"Undefined symbol" Error message.

Hatus

Other Parts Discussed in Thread: CCSTUDIO, TEST2

Hello everyone,

I'm beginning a new project with the F2808 DSP. I followed the recommended steps (C280x/C2801x C/C++ Header Files an Peripheral Examples Quick Start, pages 20-25) to start a project with the structure of registers (v 1.60) alredy done. But when I included the file "DSP280x_CpuTimers.c", I had this error:

#############################################################

---------------------------- genesis.pjt - Debug ----------------------------

[DSP280x_CpuTimers.c] "C:\CCStudio_v3.3\C2000\cgtools\bin\cl2000" -g -pdr -fr"C:/CCStudio_v3.3/MyProjects/genesis/Debug" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_headers/include" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_common/include" -d"_DEBUG" -d"LARGE_MODEL" -ml -v28 -@"../../../../../../genesis/Debug.lkf" "DSP280x_CpuTimers.c"

[DSP280x_GlobalVariableDefs.c] "C:\CCStudio_v3.3\C2000\cgtools\bin\cl2000" -g -pdr -fr"C:/CCStudio_v3.3/MyProjects/genesis/Debug" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_headers/include" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_common/include" -d"_DEBUG" -d"LARGE_MODEL" -ml -v28 -@"../../../../../../genesis/Debug.lkf" "DSP280x_GlobalVariableDefs.c"

[genesis.cpp] "C:\CCStudio_v3.3\C2000\cgtools\bin\cl2000" -g -pdr -fr"C:/CCStudio_v3.3/MyProjects/genesis/Debug" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_headers/include" -i"C:/CCStudio_v3.3/MyProjects/genesis/../tidcs/c28/DSP280x/v160/DSP280x_common/include" -d"_DEBUG" -d"LARGE_MODEL" -ml -v28 -@"Debug.lkf" "genesis.cpp"

"genesis.cpp", line 135: remark: controlling expression is constant

[Linking...] "C:\CCStudio_v3.3\C2000\cgtools\bin\cl2000" -@"Debug.lkf"

>> warning: entry point symbol _c_int00 undefined

undefined first referenced

symbol in file

--------- ----------------

FS$$MPY C:\CCStudio_v3.3\MyProjects\genesis\Debug\DSP280x_CpuTimers.obj

FS$$TOL C:\CCStudio_v3.3\MyProjects\genesis\Debug\DSP280x_CpuTimers.obj

>> error: symbol referencing errors - './Debug/genesis.out' not built

>> Compilation failure

Build Complete,

2 Errors, 1 Warnings, 1 Remarks.

#############################################################

I found the error generator. It was a floating point multiplication as showed below in the code of “DSP280x_CpuTimers.c”.

#############################################################

void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period)

{

Uint32 temp;

// Initialize timer period:

Timer->CPUFreqInMHz = Freq;

Timer->PeriodInUSec = Period;

temp = (long) (Freq * Period); // <- This is the line with problem.

Timer->RegsAddr->PRD.all = temp;

// Set pre-scale counter to divide by 1 (SYSCLKOUT):

Timer->RegsAddr->TPR.all = 0;

Timer->RegsAddr->TPRH.all = 0;

// Initialize timer control register:

Timer->RegsAddr->TCR.bit.TSS = 1; // 1 = Stop timer, 0 = Start/Restart Timer

Timer->RegsAddr->TCR.bit.TRB = 1; // 1 = reload timer

Timer->RegsAddr->TCR.bit.SOFT = 1;

Timer->RegsAddr->TCR.bit.FREE = 1; // Timer Free Run

Timer->RegsAddr->TCR.bit.TIE = 1; // 0 = Disable/ 1 = Enable Timer Interrupt

// Reset interrupt counter:

Timer->InterruptCount = 0;

}

#############################################################

When I comment the line “temp = (long) (Freq * Period);”, the error disappear.

After comment this line, I made a test in the main source file, writing this code:

#############################################################

int main(void)

{

float test1, test2, test3;

test1 = 1.0;

test2 = 2.0;

test3 = test1 * test2;

...

}

#############################################################

And then, this is the error message:

#############################################################

---------------------------- genesis.pjt - Debug ----------------------------

"DSP280x_CpuTimers.c", line 97: warning: variable "temp" is used before its value is set

"genesis.cpp", line 140: remark: controlling expression is constant

"genesis.cpp", line 40: warning: variable "test3" was set but never used

[Linking...] "C:\CCStudio_v3.3\C2000\cgtools\bin\cl2000" -@"Debug.lkf"

>> warning: entry point symbol _c_int00 undefined

undefined first referenced

symbol in file

--------- ----------------

FS$$MPY C:\CCStudio_v3.3\MyProjects\genesis\Debug\genesis.obj

>> error: symbol referencing errors - './Debug/genesis.out' not built

>> Compilation failure

Build Complete,

2 Errors, 3 Warnings, 1 Remarks.

#############################################################

I changed the test operation to Add, and then the error was:

#############################################################

...

undefined first referenced

symbol in file

--------- ----------------

FS$$ADD C:\CCStudio_v3.3\MyProjects\genesis\Debug\genesis.obj

...

#############################################################

It looks like a floating point operation error. Is it right? How can I fix it?

Thank you in advance.

Regards,

Hatus

over 16 years ago

0 BrandonAzbell over 16 years ago

TI__Guru 63870 points

It appears that you need to include the Run-Time Support library to your project.
Have you done this already? The RTS library should be in your code generation tools ./lib directory.

0 Hatus over 16 years ago in reply to BrandonAzbell

Prodigy 50 points

Hi Brandon,

That's it. I included it and worked well.

Thank you!

Regards,

Hatus

C2000™︎ microcontrollers

C2000 microcontrollers forum

"Undefined symbol" Error message.