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authorMichael Buesch <mb@bu3sch.de>2010-02-26 18:56:13 +0100
committerMichael Buesch <mb@bu3sch.de>2010-02-26 18:56:13 +0100
commitad0dc1f8d28bbb4625dc9316932651a44f1a0a37 (patch)
tree8f2bf53ff59a30f77e8308a8da3a4f932c45b881 /libtoprammer/shiftreg_layout.py
parent82e2de5fe9d4822a456ab78257f65526b1485799 (diff)
downloadtoprammer-ad0dc1f8d28bbb4625dc9316932651a44f1a0a37.tar.xz
toprammer-ad0dc1f8d28bbb4625dc9316932651a44f1a0a37.zip
Add generic layout baseclass
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Diffstat (limited to 'libtoprammer/shiftreg_layout.py')
-rw-r--r--libtoprammer/shiftreg_layout.py60
1 files changed, 60 insertions, 0 deletions
diff --git a/libtoprammer/shiftreg_layout.py b/libtoprammer/shiftreg_layout.py
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+++ b/libtoprammer/shiftreg_layout.py
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+"""
+# TOP2049 Open Source programming suite
+#
+# TOP2049 Shiftregister based layout definitions
+#
+# Copyright (c) 2010 Michael Buesch <mb@bu3sch.de>
+#
+# 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
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