hex文件格式说明.pdf

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1、WhatistheIntelHEXfileformat?TheIntelHEXfileisanASCIItextfilewithlinesoftextthatfollowtheIntelHEXfileformat.EachlineinanIntelHEXfilecontainsoneHEXrecord.Theserecordsaremadeupofhexadecimalnumbersthatrepresentmachinelanguagecodeand/orconstantdata.IntelHEXfilesareoftenusedtotransfertheprogramanddatathat

2、wouldbestoredinaROMorEPROM.MostEPROMprogrammersoremulatorscanuseIntelHEXfiles.RecordFormatAnIntelHEXfileiscomposedofanynumberofHEXrecords.Eachrecordismadeupoffivefieldsthatarearrangedinthefollowingformat::llaaaatt[dd...]ccEachgroupofletterscorrespondstoadifferentfield,andeachletterrepresentsasingleh

3、exadecimaldigit.Eachfieldiscomposedofatleasttwohexadecimaldigits-whichmakeupabyte-asdescribedbelow::isthecolonthatstartseveryIntelHEXrecord.llistherecord-lengthfieldthatrepresentsthenumberofdatabytes(dd)intherecord.aaaaistheaddressfieldthatrepresentsthestartingaddressforsubsequentdataintherecord.tti

4、sthefieldthatrepresentstheHEXrecordtype,whichmaybeoneofthefollowing:00-datarecord01-end-of-filerecord02-extendedsegmentaddressrecord04-extendedlinearaddressrecordddisadatafieldthatrepresentsonebyteofdata.Arecordmayhavemultipledatabytes.Thenumberofdatabytesintherecordmustmatchthenumberspecifiedbythel

5、lfield.ccisthechecksumfieldthatrepresentsthechecksumoftherecord.Thechecksumiscalculatedbysummingthevaluesofallhexadecimaldigitpairsintherecordmodulo256andtakingthetwo'scomplement.DataRecordsTheIntelHEXfileismadeupofanynumberofdatarecordsthatareterminatedwithacarriagereturnandalinefeed.Datarecordsapp

6、earasfollows::10246200464C5549442050524F46494C4500464C33where:10isthenumberofdatabytesintherecord.2462istheaddresswherethedataaretobelocatedinmemory.00istherecordtype00(adatarecord).464C...464Cisthedata.33isthechecksumoftherecord.ExtendedLinearAddressRecords(HEX386)Extendedlinearaddressrecordsareals

7、oknownas32-bitaddressrecordsandHEX386records.Theserecordscontaintheupper16bits(bits16-31)ofthedataaddress.Theextendedlinearaddressrecordalwayshastwodatabytesandappearsasfollows::02000004FFFFFCwhere:02