pub const MACRO_KEEPOUT_UM: f64 = 50.0;Expand description
Micrometres of keep-out around every macro.
Macros need room for their power hookup and for signal routing to escape; abutting them makes
the wrapper unroutable no matter how much total area is free. 50 um is the spacing the single
-macro wrapper already uses successfully (macro.cfg places mprj at 60,880 inside a
2920x3520 area) and is kept here rather than tightened, because a packing failure costs a
multi-hour route to discover.