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add more ngspice_get_value info

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Luke Harold Miles 2024-02-13 09:40:42 -08:00
parent af5df351a6
commit ed3aff9179
1 changed files with 10 additions and 0 deletions
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doc/xschem_man/tutorial_ngspice_backannotation.html
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@ -134,6 +134,16 @@ write cmos_example.raw
component, but does not need to be attached to any specific point or wire.
Edit its attributes and set its <kbd>node</kbd> attribute to an existing saved variable in the raw file.
</p>
<p><b><kbd>ngspice_get_value.sym</kbd> debugging tips:</b></p>
<ul>
<li>See all available devices in ngspice with <kbd>display</kbd></li>
<li>See all values for a device with <kbd>print @somedevice</kbd></li>
<ul><li>eg <kbd>print @m.xm6.xmain1.msky130_fd_pr__nfet_g5v0d16v0__base[vth]</kbd></li></ul>
<li><b>Some values must explicitly be saved</b> before the analysis to be available for annotation.</li>
<ul><li>eg <kbd>save @m.xm6.xmain1.msky130_fd_pr__nfet_g5v0d16v0__base[vth]</kbd></li></ul>
<li>Usually you'll need to wrap your value with <kbd>v()</kbd> in the symbol properties in xschem.</li>
<ul><li>eg <kbd>node=v(@m.xm6.xmain1.msky130_fd_pr__nfet_g5v0d16v0__base[vth])</kbd></li></ul>
</ul>
<img src="backannotation9.png">
<p>
Run again the simulation and the <kbd>xschem annotate_op</kbd> command and values will be updated.