kicad-developers team mailing list archive

[Jeff Young <jeff@xxxxxxxxx>]

I got tired of my text editor not highlighting matching parens so there’s now a basic rule editor in Board Setup > Design Rules > Rules.

> On 16 May 2020, at 17:02, Jon Evans <jon@xxxxxxxxxxxxx> wrote:
> 
> Thanks Jeff, this is awesome.  I look forward to trying it out.
> 
> On Sat, May 16, 2020 at 12:00 PM Jeff Young <jeff@xxxxxxxxx <mailto:jeff@xxxxxxxxx>> wrote:
> 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 <jeff@xxxxxxxxx <mailto:jeff@xxxxxxxxx>> 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 <https://launchpad.net/~kicad-developers>
>> Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx <mailto:kicad-developers@xxxxxxxxxxxxxxxxxxx>
>> Unsubscribe : https://launchpad.net/~kicad-developers <https://launchpad.net/~kicad-developers>
>> More help   : https://help.launchpad.net/ListHelp <https://help.launchpad.net/ListHelp>
> 
> _______________________________________________
> Mailing list: https://launchpad.net/~kicad-developers <https://launchpad.net/~kicad-developers>
> Post to     : kicad-developers@xxxxxxxxxxxxxxxxxxx <mailto:kicad-developers@xxxxxxxxxxxxxxxxxxx>
> Unsubscribe : https://launchpad.net/~kicad-developers <https://launchpad.net/~kicad-developers>
> More help   : https://help.launchpad.net/ListHelp <https://help.launchpad.net/ListHelp>