* [ECOS] Use of internal and external ram
@ 2001-04-22 23:36 Ho Shui Choy Stanley PS03B NCS
2001-04-23 8:27 ` Lewin A.R.W. Edwards
0 siblings, 1 reply; 3+ messages in thread
From: Ho Shui Choy Stanley PS03B NCS @ 2001-04-22 23:36 UTC (permalink / raw)
To: Ecos-Discuss (E-mail)
I am building eCos for AT91EB40
In my platform there is internal ram(addr 0x00100000) and external ram(addr
0x02000000) how do I make use of both available ram?
Is it possible to specify that the stack space resides in the internal ram
while data in external ram?
Thanks
Stanley
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ECOS] Use of internal and external ram
2001-04-22 23:36 [ECOS] Use of internal and external ram Ho Shui Choy Stanley PS03B NCS
@ 2001-04-23 8:27 ` Lewin A.R.W. Edwards
2001-04-23 9:48 ` [ECOS] IO Streams Andy Simpkins
0 siblings, 1 reply; 3+ messages in thread
From: Lewin A.R.W. Edwards @ 2001-04-23 8:27 UTC (permalink / raw)
To: Ho Shui Choy Stanley PS03B NCS, Ecos-Discuss (E-mail)
Hi Stanley,
>I am building eCos for AT91EB40
Question: Where did you get the sources for this? Is this the old archived
port mentioned on ecos-discuss some weeks ago, or are you collaborating
with Daniel Andersson, or are you developing an independent port?
>In my platform there is internal ram(addr 0x00100000) and external ram(addr
>0x02000000) how do I make use of both available ram?
>Is it possible to specify that the stack space resides in the internal ram
>while data in external ram?
It's certainly possible (I do something very similar on the EP7212 - user,
FIQ, IRQ, SVC stacks are in on-chip SRAM and heap is in off-chip DRAM).
It's just a matter of tinkering with the startup code and linker script.
For elegant integration into eCos, especially given that most people who
use it are going to port it to "real" hardware sometime, I would suggest
that you expose this stuff to configtool if possible.
=== Lewin A.R.W. Edwards (Embedded Engineer)
Work: http://www.digi-frame.com/
Personal: http://www.zws.com/ and http://www.larwe.com/
"... a man who is endowed with real qualities of leadership will be tempted
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but rather for a man who is capable of bargaining for the favour of the
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them accordingly."
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ECOS] IO Streams
2001-04-23 8:27 ` Lewin A.R.W. Edwards
@ 2001-04-23 9:48 ` Andy Simpkins
0 siblings, 0 replies; 3+ messages in thread
From: Andy Simpkins @ 2001-04-23 9:48 UTC (permalink / raw)
To: Ecos-Discuss (E-mail)
Hi there,
Does anyone use libiostream with eCos?
If so what steps do I need to take to use it?
If not does eCos support IO streams and if so what do I need to use and what
files do I need to look at?
I don't fully understand the subject yet so please go gently with any reply!
Kind regards
Andy
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2001-04-22 23:36 [ECOS] Use of internal and external ram Ho Shui Choy Stanley PS03B NCS
2001-04-23 8:27 ` Lewin A.R.W. Edwards
2001-04-23 9:48 ` [ECOS] IO Streams Andy Simpkins
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