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"""
# TOP2049 Open Source programming suite
#
# 74HC4094 unit-tester
#
# Copyright (c) 2011 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 .unitest import *
class Chip_74hc4094(Chip_Unitest):
def __init__(self):
Chip_Unitest.__init__(self, chipPackage="DIP16",
chipPinVCC=16,
chipPinGND=8,
VCCVoltage=5)
def __initChip(self):
self.zifPin_STR = self.generator.getZifPinForPackagePin(1)
self.zifPin_D = self.generator.getZifPinForPackagePin(2)
self.zifPin_CP = self.generator.getZifPinForPackagePin(3)
self.zifPin_OE = self.generator.getZifPinForPackagePin(15)
self.zifPin_QS1 = self.generator.getZifPinForPackagePin(9)
self.zifPin_QS2 = self.generator.getZifPinForPackagePin(10)
self.zifPins_QP = []
for packagePin in (4, 5, 6, 7, 14, 13, 12, 11):
self.zifPins_QP.append(
self.generator.getZifPinForPackagePin(packagePin))
self.reset()
outen = 0
for zifPin in (self.zifPin_STR, self.zifPin_D,
self.zifPin_CP, self.zifPin_OE):
outen |= (1 << (zifPin - 1))
self.setOutputEnableMask(outen)
self.applyGND(True)
self.applyVCC(True)
def test(self):
testPatterns = (0xFF, 0x00, 0xAA, 0x55, 0xF0, 0x0F,
0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, 0x00)
self.progressMeterInit("Logic test", len(testPatterns))
self.__initChip()
# Initialize the register to all-zero
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=0))
for i in range(0, 9):
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=1, OE=0))
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=0))
self.setOutputs(self.__makeOutMask(STR=1, D=0, CP=0, OE=0))
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=1))
QP = self.__readQP()
if QP != 0x00:
self.throwError("Failed to clear the shiftregister. Got 0x%02X" % QP)
prevContents = 0x00
prev_QS1 = False
count = 0
for testPattern in testPatterns:
self.progressMeter(count)
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=0))
for bitNr in range(7, -1, -1): # MSB first
self.setOutputs(self.__makeOutMask(STR=0,
D=(testPattern & (1 << bitNr)),
CP=0, OE=0))
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=1, OE=0))
(QS1, QS2) = self.__readQS()
word = (prevContents << 8) | testPattern
expect_QS1 = bool(word & (1 << (bitNr + 7)))
expect_QS2 = prev_QS1
prev_QS1 = expect_QS1
if QS1 != expect_QS1 or QS2 != expect_QS2:
self.throwError("Got invalid QS serial output for "
"test pattern 0x%02X bit %d. Got %d/%d, but "
"expected %d/%d" %\
(testPattern, bitNr, QS1, QS2,
expect_QS1, expect_QS2))
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=0))
self.setOutputs(self.__makeOutMask(STR=1, D=0, CP=0, OE=0))
self.setOutputs(self.__makeOutMask(STR=0, D=0, CP=0, OE=1))
QP = self.__readQP()
if QP != testPattern:
self.throwError("Failed on test pattern 0x%02X. Got 0x%02X" %\
(testPattern, QP))
prevContents = testPattern
count += 1
self.progressMeterFinish()
def __makeOutMask(self, STR, D, CP, OE):
mask = 0
if STR:
mask |= (1 << (self.zifPin_STR - 1))
if D:
mask |= (1 << (self.zifPin_D - 1))
if CP:
mask |= (1 << (self.zifPin_CP - 1))
if OE:
mask |= (1 << (self.zifPin_OE - 1))
return mask
def __readQP(self):
QPValue = 0
count = 0
inputs = self.getInputs()
for zifPin in self.zifPins_QP:
if inputs & (1 << (zifPin - 1)):
QPValue |= (1 << count)
count += 1
return QPValue
def __readQS(self):
QS1 = False
QS2 = False
inputs = self.getInputs()
if inputs & (1 << (self.zifPin_QS1 - 1)):
QS1 = True
if inputs & (1 << (self.zifPin_QS2 - 1)):
QS2 = True
return (QS1, QS2)
ChipDescription(
Chip_74hc4094,
chipID = "74hc4094dip16",
bitfile = "unitest",
runtimeID = (0x0008, 0x01),
chipType = ChipDescription.TYPE_LOGIC,
description = "74HC(T)4094 shift-register",
chipVendors = ("Philips", "Other"),
)
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