multiple heap selection

Mohammed Fawzy

Hi,

I'm using CCS Version: 6.1.0.00104, TIRTOS: tirtos_tivac_2_14_04_31 with TM4C129.

My Hardware design contain 8MB of external RAM and i was able to create two heap instance at the same time, internal heap (internal memory) and external heap (external memory). i want to make the internal memory for the small/fast heap allocation for tasks, mutex, mbox, so on. while the external memory for the large/slow heap allocation like WOLFSSL.

var heapExternalMemoryParams = new HeapMem.Params;
heapExternalMemoryParams.size = 0x40000;
heapExternalMemoryParams.sectionName = ".externalHeap";
heapExternalMemoryParams.instance.name = "externalHeap";
Program.global.externalHeap = HeapMem.create(heapExternalMemoryParams);
/* Internal heap
*/
var heapInternalMemoryParams = new HeapMem.Params;
heapInternalMemoryParams.size = 0x26000;
heapInternalMemoryParams.sectionName = ".bss";
heapInternalMemoryParams.instance.name = "internalHeap";
Program.global.internalHeap = HeapMem.create(heapInternalMemoryParams);

i set the default allocation for the external memory using

Memory.defaultHeapInstance = Program.global.externalHeap;

and i selected the internal heap for the tasks, mutex, mbox, so on., using

BIOS.common$.instanceHeap = Program.global.internalHeap;
Semaphore.common$.instanceHeap = Program.global.internalHeap;
Swi.common$.instanceHeap = Program.global.internalHeap;
Task.common$.instanceHeap = Program.global.internalHeap;
Event.common$.instanceHeap = Program.global.internalHeap;
Timer.common$.instanceHeap = Program.global.internalHeap;
Mailbox.common$.instanceHeap = Program.global.internalHeap;
GateMutexPri.common$.instanceHeap = Program.global.internalHeap;
Diags.common$.instanceHeap = Program.global.internalHeap;

unfortunately, the task stacks are allocated in the external memory while it should be allocated in the internal memory as expected.

the cmd and cfg file are included as well.5466.code.rar

Please advice.

Thanks,

Mohammed Fawzy

over 7 years ago

0 Thomas Doering over 7 years ago

Intellectual 575 points

Hi Mohammed,

try to set

Task.defaultStackHeap = Program.global.internalHeap;

Regards,
Thomas.

0 Mohammed Fawzy over 7 years ago in reply to Thomas Doering

Expert 1860 points

Thank you Thomas,

but i'm setting the default stack to the external heap on purpose, because theoretically i can specify the heap for TI-RTOS module like Task, Mutex, so on. but i can't do it for the other 3rd parity module like the WOLFSSL. so my target was to keep the external memory for any other module rather than the OS modules.

Mohammed

0 Thomas Doering over 7 years ago in reply to Mohammed Fawzy

Intellectual 575 points

Hi,

Hm, sorry. I must have misunderstood your request.

In your initial post you stated, that "unfortunately, the task stacks are allocated in the external memory while it should be allocated in the internal memory as expected.". So I thought your goal was, to allocate every task stack from your "InternalHeap"....

Regards,
Thomas

0 Sasha Slijepcevic over 7 years ago in reply to Mohammed Fawzy

TI__Mastermind 37985 points

Mohammed,
when you say you want to specify the heap for TI-RTOS modules, are you talking about heap that will be used for dynamically created objects? That's what Task.common$.instanceHeap is for, and you already set it to the internal heap. But, even though a Task object is allocated to the internal heap, its stack is not automatically allocated to the same heap. That's what the parameter defaultStackHeap is for. So, as Thomas said, you have to specify defaultTaskHeap if you want Task stacks to go to the internal heap.

0 Mohammed Fawzy over 7 years ago in reply to Sasha Slijepcevic

Expert 1860 points

Thank you Sasha you are correct!
Sorry Thomas and thank you!
Thomas was correct from his first post, but it seems that i didn't have my coffee when read the post. Sorry again.

0 Thomas Doering over 7 years ago in reply to Mohammed Fawzy

Intellectual 575 points

No problem. Coffee is what keeps us "running" ;)

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multiple heap selection