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"""
# TOP2049 Open Source programming suite
#
# TOP2049 GND 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.
"""
class GNDLayout:
# A list of valid ZIF GND pins (0=none)
validPins = (0, 5, 14, 15, 16, 17, 18, 19, 20, 24, 26, 27,
28, 29, 33, 34, 35)
def __init__(self, top=None):
self.top = top
self.layouts = []
for pin in self.validPins:
id = pin
if id != 0:
id -= 4
mask = 0
if pin != 0:
mask |= (1 << (pin - 1))
self.layouts.append( (id, mask) )
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."""
return self.layouts
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))
return self.setLayoutMask(zifMask)
def setLayoutMask(self, zifMask):
"Load a ZIF mask."
for (layoutId, layoutMask) in self.layouts:
if layoutMask == zifMask:
self.setLayoutID(layoutId)
return True
raise Exception()
#return False
def setLayoutID(self, id):
"Load a specific layout ID."
self.top.cmdLoadGNDLayout(id)
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