def parse_gerber(filename):
info("parsing gerber file \"" + filename + "\"...")
#global units
#global zero_suppression_mode
#global coordinate_mode
#global layer_polarity
#global x_format
#global y_format
#global number_of_digits
#global ratio
global decimal_places # fixme - a bit funny if this changes between gerbers we're reading
zero_suppression_mode = "leading"
coordinate_mode = "absolute"
layer_polarity = "dark"
x_format = "55"
y_format = "55"
#units = "mm"
lines = []
for line in open(filename):
line = line.rstrip("\n\r")
lines.append(line)
gerber_instructions = []
global apertures
apertures = {}
aperture = "00"
matched_units = 0
matched_format = 0
set_ratio = 0
#gerber_instructions.append("hi there")
for line in lines:
matches = 0
match = re.search("^%MO([IM][NM])\*%$", line)
if match:
matches = matches + 1
if (match.group(1) == "IN"):
#debug("set units to inches: " + line)
ratio = 1000.0 / 25.4 / 1.55 # fixme/todo: 1.55 is a magic number here
else:
#debug("set units to mm: " + line)
ratio = 1.0
matched_units = 1
match = re.search("^%FS([LTD])([AI])X([0-9][0-9])Y([0-9][0-9])\*%$", line)
if match:
matches = matches + 1
debug("set format: " + line)
if (match.group(1) == "L"):
zero_suppression_mode = "leading"
else:
zero_suppression_mode = "trailing"
if (match.group(2) == "A"):
coordinate_mode = "absolute"
else:
coordinate_mode = "incremental"
x_format = match.group(3)
y_format = match.group(4)
decimal_places = int(x_format[1])
number_of_digits = int(x_format[0]) + int(x_format[1])
number_of_digits = number_of_digits + 1 # some gerber files output 7 digits for "24" format...
#decimal_places = decimal_places + 1
debug("number of digits to use for coordinates = " + str(number_of_digits))
matched_format = 1
match = re.search("^%ADD([0-9]+)C,([.0-9]+)\*%$", line) # %ADD010C,0.0254*%
if match:
matches = matches + 1
#aperture_length = len(match.group(1))
ap = int(match.group(1))
apertures[ap] = ("C", float(match.group(2)), float(match.group(2)))
debug("aperture definition: " + line)
match = re.search("^%ADD([0-9]+)R,([.0-9]+)X([.0-9]+)\*%$", line) # %ADD028R,2.6X1.6*% or %ADD34R,0.0138X0.0472*%
if match:
matches = matches + 1
ap = int(match.group(1))
apertures[ap] = ("R", float(match.group(2)), float(match.group(3)))
debug("aperture definition: " + line)
match = re.search("^%ADD([0-9]+)O,([.0-9]+)X([.0-9]+)\*%$", line) # %ADD11O,0.0138X0.0669*%
if match:
matches = matches + 1
ap = int(match.group(1))
apertures[ap] = ("O", float(match.group(2)), float(match.group(3)))
debug("aperture definition: " + line)
match = re.search("^%LN([a-zA-Z0-9]+)\*%$", line)
if match:
matches = matches + 1
gerber_instructions.append("setlayer" + match.group(1))
match = re.search("^(G0[1-3])\*$", line)
if match:
matches = matches + 1
gerber_instructions.append(match.group(1))
match = re.search("^(G0[1-3][XY].*)\*$", line)
if match:
matches = matches + 1
gerber_instructions.append(match.group(1))
match = re.search("^([XY].*)\*$", line)
if match:
matches = matches + 1
#debug(line)
gerber_instructions.append(match.group(1))
match = re.search("^(G54D)([0-9]+)\*$", line)
if match:
matches = matches + 1
debug("aperture selection: " + match.group(2))
gerber_instructions.append(match.group(1) + match.group(2))
#debug(match.group(1))
match = re.search("^%LP([DC])\*%$", line)
if match:
# this unfortunately only grabs the last instance...
matches = matches + 1
if (match.group(1) == "D"):
layer_polarity = "dark"
else:
layer_polarity = "clear"
match = re.search("^%IPNEG\*%$", line) # %IPNEG% = reverse whole layer
if match:
matches = matches + 1
# do something here for this...
match = re.search("^%IPPOS\*%$", line) # %IPPOS% = whole layer normal
if match:
matches = matches + 1
match = re.search("^G04.*$", line)
if match:
matches = matches + 1
match = re.search("^%$", line)
if match:
matches = matches + 1
match = re.search("^\*$", line)
if match:
matches = matches + 1
match = re.search("^G74\*$", line)
if match:
warning("cannot handle single quadrant G74 mode")
matches = matches + 1
#exit()
match = re.search("^G75\*$", line) # multi-quadrant mode
if match:
matches = matches + 1
match = re.search("^$", line)
if match:
matches = matches + 1
match = re.search("^M02\*$", line) # M02* = end of job
if match:
matches = matches + 1
match = re.search("^%AM(.*)\*$", line) # AM = aperture macro definition
if match:
matches = matches + 1
warning("ignoring aperture macro \"" + match.group(1) + "\"")
match = re.search("^([$0-9]*),", line) # aperture macro definition continuation
if match:
matches = matches + 1
match = re.search("^%AD(.*)\*$", line) # AD = aperture macro instantiation
if match:
matches = matches + 1
error("aperture instantiation \"" + match.group(1) + "\" ignored - this part needs to be coded")
match = re.search("^%IN(.*)\*%$", line) # IN = image name
if match:
matches = matches + 1
debug("ignoring image name \"" + match.group(1) + "\"")
if (matches == 0):
warning("did not parse \"" + line + "\"")
if (set_ratio == 0) and (matched_units == 1) and (matched_format == 1):
ratio = ratio / (10.0**int(decimal_places))
debug("ratio = " + str(ratio))
gerber_instructions.append("setratio" + str(ratio))
set_ratio = 1
if (matched_format == 0):
error("did not find format line", 2)
for aperture in apertures:
(CROP, w, h) = apertures[aperture]
debug("aperture[" + str(aperture) + "]: " + CROP + " " + str(w) + " " + str(h))
#debug("units: " + units)
debug("x_format: " + x_format)
debug("y_format: " + y_format)
debug("layer_polarity: " + layer_polarity)
debug("zero_suppression_mode: " + zero_suppression_mode)
debug("coordinate_mode: " + coordinate_mode)
return gerber_instructions
def draw_gerber_layer(parent_object, gerber_instructions, layer_name, color = "#000000", stroke_width = laser_stroke_width):
layer = add_layer(parent_object, layer_name)
overall_layer = layer
group = add_group(layer, color=color, stroke_width=stroke_width)
#group.stroke(color=color, width=float(stroke_width), miterlimit=4, opacity=1)
#group.dasharray("none")
#group.fill("none")
debug2("instructions:")
x = 0
y = 0
x_old = 0
y_old = 0
x_string = "0"
y_string = "0"
i_string = "0"
d_string = "02" # pen up
i = 0
j = 0
aperture = "00"
mode = "linear"
ratio = 5.0
#global verbosity
#verbosity = 4
for instruction in gerber_instructions:
debug("instruction: " + instruction)
match = re.search("^setratio([.0-9]*[e]*[-0-9]*)$", instruction)
if match:
ratio = float(match.group(1))
debug("found ratio: " + str(ratio))
match = re.search("^setlayer(.*)$", instruction)
if match:
layer_name = match.group(1)
layer = add_layer(overall_layer, layer_name)
group = add_group(layer, color=color, stroke_width=stroke_width)
match = re.search("^G54D([1-9][0-9])$", instruction) # "G54D22" means follow the goto X,Y instructions after this line, and flash the D22 aperture every time we get a D03 ("flash aperture") command
if match:
debug("aperture selection: " + match.group(1))
aperture = int(match.group(1))
if not aperture in apertures.keys():
error("can't find aperture #" + str(aperture), 4)
(CROP, w, h) = apertures[aperture]
w = 25.4 * w # fixme/todo: magic number here
h = 25.4 * h # fixme/todo: magic number here
debug("aperture[" + str(aperture) + "]: " + CROP + " " + str(w) + " " + str(h))
d_string = "04" # skip doing anything this pass through the following code
match = re.search("^G(0[0-3])(.*)$", instruction)
if match:
instruction = match.group(2)
#debug2("remaining instruction: " + instruction)
if (match.group(1) == "01"):
mode = "linear"
debug("mode = linear")
elif (match.group(1) == "02"):
mode = "cc_arc"
debug("mode = cc arc")
elif (match.group(1) == "03"):
mode = "cw_arc"
debug("mode = cw arc")
else:
error("?", 3)
match = 1
while match:
#match = re.search("^([XYIJ])([-0-9]{1," + str(number_of_digits) + "})(.*)$", instruction)
match = re.search("^([XYIJ])([-0-9]{1,10})(.*)$", instruction)
if match:
instruction = match.group(3)
#debug2("remaining instruction: " + instruction)
if (match.group(1) == "X"):
x_string = match.group(2)
x = +int(x_string) * ratio
elif (match.group(1) == "Y"):
y_string = match.group(2)
y = +int(y_string) * ratio
elif (match.group(1) == "I"):
i_string = match.group(2)
i = +int(i_string) * ratio
elif (match.group(1) == "J"):
j_string = match.group(2)
j = +int(j_string) * ratio
match = re.search("^D(0[1-3])$", instruction)
if match:
d_string = match.group(1)
if (d_string == "01"): # pen down
debug(" " + x_string + " " + y_string + " " + d_string)
if (mode == "linear"):
group.add(svg.line( (x_old,y_old), (x,y) ))
#debug("(" + str(x_old) + "," + str(y_old) + ") -> (" + str(x) + "," + str(y) + ") with pen down")
else:
# PADS: "G03X58250I-3315J-5D01*" or "G03X201969Y117031I0J-1969D01*"
# altium: "G03*", then "X-1778Y-10160I2540J0D01*"
radius = math.sqrt(i**2+j**2)
delta_x = x - x_old
delta_y = y - y_old
x_center = x_old + i
y_center = y_old + j
debug("old(" + str(x_old) + "," + str(y_old) + ") -> xy(" + str(x) + "," + str(y) + ") -> ij(" + str(i) + "," + str(j) + ") -> center(" + str(x_center) + "," + str(y_center) + ")")
#debug("(x,y,i,j) = (" + str(x) + "," + str(y) + "," + str(i) + "," + str(j) + ")")
if (mode == "cc_arc"):
#debug("cw arc here")
# from http://stackoverflow.com/questions/25019441/arc-pie-cut-in-svgwrite
# dwg.path(d="M {0},{1} l {2},{3} a {4},{4} 0 0,0 {5},{6} z".format(start_x, start_y, m0, n0, radius, m1, n1),
# M=moveto, L=lineto, a=arc?, z=close path
# a: (rx ry x-axis-rotation large-arc-flag sweep-flag x y)
string = "M {0},{1} a {2},{2} 0 0,0 {3},{4}".format(x_old, y_old, radius, delta_x, delta_y)
elif (mode == "cw_arc"):
string = "M {0},{1} a {2},{2} 0 0,1 {3},{4}".format(x_old, y_old, radius, delta_x, delta_y)
else:
error("?", 4)
#group.add(svg.circle( (x_center,y_center), radius, fill="none" ))
#group.add(svg.line( (x_old, y_old), (x, y) ))
debug(string)
group.add(svg.path(d=string, fill="none"))
elif (d_string == "02"):
pass
# maybe change to a new group here?
elif (d_string == "03"):
if (aperture == 0):
warning("unhandled D03 flash operation")
else:
t = laser_stroke_width / 2.0
#x = x / 1.5
#y = y / 1.5
debug("flashing aperture[" + str(aperture) + "]: " + CROP + " " + str(w) + " " + str(h) + " at (" + str(x) + "," + str(y) + ")")
if (CROP == "R"):
group.add(svg.rect( (x-w/2.0+t,y-h/2.0+t), (w-2*t,h-2*t) ))
# should add a special case here for O (oval) and make a rectangle and two half-circles
elif (d_string == "04"):
pass # silently fall thorough, otherwise G54D commands trigger output the first pass through
else:
error("unknown d string", 5)
x_old = x
y_old = y
return overall_layer
panel_frame_thickness = 10.0 # mm - overall border thickness
#panel_tab_length = 7.0 # mm
#panel_tab_width = 2.0 # mm
x_gap_between_instances_of_boards = 5.0 # mm
y_gap_between_instances_of_boards = 5.0 # mm
#stencil_half_moon_location = "NorthSouth"
stencil_half_moon_location = "EastWest"
number_of_extra_half_moons_per_side = 1
protoboard_width = 151 # should measure this width so that the mirror-image ends up in the right place
protoboard_height = 151
if (fill_protoboard == 1):
number_of_horizontal_instances = int(math.floor(protoboard_width / board_width))
number_of_vertical_instances = int(math.floor(protoboard_height / board_height))
if (number_of_horizontal_instances < 1) or (number_of_vertical_instances < 1):
error("can't fit board on panel", 6)
panel_width = number_of_horizontal_instances * board_width
panel_height = number_of_vertical_instances * board_height
panel_width = panel_width + (number_of_horizontal_instances - 1) * x_gap_between_instances_of_boards
panel_height = panel_height + (number_of_horizontal_instances - 1) * y_gap_between_instances_of_boards
extra_x_offset = (protoboard_width - panel_width ) / 2.0
extra_y_offset = (protoboard_height - panel_height) / 2.0
panel_width = protoboard_width
panel_height = protoboard_height
else:
#extra_x_offset = x_gap_between_instances_of_boards # or 0.0/whatever
#extra_y_offset = y_gap_between_instances_of_boards # or 0.0/whatever
extra_x_offset = panel_frame_thickness # + panel_tab_length
extra_y_offset = panel_frame_thickness
panel_width = number_of_horizontal_instances * board_width + 2.0 * extra_x_offset
panel_height = number_of_vertical_instances * board_height + 2.0 * extra_y_offset