P-Cell installation (FreePDK45)

Question

I am trying to make these instructions work. I am having some difficulties along the way, it would be of great help if you could point me to the right direction!

I have tried to follow the instructions in the web site. I did not quite understood the step 2 and 3.

add the Python path to the first line of each script in this directory

I am not sure which python path is this. Is this $PDK_DIR/ncsu_basekit/gentech/sshaft/bin? And after trying a while, it seemed have created a bin folder: $PDK_DIR/ncsu_basekit/gentech/bin and copied all *.py files here.

While updating the icoa_setup.csh, I have found that, I also needed to source the setup.csh file as well, otherwise the NCSU_TechLib_FreePDK45 or NCSU_Devices_FreePDK45 library do not load in Cadence Virtuoso.

Finally, when I run the command gentech.py -log gen.log from $PDK_DIR/ncsu_basekit/gentech, I am getting the following error:

/home/class/ahmed589/NCSU-FreePDK45-1.4/FreePDK45/ncsu_basekit/gentech/sshaft/bin/gentech.py: Permission denied

Probably because: the first line of the gentech.py is not an executable file, rather a folder

#!/home/class/ahmed589/NCSU-FreePDK45-1.4/FreePDK45/ncsu_basekit/gentech/sshaft/src/py/

if the line is changed to

#!/home/class/ahmed589/NCSU-FreePDK45-1.4/FreePDK45/ncsu_basekit/gentech/sshaft/src/py/gentech.py

then the following error message is found:

import: Command not found.
Badly placed ()'s.

Maybe the following info would be helpful:

• Operating system: Linux 2.6.32-573.3.1.el6.x86_64
• Cadence Virtuoso version 6.1.5
• oaGetVersion : 22.41.004
• Pycell studio version : 2014.09-L4 of PyCell Studio
• PyCell Studio build with Python version: 2.6.2 (r262:71600, Apr 7 2011, 14:30:04) [GCC 4.4.3]

Answer 1

The issue comes down you your misunderstanding of the instruction to "add the Python path to the first line of each script in this directory". This is the path to the Python executable which should be used in executing your scripts

The first line of your script should be changed from --

#!/home/class/ahmed589/NCSU-FreePDK45-1.4/FreePDK45/ncsu_basekit/gentech/sshaft/src/py/

-- to reference that path; which is likely to be the output of --

which python

-- e.g., --

#!/usr/bin/python