460 lines
14 KiB
Python
460 lines
14 KiB
Python
# PadArray.py
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#
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# Copyright 2014 john <john@johndev>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301, USA.
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#
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#
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from __future__ import division
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import math
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import pcbnew
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class PadMaker(object):
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"""!
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Useful construction functions for common types of pads, providing
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sensible defaults for common pads.
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"""
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def __init__(self, module):
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"""!
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@param module: the module the pads will be part of
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"""
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self.module = module
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def THPad(self, Vsize, Hsize, drill, shape=pcbnew.PAD_SHAPE_OVAL,
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rot_degree = 0):
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"""!
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A basic through-hole pad of the given size and shape
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@param Vsize: the vertical size of the pad
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@param Hsize: the horizontal size of the pad
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@param drill: the drill diameter
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@param shape: the shape of the pad
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@param rot_degree: the pad rotation, in degrees
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"""
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pad = pcbnew.D_PAD(self.module)
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pad.SetSize(pcbnew.wxSize(Hsize, Vsize))
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pad.SetShape(shape)
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pad.SetAttribute(pcbnew.PAD_ATTRIB_STANDARD)
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pad.SetLayerSet(pad.StandardMask())
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pad.SetDrillSize(pcbnew.wxSize(drill, drill))
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pad.SetOrientation(rot_degree*10) # rotation is in 0.1 degrees
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return pad
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def THRoundPad(self, size, drill):
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"""!
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A round though-hole pad. A shortcut for THPad()
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@param size: pad diameter
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@param drill: drill diameter
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"""
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pad = self.THPad(size, size, drill, shape=pcbnew.PAD_SHAPE_CIRCLE)
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return pad
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def NPTHRoundPad(self, drill):
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"""!
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A round non-plated though hole (NPTH)
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@param drill: the drill diameter (equals the NPTH diameter)
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"""
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pad = pcbnew.D_PAD(self.module)
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pad.SetSize(pcbnew.wxSize(drill, drill))
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pad.SetShape(pcbnew.PAD_SHAPE_CIRCLE)
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pad.SetAttribute(pcbnew.PAD_ATTRIB_HOLE_NOT_PLATED)
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pad.SetLayerSet(pad.UnplatedHoleMask())
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pad.SetDrillSize(pcbnew.wxSize(drill, drill))
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return pad
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def SMDPad(self, Vsize, Hsize, shape=pcbnew.PAD_SHAPE_RECT, rot_degree=0):
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"""
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Create a surface-mount pad of the given size and shape
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@param Vsize: the vertical size of the pad
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@param Hsize: the horizontal size of the pad
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@param drill: the drill diameter
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@param shape: the shape of the pad
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@param rot_degree: the pad rotation, in degrees
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"""
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pad = pcbnew.D_PAD(self.module)
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pad.SetSize(pcbnew.wxSize(Hsize, Vsize))
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pad.SetShape(shape)
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pad.SetAttribute(pcbnew.PAD_ATTRIB_SMD)
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pad.SetLayerSet(pad.SMDMask())
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pad.SetOrientation(rot_degree*10) # rotation is in 0.1 degrees
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return pad
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def SMTRoundPad(self, size):
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"""!
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A round surface-mount pad. A shortcut for SMDPad()
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@param size: pad diameter
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"""
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pad = self.SMDPad(size, size, shape=pcbnew.PAD_SHAPE_CIRCLE)
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return pad
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class PadArray(object):
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"""!
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A class to assist in creating repetitive grids of pads
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Generally, PadArrays have an internal prototypical pad, and copy this
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for each pad in the array. They can also have a special pad for the
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first pad, and a custom function to name the pad.
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Generally, PadArray is used as a base class for more specific array
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types.
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"""
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def __init__(self, pad):
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"""!
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@param pad: the prototypical pad
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"""
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self.firstPadNum = 1
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self.pinNames = None
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# this pad is more of a "context", we will use it as a source of
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# pad data, but not actually add it
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self.pad = pad
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self.firstPad = None
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def SetPinNames(self, pinNames):
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"""!
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Set a name for all the pins. If given, this overrides the
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naming function.
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@param pinNames: the name to use for all pins
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"""
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self.pinNames = pinNames
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def SetFirstPadType(self, firstPad):
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"""!
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If the array has a different first pad, this is the pad that
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is used
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@param firstPad: the prototypical first pad
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"""
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self.firstPad = firstPad
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def SetFirstPadInArray(self, fpNum):
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"""!
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Set the numbering for the first pad in the array
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@param fpNum: the number for the first pad
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"""
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self.firstPadNum = fpNum
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def AddPad(self, pad):
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"""!
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Add a pad to the array, under the same moodule as the main
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prototype pad
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@param pad: pad to add
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"""
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self.pad.GetParent().Add(pad)
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def GetPad(self, is_first_pad, pos):
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"""!
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Get a pad in the array with the given position
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@param is_first_pad: use the special first pad if there is one
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@param pos: the pad position
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"""
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if (self.firstPad and is_first_pad):
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pad = self.firstPad
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else:
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pad = self.pad
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# create a new pad with same characteristics
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pad = pad.Duplicate()
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pad.SetPos0(pos)
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pad.SetPosition(pos)
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return pad
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def GetName(self, *args, **kwargs):
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"""!
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Get the pad name from the naming function, or the pre-set
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pinNames parameter (set with SetPinNames)
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"""
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if self.pinNames is None:
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return self.NamingFunction(*args, **kwargs)
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return self.pinNames
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def NamingFunction(self, *args, **kwargs):
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"""!
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Implement this as needed for each array type
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"""
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raise NotImplementedError;
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class PadGridArray(PadArray):
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"""!
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A basic grid of pads
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"""
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def __init__(self, pad, nx, ny, px, py, centre=pcbnew.wxPoint(0, 0)):
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"""!
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@param pad: the prototypical pad of the array
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@param nx: number of pads in x-direction
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@param ny: number of pads in y-direction
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@param px: pitch in x-direction
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@param py: pitch in y-direction
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@param centre: array centre point
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"""
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super().__init__(pad)
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self.nx = int(nx)
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self.ny = int(ny)
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self.px = px
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self.py = py
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self.centre = centre
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def AlphaNameFromNumber(self, n, aIndex=1,
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alphabet="ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
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"""!
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Utility function to generate an alphabetical name:
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eg. 1 - A, 2 - B, 26 - AA, etc
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@param aIndex: index of 'A': 0 for 0 - A
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@param n: the pad index
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@param alphabet: set of allowable chars if not A-Z,
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e.g. ABCDEFGHJKLMNPRTUVWY for BGA
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"""
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div, mod = divmod(n - aIndex, len(alphabet))
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alpha = alphabet[mod]
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if div > 0:
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return self.AlphaNameFromNumber(div, aIndex, alphabet) + alpha
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return alpha
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def NamingFunction(self, x, y):
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"""!
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Implementation of the naming function: right to left, top-to-bottom
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@param x: the pad x index
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@param y: the pad y index
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"""
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return self.firstPadNum + (self.nx * y + x)
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#relocate the pad and add it as many times as we need
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def AddPadsToModule(self, dc):
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"""!
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Create the pads and add them to the module in the correct positions
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@param dc: the drawing context
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"""
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pin1posX = self.centre.x - self.px * (self.nx - 1) / 2
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pin1posY = self.centre.y - self.py * (self.ny - 1) / 2
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for x in range(0, self.nx):
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posX = pin1posX + (x * self.px)
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for y in range(self.ny):
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posY = pin1posY + (self.py * y)
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pos = dc.TransformPoint(posX, posY)
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pad = self.GetPad(x == 0 and y == 0, pos)
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pad.SetName(self.GetName(x,y))
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self.AddPad(pad)
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class EPADGridArray(PadGridArray):
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"""!
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A pad grid array with a fixed name, used for things like thermal
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pads and via grids.
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"""
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def NamingFunction(self, nx, ny):
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"""!
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Simply return the firstPadNum
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@param nx: not used
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@param ny: not used
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"""
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return self.firstPadNum
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class PadZGridArray(PadArray):
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"""!
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A staggered pin array
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"""
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def __init__(self, pad, pad_count, line_count, line_pitch,
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pad_pitch, centre=pcbnew.wxPoint(0, 0)):
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"""!
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@param pad: the prototypical pad
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@param pad_count: total pad count
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@param line_count: number of staggered lines
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@param line_pitch: distance between lines
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@param pad_pitch: distance between pads in a line
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@param centre: array centre point
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"""
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super().__init__(pad)
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self.pad_count = int(pad_count)
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self.line_count = int(line_count)
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self.line_pitch = line_pitch
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self.pad_pitch = pad_pitch
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self.centre = centre
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def NamingFunction(self, pad_pos):
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"""!
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Naming just increased with pad index in array
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"""
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return self.firstPadNum + pad_pos
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def AddPadsToModule(self, dc):
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"""!
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Create the pads and add them to the module in the correct positions
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@param dc: the drawing context
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"""
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pin1posX = self.centre.x - self.pad_pitch * (self.pad_count - 1) / 2
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pin1posY = self.centre.y + self.line_pitch * (self.line_count - 1) / 2
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line = 0
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for padnum in range(0, self.pad_count):
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posX = pin1posX + (padnum * self.pad_pitch)
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posY = pin1posY - (self.line_pitch * line)
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pos = dc.TransformPoint(posX, posY)
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pad = self.GetPad(padnum == 0, pos)
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pad.SetName(self.GetName(padnum))
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self.AddPad(pad)
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line += 1
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if line >= self.line_count:
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line = 0
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class PadLineArray(PadGridArray):
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"""!
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Shortcut cases for a single-row grid array. Can be used for
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constructing sections of larger footprints.
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"""
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def __init__(self, pad, n, pitch, isVertical,
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centre=pcbnew.wxPoint(0, 0)):
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"""!
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@param pad: the prototypical pad
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@param n: number of pads in array
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@param pitch: distance between pad centres
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@param isVertical: horizontal or vertical array (can also use the
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drawing contexts transforms for more control)
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@param centre: array centre
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"""
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if isVertical:
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super().__init__(pad, 1, n, 0, pitch, centre)
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else:
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super().__init__(pad, n, 1, pitch, 0, centre)
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class PadCircleArray(PadArray):
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"""!
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Circular pad array
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"""
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def __init__(self, pad, n, r, angle_offset=0, centre=pcbnew.wxPoint(0, 0),
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clockwise=True, padRotationEnable=False, padRotationOffset=0):
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"""!
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@param pad: the prototypical pad
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@param n: number of pads in array
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@param r: the circle radius
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@param angle_offset: angle of the first pad
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@param centre: array centre point
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@param clockwise: array increases in a clockwise direction
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@param padRotationEnable: also rotate pads when placing
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@param padRotationOffset: rotation of first pad
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"""
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super().__init__(pad)
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self.n = int(n)
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self.r = r
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self.angle_offset = angle_offset
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self.centre = centre
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self.clockwise = clockwise
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self.padRotationEnable = padRotationEnable
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self.padRotationOffset = padRotationOffset
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def NamingFunction(self, n):
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"""!
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Naming around the circle, CW or CCW according to the clockwise flag
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"""
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return str(self.firstPadNum + n)
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def AddPadsToModule(self, dc):
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"""!
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Create the pads and add them to the module in the correct positions
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@param dc: the drawing context
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"""
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for pin in range(0, self.n):
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angle = self.angle_offset + (360 / self.n) * pin
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if not self.clockwise:
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angle = -angle
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pos_x = math.sin(angle * math.pi / 180) * self.r
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pos_y = -math.cos(angle * math.pi / 180) * self.r
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pos = dc.TransformPoint(pos_x, pos_y)
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pad = self.GetPad(pin == 0, pos)
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padAngle = self.padRotationOffset
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if self.padRotationEnable:
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padAngle -=angle
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pad.SetOrientation(padAngle*10)
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pad.SetName(self.GetName(pin))
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self.AddPad(pad)
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class PadCustomArray(PadArray):
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"""!
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Layout pads according to a custom array of [x,y] data
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"""
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def __init__(self, pad, array):
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"""!
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@param pad: the prototypical pad
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@param array: the position data array
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"""
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super().__init__(pad)
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self.array = array
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def NamingFunction(self, n):
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"""!
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Simple increment along the given array
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@param n: the pad index in the array
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"""
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return str(self.firstPadNum + n)
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def AddPadsToModule(self, dc):
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"""!
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Create the pads and add them to the module in the correct positions
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@param dc: the drawing context
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"""
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for i in range(len(self.array)):
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pos = dc.TransformPoint(self.array[i][0], self.array[i][1])
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pad = self.GetPad(i == 0, pos)
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pad.SetName(self.GetName(i))
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self.AddPad(pad)
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