Heap in external memory?

MikeH

I am using an application library that requires ~200k heap. Since the C5515 does not have enough space, can I allocate a heap on the external NOR flash? If so how?

over 13 years ago

0 Hyun Kim over 13 years ago

TI__Genius 14965 points

Hi,

It can be done but it'll take extra steps to do it. Are you expect accessing heap as read and write? Using of NOR in writing will be challenging. SDRAM will be easy to use.

Regards,

Hyun

0 MikeH over 13 years ago in reply to Hyun Kim

Guru 15580 points

Hyun,

Hyun Kim said:
Are you expect accessing heap as read and write?

Both.

Hyun Kim said:
SDRAM will be easy to use.

Are you saying to add an SD card to the board an use that as the heap space? Wouldn't the memory access be very slow?

0 Hyun Kim over 13 years ago in reply to MikeH

TI__Genius 14965 points

Hi,

No. it's not SD card. I mean Synchronous DRAM.

Regards,

Hyun

0 MikeH over 13 years ago in reply to Hyun Kim

Guru 15580 points

Hyun Kim said:

I mean Synchronous DRAM.

Can you please show me the location of SDRAM in the EZDsp memory map?

0 Cong Van Nguyen over 13 years ago

Intellectual 970 points

I don't see any possibility to use NOR flash as a heap memory for a closed-source library. For such a big amount of heap, definitely you need an external RAM, which is not available on eZDSP.

0 MikeH over 13 years ago in reply to Cong Van Nguyen

Guru 15580 points

Thanks Cong. That's what I expected to hear from the TI expert.

0 Mark M over 13 years ago in reply to MikeH

TI__Mastermind 30130 points

Hi Mike,

You can fully evaluate C5515 DSP with SDRAM on the C5515 EVM instead of the C5515 eZdsp.

Spectrum Digital has SDRAM code and the CSL has SDRAM code.

Hope this helps,
Mark

0 MikeH over 13 years ago in reply to Mark M

Guru 15580 points

Thanks Mark. I may have to spring for the EVM if I can't reduce my heap requirements.

0 user4359467 over 10 years ago in reply to Mark M

Prodigy 10 points

HI Mark,
I am using EVM5515. How can I allocate heap in mobile SDRAM?

0 Sivaraj Kuppuraj over 10 years ago in reply to user4359467

TI__Mastermind 35645 points

Hi,

Please create a new request since this is a closed thread which would be paid lesser attention than a new one.

Thanks & regards,
Sivaraj K

Processors

Processors forum

Heap in external memory?