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89v51rd2 error 127

dipali b

I am using P89V51RD2 for my project I have choosen this IC because it have 1K Ram
My programme is compiling but while linking I ma getting following errors.

*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  ask_disp_key_val
    MODULE:  mc_ad1.obj (MC_AD1)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  chk_keys
    MODULE:  mc_ad1.obj (MC_AD1)
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  chk_test_over
    MODULE:  mc_ad1.obj (MC_AD1)
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  ask_disp_key_val
    MODULE:  mc_ad1.obj (MC_AD1)
    ADDRESS: 10014D3H
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  chk_keys
    MODULE:  mc_ad1.obj (MC_AD1)
    ADDRESS: 10014D9H
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  chk_test_over
    MODULE:  mc_ad1.obj (MC_AD1)
    ADDRESS: 10014DCH
*** ERROR L127: UNRESOLVED EXTERNAL SYMBOL
    SYMBOL:  MAIN
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C_INIT)
*** ERROR L128: REFERENCE MADE TO UNRESOLVED EXTERNAL
    SYMBOL:  MAIN
    MODULE:  C:\KEIL\C51\LIB\C51L.LIB (?C_INIT)
    ADDRESS: 1000E67H
Program Size: data=28.1 xdata=143 const=0 code=6729
Target not created

I am using some of the variables as xdata,I am confused whether this problem is because of xdata?
I have done the folloeing changes to startup file also

XDATASTART      EQU     0H      ; the absolute start-address of XDATA memory
XDATALEN        EQU     2ffH      ; the length of XDATA memory in bytes.

AUXR1 DATA  08EH               ; add SFR definition

STARTUP1:
                               ; enable on-chip xdata RAM
          ANL AUXR1,#NOT 02H   ; AUXR1/Bit 1 (clear to 0 to enable on-chip XRAM)

also my target settings are
memory model : large
code Rom : Large
Use onchip Rom:selected
Use onchi XRam :selected
Use Multiple DPTR : Selected

Please help me out.

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  • 0

    Why large memory model - is it because you want your code to be large and bloated? Why not manually specify what should be separately stored?

    Where are your variables. It seems like your project isn't including all source files. Or that you have just said that "somewhere" there will be these symbols but have never given any module the responsibility of owning such symbols. Note declare and define of variables.

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  • 0

    Why large memory model - is it because you want your code to be large and bloated? Why not manually specify what should be separately stored?

    Where are your variables. It seems like your project isn't including all source files. Or that you have just said that "somewhere" there will be these symbols but have never given any module the responsibility of owning such symbols. Note declare and define of variables.

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