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Manage a minimum spacing between I/O pads at chip level. 

* Change: In Cumulus/plupins.chip.pads.Side, in some case (LibreSOCIOPads),
    when not put side by side, the I/O pads must be separated by a
    minimal distance.
      Introduce the new configuration parameter:
        cfg.chip.minPadSpacing
      Disabled if zero or non-defined.
      Fix NWELL DRC errors for TSMC.
This commit is contained in:
Jean-Paul Chaput 2021-04-07 14:51:16 +02:00
parent a2525f2260
commit df4201e1fe
1 changed files with 18 additions and 4 deletions
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22
cumulus/src/plugins/alpha/chip/pads.py
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@ -362,9 +362,17 @@ class Side ( object ):
pad[0] = self.toGrid( pad[0] )
position = pad[0] + pad[1].getMasterCell().getAbutmentBox().getWidth()
else:
position = self.u
print( 'padSpacing:{}'.format(DbU.getValueString(padSpacing) ))
spacing = 0
minSpacing = self.corona.minPadSpacing
position = self.u
for i in range(len(self.pads)):
position += padSpacing
spacing += padSpacing
nextPosition = self.toGrid( position + spacing )
if nextPosition - position >= minSpacing:
print( 'add spacing @{}:{}'.format(i,DbU.getValueString(spacing) ))
position += spacing
spacing = 0
self.pads[i][0] = self.toGrid( position )
position += self.pads[i][1].getMasterCell().getAbutmentBox().getWidth()
for pad in self.pads:
@ -817,8 +825,9 @@ class Corona ( object ):
self.padOrient = Transformation.Orientation.MY
trace( 550, '\tchip.padCoreSide: {}\n'.format(self.conf.cfg.chip.padCoreSide) )
self._allPadsAnalysis()
self.conf.cfg.chip.padSpacers = None
self.conf.cfg.chip.padCorner = None
self.conf.cfg.chip.minPadSpacing = None
self.conf.cfg.chip.padSpacers = None
self.conf.cfg.chip.padCorner = None
if self.conf.cfg.chip.padSpacers is not None:
for spacerName in self.conf.cfg.chip.padSpacers.split(','):
spacerCell = self.padLib.getCell( spacerName )
@ -828,12 +837,17 @@ class Corona ( object ):
self.padSpacers.sort( _cmpPad )
if self.conf.cfg.chip.padCorner is not None:
self.padCorner = self.padLib.getCell( self.conf.cfg.chip.padCorner )
if self.conf.cfg.chip.minPadSpacing is None:
self.conf.cfg.chip.minPadSpacing = 0
@property
def supplyRailWidth ( self ): return self.conf.cfg.chip.supplyRailWidth
@property
def supplyRailPitch ( self ): return self.conf.cfg.chip.supplyRailPitch
@property
def minPadSpacing ( self ): return self.conf.cfg.chip.minPadSpacing
def toGrid ( self, u ): return u - (u % self.conf.ioPadPitch)