diff options
Diffstat (limited to 'gerber/excellon.py')
| -rwxr-xr-x | gerber/excellon.py | 133 |
1 files changed, 87 insertions, 46 deletions
diff --git a/gerber/excellon.py b/gerber/excellon.py index fef5844..d92d57c 100755 --- a/gerber/excellon.py +++ b/gerber/excellon.py @@ -2,19 +2,60 @@ import re
from itertools import tee, izip
from .utils import parse_gerber_value
-
-
-INCH = 0
-METRIC = 1
-ABSOLUTE = 0
-INCREMENTAL = 1
-LZ = 0
-TZ = 1
+def read(filename):
+ """ Read data from filename and return an ExcellonFile
+ """
+ return ExcellonParser().parse(filename)
-class Tool(object):
+class ExcellonFile(object):
+ """ 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, tools, hits, settings, filename):
+ self.tools = tools
+ self.hits = hits
+ self.settings = settings
+ self.filename = filename
+
+ def report(self):
+ """ Print drill report
+ """
+ pass
+
+ def render(self, filename, ctx):
+ """ Generate image of file
+ """
+ for tool, pos in self.hits:
+ ctx.drill(pos[0], pos[1], tool.diameter)
+ ctx.dump(filename)
+
+
+class Tool(object):
+ """ Excellon Tool class
+ """
@classmethod
def from_line(cls, line, settings):
commands = re.split('([BCFHSTZ])', line)[1:]
@@ -38,7 +79,7 @@ class Tool(object): 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')
@@ -47,79 +88,83 @@ class Tool(object): 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)
-
+ self.units = settings.get('units', 'inch')
+
def __repr__(self):
- unit = 'in.' if self.units == INCH else 'mm'
+ unit = 'in.' if self.units == 'inch' else 'mm'
return '<Tool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
-
class ExcellonParser(object):
def __init__(self, ctx=None):
- self.ctx=ctx
+ self.ctx = ctx
self.notation = 'absolute'
self.units = 'inch'
self.zero_suppression = 'trailing'
- self.format = (2,5)
+ self.format = (2, 5)
self.state = 'INIT'
- self.tools = {}
+ self.tools = []
self.hits = []
self.active_tool = None
self.pos = [0., 0.]
if ctx is not None:
- self.ctx.set_coord_format(zero_suppression='trailing', format=[2,5], notation='absolute')
+ self.ctx.set_coord_format(zero_suppression='trailing',
+ format=(2, 5), notation='absolute')
+
def parse(self, filename):
with open(filename, 'r') as f:
for line in f:
self._parse(line)
-
+ settings = {'notation': self.notation, 'units': self.units,
+ 'zero_suppression': self.zero_suppression,
+ 'format': self.format}
+ return ExcellonFile(self.tools, self.hits, settings, filename)
+
def dump(self, filename):
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'
-
+ self.units = 'inch'
+
elif 'METRIC' in line or line.strip() == 'M71':
- self.units = 'METRIC'
-
+ self.units = 'metric'
+
if 'LZ' in line:
self.zeros = 'L'
-
+
elif 'TZ' in line:
self.zeros = 'T'
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 = 'incremental'
-
+
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())
+ 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
@@ -127,10 +172,9 @@ class ExcellonParser(object): 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)
+ y = parse_gerber_value(splitline[1].strip(), fmt, zs)
else:
- y = parse_gerber_value(line.strip(' Y'), fmt,zs)
-
+ y = parse_gerber_value(line.strip(' Y'), fmt, zs)
if self.notation == 'absolute':
if x is not None:
self.pos[0] = x
@@ -146,20 +190,17 @@ class ExcellonParser(object): 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,
+ 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__':
- tools = []
- settings = {'units':INCH, 'zeros':LZ}
p = parser()
p.parse('examples/ncdrill.txt')
-
-
\ No newline at end of file |