Parallella Community

e_alloc() only maps memory in the shared area.

You're reading/writing to completely different locations, not surprisingly since the arguments are completely different objects.

Hi,

Thanks for the info.

The e-bandwidth-test example code tests host to ERAM speed using this method, is this a different ERAM then?

Hi,

It was me getting confused with the naming conventions.

As far as I see it there is:

1. Host Ram
2. Shared ram
3. Epiphany local ram

I took ERAM to mean 3 where as far as I can see it is actually 2.

Cheers

Andy

Yes the object in your example called "eram" is in 2, the shared memory.

Hence I would give it a more accurate and mnemonic name, like "sram" and reserve the mnemonic "eram" for e(piphany) ram.

Why not use the official terms?
- Host Memory (not really important when programming for the Epiphany, since it can't access it)
- Shared Memory or Shared DRAM (or External DRAM or DRAM, but these suggest different things to me)
- Local Memory or SRAM
They are used in the official documentation and in the linker scripts. ERAM then means "External RAM".

Hi,

ERAM is not defined in the documentation at all as far as I can see.