RTX51 TINY: MULTIPLE PUBLIC DEFINITIONS RTX_RAMTOP (PART 2)

Information in this article applies to:

• RTX51 Tiny

QUESTION

I recently upgraded my compiler. Now my project, which uses RTX Tiny, generates linker errors:

*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_KERNAL)
*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS
    SYMBOL:  ?RTX_RAMTOP
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_KERNAL)
*** WARNING L4: DATA SPACE MEMORY OVERLAP
    FROM:    0008H
    TO:      000DH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_CREATE)
    ADDRESS: 0731H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_RAMTOP
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_CREATE)
    ADDRESS: 0745H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_CREATE)
    ADDRESS: 076FH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_DELETE)
    ADDRESS: 07BAH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_RAMTOP
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_DELETE)
    ADDRESS: 07D3H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_DELETE)
    ADDRESS: 07F1H
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_DELETE)
    ADDRESS: 080CH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_DELETE)
    ADDRESS: 081FH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_RUNNING_TASK_ID)
    ADDRESS: 086DH
*** ERROR L118: REFERENCE MADE TO ERRONEOUS EXTERNAL
    SYMBOL:  ?RTX_CURRENTTASK
    MODULE:  C:\KEIL\C51\LIB\RTX51TNY.LIB (?RTX51_TINY_OS_WAIT)
    ADDRESS: 0875H

The code was working before the upgrade. What am I doing wrong? For complience reasons, I need to use RTX tiny version 1, and cannot upgrade to RTXtiny2

ANSWER

C51 version 7.02 includes RTX51 Tiny Version 2 (RtxTiny2). RtxTiny2 contains several new enhancements. Version 7.02 by default uses the RtxTiny2 library. However, it is possible to use RTX tiny version 1's libary.

Manually add the RTX51 Tiny Version 1 library to the project workspace window. The version 1 libraries are located at:
\Keil\C51\RTX_TINY\RTX51TNY.LIB

When you add the version 1 library to your project, the linker will not link the version 2 library into your project. This will remove the errors shown above.

This option is best if you must use RTX51 Tiny Version 1, and you are using CONF_TNY.A51 (the configuration file for RTX tiny version 1).

Note that the old configuration file is CONF_TNY.A51 and is located at:
\Keil\C51\RTX_TINY\CONF_TNY.A51 (Upper case file name)

The new configuration file is CONF_TNY.A51 and is located at:
\Keil\C51\RtxTiny2\SourceCode\Conf_tny.A51 (Lower case file name)

MORE INFORMATION

• Refer to the RTX51 Tiny User's Guide.
• Refer to What's New in the RTX51 Tiny User's Guide.

SEE ALSO

• RTX51 TINY: ERROR L104 (MULTIPLE PUBLIC DEFINITIONS) OF MAIN
• RTX51 TINY: USER INTERRUPT FUNCTION DOES NOT WORK
• RTX51 TINY: INTERRUPTS STOP WORKING
• RTX51 TINY: MULTIPLE PUBLIC DEFINITIONS RTX_RAMTOP (PART 1)

Last Reviewed: Sunday, October 29, 2006