- Start the new project by creating an empty directory. Start - gschem with an empty design and save it in the project directory. - Place the following symbols and edit/add these attributes: + Start the new project by creating an empty directory. Draw + the schematics with any schematics editor supported by pcb-rnd and + save it in this new directory. On the schematics + place the following symbols and edit/add these attributes:
Arrange and connect the pins as shown below. @@ -22,75 +23,23 @@
- Save the design as 7805.sch. -
- We are going to use a Makefile in this example to demonstrate - how to automate certain steps. In a fully automated project all - data exchange between the various tools (schematics editor, pcb-rnd, - simulators, etc.) is done by scripts. Generating the documentation - and exporting various other output like gerbers are usually automated - the same way. (As an alternative, all these can be done manually, from - the GUI as well.) -
- Create a new file called Makefile and edit it using your favorite text - editor to the following: -
-7805.lht: 7805.sch - gsch2pcb-rnd -m import 7805.sch -clean: - rm -f 7805.cmd --
- The first rule calls the forward annotation utility, gsch2pcb-rnd to - create a forward annotation command file called 7805.cmd when the - schematics file is newer than the layout file (7805.lht). The second - rule removes such a command file to make the directory clean of - auto-generated temporary files. +
+Depending on the schematics capture software you choose, you may need to +export a netlist that can be imported in pcb-rnd. +
+TODO: create a pool node on this -
- The layout process usually starts when there's at least a partially - finished schematics is available. The most common workflow is that - changes and improvements in the schematics are forward annotated to - the layout. -
- Start pcb-rnd. This will load the system-installed template board - as a new, empty design. Save it in the project directory as 7805.lht. -
- Start a shell (but don't close pcb-rnd); in the project directory, - type make. This will create 7805.cmd that contains a pcb-rnd - action script that can sync a board to the information extracted from - the schematics. -
- Back in pcb-rnd, type ":ExecuteFile(7805.cmd)" and press enter. The colon - will open the CLI entry where the ExecuteFile(filename) is an action that - will load the file named and execute each line as an action. -
- At the end of the process, the layout should have all footprints. Press - 'o' and the logical connections will show up as a "rats nest". +
+Please follow the tEDAx netlist +tutorial from step2 for laying out the board. -
- Move the subcircuits around. Pressing 'o' after some moves will re-optimize - the rats. As rats nest gets simpler and simpler, this can help choosing - the best placement. All components started out on the component (top) side. - Hover the mouse over the 0805 capacitors and press 'b' - this will send - them to the solder side. -
- After the placement, pick the solder layer to draw on and use the line tool - to draw the traces. Change the style to 'Power' or 'Fat' to get wider - traces. Press 'o' after drawing a few connections. When only the ground - network is left, use the rectangle tool to draw a large polygon on the - solder-gnd layer. Use the thermal tool to connect pins to the ground polygon. - The thermal tool does not work on SMD pads, they need to be connected using - lines. -
- When everything is connected, pressing 'o' will remove the last rat line. - The message log window also shows how many rats are remaining when 'o' - is pressed. The message log can be opened using the - Window/Message Log menu. +
+If you need to change the schematics later, re-export it from the schematics +editor and re-import it from pcb-rnd. If the format included importing +footprints, all new footprints will be imported. The netlist will be updated. +press {c r} after the import and update the board to reflect schematics changes. -
Index: 7805/sch.png =================================================================== Cannot display: file marked as a binary type. svn:mime-type = application/octet-stream Index: 7805/sch.png =================================================================== --- 7805/sch.png (nonexistent) +++ 7805/sch.png (revision 24786) Property changes on: 7805/sch.png ___________________________________________________________________ Added: svn:mime-type ## -0,0 +1 ## +application/octet-stream \ No newline at end of property