This is how QCA-LG can be used:

1. Get a netlist for your circuit in Gate or LSI format.
   • Example of a VHDL file: example.vhd.

     

     And the LSI file obtained with Synopsys tools: example.lsi.

     This is the library file that describes the logic gates available for synthesis: qca.lib. Please note that this library has to be compiled first, and to do it you must run Synopsys LC shell, open the library as a .LIB file and save it as .DB file, and that .DB file can then be used for synthesis.

   • Example of a BLIF file: simple2.blif.

     And the Gate file obtained with MVSIS tools: simple2.gate.

     This is the script used: script. These are the technology files used: qca.genlib, qca.super.

2. Feed the input file as stdin an receive the output file from stdout:

   • ./qca-lg < example.lsi > example.qca
   • ./qca-lg gate < simple2.gate > simple2.qca

3. The produced QCA files are layout blocks, and should be imported in QCADesigner (menu Tools -> Import Block...):

   • For the LSI input file: example.qca.

     

   • For the Gate input file: simple2.qca.

     

• Inverting gates are turned into non-inverting when they produce primary outputs. (On going work.)
• The via cells are not placed yet. So they have to be added manually to get the correct simulation results in QCADesigner.
• In some circuits, the input distribution wires get wrong clock zones near the splitting points. (Corrected in the present version.)
• Significant area is wasted, specially for large circuits. The action of gate placement has to be improved. This kind of waste can be observed in example.qca above.
• When a primary input is needed only in one place, some wire length can be saved. This kind of waste can be seen in simple2.qca above.

• More results and test netlists can be found within the source code package, in the subdirectory "CodigoC/testes/".

• A 1 bit full-adder: adder5.lsi, adder5.qca.

  

• A 1 bit 2 to 1 multiplexer: mux.lsi, mux.qca.

  

  And it's simulation wave forms, obtained with QCADesigner:

  

Last updated in 2007-09-16 at 20:20.