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Add support for user define start address when convert bin2hex output hexfile #69

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Add support for user define start address when convert bin2hex output hexfile #69

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16 changes: 9 additions & 7 deletions intelhex/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -547,7 +547,7 @@ def _get_eol_textfile(eolstyle, platform):
raise ValueError("wrong eolstyle %s" % repr(eolstyle))
_get_eol_textfile = staticmethod(_get_eol_textfile)

def write_hex_file(self, f, write_start_addr=True, eolstyle='native', byte_count=16):
def write_hex_file(self, f,start_address=None, write_start_addr=True, eolstyle='native', byte_count=16):
"""Write data to file f in HEX format.

@param f filename or file-like object for writing
Expand Down Expand Up @@ -650,7 +650,7 @@ def write_hex_file(self, f, write_start_addr=True, eolstyle='native', byte_count
bin[2] = 0 # offset lsb
bin[3] = 4 # rectyp
high_ofs = int(cur_addr>>16)
b = divmod(high_ofs, 256)
b = divmod(int((cur_addr + start_address)>>16), 256)
bin[4] = b[0] # msb of high_ofs
bin[5] = b[1] # lsb of high_ofs
bin[6] = (-sum(bin)) & 0x0FF # chksum
Expand Down Expand Up @@ -679,7 +679,7 @@ def write_hex_file(self, f, write_start_addr=True, eolstyle='native', byte_count
chain_len = 1 # real chain_len

bin = array('B', asbytes('\0'*(5+chain_len)))
b = divmod(low_addr, 256)
b = divmod(((low_addr+start_address) & 0x0FFFF), 256)
bin[1] = b[0] # msb of low_addr
bin[2] = b[1] # lsb of low_addr
bin[3] = 0 # rectype
Expand Down Expand Up @@ -712,15 +712,16 @@ def write_hex_file(self, f, write_start_addr=True, eolstyle='native', byte_count
if fclose:
fclose()

def tofile(self, fobj, format, byte_count=16):
def tofile(self, fobj, format,start_address=None, byte_count=16):
"""Write data to hex or bin file. Preferred method over tobin or tohex.

@param fobj file name or file-like object
@param format file format ("hex" or "bin")
@param start_address user define starting address for the output hex data
@param byte_count bytes per line
"""
if format == 'hex':
self.write_hex_file(fobj, byte_count=byte_count)
self.write_hex_file(fobj,start_address, byte_count=byte_count)
elif format == 'bin':
self.tobinfile(fobj)
else:
Expand Down Expand Up @@ -1081,13 +1082,14 @@ def hex2bin(fin, fout, start=None, end=None, size=None, pad=None):
#/def hex2bin


def bin2hex(fin, fout, offset=0):
def bin2hex(fin, fout, offset=0,start_address=None):
"""Simple bin-to-hex convertor.
@return 0 if all OK

@param fin input bin file (filename or file-like object)
@param fout output hex file (filename or file-like object)
@param offset starting address offset for loading bin
@param start_address output hex file with user define start address
"""
h = IntelHex()
try:
Expand All @@ -1099,7 +1101,7 @@ def bin2hex(fin, fout, offset=0):
return 1

try:
h.tofile(fout, format='hex')
h.tofile(fout, format='hex',start_address=start_address)
except IOError:
e = sys.exc_info()[1] # current exception
txt = "ERROR: Could not write to file: %s: %s" % (fout, str(e))
Expand Down