• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 52 subscribers
  • Views 5079 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Undefined first Referenced symbol

ipower
Prodigy 140 points
Other Parts Discussed in Thread: CONTROLSUITE

Hello All,

I have the following question after build my project. I am running CCS 5.5 on win7 and the compiler is 6.2. I have checked the similar topic in our E2E, but still have not got a solution.

The ePWM is decleared in "PWM_ComplPairDB_Cnf.C" : extern volatile struct EPWM_REGS *ePWM[];

and  "PWM_ComplPairDB_Cnf.C" includes the header file EPwm.h where the EPWM_REGS is defined.

Besides, I checked header file path is included in the compiler and also linker.

Thank you for your help!

Tian


**** Build of configuration Debug for project newLLC ****

"C:\\ti\\ccsv5\\utils\\bin\\gmake" -k all
'Building target: newLLC.out'
'Invoking: C2000 Linker'
"C:/ti/ccsv5/tools/compiler/c2000_6.2.0/bin/cl2000" -v28 -ml -mt --cla_support=cla0 --float_support=fpu32 --vcu_support=vcu0 -g --diag_warning=225 --display_error_number --diag_wrap=off -z -m"newLLC.map" --stack_size=0x300 --warn_sections -i"C:/ti/ccsv5/tools/compiler/c2000_6.2.0/lib" -i"C:/ti/controlSUITE/device_support/f2806x/v151/F2806x_headers/include" -i"C:/ti/controlSUITE/libs/app_libs/digital_power/f2806x_v3.5/asm_macros" -i"C:/ti/controlSUITE/libs/app_libs/digital_power/f2806x_v3.5/include" -i"C:/ti/controlSUITE/libs/math/IQmath/v15c/include" -i"C:/Users/tliu/Documents/TI_LLC/headers/F2806x_peripheral_headers" -i"C:/Users/tliu/Documents/TI_LLC/headers/F2806x_common/include" -i"C:/Users/tliu/Documents/TI_LLC/headers/F2806x_headers/include" -i"C:/ti/ccsv5/tools/compiler/c2000_6.2.0/include" --reread_libs --display_error_number --diag_wrap=off --xml_link_info="newLLC_linkInfo.xml" --rom_model -o "newLLC.out" "./SciCommsGui.obj" "./PWM_ComplPairDB_Cnf.obj" "./PWM_1ch_UpCntDB_Compl_Cnf.obj" "./PWM_1ch_UpCntDB_Cnf.obj" "./PWM_1ch_Cnf.obj" "./HVLLC-Main.obj" "./HVLLC-DevInit_F28069.obj" "./HVLLC-DPL-ISR.obj" "./F2806x_usDelay.obj" "./F2806x_GlobalVariableDefs.obj" "./F2806x_CodeStartBranch.obj" "./ADC_SOC_Cnf.obj" "../F28027_FLASH_HVLLC.CMD" "C:/ti/controlSUITE/device_support/f2806x/v151/F2806x_headers/cmd/F2806x_Headers_nonBIOS.cmd" "C:/ti/controlSUITE/libs/math/IQmath/v15c/lib/IQmath.lib" -l"libc.a"
<Linking>

undefined first referenced
symbol in file
--------- ----------------
_ePWM ./PWM_ComplPairDB_Cnf.obj

error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "newLLC.out" not built

>> Compilation failure
gmake: *** [newLLC.out] Error 1
gmake: Target `all' not remade because of errors.

**** Build Finished ****

  • 0
    TI__Guru**** 236095 points

    I am not familiar with controlSUITE projects, but I can offer some insight.

    ipower said:
    The ePWM is decleared in "PWM_ComplPairDB_Cnf.C" : extern volatile struct EPWM_REGS *ePWM[];

    This is a declaration of ePWM.  It is not definition, which means it does not cause memory to be allocated for it.

    ipower said:
    and  "PWM_ComplPairDB_Cnf.C" includes the header file EPwm.h where the EPWM_REGS is defined.

    This header file contains the definition of the type EPWM_REGS.  But no definition of ePWM.  Again ePWM has no memory allocated for it.

    And that is why the linker complains that ePWM is undefined.

    Please visit here for a general overview of this entire topic.

    I'm sorry I cannot tell you where ePWM should be defined.  That requires detailed knowledge of controlSUITE.

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    Prodigy 140 points

    Hello George,

    Thank you for pointing out that. You are correct. After deleting the extern in the source file, that means ePWM[] is defined and then the build passed.

    Thank you!

    Tian