On Thu, 2009-05-07 at 12:58 -0600, John Doty wrote: > > From my perspective, your use of these symbols to name nets seems > strange. I think of these as hierarchical connection devices. To name > a net it is simpler and less confusing to use the netname= attribute > rather than a symbol, I think. But it is again unclear what these > symbols were intended for by their original authors. >
At the beginning the existence on net and netname attribute was very confusing for me. Now I am using many in- out- io- and power-symbols with attributes like net=3.3V-plus:1 or net=ADC_D0 or Digital_In_Enable:1. Using such symbols makes it easy to move these nets around -- moving from one FPGA pin to another for better layout, or moving to another pin of a microcontroller because the pin used prior is needed for something other. Or for duplicating netnames. I think I can not do this with netname attribute in such an easy way. And I think it may happen that one deletes a net while modifying a schematic without noticing that one has deleted the netname= too. My impression was that attribute graphical=1 was for devices which should be not mounted on PCB, i.e. obsolete parts, external temperature sensors... Of course a very precise definition of attributes would be very important. Best regards Stefan Salewski _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
