[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

Re: gEDA-user: gnetlist finding "U?"

Which symbol are you using for ground? DO NOT use ground.sym from the IEC417 library: it doesn't have proper attributes.

In fact, *never* use anything from the IEC417 library in a circuit. It's only good for abridged diagrams in documents. The "pins" generally represent ports, not node connections. Dangerous to newbies to have it in the standard distribution...

On Jan 7, 2006, at 11:42 AM, Jose, Marshall wrote:

I've grepped "U?" with no luck. The netlist reports node "U?-?" is connect to the ground node, to which a large number of other pins are connected.

I'm pretty sure it's related to a special object like a ground or io symbol, but I'm kinda fuzzy on how those should be created and treated.

There is the following code in s_net.c, which is one of the source files for gnetlist; I looked here for a clue, but I'm unfamiliar with the method gnetlist uses:
====================================================================== ========
/* apply the hierarchy name to the uref */
uref = s_hierarchy_create_uref(pr_current, temp_uref, hierarchy_tag);

    if (uref && pinnum) {
        string = (char *) malloc(sizeof(char) *
                                 strlen(uref) + strlen(pinnum) +
                                 strlen("  ") + 1);

sprintf(string, "%s %s", uref, pinnum);
} else {
if (pinnum) {
string = (char *) malloc(sizeof(char) *
strlen(pinnum) +
strlen("POWER") + strlen(" ") + 1);
sprintf(string, "POWER %s", pinnum);
} else {
string = (char *) malloc(sizeof(char) *
strlen("U?") + strlen("?") +
strlen(" ") + 1 + hierarchy_tag_len);

            if (hierarchy_tag) {
                misc =
                    s_hierarchy_create_uref(pr_current, "U?",
                                            hierarchy_tag);
                sprintf(string, "%s ?", misc);
                free(misc);
            } else {
                sprintf(string, "U? ?");
            }

fprintf(stderr, "Missing Attributes (refdes and pin number)\n");
}
}
====================================================================== ========

Marshall

-----Original Message-----
From: owner-geda-user@xxxxxxxx on behalf of John Doty
Sent: Sat 1/7/2006 1:33 PM
To: geda-user@xxxxxxxx
Subject: Re: gEDA-user: gnetlist finding "U?"

Try looking for U? with Attributes->Find Specific Text in gschem. Or
look for it in the file with a text editor.

The Missing Attributes message suggests you may find it useful to run
gsymcheck -vv over your symbol files.

On Jan 7, 2006, at 11:20 AM, Jose, Marshall wrote:

I'm getting the complaint "Missing Attributes (refdes and pin
number)" when I make a BOM with gnetlist, which is annoying enough.
But I'm also finding the node "U?-?" in my netlist when I run
gsch2pcb on the design. Curiously, "U?" is not found in the BOM list.

I'm looking for suggestions as to its cause at this point because
I've run out of clues. Any takers?

Marshall


John Doty              Noqsi Aerospace, Ltd.
jpd@xxxxxxxxxxxxx



<winmail.dat> 

John Doty              Noqsi Aerospace, Ltd.
jpd@xxxxxxxxxxxxx