[libre-riscv-dev] [Bug 217] create a "ring" system which allows pad locations to be specified conveniently

[bugzilla-daemon@libre-riscv.org]

http://bugs.libre-riscv.org/show_bug.cgi?id=217

--- Comment #6 from Luke Kenneth Casson Leighton <lkcl@lkcl.net> ---
ok, jock, i thought about it: i have a specific task for you :)

* take benchs/nmigen/ALU16 and create (cut/paste) experiments7
  in soclayout
* in doAlu16.py, in each of add(), sub() and alu16(), *replace*
  the hand-coded addition of Pins (Pin.create) with explicit
  use of ChipConf from cumulus/src/plugins/chip/Configuration.py

the only thing to watch out for is that BLOCKAGE2 through BLOCKAGE5
are added in add() and sub().  it *may* be necessary to create a
separate function for that, we just have to see.

if necessary, for now, take a copy of Configuration.py and add it
to experiments7 in the soclayout repo, so that you can edit it.
or, better (preferred), subclass it.

just get stuck in, and see how that goes?

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