From 43b599106f746dd42423eda1f91a592813ecc224 Mon Sep 17 00:00:00 2001 From: Hamilton Kibbe Date: Sun, 28 Sep 2014 13:04:32 -0400 Subject: Add Excellon support --- gerber/excellon.py | 180 +++++++++++++++++++++++++++++++++++++++++++++++++++ gerber/render.py | 3 + gerber/render_svg.py | 12 +++- gerber/utils.py | 54 +++++++++++++++- 4 files changed, 244 insertions(+), 5 deletions(-) create mode 100755 gerber/excellon.py (limited to 'gerber') diff --git a/gerber/excellon.py b/gerber/excellon.py new file mode 100755 index 0000000..1e746ad --- /dev/null +++ b/gerber/excellon.py @@ -0,0 +1,180 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +# Copyright 2014 Hamilton Kibbe + +# 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. + + +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 '' % (self.number, self.diameter, unit) + + + +class ExcellonParser(object): + def __init__(self, ctx=None): + self.ctx=ctx + self.notation = 'absolute' + self.units = 'inch' + self.zero_suppression = 'trailing' + self.format = (2,5) + self.state = 'INIT' + 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) + 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) + + def _parse(self, line): + if 'M48' in line: + self.state = 'HEADER' + + if 'G00' in line: + self.state = 'ROUT' + + if 'G05' in line: + self.state = 'DRILL' + + elif line[0] == '%' and self.state == 'HEADER': + 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()) + self.tools[tool.number] = 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) + + 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, self.pos)) + if self.ctx is not None: + self.ctx.drill(self.pos[0], self.pos[1], + self.active_tool.diameter) + + 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 diff --git a/gerber/render.py b/gerber/render.py index 201f793..183a59f 100644 --- a/gerber/render.py +++ b/gerber/render.py @@ -140,6 +140,9 @@ class GerberContext(object): def flash(self, x, y): pass + def drill(self, x, y, diameter): + pass + def evaluate(self, stmt): if isinstance(stmt, (CommentStmt, UnknownStmt, EofStmt)): return diff --git a/gerber/render_svg.py b/gerber/render_svg.py index bfe6859..cb42371 100644 --- a/gerber/render_svg.py +++ b/gerber/render_svg.py @@ -44,6 +44,9 @@ class Rect(Shape): stroke_width=2, stroke_linecap="butt") def flash(self, ctx, x, y): + # Center the rectange on x,y + x -= (self.size[0] / 2.0) + y -= (self.size[0] / 2.0) return ctx.dwg.rect(insert=(300*x, 300*y), size=(300*float(self.size[0]), 300*float(self.size[1])), fill="rgb(184, 115, 51)") @@ -102,5 +105,10 @@ class GerberSvgContext(GerberContext): self.move(x, y, resolve=False) - def dump(self): - self.dwg.saveas("teste.svg") + def drill(self, x, y, diameter): + hit = self.dwg.circle(center=(x*300, y*300), r=300*(diameter/2.0), fill="gray") + self.dwg.add(hit) + + + def dump(self,filename='teste.svg'): + self.dwg.saveas(filename) diff --git a/gerber/utils.py b/gerber/utils.py index 02a8a14..00b821b 100644 --- a/gerber/utils.py +++ b/gerber/utils.py @@ -1,5 +1,19 @@ #!/usr/bin/env python # -*- coding: utf-8 -*- + +# Copyright 2014 Hamilton Kibbe + +# 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. """ gerber.utils ============ @@ -9,8 +23,6 @@ This module provides utility functions for working with Gerber and Excellon files. """ -# Author: Hamilton Kibbe -# License: MIT def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'): """ Convert gerber/excellon formatted string to floating-point number @@ -54,6 +66,7 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'): raise ValueError('Parser only supports precision up to 6:7 format') # Remove extraneous information + value = value.strip() value = value.strip(' +') negative = '-' in value if negative: @@ -67,7 +80,8 @@ def parse_gerber_value(value, format=(2, 5), zero_suppression='trailing'): offset = 0 if zero_suppression == 'trailing' else (MAX_DIGITS - len(value)) for i, digit in enumerate(value): digits[i + offset] = digit - + + result = float(''.join(digits[:integer_digits] + ['.'] + digits[integer_digits:])) return -1.0 * result if negative else result @@ -128,3 +142,37 @@ def write_gerber_value(value, format=(2, 5), zero_suppression='trailing'): return ''.join(digits) if not negative else ''.join(['-'] + digits) + + +def decimal_string(value, precision=6): + """ Convert float to string with limited precision + + Parameters + ---------- + value : float + A floating point value. + + precision : + Maximum number of decimal places to print + + Returns + ------- + value : string + The specified value as a string. + + """ + floatstr = '%0.20g' % value + integer = None + decimal = None + if '.' in floatstr: + integer, decimal = floatstr.split('.') + elif ',' in floatstr: + integer, decimal = floatstr.split(',') + if len(decimal) > precision: + decimal = decimal[:precision] + if integer or decimal: + return ''.join([integer, '.', decimal]) + else: + return int(floatstr) + + -- cgit