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"""
# TOP2049 Open Source programming suite
#
# TOP2049 Lowlevel hardware access
#
# 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 libtoprammer.util import *
from libtoprammer.hardware_access_usb import *
class HardwareAccess(HardwareAccessUSB):
"TOP2049 hardware access"
ADDR_OK_BIT = 4
def __init__(self, foundUSBDev,
noQueue=False, doRawDump=False):
HardwareAccessUSB.__init__(self,
usbdev = foundUSBDev.usbdev,
maxPacketBytes = 64,
noQueue = noQueue,
doRawDump = doRawDump)
def getOscillatorHz(self):
"Get the 'OSC' frequency."
return 24000000
def getBufferRegSize(self):
"Get the buffer register size, in bytes."
return 64
def readBufferReg(self, nrBytes):
"Reads and returns the buffer register from hardware."
self.queueCommand(int2byte(0x07))
return self.receive(self.getBufferRegSize())[:nrBytes]
def hardwareInit(self):
"Initialize the hardware."
self.queueCommand(b"\x0D")
if self.readBufferReg(4) != b"\x69\x0C\x02\x00":
print("Init: Unexpected status (a)")
self.setVPPVoltage(0)
self.setVPPVoltage(0)
self.queueCommand(b"\x0E\x20\x00\x00")
self.delay(0.01)
self.setVCCVoltage(0)
self.loadGNDLayout(0)
self.loadVPPLayout(0)
self.loadVCCLayout(0)
self.queueCommand(b"\x0E\x20\x00\x00")
self.delay(0.01)
self.queueCommand(b"\x0E\x25\x00\x00")
if self.readBufferReg(4) != b"\x6C\x68\x00\x00":
print("Init: Unexpected status (b)")
self.enableZifPullups(False)
self.flushCommands()
def readVersionString(self):
"Returns the device ID and versioning string."
self.queueCommand(b"\x0E\x11\x00\x00")
data = self.readBufferReg(16)
return data.decode("ASCII", "ignore").strip()
def getFPGAType(self):
"Get the FPGA architecture."
return "xc2s15"
def getFPGAMaxConfigChunkSize(self):
"Maximum config chunk size."
return 60
def FPGAInitiateConfig(self):
"Initiate a configuration sequence on the FPGA."
self.queueCommand(b"\x0E\x21\x00\x00")
stat = byte2int(self.readBufferReg(1))
expected = 0x01
if stat != expected:
raise TOPException("bit-upload: Failed to initiate " +\
"config sequence (got 0x%02X, expected 0x%02X)" %\
(stat, expected))
def FPGAUploadConfig(self, offset, data):
"Upload configuration data into the FPGA."
assert(len(data) <= self.getFPGAMaxConfigChunkSize())
cmd = b"\x0E\x22\x00\x00" + data
cmd += b"\x00" * (64 - len(cmd)) # padding
self.queueCommand(cmd)
def makeFPGAAddr(self, address):
# Set the "address OK" bit
return address | (1 << self.ADDR_OK_BIT)
def FPGARead(self, address):
"Do an FPGA read at 'address'. Data is put into buffer reg."
address = self.makeFPGAAddr(address)
if address == self.makeFPGAAddr(0): # Fast tracked
self.queueCommand(int2byte(0x01))
return
self.queueCommand(int2byte(0x0B) + int2byte(address))
def FPGAWrite(self, address, byte):
"Write 'byte' to FPGA at 'address'."
address = self.makeFPGAAddr(address)
if address == self.makeFPGAAddr(0): # Fast tracked
self.queueCommand(int2byte(0x10) + int2byte(byte))
return
self.queueCommand(int2byte(0x0A) + int2byte(address) +\
int2byte(byte))
def loadGNDLayout(self, layout):
"Load the GND configuration into the H/L shiftregisters."
cmd = int2byte(0x0E) + int2byte(0x16) +\
int2byte(layout) + int2byte(0)
self.queueCommand(cmd)
self.delay(0.01)
self.flushCommands(0.15)
def setVPPVoltage(self, voltage):
"Set the VPP voltage. voltage is a floating point voltage number."
centivolt = int(voltage * 10)
cmd = int2byte(0x0E) + int2byte(0x12) +\
int2byte(centivolt) + int2byte(0)
self.queueCommand(cmd)
self.delay(0.01)
def loadVPPLayout(self, layout):
"Load the VPP configuration into the shift registers."
cmd = int2byte(0x0E) + int2byte(0x14) +\
int2byte(layout) + int2byte(0)
self.queueCommand(cmd)
self.delay(0.01)
self.flushCommands(0.15)
def setVCCVoltage(self, voltage):
"Set the VCC voltage."
centivolt = int(voltage * 10)
cmd = int2byte(0x0E) + int2byte(0x13) +\
int2byte(centivolt) + int2byte(0)
self.queueCommand(cmd)
self.delay(0.01)
def loadVCCLayout(self, layout):
"Load the VCC configuration into the shift registers."
cmd = int2byte(0x0E) + int2byte(0x15) +\
int2byte(layout) + int2byte(0)
self.queueCommand(cmd)
self.delay(0.01)
self.flushCommands(0.15)
def enableZifPullups(self, enable):
"Enable the ZIF socket signal pullups."
param = 1 if enable else 0
cmd = int2byte(0x0E) + int2byte(0x28) +\
int2byte(param) + int2byte(0)
self.queueCommand(cmd)
def __delay_4usec(self):
self.queueCommand(int2byte(0x00))
def __delay_10msec(self):
self.queueCommand(int2byte(0x1B))
def delay(self, seconds):
"Perform an on-device or host delay."
if seconds >= 0.5:
# Perform long delays on the host
self.flushCommands(seconds)
return
if seconds > 0.000255:
# Need to round up to ten milliseconds
millisecs = int(math.ceil(seconds * 1000))
millisecs = roundup(millisecs, 10)
for i in range(0, millisecs // 10):
self.__delay_10msec()
else:
# Round up to 4 usec boundary
microsecs = int(math.ceil(seconds * 1000000))
microsecs = roundup(microsecs, 4)
for i in range(0, microsecs // 4):
self.__delay_4usec()
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