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#! /usr/bin/env python
# -*- 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
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# 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.
"""
Excellon File module
====================
**Excellon file classes**
This module provides Excellon file classes and parsing utilities
"""
from .excellon_statements import *
from .cnc import CncFile, FileSettings
def read(filename):
""" Read data from filename and return an ExcellonFile
"""
return ExcellonParser().parse(filename)
class ExcellonFile(CncFile):
""" 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, settings, filename)
self.tools = tools
self.hits = hits
def report(self):
""" Print drill report
"""
pass
def render(self, ctx, filename=None):
""" Generate image of file
"""
for tool, pos in self.hits:
ctx.drill(pos[0], pos[1], tool.diameter)
if filename is not None:
ctx.dump(filename)
def write(self, filename):
with open(filename, 'w') as f:
for statement in self.statements:
f.write(statement.to_excellon() + '\n')
class ExcellonParser(object):
""" Excellon File Parser
"""
def __init__(self):
self.notation = 'absolute'
self.units = 'inch'
self.zero_suppression = 'trailing'
self.format = (2, 5)
self.state = 'INIT'
self.statements = []
self.tools = {}
self.hits = []
self.active_tool = None
self.pos = [0., 0.]
def parse(self, filename):
with open(filename, 'r') as f:
for line in f:
self._parse(line)
return ExcellonFile(self.statements, self.tools, self.hits,
self._settings(), filename)
def _parse(self, 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'
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'
elif line[:3] == 'G05':
self.state = 'DRILL'
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':
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
if y is not None:
self.pos[1] = y
else:
if x is not None:
self.pos[0] += x
if y is not None:
self.pos[1] += y
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 FileSettings(units=self.units, format=self.format,
zero_suppression=self.zero_suppression,
notation=self.notation)
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