标签: ascii转换

Itisoftennecessarytooutputafloatingpointnumbertoadisplay.Forexample,tocheckcalculations,onemightwanttooutputfloatingpointnumbersusingthePICmicro®microcontrollersserialport,orusegeneralpurposeI/Otooutputtoaliquidcrystaldisplay(LCD).Eitherway,thefloatingpointnumbermustbecon-vertedtoitsASCIIequivalent.Thisdocumentshowsaspecificexampleofconvertinga32-bitfloatingpointnumbertoASCII.ApplicationnoteAN575contains24-bitand32-bitfloatingpointroutines.AsubroutineisprovidedherethatdoestheconversionandreturnstheASCIIequivalentinRAM.Anexample“main”programisprovidedtoshowhowtousethesubroutine.MFloatingPointtoASCIIConversionAN670Table2depictsMicrochip’s32-bitfloatingpointregisterAuthors:RickEvansRAMusage.Thebitlabeled“S”isthesignbit.TheseMicrochipTechnology,Inc.registersarecollectivelycalledAARG.ThefloatingpointroutinesrequirethattheargumentsbeputinAARGandBARG(BARGisthesecondargument,sameformatas……