def main():
# First of all parse the command line
parser = OptionParser()
parser.add_option("-c",
"--capacity",
dest="capacity",
help="size of the memory chip.",
type="int")
parser.add_option("-o",
"--org",
dest="org",
help="specify the memory organization mode (8 or 16).",
type="int")
parser.add_option(
"-a",
"--addr",
dest="addr",
help="set the starting offset of the read or write procedure.",
type="int",
default=0)
parser.add_option("-n",
"--number",
dest="n",
help="the number of data elements to read or write.",
type="int",
default=0)
parser.add_option("-f",
"--file",
dest="file",
help="the input or output file.",
metavar="FILE")
parser.add_option("-r",
"--read",
dest="action",
help="read the memory chip.",
default="read")
parser.add_option("-w",
"--write",
dest="action",
help="write to the memory chip.")
parser.add_option(
"-d",
"--device",
dest="device",
help="serial interface where bus pirate is in.[/dev/bus_pirate]",
default="/dev/bus_pirate")
parser.add_option("-v",
"--verbose",
dest="verbose",
help="don't be quiet.",
action="store_true")
parser.add_option("-m",
"--more",
dest="more",
help="only for testing: read more data elements",
type="int",
default=0)
(options, args) = parser.parse_args()
if (not options.capacity) or (not options.org) or (not options.file):
parser.print_help()
exit()
# Create an instance of the RAW_WIRE class as we are using the BitBang/RAW_WIRE mode
#rw = RAW_WIRE( '/dev/bus_pirate', 115200 )
rw = RAW_WIRE(options.device, 115200)
if not rw.BBmode():
print "Can't enter into BitBang mode."
exit()
# We have succesfully activated the BitBang Mode, so we continue with
# the raw-wire mode.
if not rw.enter_rawwire():
print "Can't enable the raw-wire mode."
exit()
# Now we have raw-wire mode enabled, so first configure peripherals
# (Power, PullUps, AUX, CS)
if not rw.raw_cfg_pins(PinCfg.POWER | PinCfg.CS):
print "Error enabling the internal voltage regulators."
# Configure the raw-wire mode
if not rw.cfg_raw_wire((RAW_WIRECfg.BIT_ORDER
& RAW_WIRE_BIT_ORDER_TYPE.MSB)
| (RAW_WIRECfg.WIRES & RAW_WIRE_WIRES_TYPE.THREE)
| (RAW_WIRECfg.OUT_TYPE & RAW_WIRE_OUT_TYPE._3V3)):
print "Error configuring the raw-wire mode."
# Set raw-wire speed
if not rw.set_speed(RAW_WIRESpeed._5KHZ):
print "Error setting raw-wire speed."
# Open the file for reading or writting
if options.action == "read":
f = file(options.file, "wb")
else:
f = file(options.file, "rb")
# How many elements to read or write?
if options.n != 0:
N = options.n + options.more
else:
N = options.capacity / options.org + options.more
# Opcodes for microwire memory devices
#
# Op Address Data
#Instruction SB Code x8 x16 x8 x16 Comments
# READ 1 10 A8 – A0 A7 – A0 Reads data stored in memory, at specified address
# EWEN 1 00 11XXXXXXX 11XXXXXX Write enable must precede all programming modes
#
# ....
#
if options.action == "read":
# Enable the Chip select signal
rw.CS_High()
rw.bulk_trans(1, [0x6])
rw.bulk_trans(1, [0x0])
# and read the items
if options.verbose:
print "Reading %d elements of %d bits" % (N, options.org)
if options.org == 8:
for i in range(0, N):
byte = rw.read_byte()
f.write(byte)
if options.verbose:
print "%02X" % (ord(byte), ),
else:
for i in range(0, N):
byte = rw.read_byte()
f.write(byte)
if options.verbose:
print "%02X" % (ord(byte), ),
byte = rw.read_byte()
f.write(byte)
if options.verbose:
print "%02X" % (ord(byte), ),
f.close()
rw.CS_Low()
print "Done."
# Reset the bus pirate
rw.resetBP()
