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CCS/CC3220SF-LAUNCHXL: configTOTAL_HEAP_SIZE for CC3220SF

Jay09
Expert 1030 points
Part Number: CC3220SF-LAUNCHXL
Other Parts Discussed in Thread: CC3220SF

Tool/software: Code Composer Studio

I was looking at the FreeRTOS.h file generated by CCS. In it there's this line: 

#define configTOTAL_HEAP_SIZE           ( ( size_t ) ( 0x8000 ) )

Which is about 30k of space for the heap. According to the spec sheet, the CC3220SF has 256k of ram. Can I safely increase this value to:

#define configTOTAL_HEAP_SIZE ( ( size_t ) (0x30D40))

I did this an am now able to allocate ram for more tasks. What is the recommended setting for this parameter on the CC3220SF?

Thanks! 

  • 0
    Guru 73375 points

    Hi,

    General answer does not exist. This depends on requirements of your application.

    If you have big heap, you will have enough space for you dynamically allocated variables/buffer. But you may not have enough space for your static variables. Please use Memory Allocation tool in CCS to determine how much of static memory need your code.

    Jan

  • 0 in reply to Jan D
    Expert 1030 points

    Hi Jan,

    Here are the results from that tool. So is the story that, from this graphic, I have 47k left over for heap?

    Thanks! 

  • 0 in reply to Jay09
    Guru 73375 points

    Hi,

    You have 47kB unused RAM. You can extend your heap or use some static variables. Choice is up to you.

    For detail information please click to SRAM...

    Jan

  • 0 in reply to Jay09
    Expert 1030 points

    I'm sorry, I didn't realize the tool factors in the heap size! That's great! To get a better view of things, here is what the tool reflects if my heap size is zero:

    If I set heap to 200k