157 lines
4.7 KiB
Python
157 lines
4.7 KiB
Python
"""
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*******************************************************************************
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* Ledger Blue
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* (c) 2016 Ledger
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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********************************************************************************
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"""
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class IntelHexArea:
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def __init__(self, start, data):
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self.start = start
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self.data = data
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self.bootAddr = 0
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def getStart(self):
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return self.start
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def getData(self):
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return self.data
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class IntelHexParser:
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def __init__(self, fileName):
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self.areas = []
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lineNumber = 0
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startZone = None
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startFirst = None
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current = None
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zoneData = b''
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file = open(fileName, "r")
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for data in file:
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lineNumber += 1
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data = data.rstrip('\r\n')
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if len(data) == 0:
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continue
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if data[0] != ':':
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raise Exception("Invalid data at line %d" % lineNumber)
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data = bytearray.fromhex(data[1:]) #binascii.unhexlify(data[1:])
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count = data[0]
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address = (data[1] << 8) + data[2]
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recordType = data[3]
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if recordType == 0x00:
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if startZone == None:
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raise Exception("Data record but no zone defined at line " + lineNumber)
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if startFirst == None:
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startFirst = address
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current = startFirst
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if address != current:
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self.areas.append(IntelHexArea((startZone << 16) + startFirst, zoneData))
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zoneData = ""
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startFirst = address
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current = address
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zoneData += data[4:4 + count]
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current += count
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if recordType == 0x01:
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if len(zoneData) != 0:
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self.areas.append(IntelHexArea((startZone << 16) + startFirst, zoneData))
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zoneData = ""
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startZone = None
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startFirst = None
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current = None
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if recordType == 0x02:
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raise Exception("Unsupported record 02")
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if recordType == 0x03:
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raise Exception("Unsupported record 03")
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if recordType == 0x04:
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if len(zoneData) != 0:
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self.areas.append(IntelHexArea((startZone << 16) + startFirst, zoneData))
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zoneData = ""
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startZone = None
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startFirst = None
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current = None
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startZone = (data[4] << 8) + data[5]
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if recordType == 0x05:
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self.bootAddr = ((data[4]&0xFF) << 24) + ((data[5]&0xFF) << 16) + ((data[6]&0xFF) << 8) + (data[7]&0xFF)
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file.close()
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def getAreas(self):
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return self.areas
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def getBootAddr(self):
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return self.bootAddr
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def maxAddr(self):
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addr = 0
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for a in self.areas:
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if (a.start+len(a.data) > addr):
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addr = a.start+len(a.data)
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return addr
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import binascii
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class IntelHexPrinter:
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def __init__(self, parser=None, eol="\r\n"):
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self.areas = []
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self.eol = eol
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self.bootAddr = 0
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# build bound to the parser
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if (parser):
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self.areas = parser.areas
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self.bootAddr = parser.bootAddr
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def addArea(self, startaddress, data):
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self.areas.append(IntelHexArea(startaddress, data))
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def setBootAddr(self, bootAddr):
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self.bootAddr = int(bootAddr)
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def checksum(self, bin):
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cks = 0
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for b in bin:
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cks += b
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cks = (-cks) & 0x0FF
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return cks
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def _emit_binary(self, file, bin):
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cks = self.checksum(bin)
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file.write((":" + binascii.hexlify(bin) + hex(0x100+cks)[3:] + self.eol).upper())
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def writeTo(self, fileName, blocksize=32):
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file = open(fileName, "w")
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for area in self.areas:
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off = 0
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# force the emission of selection record at start
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oldoff = area.start + 0x10000
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while off < len(area.data):
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# emit a offset selection record
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if ((off & 0xFFFF0000) != (oldoff & 0xFFFF0000) ):
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self._emit_binary(file, bytearray(("02000004" + hex(0x10000+(area.start>>16))[3:7]).decode('hex')))
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# emit data record
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if (off+blocksize > len(area.data)):
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self._emit_binary(file, bytearray((hex(0x100+(len(area.data)-off))[3:] + hex(0x10000+off+(area.start&0xFFFF))[3:] + "00").decode('hex')) + area.data[off:len(area.data)])
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else:
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self._emit_binary(file, bytearray((hex(0x100+blocksize)[3:] + hex(0x10000+off+(area.start&0xFFFF))[3:] + "00").decode('hex')) + area.data[off:off+blocksize])
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oldoff = off;
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off += blocksize
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bootAddrHex = hex(0x100000000+self.bootAddr)[3:]
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file.write(":04000005"+bootAddrHex+hex(0x100+self.checksum( bytearray(("04000005"+bootAddrHex).decode('hex'))))[3:]+self.eol)
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file.write(":00000001FF"+self.eol)
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file.close()
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