Here’s a really dumb test file just so you can get an idea of what it looks like:
(version 1) (selector (match_netclass "Default") (rule "Big Gap")) (selector (match_type track) (rule "Big Gap")) (rule "Big Gap" (clearance 1.5)) (selector (match_type blind_via) (rule "Big Hole")) (rule "Big Hole" (hole 2)) (rule "Small Edge" (clearance 2)) (rule "Big Edge" (clearance 3)) (selector (match_type board_edge) (rule "Small Edge")) (selector (match_layer "In1.Cu") (match_type board_edge) (rule "Big Edge") (priority 2)) > On 16 May 2020, at 16:43, Jeff Young <j...@rokeby.ie> wrote: > > I’ve just merged a possible implementation of the DRC rules. I’d like to get > some feedback on it, and also some testing. (Because the rules support such > a wide range of possibilities it’s going to need a good deal of testing.) > > For now, it picks up DRC rules from a file named “drc-rules” in the project > directory. > > There’s no GUI editor at present: use a text editor. > > Grammar is s-expr. It generally follows the ideas set down here: > > https://docs.google.com/document/d/1qvCH9aHwCzp5qtKTna4jJXuloNU0b96gAxAHSKPuXpU > > <https://docs.google.com/document/d/1qvCH9aHwCzp5qtKTna4jJXuloNU0b96gAxAHSKPuXpU> > > with one major exception: I found the select-a-single-rule didn’t pan out. > You have to duplicate too much stuff in each rule for that. > > Also, because the DRC engine (and zone filler) don’t currently support > min/opt/max the prototype implements min with Seth’s “relaxed” option. > > Top level is a list; first expression must be (version x) followed by any > number of (selector…) and (rule…) expressions. > /* > * Match tokens: > * match_netclass > * match_type > * match_layer > * match_all > * match_area (not yet implemented with the exception of “$board”, which > matches everything) > * > * (selector (match_area "$board") (rule "OSHParkClass3") (priority 100)) > * > * (selector (match_netclass "HV") (rule "HV_internal")) > * (selector (match_netclass "HV") (match_layer "F_Cu") (rule > "HV_external")) > * (selector (match_netclass "HV") (match_layer "B_Cu") (rule > "HV_external")) > * > * (selector (match_netclass "HV") (match_netclass "HV") (rule "HV2HV")) > * (selector (match_netclass "HV") (match_netclass "HV") (match_layer > "F_Cu") (rule "HV2HV_external")) > * (selector (match_netclass "HV") (match_netclass "HV") (match_layer > "B_Cu") (rule "HV2HV_external")) > * > * TODO: pads for connector pins or wire pads have even larger required > creepage clearances. How to encode? > * User attributes on parent footprint? > * > * (selector (match_netclass "HV") (match_type "pad") (match_netclass > "HV") (match_type "pad") (rule "pad2PadHV")) > * > * (selector (match_netclass "signal") (match_area "BGA") (rule > "neckdown")) > * > * Type tokens: > * track > * via > * micro_via > * blind_via > * pad > * zone > * text > * graphic > * board_edge > * hole > * npth > * pth > * > * Rule tokens: > * allow (not yet implemented) > * clearance > * annulus_width > * track_width > * hole > * > * Rule modifiers: > * relaxed > * > * (rule "HV" (clearance 200) (priority 200)) > * (rule "HV_external" (clearance 400) (priority 200)) > * (rule "HV2HV" (clearance 200) (priority 200)) > * (rule "HV2HV_external" (clearance 500) (priority 200)) > * (rule "pad2padHV" (clearance 500) (priority 200)) > * > * (rule "signal" (clearance 20)) // implied > priority of 1 > * (rule "neckdown" (clearance relaxed 15) (priority 2)) > * > * (rule "allowMicrovias" (allow microvia)) > */ > > > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : kicad-developers@lists.launchpad.net > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp
_______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : kicad-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
