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Discussion Groups | LPC2000 | Keil RAM function problem
Discussion group dedicated to the Philips LPC2000 family of ARM MCUs
Keil RAM function problem - beastkiki - Apr 20 6:29:39 2006
Hi all,
I use Keil uVision 3 with LPC2212.
I must write one function in assembler and execute it from internal
RAM on LPC2212.
How can I do that?
I am trying:
AREA ?PR?RAMFunc, ERAM
RSEG ?PR?RAMFunc
PUBLIC RAMFunc?A
PUBLIC RAMFunc?T
; veneer code for Thumb entry
RAMFunc?T PROC CODE16
bx r15
nop
ENDP
RAMFunc?A PROC CODE32
stmfd sp!,{r0-r12,lr}
ldr r0,=ioclr0
........
ENDP
But I received error SYNTAX ERROR on AREA line.:(
What is the problem?
I really need help!
(You need to be a member of lpc2000 -- send a blank email to lpc2000-subscribe@yahoogroups.com )
I use Keil uVision 3 with LPC2212.
I must write one function in assembler and execute it from internal
RAM on LPC2212.
How can I do that?
I am trying:
AREA ?PR?RAMFunc, ERAM
RSEG ?PR?RAMFunc
PUBLIC RAMFunc?A
PUBLIC RAMFunc?T
; veneer code for Thumb entry
RAMFunc?T PROC CODE16
bx r15
nop
ENDP
RAMFunc?A PROC CODE32
stmfd sp!,{r0-r12,lr}
ldr r0,=ioclr0
........
ENDP
But I received error SYNTAX ERROR on AREA line.:(
What is the problem?
I really need help!
(You need to be a member of lpc2000 -- send a blank email to lpc2000-subscribe@yahoogroups.com )
Re: Keil RAM function problem - Ken Wada - Apr 20 12:30:27 2006
Try putting double quoutes around ERAM... as follows:
AREA ?PR?RAMFunc, "ERAM"
This should work.
By the way...why don't you use the __ram directive, (and code your
function in C...you can still use in-line assembly if you want...)
that Keil gives you? This is far easier to do, and works very well!
Ken Wada
--- In l...@yahoogroups.com, "beastkiki" wrote:
>
> Hi all,
> I use Keil uVision 3 with LPC2212.
> I must write one function in assembler and execute it from internal
> RAM on LPC2212.
> How can I do that?
>
> I am trying:
> AREA ?PR?RAMFunc, ERAM
> RSEG ?PR?RAMFunc
>
> PUBLIC RAMFunc?A
> PUBLIC RAMFunc?T
> ; veneer code for Thumb entry
> RAMFunc?T PROC CODE16
> bx r15
> nop
> ENDP
>
> RAMFunc?A PROC CODE32
>
> stmfd sp!,{r0-r12,lr}
>
> ldr r0,=ioclr0
>
> ........
> ENDP
>
> But I received error SYNTAX ERROR on AREA line.:(
> What is the problem?
> I really need help!
>
(You need to be a member of lpc2000 -- send a blank email to lpc2000-subscribe@yahoogroups.com )
AREA ?PR?RAMFunc, "ERAM"
This should work.
By the way...why don't you use the __ram directive, (and code your
function in C...you can still use in-line assembly if you want...)
that Keil gives you? This is far easier to do, and works very well!
Ken Wada
--- In l...@yahoogroups.com, "beastkiki"
>
> Hi all,
> I use Keil uVision 3 with LPC2212.
> I must write one function in assembler and execute it from internal
> RAM on LPC2212.
> How can I do that?
>
> I am trying:
> AREA ?PR?RAMFunc, ERAM
> RSEG ?PR?RAMFunc
>
> PUBLIC RAMFunc?A
> PUBLIC RAMFunc?T
> ; veneer code for Thumb entry
> RAMFunc?T PROC CODE16
> bx r15
> nop
> ENDP
>
> RAMFunc?A PROC CODE32
>
> stmfd sp!,{r0-r12,lr}
>
> ldr r0,=ioclr0
>
> ........
> ENDP
>
> But I received error SYNTAX ERROR on AREA line.:(
> What is the problem?
> I really need help!
>
(You need to be a member of lpc2000 -- send a blank email to lpc2000-subscribe@yahoogroups.com )