From ad0dc1f8d28bbb4625dc9316932651a44f1a0a37 Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Fri, 26 Feb 2010 18:56:13 +0100 Subject: Add generic layout baseclass Signed-off-by: Michael Buesch --- libtoprammer/shiftreg_layout.py | 60 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 libtoprammer/shiftreg_layout.py (limited to 'libtoprammer/shiftreg_layout.py') diff --git a/libtoprammer/shiftreg_layout.py b/libtoprammer/shiftreg_layout.py new file mode 100644 index 0000000..04d3300 --- /dev/null +++ b/libtoprammer/shiftreg_layout.py @@ -0,0 +1,60 @@ +""" +# 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) + assert(nrShiftRegs <= 4) + 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): + if bitNr >= 24: + register = 3 + pin = bitNr - 24 + elif bitNr >= 16: + register = 2 + pin = bitNr - 16 + elif bitNr >= 8: + register = 1 + pin = bitNr - 8 + else: + register = 0 + pin = bitNr + return "%d.%d" % (register, pin) + + def supportedLayouts(self): + return self.layouts -- cgit v1.2.3