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#!/usr/bin/python
from itertools import groupby
# should be parametrized
FLASH_SIZE = 32768
VECTOR_SIZE = 16 # in entries
FILL_BYTE = 0xFF
MAP_SIZE = 65536
def load_titxt(fin):
bytes = [None] * MAP_SIZE
ptr = None
for line in fin:
line = line.strip()
if line.startswith("@"):
ptr = int(line[1:], 16)
elif line.startswith("q"):
break
else:
for sb in line.split():
b = int(sb, 16)
bytes[ptr] = b
ptr += 1
return bytes
def two_used(ar):
two = [None] * ((len(ar) + 1) // 2)
for i, el in enumerate(ar):
if el is not None:
two[i // 2] = True
return two
def fill_if_none(fw, i, fill_value):
if fw[i] is None:
fw[i] = fill_value
def fill_word(fw, i, word):
fw[i] = int((word >> 8) & 0xff)
fw[i + 1] = int(word & 0xff)
def fill_dword(fw, i, dword):
fw[i] = int((dword >> 24) & 0xff)
fw[i + 1] = int((dword >> 16) & 0xff)
fw[i + 2] = int((dword >> 8) & 0xff)
fw[i + 3] = int((dword >> 0) & 0xff)
def vector_begin(vector_size):
return MAP_SIZE - (vector_size * 2)
def flash_begin(flash_size):
return MAP_SIZE - flash_size
def fill_fw(fw, flash_size, options):
w = options.fill_single
dw = options.fill_double
invalid_vector = options.invalid_vector
rb = options.repeat_bslskey
if not (0 <= w < 65536):
raise ValueError("invalid w %r" % w)
if (dw is not None) and not (0 <= dw < 2**32):
raise ValueError("invalid dw %r" % dw)
if not (0 <= invalid_vector < 65536):
raise ValueError("invalid invalid_vector %r" % invalid_vector)
# special case for BSLSKEY
vector_base = vector_begin(VECTOR_SIZE)
if (rb > 0):
if not (0 <= options.bslskey < 65536):
raise ValueError("invalid bslskey %r" % options.bslskey)
for i in xrange(vector_base - 2 * rb, vector_base, 2):
fill_word(fw, i, options.bslskey)
# special case for interrupt vectors
for i in xrange(vector_base, MAP_SIZE, 2):
if fw[i] is None:
fill_word(fw, i, invalid_vector)
# common cases
flash_base = flash_begin(flash_size)
if dw is not None:
du = two_used(two_used(fw))
for i in xrange(flash_base, len(fw), 4):
if not du[i // 4]:
fill_dword(fw, i, dw)
wu = two_used(fw)
for i in xrange(flash_base, len(fw), 2):
if not wu[i // 2]:
fill_word(fw, i, w)
for i in xrange(flash_base, len(fw)):
fill_if_none(fw, i, FILL_BYTE)
def chunkify(lst, n):
gp = []
for el in lst:
gp.append(el)
if len(gp) >= n:
yield gp
gp = []
if gp:
yield gp
def save_titxt(fout, fw):
for k, g in groupby(enumerate(fw), lambda (i, x): x is None):
if k is False:
chunk = list(g)
start = chunk[0][0]
data = [x for (i, x) in chunk]
fout.write("@%04X\r\n" % start)
for g in chunkify(data, 16):
line_str = " ".join(["%02X" % e for e in g])
fout.write(line_str + "\r\n")
fout.write("q\r\n")
fout.close()
def fill_titxt(fin, fout, options):
fw = load_titxt(fin)
fill_fw(fw, FLASH_SIZE, options)
save_titxt(fout, fw)
def main():
from optparse import OptionParser
import sys
parser = OptionParser(usage="fill_titxt <options> -o output.txt input.txt")
parser.add_option("-d", "--fill-double-word", dest="fill_double",
type="long", help="fill aligned double words with")
parser.add_option("-w", "--fill-single-word", dest="fill_single",
type="int", help="fill single words with")
parser.add_option("-x", "--bslskey", dest="bslskey", default=0,
type="int", action="store", help="fill skey with")
parser.add_option("-n", "--repeat-bslskey", dest="repeat_bslskey",
default=0, type="int", action="store",
help="use n words ending at bslskey")
parser.add_option("-i", "--invalid-vector", dest="invalid_vector",
type="int", default=0, help="address of invalid " \
"interrupt handler")
parser.add_option("-o", "--output", dest="output", help="output file")
(options, args) = parser.parse_args()
if (len(args) != 1) \
or (not options.output) \
or (options.fill_single is None):
parser.print_help()
sys.exit(1)
if (options.fill_single is None) or not (0 <= options.fill_single < 65536):
print >> sys.stderr, "-w <n> should verify 0 <= n < 65536"
if (options.fill_double is not None) \
and not (0 <= options.fill_double < 2**32):
print >> sys.stderr, "-d <n> should verify 0 <= n < 2**32"
if not (0 <= options.invalid_vector < 65536):
print >> sys.stderr, "-i <n> should verify 0 <= n < 65536"
if not (0 <= options.bslskey < 65536):
print >> sys.stderr, "-x <n> should verify 0 <= n < 65536"
if not (0 <= options.repeat_bslskey <= 16):
print >> sys.stderr, "-n <n> should verify 0 <= n <= 16"
fin = open(args[0], "rU")
fout = open(options.output, "wb")
fill_titxt(fin, fout, options)
if __name__ == '__main__':
main()
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