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#

# Intel Hex to Verilog Memory format converter

#

# Copyright (c) 2004 Guy Hutchison (ghutchis@opencores.org)

#

# Permission is hereby granted, free of charge, to any person obtaining a

# copy of this software and associated documentation files (the "Software"),

# to deal in the Software without restriction, including without limitation

# the rights to use, copy, modify, merge, publish, distribute, sublicense,

# and/or sell copies of the Software, and to permit persons to whom the

# Software is furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included

# in all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

class mem_image:

    def __init__ (self):

        self.min = 100000

        self.max = -1

        self.map = {}

        self.bcount = 0

    def load_ihex (self, infile):

        ifh = open (infile, 'r')

        line = ifh.readline()

        while (line != ''):

            if (line[0] == ':'):

                rlen = int(line[1:3], 16)

                addr = int(line[3:7], 16)

                rtyp = int(line[7:9], 16)

                ptr = 9

                for i in range (0, rlen):

                    laddr = addr + i

                    val = int(line[9+i*2:9+i*2+2], 16)

                    self.map[laddr] = val

                    self.bcount += 1

                    if (laddr > self.max): self.max = laddr

                    if (laddr < self.min): self.min = laddr

            line = ifh.readline()

        ifh.close()

    def save_vmem (self, outfile, start=-1, stop=-1):

        if (start == -1): start = self.min

        if (stop == -1): stop = self.max

        ofh = open (outfile, 'w')

        for addr in range(start, stop+1):

            if self.map.has_key (addr):

                ofh.write ("@%02x %02x\n" % (addr, self.map[addr]))

        ofh.close()

    conv.load_ihex(infile)

    conv.save_vmem(outfile)

    print "Converted %d bytes from %s to %s" % (conv.bcount, infile, outfile)