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/*
* layer.c - PCB layers on a pad
*
* Written 2009-2012 by Werner Almesberger
* Copyright 2009-2012 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/*
* We don't reject solder paste pads that don't cover anything yet.
* That way, things can be constructed step by step without getting blue
* screens all the time.
*/
#include <stdlib.h>
#include "error.h"
#include "overlap.h"
#include "inst.h"
#include "obj.h"
#include "layer.h"
/*
* Shorthands for the layers we use in a general sense.
*/
#define LAYER_COPPER_TOP (1 << layer_top)
#define LAYER_PASTE_TOP (1 << layer_paste_top)
#define LAYER_MASK_TOP (1 << layer_mask_top)
#define LAYER_COPPER_BOTTOM (1 << layer_bottom)
#define LAYER_PASTE_BOTTOM (1 << layer_paste_bottom)
#define LAYER_MASK_BOTTOM (1 << layer_mask_bottom)
/* ----- Conversion between pad types and layer sets ----------------------- */
layer_type pad_type_to_layers(enum pad_type type)
{
layer_type layers = 0;
switch (type) {
case pt_normal:
layers = LAYER_PASTE_TOP;
/* fall through */
case pt_bare:
layers |= LAYER_COPPER_TOP | LAYER_MASK_TOP;
break;
case pt_trace:
layers = LAYER_COPPER_TOP;
break;
case pt_paste:
layers = LAYER_PASTE_TOP;
break;
case pt_mask:
layers = LAYER_MASK_TOP;
break;
default:
abort();
}
return layers;
}
enum pad_type layers_to_pad_type(layer_type layers)
{
if (layers & LAYER_COPPER_TOP) {
if (layers & LAYER_PASTE_TOP)
return pt_normal;
if (layers & LAYER_MASK_TOP)
return pt_bare;
return pt_trace;
} else {
if (layers & LAYER_PASTE_TOP)
return pt_paste;
if (layers & LAYER_MASK_TOP)
return pt_mask;
abort();
}
}
const char *pad_type_name(enum pad_type type)
{
switch (type) {
case pt_normal:
return "normal";
case pt_bare:
return "bare";
case pt_trace:
return "trace";
case pt_paste:
return "paste";
case pt_mask:
return "mask";
default:
abort();
}
}
/* ----- layers in mechanical holes ---------------------------------------- */
layer_type mech_hole_layers(void)
{
return LAYER_MASK_TOP | LAYER_MASK_BOTTOM;
}
/* ----- Refine layers after instantiation --------------------------------- */
static int refine_overlapping(struct inst *copper, struct inst *other)
{
if (other->u.pad.layers & LAYER_PASTE_TOP) {
copper->u.pad.layers &= ~LAYER_PASTE_TOP;
if (!inside(other, copper)) {
fail("solder paste without copper underneath "
"(\"%s\" line %d, \"%s\" line %d)",
copper->u.pad.name, copper->obj->lineno,
other->u.pad.name, other->obj->lineno);
instantiation_error = other->obj;
return 0;
}
}
if (other->u.pad.layers & LAYER_MASK_TOP)
copper->u.pad.layers &= ~LAYER_MASK_TOP;
return 1;
}
static int refine_copper(const struct pkg *pkg_copper, struct inst *copper,
enum allow_overlap allow)
{
const struct pkg *pkg;
struct inst *other;
for (pkg = pkgs; pkg; pkg = pkg->next) {
/*
* Pads in distinct packages can happily coexist.
*/
if (pkg != pkgs && pkg_copper != pkgs && pkg_copper != pkg)
continue;
for (other = pkg->insts[ip_pad_copper]; other;
other = other->next)
if (copper != other && overlap(copper, other, allow)) {
fail("overlapping copper pads "
"(\"%s\" line %d, \"%s\" line %d)",
copper->u.pad.name, copper->obj->lineno,
other->u.pad.name, other->obj->lineno);
instantiation_error = copper->obj;
return 0;
}
for (other = pkg->insts[ip_pad_special]; other;
other = other->next)
if (overlap(copper, other, ao_none))
if (!refine_overlapping(copper, other))
return 0;
}
return 1;
}
static void mirror_layers(layer_type *layers)
{
if (*layers & LAYER_COPPER_TOP)
*layers |= LAYER_COPPER_BOTTOM;
if (*layers & LAYER_PASTE_TOP)
*layers |= LAYER_PASTE_BOTTOM;
if (*layers & LAYER_MASK_TOP)
*layers |= LAYER_MASK_BOTTOM;
}
int refine_layers(enum allow_overlap allow)
{
const struct pkg *pkg;
struct inst *copper;
for (pkg = pkgs; pkg; pkg = pkg->next)
for (copper = pkg->insts[ip_pad_copper]; copper;
copper = copper->next) {
if (!refine_copper(pkg, copper, allow))
return 0;
if (copper->u.pad.hole)
mirror_layers(&copper->u.pad.layers);
}
return 1;
}
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