PCBNEW: Schematic Implementation



4 - Schematic Implementation

4.1 - Linking the Schematic to the Printed Circuit

The schematic is linked to PCBNEW by means of the Netlist file, which is normally generated by the schematic program used.
Note: PCBNEW accepts Netlist files with the EESchema or ORCAD PCB 2 formats.
The Netlist file initially generated is usually incomplete as there has been no assignment of the modules that correspond to the various components used in the schematic. Consequently an intermediate stage is necessary, the generation of the file of association components/modules.
CVPCB is used to create this file which is named * .CMP.
CVPCB also updates the Netlist file using this information.
PCBNEW reads the modified Netlist file * .NET and, if it exists, the file * .CMP.
In the event of a module being changed directly in PCBNEW the * .CMP file is automatically updated so avoiding the requirement to run CVPCB again.

4.2 - Procedure for Creating the Printed Circuit

After having created the required schematic:
PCBNEW will then load automatically all the modules.
The modules can now be placed manually or automatically on the board and and the tracks routed.

4.3 - Procedure for Updating the Printed Circuit

If the schematic is modified, the following steps must be repeated:
PCBNEW will then load automatically any new modules, add the new connections and remove redundant connections.



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