Dangling Via Report

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

length(axlDBGetConnect(via_data_lp t))<2 using this code I was able to get the vias with single connection. When I try this code the dangling vias are getting deleted but some unintentional vias are also getting deleted. I want to find the list of dangling vias from the vias list and delete them.If any suggestions .Please help me.

foreach(via l_vias
    len = length(axlDBGetConnect(via)); connections connected to via
    if(len == 1 then ; checks if via has 1 connection
            if(via->net->name != nil then ;checks if via has net name
                  via_loc = via->xy
                  axlDeleteObject(via)
              );endif
       );endif
);end foreach

Hi, 

The DRC>0 condition is to only generate and show a window that shows the report "dangling_via_report" generated above. If there are no errors, there is no reason to show the file. 

The deleteFile can be found in the sklanguser documentation under the I/O and File Handling chapter. 

Hi,

I need to get dangling vias list same as the dangling vias quick report using allegro skill.I have below code but it's not working.I am new to skill Please help me.

foreach(via l_vias
len = length(axlDBGetConnect(via)); connections connected to via
;fprintf(repfile "Found Via %L with Net name %L connections %d\n" via->xy via->net->name len)
if(len == 1 then ; a lonely cline is connected to a via
conn_obj = car(axlDBGetConnect(via))
if(conn_obj->net->name == nil then
via_loc = via->xy
fprintf(repfile "Found Via with one connection at %L on a net %L \n" via_loc via->net->name)
;axlDeleteObject(via)
);endif
);endif
);end foreach

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 \n" via->xy via->net->name)
  );end when
);end foreach

Hi Dave,

I need to get dangling vias list same as it's generated using quick reports 

Using the above code I am able to get the vias with one connection, but some other vias are also getting listed apart from dangling vias list from quick reports.

how can we get the dangling vias list same as quick reports. Please suggest

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 \n", via->xy, via->net->name)
;fprintf(repfile "Found Via with one connection at %L on a net %L \n", via->xy, via->net->name)
)
)
);end when
);end foreach

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 \n", via->xy, via->net->name)
;fprintf(repfile "Found Via with one connection at %L on a net %L \n", via->xy, via->net->name)
)
)
);end when
);end foreach