malloc() not working in F28335

Irfan Ahmad

With the following settings,

CCS: v 3.3.38.2
Code Generation Tool: v5.2.13
Development Board: DSC F28335
Project Settings: Hardware FPU (rts2800_fpu32.lib, fpu32 support)
Autoinit Model: Run Time Autoinitialization
Heap Size: 0x800

I am having problem in using malloc() function as it does not execute. When I tried to debug the code the following lines of code directs the controller to "illegal ISR".

00AE85 761F MOVW   DP,#0x032D
00AE87 C534 MOVL   XAR7,@52
00AE88 3E67 LCR    *XAR7
00AE89 761F MOVW   DP,#0x032D

over 11 years ago

0 Gautam Iyer over 11 years ago

Guru 192875 points

Hi Irfan,

Check these links out: they all emphasize on heap size

http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/t/100641.aspx

http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/t/289895.aspx

Regards,

Gautam

0 Irfan Ahmad over 11 years ago in reply to Gautam Iyer

Prodigy 110 points

Thanks Gautam,

But I am not using DSP BIOS and therefore I have no mechanism to precisely determine the heap usage.

BR,

Irfan

0 Gautam Iyer over 11 years ago in reply to Irfan Ahmad

Guru 192875 points

Are you using any particular ISRs in your code?

0 Irfan Ahmad over 11 years ago in reply to Gautam Iyer

Prodigy 110 points

No, I am not using any ISR.
Currently, I am allocating 3KB (Heap Size).

Irfan

0 Gautam Iyer over 11 years ago in reply to Irfan Ahmad

Guru 192875 points

Irfan,

From a C reference below:

"To allocate memory on the heap, you must use malloc() or calloc(), which are built-in C functions. Once you have allocated memory on the heap, you are responsible for using free() to deallocate that memory once you don't need it any more. If you fail to do this, your program will have what is known as a memory leak. That is, memory on the heap will still be set aside (and won't be available to other processes)"

Please check the above and revert.

Regards,

Gautam

0 Irfan Ahmad over 11 years ago in reply to Gautam Iyer

Prodigy 110 points

Gautam,

I am doing the same for deallocating the memory, but my error arises while I am still in the malloc() function. The assembly lines in the first post of mine are from malloc() function.

BR,

Irfan

0 Gautam Iyer over 11 years ago in reply to Irfan Ahmad

Guru 192875 points

Irfan, you're facing some kind of memory conflict. I would suggest you to wait for another half day to get some response from TI employee :)

Regards,

Gautam

0 Irfan Ahmad over 11 years ago in reply to Gautam Iyer

Prodigy 110 points

Gautam, I think I digged the problem, but I have to verify it. As I have told that I am not using DSP BIOS and instead tried to develop my own BSP. When I looked back and debugged, I found that I am missing _c_int00 for copying initialization tables.

Thanks & Regards,

Irfan

0 Gautam Iyer over 11 years ago in reply to Irfan Ahmad

Guru 192875 points

Do check and let me know.

Regards,

Gautam

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malloc() not working in F28335