Dangling Via Report

Question

HI, 
 i want to find out the dangling via location by using cadence skill program. Can anyone please help me out. 
 prog; 
 procedure(chk() axlClearSelSet() axlSetFindFilter(?enabled `("NOALL" "VIAS") ?onButtons `("VIAS")) via_data = axlGetSelSet(axlAddSelectAll()) foreach(via_data_lp via_data if(via_data_lp->unconnected then print(via_data_lp->net->name) print(via_data_lp->xy) ) ) )

AsbjornEdvalds · Answer

Hi, 
 Like Luan said, you can get this report from the report menu. However, if you want to do this by using skill, you can use the axlDBGetConnect() command. 
 I.e. replace your 
 via_data_lp->unconnected 
 with 
 length(axlDBGetConnect(via_data_lp t))<2 
 which finds all vias with less than two connections

eDave · Answer

You have changed != to == so you will never see vias with a net. 
 Your simplified code would be: 
 foreach(via l_vias when(onep(length(axlDBGetConnect(via))) ; a lonely cline is connected to a via fprintf(repfile "Found Via with one connection at %L on a net %L 
" via->xy via->net->name) );end when );end foreach

eDave · Answer

Try this: foreach(via, l_vias n = length(axlDBGetConnect(via)) when(n < 2 ; Fewer than two clines are connected to a via viaPads = setof(pad, via ->pads, car(parseString(pad ->layer, "/")) == "ETCH" && pad ->type == "REGULAR") viaPadsInPlanes = setof(pad, viaPads, exists(shp, axlDBGetShapes(pad ->layer), shp ->net == via ->net && axlGeoPointInShape(via ->xy, shp))) n = n + length(viaPadsInPlanes) when(n < 2; Fewer than two clines or etch shapes are connected to a via pins = axlPinsOfNet(via ->net, 'pin) viaPads = setof(pad, viaPads, !member(pad, viaPadsInPlanes)) viaPadsInPinPads = setof(viaPad, viaPads, exists(pin, pins, axlGeoPointInShape(via ->xy, car(axlPolyFromDB(pin, ?layer viaPad ->layer, ?padType "REGULAR"))))) n = n + length(viaPadsInPinPads) when(n < 2; Fewer than two clines, etch shapes or pins are connected to a via printf("Found Via with one connection at %L on a net %L ", via->xy, via->net->name) ;fprintf(repfile "Found Via with one connection at %L on a net %L ", via->xy, via->net->name) ) ) );end when );end foreach

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