_tool = None
- self.pos = [0., 0.]
- if ctx is not None:
- zeros = 'L' if self.zero_suppression == 'leading' else 'T'
- x = self.format
- y = self.format
- self.ctx.set_coord_format(zeros, x, y)
+ self.pos = [0., 0.]
+ if settings is not None:
+ self.units = settings.units
+ self.zero_suppression = settings.zero_suppression
+ self.notation = settings.notation
+ self.format = settings.format
+
+
+ @property
+ def coordinates(self):
+ return [(stmt.x, stmt.y) for stmt in self.statements if isinstance(stmt, CoordinateStmt)]
+
+ @property
+ def bounds(self):
+ xmin = ymin = 100000000000
+ xmax = ymax = -100000000000
+ for x, y in self.coordinates:
+ if x is not None:
+ xmin = x if x < xmin else xmin
+ xmax = x if x > xmax else xmax
+ if y is not None:
+ ymin = y if y < ymin else ymin
+ ymax = y if y > ymax else ymax
+ return ((xmin, xmax), (ymin, ymax))
+
+ @property
+ def hole_sizes(self):
+ return [stmt.diameter for stmt in self.statements if isinstance(stmt, ExcellonTool)]
+
+ @property
+ def hole_count(self):
+ return len(self.hits)
+
def parse(self, filename):
with open(filename, 'r') as f:
for line in f:
- self._parse(line)
-
- def dump(self, filename='teste.svg'):
- if self.ctx is not None:
- self.ctx.dump(filename)
-
+ self._parse(line.strip())
+ return ExcellonFile(self.statements, self.tools, self.hits,
+ self._settings(), filename)
+
def _parse(self, line):
- if 'M48' in line:
+ #line = line.strip()
+ zs = self._settings().zero_suppression
+ fmt = self._settings().format
+ if line[0] == ';':
+ self.statements.append(CommentStmt.from_excellon(line))
+
+ elif line[:3] == 'M48':
+ self.statements.append(HeaderBeginStmt())
self.state = 'HEADER'
-
- if 'G00' in line:
+
+ elif line[0] == '%':
+ self.statements.append(RewindStopStmt())
+ if self.state == 'HEADER':
+ self.state = 'DRILL'
+
+ elif line[:3] == 'M95':
+ self.statements.append(HeaderEndStmt())
+ if self.state == 'HEADER':
+ self.state = 'DRILL'
+
+ elif line[:3] == 'M30':
+ stmt = EndOfProgramStmt.from_excellon(line)
+ self.statements.append(stmt)
+
+ elif line[:3] == 'G00':
self.state = 'ROUT'
-
- if 'G05' in line:
- self.state = 'DRILL'
-
- elif line[0] == '%' and self.state == 'HEADER':
+
+ elif line[:3] == 'G05':
self.state = 'DRILL'
-
- if 'INCH' in line or line.strip() == 'M72':
- self.units = 'inch'
-
- elif 'METRIC' in line or line.strip() == 'M71':
- self.units = 'metric'
-
- if 'LZ' in line:
- self.zero_suppression = 'trailing'
-
- elif 'TZ' in line:
- self.zero_suppression = 'leading'
-
- if 'ICI' in line and 'ON' in line or line.strip() == 'G91':
- self.notation = 'incremental'
-
- if 'ICI' in line and 'OFF' in line or line.strip() == 'G90':
- self.notation = 'absolute'
-
- zs = self._settings()['zero_suppression']
- fmt = self._settings()['format']
-
- # tool definition
- if line[0] == 'T' and self.state == 'HEADER':
- tool = Tool.from_line(line,self._settings())
+
+ elif (('INCH' in line or 'METRIC' in line) and
+ ('LZ' in line or 'TZ' in line)):
+ stmt = UnitStmt.from_excellon(line)
+ self.units = stmt.units
+ self.zero_suppression = stmt.zero_suppression
+ self.statements.append(stmt)
+
+ elif line[:3] == 'M71' or line [:3] == 'M72':
+ stmt = MeasuringModeStmt.from_excellon(line)
+ self.units = stmt.units
+ self.statements.append(stmt)
+
+ elif line[:3] == 'ICI':
+ stmt = IncrementalModeStmt.from_excellon(line)
+ self.notation = 'incremental' if stmt.mode == 'on' else 'absolute'
+ self.statements.append(stmt)
+
+ elif line[:3] == 'VER':
+ stmt = VersionStmt.from_excellon(line)
+ self.statements.append(stmt)
+
+ elif line[:4] == 'FMAT':
+ stmt = FormatStmt.from_excellon(line)
+ self.statements.append(stmt)
+
+ elif line[0] == 'T' and self.state == 'HEADER':
+ tool = ExcellonTool.from_excellon(line, self._settings())
self.tools[tool.number] = tool
-
+ self.statements.append(tool)
+
elif line[0] == 'T' and self.state != 'HEADER':
- self.active_tool = self.tools[int(line.strip().split('T')[1])]
-
-
- if line[0] in ['X', 'Y']:
- x = None
- y = None
- if line[0] == 'X':
- splitline = line.strip('X').split('Y')
- x = parse_gerber_value(splitline[0].strip(), fmt, zs)
- if len(splitline) == 2:
- y = parse_gerber_value(splitline[1].strip(), fmt,zs)
- else:
- y = parse_gerber_value(line.strip(' Y'), fmt,zs)
-
+ stmt = ToolSelectionStmt.from_excellon(line)
+ self.active_tool = self.tools[stmt.tool]
+ self.statements.append(stmt)
+
+ elif line[0] in ['X', 'Y']:
+ stmt = CoordinateStmt.from_excellon(line, fmt, zs)
+ x = stmt.x
+ y = stmt.y
+ self.statements.append(stmt)
if self.notation == 'absolute':
if x is not None:
self.pos[0] = x
@@ -155,26 +246,115 @@ class ExcellonParser(object):
self.pos[0] += x
if y is not None:
self.pos[1] += y
- if self.state == 'DRILL':
- self.hits.append((self.active_tool, self.pos))
- if self.ctx is not None:
- self.ctx.drill(self.pos[0], self.pos[1],
- self.active_tool.diameter)
-
+ if self.state == 'DRILL':
+ self.hits.append((self.active_tool, tuple(self.pos)))
+ self.active_tool._hit()
+ else:
+ self.statements.append(UnknownStmt.from_excellon(line))
+
def _settings(self):
- return {'units':self.units, 'zero_suppression':self.zero_suppression,
- 'format': self.format}
-
-def pairwise(iterator):
- itr = iter(iterator)
- while True:
- yield tuple([itr.next() for i in range(2)])
-
-if __name__ == '__main__':
- from .render_svg import GerberSvgContext
- tools = []
- p = ExcellonParser(GerberSvgContext())
- p.parse('examples/ncdrill.txt')
- p.dump('excellon.svg')
-
- \ No newline at end of file
+ return FileSettings(units=self.units, format=self.format,
+ zero_suppression=self.zero_suppression,
+ notation=self.notation)
+
+
+def detect_excellon_format(filename):
+ """ Detect excellon file decimal format and zero-suppression settings.
+
+ Parameters
+ ----------
+ filename : string
+ Name of the file to parse. This does not check if the file is actually
+ an Excellon file, so do that before calling this.
+
+ Returns
+ -------
+ settings : dict
+ Detected excellon file settings. Keys are
+ - `format`: decimal format as tuple (<int part>, <decimal part>)
+ - `zero_suppression`: zero suppression, 'leading' or 'trailing'
+ """
+ results = {}
+ detected_zeros = None
+ detected_format = None
+ zs_options = ('leading', 'trailing', )
+ format_options = ((2, 4), (2, 5), (3, 3),)
+
+ # Check for obvious clues:
+ p = ExcellonParser()
+ p.parse(filename)
+
+ # Get zero_suppression from a unit statement
+ zero_statements = [stmt.zero_suppression for stmt in p.statements
+ if isinstance(stmt, UnitStmt)]
+
+ # get format from altium comment
+ format_comment = [stmt.comment for stmt in p.statements
+ if isinstance(stmt, CommentStmt)
+ and 'FILE_FORMAT' in stmt.comment]
+
+ detected_format = (tuple([int(val) for val in
+ format_comment[0].split('=')[1].split(':')])
+ if len(format_comment) == 1 else None)
+ detected_zeros = zero_statements[0] if len(zero_statements) == 1 else None
+
+ # Bail out here if possible
+ if detected_format is not None and detected_zeros is not None:
+ return {'format': detected_format, 'zero_suppression': detected_zeros}
+
+ # Only look at remaining options
+ if detected_format is not None:
+ format_options = (detected_format,)
+ if detected_zeros is not None:
+ zs_options = (detected_zeros,)
+
+ # Brute force all remaining options, and pick the best looking one...
+ for zs in zs_options:
+ for fmt in format_options:
+ key = (fmt, zs)
+ settings = FileSettings(zero_suppression=zs, format=fmt)
+ try:
+ p = ExcellonParser(settings)
+ p.parse(filename)
+ size = tuple([t[1] - t[0] for t in p.bounds])
+ hole_area = 0.0
+ for hit in p.hits:
+ tool = hit[0]
+ hole_area += math.pow(math.pi * tool.diameter / 2., 2)
+ results[key] = (size, p.hole_count, hole_area)
+ except:
+ pass
+
+ # See if any of the dimensions are left with only a single option
+ formats = set(key[0] for key in results.iterkeys())
+ zeros = set(key[1] for key in results.iterkeys())
+ if len(formats) == 1:
+ detected_format = formats.pop()
+ if len(zeros) == 1:
+ detected_zeros = zeros.pop()
+
+ # Bail out here if we got everything....
+ if detected_format is not None and detected_zeros is not None:
+ return {'format': detected_format, 'zero_suppression': detected_zeros}
+
+ # Otherwise score each option and pick the best candidate
+ else:
+ scores = {}
+ for key in results.keys():
+ size, count, diameter = results[key]
+ scores[key] = _layer_size_score(size, count, diameter)
+ minscore = min(scores.values())
+ for key in scores.iterkeys():
+ if scores[key] == minscore:
+ return {'format': key[0], 'zero_suppression': key[1]}
+
+
+def _layer_size_score(size, hole_count, hole_area):
+ """ Heuristic used for determining the correct file number interpretation.
+ Lower is better.
+ """
+ board_area = size[0] * size[1]
+ hole_percentage = hole_area / board_area
+ hole_score = (hole_percentage - 0.25) ** 2
+ size_score = (board_area - 8) **2
+ return hole_score * size_score
generated by cgit (git 2.34.1) at 2024-07-28 04:17:02 +0000