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-rw-r--r--gerber/cam.py (renamed from gerber/cnc.py)17
-rwxr-xr-xgerber/excellon.py155
-rw-r--r--gerber/gerber.py4
-rw-r--r--gerber/gerber_statements.py7
-rw-r--r--gerber/tests/test_cam.py (renamed from gerber/tests/test_cnc.py)6
-rw-r--r--gerber/tests/test_gerber_statements.py76
6 files changed, 232 insertions, 33 deletions
diff --git a/gerber/cnc.py b/gerber/cam.py
index d17517a..e7a49d1 100644
--- a/gerber/cnc.py
+++ b/gerber/cam.py
@@ -15,16 +15,16 @@
# See the License for the specific language governing permissions and
# limitations under the License.
"""
-gerber.cnc
+CAM File
============
-**CNC file classes**
+**AM file classes**
This module provides common base classes for Excellon/Gerber CNC files
"""
class FileSettings(object):
- """ CNC File Settings
+ """ CAM File Settings
Provides a common representation of gerber/excellon file settings
"""
@@ -60,7 +60,7 @@ class FileSettings(object):
raise KeyError()
-class CncFile(object):
+class CamFile(object):
""" Base class for Gerber/Excellon files.
Provides a common set of settings parameters.
@@ -71,7 +71,10 @@ class CncFile(object):
The current file configuration.
filename : string
- Name of the file that this CncFile represents.
+ Name of the file that this CamFile represents.
+
+ layer_name : string
+ Name of the PCB layer that the file represents
Attributes
----------
@@ -92,7 +95,8 @@ class CncFile(object):
decimal digits)
"""
- def __init__(self, statements=None, settings=None, filename=None):
+ def __init__(self, statements=None, settings=None, filename=None,
+ layer_name=None):
if settings is not None:
self.notation = settings['notation']
self.units = settings['units']
@@ -105,6 +109,7 @@ class CncFile(object):
self.format = (2, 5)
self.statements = statements if statements is not None else []
self.filename = filename
+ self.layer_name = layer_name
@property
def settings(self):
diff --git a/gerber/excellon.py b/gerber/excellon.py
index 4166de6..1a498dc 100755
--- a/gerber/excellon.py
+++ b/gerber/excellon.py
@@ -24,16 +24,22 @@ This module provides Excellon file classes and parsing utilities
from .excellon_statements import *
-from .cnc import CncFile, FileSettings
+from .cam import CamFile, FileSettings
+import math
def read(filename):
""" Read data from filename and return an ExcellonFile
"""
- return ExcellonParser().parse(filename)
+ detected_settings = detect_excellon_format(filename)
+ settings = FileSettings(**detected_settings)
+ zeros = ''
+ print('Detected %d:%d format with %s zero suppression' %
+ (settings.format[0], settings.format[1], settings.zero_suppression))
+ return ExcellonParser(settings).parse(filename)
-class ExcellonFile(CncFile):
+class ExcellonFile(CamFile):
""" A class representing a single excellon file
The ExcellonFile class represents a single excellon file.
@@ -83,8 +89,13 @@ class ExcellonFile(CncFile):
class ExcellonParser(object):
""" Excellon File Parser
+
+ Parameters
+ ----------
+ settings : FileSettings or dict-like
+ Excellon file settings to use when interpreting the excellon file.
"""
- def __init__(self):
+ def __init__(self, settings=None):
self.notation = 'absolute'
self.units = 'inch'
self.zero_suppression = 'trailing'
@@ -95,7 +106,38 @@ class ExcellonParser(object):
self.hits = []
self.active_tool = None
self.pos = [0., 0.]
-
+ if settings is not None:
+ self.units = settings['units']
+ self.zero_suppression = settings['zero_suppression']
+ self.notation = settings['notation']
+ self.format = settings['format']
+
+
+ @property
+ def coordinates(self):
+ return [(stmt.x, stmt.y) for stmt in self.statements if isinstance(stmt, CoordinateStmt)]
+
+ @property
+ def bounds(self):
+ xmin = ymin = 100000000000
+ xmax = ymax = -100000000000
+ for x, y in self.coordinates:
+ if x is not None:
+ xmin = x if x < xmin else xmin
+ xmax = x if x > xmax else xmax
+ if y is not None:
+ ymin = y if y < ymin else ymin
+ ymax = y if y > ymax else ymax
+ return ((xmin, xmax), (ymin, ymax))
+
+ @property
+ def hole_sizes(self):
+ return [stmt.diameter for stmt in self.statements if isinstance(stmt, ExcellonTool)]
+
+ @property
+ def hole_count(self):
+ return len(self.hits)
+
def parse(self, filename):
with open(filename, 'r') as f:
for line in f:
@@ -194,3 +236,106 @@ class ExcellonParser(object):
return FileSettings(units=self.units, format=self.format,
zero_suppression=self.zero_suppression,
notation=self.notation)
+
+
+def detect_excellon_format(filename):
+ """ Detect excellon file decimal format and zero-suppression settings.
+
+ Parameters
+ ----------
+ filename : string
+ Name of the file to parse. This does not check if the file is actually
+ an Excellon file, so do that before calling this.
+
+ Returns
+ -------
+ settings : dict
+ Detected excellon file settings. Keys are
+ - `format`: decimal format as tuple (<int part>, <decimal part>)
+ - `zero_suppression`: zero suppression, 'leading' or 'trailing'
+ """
+ results = {}
+ detected_zeros = None
+ detected_format = None
+ zs_options = ('leading', 'trailing', )
+ format_options = ((2, 4), (2, 5), (3, 3),)
+
+ # Check for obvious clues:
+ p = ExcellonParser()
+ p.parse(filename)
+
+ # Get zero_suppression from a unit statement
+ zero_statements = [stmt.zero_suppression for stmt in p.statements
+ if isinstance(stmt, UnitStmt)]
+
+ # get format from altium comment
+ format_comment = [stmt.comment for stmt in p.statements
+ if isinstance(stmt, CommentStmt)
+ and 'FILE_FORMAT' in stmt.comment]
+
+ detected_format = (tuple([int(val) for val in
+ format_comment[0].split('=')[1].split(':')])
+ if len(format_comment) == 1 else None)
+ detected_zeros = zero_statements[0] if len(zero_statements) == 1 else None
+
+ # Bail out here if possible
+ if detected_format is not None and detected_zeros is not None:
+ return {'format': detected_format, 'zero_suppression': detected_zeros}
+
+ # Only look at remaining options
+ if detected_format is not None:
+ format_options = (detected_format,)
+ if detected_zeros is not None:
+ zs_options = (detected_zeros,)
+
+ # Brute force all remaining options, and pick the best looking one...
+ for zs in zs_options:
+ for fmt in format_options:
+ key = (fmt, zs)
+ settings = FileSettings(zero_suppression=zs, format=fmt)
+ try:
+ p = ExcellonParser(settings)
+ p.parse(filename)
+ size = tuple([t[1] - t[0] for t in p.bounds])
+ hole_area = 0.0
+ for hit in p.hits:
+ tool = hit[0]
+ hole_area += math.pow(math.pi * tool.diameter, 2)
+ results[key] = (size, p.hole_count, hole_area)
+ except:
+ pass
+
+ # See if any of the dimensions are left with only a single option
+ formats = set(key[0] for key in results.iterkeys())
+ zeros = set(key[1] for key in results.iterkeys())
+ if len(formats) == 1:
+ detected_format = formats.pop()
+ if len(zeros) == 1:
+ detected_zeros = zeros.pop()
+
+ # Bail out here if we got everything....
+ if detected_format is not None and detected_zeros is not None:
+ return {'format': detected_format, 'zero_suppression': detected_zeros}
+
+ # Otherwise score each option and pick the best candidate
+ else:
+ scores = {}
+ for key in results.keys():
+ size, count, diameter = results[key]
+ scores[key] = _layer_size_score(size, count, diameter)
+ minscore = min(scores.values())
+ for key in scores.iterkeys():
+ if scores[key] == minscore:
+ return {'format': key[0], 'zero_suppression': key[1]}
+
+
+def _layer_size_score(size, hole_count, hole_area):
+ """ Heuristic used for determining the correct file number interpretation.
+ Lower is better.
+ """
+ board_area = size[0] * size[1]
+ hole_percentage = hole_area / board_area
+ hole_score = (hole_percentage - 0.25) ** 2
+ size_score = (board_area - 8) **2
+ return hole_score * size_score
+ \ No newline at end of file
diff --git a/gerber/gerber.py b/gerber/gerber.py
index 4ce261d..215b970 100644
--- a/gerber/gerber.py
+++ b/gerber/gerber.py
@@ -27,7 +27,7 @@ This module provides an RS-274-X class and parser
import re
import json
from .gerber_statements import *
-from .cnc import CncFile, FileSettings
+from .cam import CamFile, FileSettings
@@ -38,7 +38,7 @@ def read(filename):
return GerberParser().parse(filename)
-class GerberFile(CncFile):
+class GerberFile(CamFile):
""" A class representing a single gerber file
The GerberFile class represents a single gerber file.
diff --git a/gerber/gerber_statements.py b/gerber/gerber_statements.py
index a22eae2..218074f 100644
--- a/gerber/gerber_statements.py
+++ b/gerber/gerber_statements.py
@@ -133,7 +133,12 @@ class MOParamStmt(ParamStmt):
@classmethod
def from_dict(cls, stmt_dict):
param = stmt_dict.get('param')
- mo = 'inch' if stmt_dict.get('mo') == 'IN' else 'metric'
+ if stmt_dict.get('mo').lower() == 'in':
+ mo = 'inch'
+ elif stmt_dict.get('mo').lower() == 'mm':
+ mo = 'metric'
+ else:
+ mo = None
return cls(param, mo)
def __init__(self, param, mo):
diff --git a/gerber/tests/test_cnc.py b/gerber/tests/test_cam.py
index ace047e..4af1984 100644
--- a/gerber/tests/test_cnc.py
+++ b/gerber/tests/test_cam.py
@@ -3,7 +3,7 @@
# Author: Hamilton Kibbe <ham@hamiltonkib.be>
-from ..cnc import CncFile, FileSettings
+from ..cam import CamFile, FileSettings
from tests import *
@@ -46,5 +46,5 @@ def test_filesettings_assign():
assert_equal(fs.zero_suppression, 'test')
assert_equal(fs.format, 'test')
- def test_smoke_cncfile():
- pass
+def test_smoke_camfile():
+ cf = CamFile
diff --git a/gerber/tests/test_gerber_statements.py b/gerber/tests/test_gerber_statements.py
index 9e73fd4..a463c9d 100644
--- a/gerber/tests/test_gerber_statements.py
+++ b/gerber/tests/test_gerber_statements.py
@@ -8,7 +8,7 @@ from ..gerber_statements import *
def test_FSParamStmt_factory():
- """ Test FSParamStruct factory correctly handles parameters
+ """ Test FSParamStruct factory
"""
stmt = {'param': 'FS', 'zero': 'L', 'notation': 'A', 'x': '27'}
fs = FSParamStmt.from_dict(stmt)
@@ -24,6 +24,18 @@ def test_FSParamStmt_factory():
assert_equal(fs.notation, 'incremental')
assert_equal(fs.format, (2, 7))
+def test_FSParamStmt():
+ """ Test FSParamStmt initialization
+ """
+ param = 'FS'
+ zeros = 'trailing'
+ notation = 'absolute'
+ fmt = (2, 5)
+ stmt = FSParamStmt(param, zeros, notation, fmt)
+ assert_equal(stmt.param, param)
+ assert_equal(stmt.zero_suppression, zeros)
+ assert_equal(stmt.notation, notation)
+ assert_equal(stmt.format, fmt)
def test_FSParamStmt_dump():
""" Test FSParamStmt to_gerber()
@@ -38,17 +50,31 @@ def test_FSParamStmt_dump():
def test_MOParamStmt_factory():
- """ Test MOParamStruct factory correctly handles parameters
+ """ Test MOParamStruct factory
"""
- stmt = {'param': 'MO', 'mo': 'IN'}
- mo = MOParamStmt.from_dict(stmt)
- assert_equal(mo.param, 'MO')
- assert_equal(mo.mode, 'inch')
+ stmts = [{'param': 'MO', 'mo': 'IN'}, {'param': 'MO', 'mo': 'in'}, ]
+ for stmt in stmts:
+ mo = MOParamStmt.from_dict(stmt)
+ assert_equal(mo.param, 'MO')
+ assert_equal(mo.mode, 'inch')
+
+ stmts = [{'param': 'MO', 'mo': 'MM'}, {'param': 'MO', 'mo': 'mm'}, ]
+ for stmt in stmts:
+ mo = MOParamStmt.from_dict(stmt)
+ assert_equal(mo.param, 'MO')
+ assert_equal(mo.mode, 'metric')
+
+def test_MOParamStmt():
+ """ Test MOParamStmt initialization
+ """
+ param = 'MO'
+ mode = 'inch'
+ stmt = MOParamStmt(param, mode)
+ assert_equal(stmt.param, param)
- stmt = {'param': 'MO', 'mo': 'MM'}
- mo = MOParamStmt.from_dict(stmt)
- assert_equal(mo.param, 'MO')
- assert_equal(mo.mode, 'metric')
+ for mode in ['inch', 'metric']:
+ stmt = MOParamStmt(param, mode)
+ assert_equal(stmt.mode, mode)
def test_MOParamStmt_dump():
@@ -64,7 +90,7 @@ def test_MOParamStmt_dump():
def test_IPParamStmt_factory():
- """ Test IPParamStruct factory correctly handles parameters
+ """ Test IPParamStruct factory
"""
stmt = {'param': 'IP', 'ip': 'POS'}
ip = IPParamStmt.from_dict(stmt)
@@ -74,6 +100,15 @@ def test_IPParamStmt_factory():
ip = IPParamStmt.from_dict(stmt)
assert_equal(ip.ip, 'negative')
+def test_IPParamStmt():
+ """ Test IPParamStmt initialization
+ """
+ param = 'IP'
+ for ip in ['positive', 'negative']:
+ stmt = IPParamStmt(param, ip)
+ assert_equal(stmt.param, param)
+ assert_equal(stmt.ip, ip)
+
def test_IPParamStmt_dump():
""" Test IPParamStmt to_gerber()
@@ -88,14 +123,23 @@ def test_IPParamStmt_dump():
def test_OFParamStmt_factory():
- """ Test OFParamStmt factory correctly handles parameters
+ """ Test OFParamStmt factory
"""
stmt = {'param': 'OF', 'a': '0.1234567', 'b': '0.1234567'}
of = OFParamStmt.from_dict(stmt)
assert_equal(of.a, 0.1234567)
assert_equal(of.b, 0.1234567)
-
+def test_OFParamStmt():
+ """ Test IPParamStmt initialization
+ """
+ param = 'OF'
+ for val in [0.0, -3.4567]:
+ stmt = OFParamStmt(param, val, val)
+ assert_equal(stmt.param, param)
+ assert_equal(stmt.a, val)
+ assert_equal(stmt.b, val)
+
def test_OFParamStmt_dump():
""" Test OFParamStmt to_gerber()
"""
@@ -105,7 +149,7 @@ def test_OFParamStmt_dump():
def test_LPParamStmt_factory():
- """ Test LPParamStmt factory correctly handles parameters
+ """ Test LPParamStmt factory
"""
stmt = {'param': 'LP', 'lp': 'C'}
lp = LPParamStmt.from_dict(stmt)
@@ -128,7 +172,7 @@ def test_LPParamStmt_dump():
def test_INParamStmt_factory():
- """ Test INParamStmt factory correctly handles parameters
+ """ Test INParamStmt factory
"""
stmt = {'param': 'IN', 'name': 'test'}
inp = INParamStmt.from_dict(stmt)
@@ -143,7 +187,7 @@ def test_INParamStmt_dump():
def test_LNParamStmt_factory():
- """ Test LNParamStmt factory correctly handles parameters
+ """ Test LNParamStmt factory
"""
stmt = {'param': 'LN', 'name': 'test'}
lnp = LNParamStmt.from_dict(stmt)
generated by cgit (git 2.34.1) at 2024-11-23 18:03:31 +0000