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"""
# TOP2049 Open Source programming suite
#
# Generic ZIF socket voltage layout
#
# 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.util import *
class GenericLayout:
def __init__(self, nrZifPins):
self.nrZifPins = nrZifPins
def getNrOfPins(self):
"Returns the number of pins on the layout"
return self.nrZifPins
def __repr__(self):
res = ""
for (id, zif_mask) in self.supportedLayouts():
res += "Layout %d:\n" % id
res += " o---------o\n"
for pin in range(1, self.nrZifPins // 2 + 1):
left = " "
right = ""
if (1 << (pin - 1)) & zif_mask:
left = "HOT >"
if (1 << (self.nrZifPins - pin)) & zif_mask:
right = "< HOT"
res += "%s | %2d | %2d | %s\n" % \
(left, pin, self.nrZifPins + 1 - pin, right)
res += " o---------o\n\n"
return res
def supportedLayouts(self):
"""Returns a list of supported layouts.
Each entry is a tuple of (id, bitmask), where bitmask is
the ZIF layout. bit0 is ZIF-pin-1. A bit set means a hot pin."""
# Reimplement me in the subclass
raise Exception()
def ID2mask(self, id):
"Convert a layout ID to a layout mask"
for (layoutId, layoutMask) in self.supportedLayouts():
if id == layoutId:
return layoutMask
return None
def ID2pinlist(self, id):
"Convert a layout ID to a list of pins"
pinlist = []
mask = self.ID2mask(id)
for i in range(0, self.nrZifPins):
if mask & (1 << i):
pinlist.append(i + 1)
return pinlist
def setLayoutPins(self, zifPinsList):
"""Load a layout. zifPinsList is a list of hot ZIF pins.
The first ZIF pin is 1."""
zifMask = 0
for zifPin in zifPinsList:
assert(zifPin >= 1)
zifMask |= (1 << (zifPin - 1))
self.setLayoutMask(zifMask)
def setLayoutMask(self, zifMask):
"Load a ZIF mask."
for (layoutId, layoutMask) in self.supportedLayouts():
if layoutMask == zifMask:
self.setLayoutID(layoutId)
return
raise TOPException("Layout mask impossible due to hardware constraints")
def setLayoutID(self, id):
"Load a specific layout ID."
# Reimplement me in the subclass
raise Exception()
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