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"""
# TOP2049 Open Source programming suite
#
# Generic programming algorithms
#
# Copyright (c) 2012 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 .util import *
class AddrSetter(object):
"""Generic address setter"""
def __init__(self, chip,
fpgaCmdByte0,
fpgaCmdByte1 = -1,
fpgaCmdByte2 = -1,
fpgaCmdByte3 = -1,
addrSetupFunc = lambda byteNr, data: None,
addrFinishFunc = lambda byteNr, data: None):
"""
chip => The Chip.
fpgaCmdByte0 => FPGA command number for setting addr byte 0.
fpgaCmdByte1 => FPGA command number for setting addr byte 1.
fpgaCmdByte2 => FPGA command number for setting addr byte 2.
fpgaCmdByte3 => FPGA command number for setting addr byte 3.
addrSetupFunc => Optional function called before addr write.
addrFinishFunc => Optional function called after addr write.
"""
self.chip = chip
self.fpgaCmds = [
fpgaCmdByte0,
fpgaCmdByte1,
fpgaCmdByte2,
fpgaCmdByte3,
]
self.addrSetupFunc = addrSetupFunc
self.addrFinishFunc = addrFinishFunc
self.reset()
def reset(self):
self.prevAddr = None
def load(self, addr):
"""Load an address into the FPGA.
This loads only the bytes that changed."""
shifts = (0, 8, 16, 24)
for byteNr, shift in enumerate(shifts):
fpgaCmd = self.fpgaCmds[byteNr]
if fpgaCmd < 0:
continue
addrByte = (addr >> shift) & 0xFF
if self.prevAddr is None or\
((self.prevAddr >> shift) & 0xFF) != addrByte:
self.addrSetupFunc(byteNr, addrByte)
self.chip.top.cmdFPGAWrite(fpgaCmd, addrByte)
self.addrFinishFunc(byteNr, addrByte)
self.prevAddr = addr
class GenericAlgorithms(object):
"""Generic programming algorithms."""
def __init__(self, chip):
self.chip = chip
def simpleVoltageSetup(self, vcc=5.0, vpp=5.0, vppEnable=False):
"""Simple voltage setup."""
self.chip.top.cmdSetVCCVoltage(vcc)
self.chip.top.cmdSetVPPVoltage(vpp)
self.chip.applyVCC(True)
self.chip.applyGND(True)
self.chip.applyVPP(vppEnable)
def simpleVoltageShutdown(self):
"""Turn off voltages."""
self.chip.applyVCC(False)
self.chip.applyVPP(False)
self.chip.applyGND(False)
self.chip.top.cmdSetVCCVoltage(self.chip.top.vcc.minVoltage())
self.chip.top.cmdSetVPPVoltage(self.chip.top.vpp.minVoltage())
def simpleRead(self, name, sizeBytes,
readData8Func,
addrSetter,
initFunc = lambda: None,
exitFunc = lambda: None):
"""Simple 8-bit data read algorithm."""
self.chip.progressMeterInit("Reading %s" % name, sizeBytes)
image, count = [], 0
initFunc()
addrSetter.reset()
for addr in range(0, sizeBytes):
self.chip.progressMeter(addr)
addrSetter.load(addr)
readData8Func()
count += 1
if count == self.chip.top.getBufferRegSize():
image.append(self.chip.top.cmdReadBufferReg())
count = 0
if count:
image.append(self.chip.top.cmdReadBufferReg()[:count])
exitFunc()
self.chip.progressMeterFinish()
return b"".join(image)
def simpleReadEPROM(self, sizeBytes,
readData8Func,
addrSetter,
initFunc = lambda: None,
exitFunc = lambda: None):
return self.simpleRead("EPROM", sizeBytes, readData8Func,
addrSetter, initFunc, exitFunc)
def simpleReadEEPROM(self, sizeBytes,
readData8Func,
addrSetter,
initFunc = lambda: None,
exitFunc = lambda: None):
return self.simpleRead("EEPROM", sizeBytes, readData8Func,
addrSetter, initFunc, exitFunc)
def simpleTest(self, readFunc, writeFunc, size):
"""Simple Unit-test."""
image = genRandomBlob(size)
writeFunc(image)
if readFunc() != image:
self.chip.throwError("Unit-test failed. "
"The chip may be physically broken.")
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