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- """
- # TOP2049 Open Source programming suite
- #
- # TOP2049 Shiftregister based layout definitions
- #
- # Copyright (c) 2010 Michael Buesch <m@bues.ch>
- #
- # This program is free software; you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation; either version 2 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program; if not, write to the Free Software Foundation, Inc.,
- # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- """
- from libtoprammer.generic_layout import *
- class ShiftregLayout(GenericLayout):
- def __init__(self, nrZifPins, nrShiftRegs):
- GenericLayout.__init__(self, nrZifPins)
- self.nrShiftRegs = nrShiftRegs
- self.layouts = []
- for id in range(0, len(self.shiftreg_masks)):
- shreg_mask = self.shiftreg_masks[id]
- zif_mask = 0
- for bit in range(0, self.nrShiftRegs * 8):
- if (shreg_mask & (1 << bit)) == 0:
- continue
- regId = self.__bitnr2shregId(bit)
- zifPin = self.shreg2zif_map[regId]
- zif_mask |= (1 << (zifPin - 1))
- if id == 0 or zif_mask != 0:
- self.layouts.append( (id, zif_mask) )
- def __bitnr2shregId(self, bitNr):
- register = bitNr // 8
- pin = bitNr % 8
- return "%d.%d" % (register, pin)
- def supportedLayouts(self):
- return self.layouts
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