屏幕显示代码.pdf

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1、###STARTUP.51:$NOMOD51;------------------------------------------------------------------------------;ThisfileispartoftheC51Compilerpackage;Copyright(c)1988-2005KeilElektronikGmbHandKeilSoftware,Inc.;Version8.01;;***<<>>***;---------------------------------------

2、---------------------------------------;STARTUP.A51:Thiscodeisexecutedafterprocessorreset.;;TotranslatethisfileuseA51withthefollowinginvocation:;;A51STARTUP.A51;;TolinkthemodifiedSTARTUP.OBJfiletoyourapplicationusethefollowing;Lx51invocation:;;Lx51yourobjectfilelist,STARTUP.OBJcontrols;;------------

3、------------------------------------------------------------------;;User-definedPower-OnInitializationofMemory;;WiththefollowingEQUstatementstheinitializationofmemory;atprocessorresetcanbedefined:;;IDATALEN:IDATAmemorysize<0x0-0x100>;Note:Theabsolutestart-addressofIDATAmemoryisalways0;Th

4、eIDATAspaceoverlapsphysicallytheDATAandBITareas.IDATALENEQU80H;;XDATASTART:XDATAmemorystartaddress<0x0-0xFFFF>;TheabsolutestartaddressofXDATAmemoryXDATASTARTEQU0;;XDATALEN:XDATAmemorysize<0x0-0xFFFF>;ThelengthofXDATAmemoryinbytes.XDATALENEQU0;;PDATASTART:PDATAmemorystartaddress<0x0-0x

5、FFFF>;TheabsolutestartaddressofPDATAmemoryPDATASTARTEQU0H;;PDATALEN:PDATAmemorysize<0x0-0xFF>;ThelengthofPDATAmemoryinbytes.PDATALENEQU0H;;;------------------------------------------------------------------------------;;ReentrantStackInitialization;;ThefollowingEQUstatementsdefinethe

6、stackpointerforreentrant;functionsandinitializedit:;;StackSpaceforreentrantfunctionsintheSMALLmodel.;IBPSTACK:EnableSMALLmodelreentrantstack;StackspaceforreentrantfunctionsintheSMALLmodel.IBPSTACKEQU0;setto1ifsmallreentrantisused.;IBPSTACKTOP:EndaddressofSMALLmodelstack<0x0-0xFF>;Sett

7、hetopofthestacktothehighestlocation.IBPSTACKTOPEQU0xFF+1;default0FFH+1;;;StackSpaceforreentrantfunctionsintheLARGEmodel.;XBPSTACK:EnableLARGEmodelreentrantstack;Stackspaceforreentrantfunc