Add Excellon support
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Hamilton Kibbe
parent
858fc5f6d8
commit
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5 changed files with 248 additions and 5 deletions
4
.gitignore
vendored
4
.gitignore
vendored
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@ -37,3 +37,7 @@ nosetests.xml
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.idea/workspace.xml
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.idea/misc.xml
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.idea
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# OS Files
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.DS_Store
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Thumbs.db
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180
gerber/excellon.py
Executable file
180
gerber/excellon.py
Executable file
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@ -0,0 +1,180 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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from itertools import tee, izip
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from .utils import parse_gerber_value
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class Tool(object):
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@classmethod
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def from_line(cls, line, settings):
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commands = re.split('([BCFHSTZ])', line)[1:]
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commands = [(command, value) for command, value in pairwise(commands)]
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args = {}
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format = settings['format']
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zero_suppression = settings['zero_suppression']
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for cmd, val in commands:
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if cmd == 'B':
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args['retract_rate'] = parse_gerber_value(val, format, zero_suppression)
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elif cmd == 'C':
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args['diameter'] = parse_gerber_value(val, format, zero_suppression)
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elif cmd == 'F':
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args['feed_rate'] = parse_gerber_value(val, format, zero_suppression)
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elif cmd == 'H':
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args['max_hit_count'] = parse_gerber_value(val, format, zero_suppression)
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elif cmd == 'S':
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args['rpm'] = 1000 * parse_gerber_value(val, format, zero_suppression)
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elif cmd == 'T':
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args['number'] = int(val)
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elif cmd == 'Z':
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args['depth_offset'] = parse_gerber_value(val, format, zero_suppression)
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return cls(settings, **args)
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def __init__(self, settings, **kwargs):
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self.number = kwargs.get('number')
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self.feed_rate = kwargs.get('feed_rate')
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self.retract_rate = kwargs.get('retract_rate')
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self.rpm = kwargs.get('rpm')
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self.diameter = kwargs.get('diameter')
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self.max_hit_count = kwargs.get('max_hit_count')
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self.depth_offset = kwargs.get('depth_offset')
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self.units = settings.get('units', 'inch')
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def __repr__(self):
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unit = 'in.' if self.units == 'inch' else 'mm'
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return '<Tool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
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class ExcellonParser(object):
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def __init__(self, ctx=None):
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self.ctx=ctx
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self.notation = 'absolute'
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self.units = 'inch'
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self.zero_suppression = 'trailing'
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self.format = (2,5)
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self.state = 'INIT'
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self.tools = {}
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self.hits = []
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self.active_tool = None
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self.pos = [0., 0.]
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if ctx is not None:
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zeros = 'L' if self.zero_suppression == 'leading' else 'T'
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x = self.format
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y = self.format
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self.ctx.set_coord_format(zeros, x, y)
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def parse(self, filename):
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with open(filename, 'r') as f:
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for line in f:
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self._parse(line)
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def dump(self, filename='teste.svg'):
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if self.ctx is not None:
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self.ctx.dump(filename)
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def _parse(self, line):
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if 'M48' in line:
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self.state = 'HEADER'
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if 'G00' in line:
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self.state = 'ROUT'
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if 'G05' in line:
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self.state = 'DRILL'
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elif line[0] == '%' and self.state == 'HEADER':
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self.state = 'DRILL'
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if 'INCH' in line or line.strip() == 'M72':
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self.units = 'inch'
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elif 'METRIC' in line or line.strip() == 'M71':
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self.units = 'metric'
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if 'LZ' in line:
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self.zero_suppression = 'trailing'
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elif 'TZ' in line:
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self.zero_suppression = 'leading'
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if 'ICI' in line and 'ON' in line or line.strip() == 'G91':
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self.notation = 'incremental'
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if 'ICI' in line and 'OFF' in line or line.strip() == 'G90':
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self.notation = 'absolute'
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zs = self._settings()['zero_suppression']
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fmt = self._settings()['format']
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# tool definition
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if line[0] == 'T' and self.state == 'HEADER':
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tool = Tool.from_line(line,self._settings())
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self.tools[tool.number] = tool
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elif line[0] == 'T' and self.state != 'HEADER':
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self.active_tool = self.tools[int(line.strip().split('T')[1])]
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if line[0] in ['X', 'Y']:
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x = None
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y = None
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if line[0] == 'X':
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splitline = line.strip('X').split('Y')
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x = parse_gerber_value(splitline[0].strip(), fmt, zs)
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if len(splitline) == 2:
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y = parse_gerber_value(splitline[1].strip(), fmt,zs)
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else:
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y = parse_gerber_value(line.strip(' Y'), fmt,zs)
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if self.notation == 'absolute':
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if x is not None:
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self.pos[0] = x
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if y is not None:
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self.pos[1] = y
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else:
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if x is not None:
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self.pos[0] += x
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if y is not None:
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self.pos[1] += y
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if self.state == 'DRILL':
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self.hits.append((self.active_tool, self.pos))
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if self.ctx is not None:
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self.ctx.drill(self.pos[0], self.pos[1],
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self.active_tool.diameter)
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def _settings(self):
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return {'units':self.units, 'zero_suppression':self.zero_suppression,
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'format': self.format}
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def pairwise(iterator):
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itr = iter(iterator)
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while True:
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yield tuple([itr.next() for i in range(2)])
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if __name__ == '__main__':
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from .render_svg import GerberSvgContext
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tools = []
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p = ExcellonParser(GerberSvgContext())
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p.parse('examples/ncdrill.txt')
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p.dump('excellon.svg')
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@ -140,6 +140,9 @@ class GerberContext(object):
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def flash(self, x, y):
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pass
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def drill(self, x, y, diameter):
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pass
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def evaluate(self, stmt):
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if isinstance(stmt, (CommentStmt, UnknownStmt, EofStmt)):
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return
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@ -44,6 +44,9 @@ class Rect(Shape):
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stroke_width=2, stroke_linecap="butt")
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def flash(self, ctx, x, y):
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# Center the rectange on x,y
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x -= (self.size[0] / 2.0)
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y -= (self.size[0] / 2.0)
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return ctx.dwg.rect(insert=(300*x, 300*y), size=(300*float(self.size[0]), 300*float(self.size[1])),
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fill="rgb(184, 115, 51)")
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@ -102,5 +105,10 @@ class GerberSvgContext(GerberContext):
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self.move(x, y, resolve=False)
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def dump(self):
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self.dwg.saveas("teste.svg")
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def drill(self, x, y, diameter):
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hit = self.dwg.circle(center=(x*300, y*300), r=300*(diameter/2.0), fill="gray")
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self.dwg.add(hit)
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def dump(self,filename='teste.svg'):
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self.dwg.saveas(filename)
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@ -1,5 +1,19 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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gerber.utils
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============
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@ -9,8 +23,6 @@ This module provides utility functions for working with Gerber and Excellon
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files.
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"""
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# Author: Hamilton Kibbe <ham@hamiltonkib.be>
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# License: MIT
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def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
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""" Convert gerber/excellon formatted string to floating-point number
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@ -54,6 +66,7 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
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raise ValueError('Parser only supports precision up to 6:7 format')
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# Remove extraneous information
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value = value.strip()
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value = value.strip(' +')
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negative = '-' in value
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if negative:
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@ -67,7 +80,8 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
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offset = 0 if zero_suppression == 'trailing' else (MAX_DIGITS - len(value))
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for i, digit in enumerate(value):
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digits[i + offset] = digit
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result = float(''.join(digits[:integer_digits] + ['.'] + digits[integer_digits:]))
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return -1.0 * result if negative else result
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@ -128,3 +142,37 @@ def write_gerber_value(value, format=(2, 5), zero_suppression='trailing'):
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return ''.join(digits) if not negative else ''.join(['-'] + digits)
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def decimal_string(value, precision=6):
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""" Convert float to string with limited precision
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Parameters
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----------
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value : float
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A floating point value.
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precision :
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Maximum number of decimal places to print
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Returns
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-------
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value : string
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The specified value as a string.
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"""
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floatstr = '%0.20g' % value
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integer = None
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decimal = None
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if '.' in floatstr:
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integer, decimal = floatstr.split('.')
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elif ',' in floatstr:
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integer, decimal = floatstr.split(',')
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if len(decimal) > precision:
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decimal = decimal[:precision]
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if integer or decimal:
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return ''.join([integer, '.', decimal])
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else:
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return int(floatstr)
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