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Original question:
TMS320F28388D: TMS320F28388D: use global shared RAM as heap on CPU2
Tool/software:
Hello,
I'm trying to use a DxRAM 2-5 combination as the heap for CPU2, but malloc is returning a null pointer every time.
In the sysconfig/MEMCFG for CPU1 I have Dx RAM 2-5 configured to have CPU2 as the controller for the section, in the sysconfig/CMD for CPU2 I have a DxRAM memory combination of DxRAM 2-5 called DATA and sysmem Load Memory of DATA.
The MCUCNF1 register for CPU1 is set to 0x3C, but on CPU2 it is set to 0x00.
I get the same result if I use a memory combination of just D2RAM called cpu2Heap and declare this sysmem Load Memory, so it seems that the issue is with the memory combination.
Are there any configuration steps I've missed, or are memory combinations not able to be used in this way?
Thanks,
Alex
Hi Vivek,
Thanks for getting back to me on this!
I used the "Ask a related question" feature from a question about Global Shared Ram, my question is just about the use of a DxRAM combination as sysmem on CPU2.
My understanding was that CPU2 could be assigned by CPU1 to be the controller of DxRAM2-5 using the sysconfig:
Have I misunderstood this?
Thanks,
Alex
That does not look correct. Please see below snapshot from Memory Map of device datasheet.
Can you try updating it as per this memory map and see if this helps.
Vivek Singh
