#!/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. """ Excellon Statements ==================== **Excellon file statement classes** """ from .utils import parse_gerber_value, write_gerber_value, decimal_string import re __all__ = ['ExcellonTool', 'ToolSelectionStmt', 'CoordinateStmt', 'CommentStmt', 'HeaderBeginStmt', 'HeaderEndStmt', 'RewindStopStmt', 'EndOfProgramStmt', 'UnitStmt', 'IncrementalModeStmt', 'VersionStmt', 'FormatStmt', 'LinkToolStmt', 'MeasuringModeStmt', 'RouteModeStmt', 'DrillModeStmt', 'AbsoluteModeStmt', 'RepeatHoleStmt', 'UnknownStmt', ] class ExcellonStatement(object): """ Excellon Statement abstract base class """ @classmethod def from_excellon(cls, line): pass def to_excellon(self, settings=None): pass class ExcellonTool(ExcellonStatement): """ Excellon Tool class Parameters ---------- settings : FileSettings (dict-like) File-wide settings. kwargs : dict-like Tool settings from the excellon statement. Valid keys are: - `diameter` : Tool diameter [expressed in file units] - `rpm` : Tool RPM - `feed_rate` : Z-axis tool feed rate - `retract_rate` : Z-axis tool retraction rate - `max_hit_count` : Number of hits allowed before a tool change - `depth_offset` : Offset of tool depth from tip of tool. Attributes ---------- number : integer Tool number from the excellon file diameter : float Tool diameter in file units rpm : float Tool RPM feed_rate : float Tool Z-axis feed rate. retract_rate : float Tool Z-axis retract rate depth_offset : float Offset of depth measurement from tip of tool max_hit_count : integer Maximum number of tool hits allowed before a tool change hit_count : integer Number of tool hits in excellon file. """ @classmethod def from_excellon(cls, line, settings): """ Create a Tool from an excellon file tool definition line. Parameters ---------- line : string Tool definition line from an excellon file. settings : FileSettings (dict-like) Excellon file-wide settings Returns ------- tool : Tool An ExcellonTool representing the tool defined in `line` """ commands = re.split('([BCFHSTZ])', line)[1:] commands = [(command, value) for command, value in pairwise(commands)] args = {} nformat = settings.format zero_suppression = settings.zero_suppression for cmd, val in commands: if cmd == 'B': args['retract_rate'] = parse_gerber_value(val, nformat, zero_suppression) elif cmd == 'C': args['diameter'] = parse_gerber_value(val, nformat, zero_suppression) elif cmd == 'F': args['feed_rate'] = parse_gerber_value(val, nformat, zero_suppression) elif cmd == 'H': args['max_hit_count'] = parse_gerber_value(val, nformat, zero_suppression) elif cmd == 'S': args['rpm'] = 1000 * parse_gerber_value(val, nformat, zero_suppression) elif cmd == 'T': args['number'] = int(val) elif cmd == 'Z': args['depth_offset'] = parse_gerber_value(val, nformat, zero_suppression) return cls(settings, **args) @classmethod def from_dict(cls, settings, tool_dict): """ Create an ExcellonTool from a dict. Parameters ---------- settings : FileSettings (dict-like) Excellon File-wide settings tool_dict : dict Excellon tool parameters as a dict Returns ------- tool : ExcellonTool An ExcellonTool initialized with the parameters in tool_dict. """ return cls(settings, tool_dict) def __init__(self, settings, **kwargs): self.settings = settings 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.hit_count = 0 def to_excellon(self, settings=None): fmt = self.settings.format zs = self.settings.format stmt = 'T%02d' % self.number if self.retract_rate is not None: stmt += 'B%s' % write_gerber_value(self.retract_rate, fmt, zs) if self.feed_rate is not None: stmt += 'F%s' % write_gerber_value(self.feed_rate, fmt, zs) if self.max_hit_count is not None: stmt += 'H%s' % write_gerber_value(self.max_hit_count, fmt, zs) if self.rpm is not None: if self.rpm < 100000.: stmt += 'S%s' % write_gerber_value(self.rpm / 1000., fmt, zs) else: stmt += 'S%g' % self.rpm / 1000. if self.diameter is not None: stmt += 'C%s' % decimal_string(self.diameter, fmt[1], True) if self.depth_offset is not None: stmt += 'Z%s' % write_gerber_value(self.depth_offset, fmt, zs) return stmt def to_inch(self): if self.diameter is not None: self.diameter = self.diameter / 25.4 def to_metric(self): if self.diameter is not None: self.diameter = self.diameter * 25.4 def _hit(self): self.hit_count += 1 def __repr__(self): unit = 'in.' if self.settings.units == 'inch' else 'mm' return '' % (self.number, self.diameter, unit) class ToolSelectionStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): """ Create a ToolSelectionStmt from an excellon file line. Parameters ---------- line : string Line from an Excellon file Returns ------- tool_statement : ToolSelectionStmt ToolSelectionStmt representation of `line.` """ line = line[1:] compensation_index = None tool = int(line[:2]) if len(line) > 2: compensation_index = int(line[2:]) return cls(tool, compensation_index) def __init__(self, tool, compensation_index=None): tool = int(tool) compensation_index = (int(compensation_index) if compensation_index is not None else None) self.tool = tool self.compensation_index = compensation_index def to_excellon(self, settings=None): stmt = 'T%02d' % self.tool if self.compensation_index is not None: stmt += '%02d' % self.compensation_index return stmt class CoordinateStmt(ExcellonStatement): @classmethod def from_excellon(cls, line, settings): x_coord = None y_coord = None if line[0] == 'X': splitline = line.strip('X').split('Y') x_coord = parse_gerber_value(splitline[0], settings.format, settings.zero_suppression) if len(splitline) == 2: y_coord = parse_gerber_value(splitline[1], settings.format, settings.zero_suppression) else: y_coord = parse_gerber_value(line.strip(' Y'), settings.format, settings.zero_suppression) return cls(x_coord, y_coord) def __init__(self, x=None, y=None): self.x = x self.y = y def to_excellon(self, settings): stmt = '' if self.x is not None: stmt += 'X%s' % write_gerber_value(self.x, settings.format, settings.zero_suppression) if self.y is not None: stmt += 'Y%s' % write_gerber_value(self.y, settings.format, settings.zero_suppression) return stmt def to_inch(self): if self.x is not None: self.x = self.x / 25.4 if self.y is not None: self.y = self.y / 25.4 def to_metric(self): if self.x is not None: self.x = self.x * 25.4 if self.y is not None: self.y = self.y * 25.4 def __str__(self): coord_str = '' if self.x is not None: coord_str += 'X: %f ' % self.x if self.y is not None: coord_str += 'Y: %f ' % self.y return '' % coord_str class RepeatHoleStmt(ExcellonStatement): @classmethod def from_excellon(cls, line, settings): return cls(line) def __init__(self, line): self.line = line def to_excellon(self, settings): return self.line def __str__(self): return '' % self.line class CommentStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): return cls(line.lstrip(';')) def __init__(self, comment): self.comment = comment def to_excellon(self, settings=None): return ';%s' % self.comment class HeaderBeginStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return 'M48' class HeaderEndStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return 'M95' class RewindStopStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return '%' class EndOfProgramStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): return cls() def __init__(self, x=None, y=None): self.x = x self.y = y def to_excellon(self, settings=None): stmt = 'M30' if self.x is not None: stmt += 'X%s' % write_gerber_value(self.x) if self.y is not None: stmt += 'Y%s' % write_gerber_value(self.y) return stmt class UnitStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): units = 'inch' if 'INCH' in line else 'metric' zeros = 'leading' if 'LZ' in line else 'trailing' return cls(units, zeros) def __init__(self, units='inch', zeros='leading'): self.units = units.lower() self.zeros = zeros def to_excellon(self, settings=None): stmt = '%s,%s' % ('INCH' if self.units == 'inch' else 'METRIC', 'LZ' if self.zeros == 'leading' else 'TZ') return stmt class IncrementalModeStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): return cls('off') if 'OFF' in line else cls('on') def __init__(self, mode='off'): if mode.lower() not in ['on', 'off']: raise ValueError('Mode may be "on" or "off"') self.mode = mode def to_excellon(self, settings=None): return 'ICI,%s' % ('OFF' if self.mode == 'off' else 'ON') class VersionStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): version = int(line.split(',')[1]) return cls(version) def __init__(self, version=1): version = int(version) if version not in [1, 2]: raise ValueError('Valid versions are 1 or 2') self.version = version def to_excellon(self, settings=None): return 'VER,%d' % self.version class FormatStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): fmt = int(line.split(',')[1]) return cls(fmt) def __init__(self, format=1): format = int(format) if format not in [1, 2]: raise ValueError('Valid formats are 1 or 2') self.format = format def to_excellon(self, settings=None): return 'FMAT,%d' % self.format class LinkToolStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): linked = [int(tool) for tool in line.split('/')] return cls(linked) def __init__(self, linked_tools): self.linked_tools = [int(x) for x in linked_tools] def to_excellon(self, settings=None): return '/'.join([str(x) for x in self.linked_tools]) class MeasuringModeStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): if not ('M71' in line or 'M72' in line): raise ValueError('Not a measuring mode statement') return cls('inch') if 'M72' in line else cls('metric') def __init__(self, units='inch'): units = units.lower() if units not in ['inch', 'metric']: raise ValueError('units must be "inch" or "metric"') self.units = units def to_excellon(self, settings=None): return 'M72' if self.units == 'inch' else 'M71' class RouteModeStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return 'G00' class DrillModeStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return 'G05' class AbsoluteModeStmt(ExcellonStatement): def __init__(self): pass def to_excellon(self, settings=None): return 'G90' class UnknownStmt(ExcellonStatement): @classmethod def from_excellon(cls, line): return cls(line) def __init__(self, stmt): self.stmt = stmt def to_excellon(self, settings=None): return self.stmt def __str__(self): return "" % self.stmt def pairwise(iterator): """ Iterate over list taking two elements at a time. e.g. [1, 2, 3, 4, 5, 6] ==> [(1, 2), (3, 4), (5, 6)] """ itr = iter(iterator) while True: yield tuple([itr.next() for i in range(2)])