heap size for stdio.h

Adam said:

I wrote code as below:

for(i=0; i<50000; i++) { sprintf(&buferRS[0],"%12.4f %12.4f %12.4f %12.4f ",a,b,c,d); ....;}

My program goes different way each time I start it. I suspect heap size. When I increase

its size program running better, more stable

Please read:

http://processors.wiki.ti.com/index.php/Tips_for_using_printf

Adam said:

How do I  estimate correct heap size?

The best way is to use a big value, decrease and test it.

You can use the same trick described in the forum post below for the heap:

http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/112/p/48982/173423.aspx#173423

Adam said:

Should I use SDRAM or IRAM for heap? 

That should not matter. If you put in external memory, just make sure you are using cache. 

Also, if you are using DSP/BIOS, make sure that you increase the TSKs stacks, not only the system stack (at task properties). With DSP/BIOS you can see how much of the heap is being used at the menu: DSP/BIOS->Kernel/Object view, and select the MEM segment that contains the heap.