""" # TOP2049 Open Source programming suite # # TOP2049 Shiftregister based layout definitions # # Copyright (c) 2010 Michael Buesch # # 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