Dave's FreeRTOS Helpers now on GitHub

Kernel
4

Dave,

Thank you for your contribution! Your page was very helpful to me. I am one of those unsuspecting embedded developers that got bit by sprintf using %f.

I’ve got heap_useNewlib_NXP.c running on Cypress PSoC 6 (M4). I’ve attached my linker script in case anyone finds it useful. I decided to give the heap all available memory:

__HeapLimit = __StackLimit - 1;
HEAP_SIZE = __HeapLimit - __HeapBase;

Then, I didn’t know how big it was, so I added this to heap_useNewlib_NXP.c:

size_t xPortGetHeapSize( void ) PRIVILEGED_FUNCTION {
    return (size_t)&HEAP_SIZE; 
}

so I can use this command:

> heap-stats
Total heap size:        57183
Free bytes in the heap now:     29919

Looks like I’ve got lots of room now. When I first switched, it seemed that newlib’s heap used more space than heap4, and I was already tight on space, so I had problems. Eventually I switched to newlib-nano supplemented with Marco Paland’s printf.

Thanks again, Carl

cy8c6xx7_cm4_dual.CK3.zip (3.9 KB)

EDIT: I should have mentioned that I am running with newlib version 3.3. I get the warning, but it seems to work fine.

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