Lpc2000

Hello all,

I recently purchased an Olimex LPC - H2294 board with 1MB External
SRAM and 4 MB External Flash.

I have the following problem :

I can't access to the External SRAM memory to write or read into it.

I know that the start addresses of both SRAM are :

Internal SRAM       0x40000000
External SRAM       0x81000000

I know that I have to set the EMC controller but I don't know how.

I would like to know if somebody know how to do this.

I would like to do the same application as below with :

SRAM_BASE     0x81000000    

instead of

SRAM_BASE     0x40000040

I am using the Rowley CrossStudio Evaluation version, I wrote the
following program and it works well in the Internal 16K SRAM of the
LPC2294.

The following code do :

pointer address initialisation

copy integers from 0 to 15 in the internal SRAM

do the sum of these integers and copy this value to the pointer result.

/*

    LPC2294 Internal 16K SRAM Testing

*/

#include <targets/lpc22xx.h>

#define     SRAM_BASE     0x40000040
#define     RESULT        0x400000A0

int *sramIptr = (int *)SRAM_BASE;
int *result   = (int *)RESULT;

int main(void){

  int i;
  int sum = 0;

  sramIptr = (int *)SRAM_BASE;

  for(i = 0; i < 16; i++){
    
    *sramIptr++ = i;

  }

  sramIptr = (int *)SRAM_BASE;

  for(i = 0; i < 16; i++){
    
    sum += *sramIptr++;

  }

  result   = (int *)RESULT;

  *result = (int)sum;

  while(1);

  return 0;
}

Go to www.sparkfun.com, click on the 2294 and there is a demo
(includes source code) that shows read/write external flash,
read/write external ram.

Sonny


--- In lpc2000@yahoogroups.com, "lpc_2294" <lpc_2294@y...> wrote:

> 
> Hello all,
> 
> I recently purchased an Olimex LPC - H2294 board with 1MB External
> SRAM and 4 MB External Flash.
> 
> I have the following problem :
> 
> I can't access to the External SRAM memory to write or read into it.
> 
> I know that the start addresses of both SRAM are :
> 
> Internal SRAM       0x40000000
> External SRAM       0x81000000
> 
> I know that I have to set the EMC controller but I don't know how.
> 
> I would like to know if somebody know how to do this.
> 
> I would like to do the same application as below with :
> 
> SRAM_BASE     0x81000000    
> 
> instead of
> 
> SRAM_BASE     0x40000040
> 
> I am using the Rowley CrossStudio Evaluation version, I wrote the
> following program and it works well in the Internal 16K SRAM of the
> LPC2294.
> 
> The following code do :
> 
> pointer address initialisation
> 
> copy integers from 0 to 15 in the internal SRAM
> 
> do the sum of these integers and copy this value to the pointer result.
> 
> /*
> 
>     LPC2294 Internal 16K SRAM Testing
> 
> */
> 
> #include <targets/lpc22xx.h>
> 
> #define     SRAM_BASE     0x40000040
> #define     RESULT        0x400000A0
> 
> int *sramIptr = (int *)SRAM_BASE;
> int *result   = (int *)RESULT;
> 
> int main(void){
> 
>   int i;
>   int sum = 0;
> 
>   sramIptr = (int *)SRAM_BASE;
> 
>   for(i = 0; i < 16; i++){
>     
>     *sramIptr++ = i;
> 
>   }
> 
>   sramIptr = (int *)SRAM_BASE;
> 
>   for(i = 0; i < 16; i++){
>     
>     sum += *sramIptr++;
> 
>   }
> 
>   result   = (int *)RESULT;
> 
>   *result = (int)sum;
> 
>   while(1);
> 
>   return 0;
> }

Hello all,

Sonny, thanks for the hint.

I tried to start the project and IAR doesn't recognize it at a valid
project.

I created a new project with IAR and I took care to include all the
files of the project (*.c and *.h) at the root of the new project.

I got 100 errors and 33 warnings, when I was looking into the files, I
saw many definition in the main.c that were nowhere in the files (*.c
and *.h) involved in the project.

I found weird the fact that 2114 files are necessary for a 2294.

Does anybody successfuly compiled this project ?


--- In lpc2000@yahoogroups.com, "sonny945852001" <icruz@s...> wrote:
> Go to www.sparkfun.com, click on the 2294 and there is a demo
> (includes source code) that shows read/write external flash,
> read/write external ram.
> 
> Sonny
> 
> 
> --- In lpc2000@yahoogroups.com, "lpc_2294" <lpc_2294@y...> wrote:
> > 
> > Hello all,
> > 
> > I recently purchased an Olimex LPC - H2294 board with 1MB External
> > SRAM and 4 MB External Flash.
> > 
> > I have the following problem :
> > 
> > I can't access to the External SRAM memory to write or read into it.
> > 
> > I know that the start addresses of both SRAM are :
> > 
> > Internal SRAM       0x40000000
> > External SRAM       0x81000000
> > 
> > I know that I have to set the EMC controller but I don't know how.
> > 
> > I would like to know if somebody know how to do this.
> > 
> > I would like to do the same application as below with :
> > 
> > SRAM_BASE     0x81000000    
> > 
> > instead of
> > 
> > SRAM_BASE     0x40000040
> > 
> > I am using the Rowley CrossStudio Evaluation version, I wrote the
> > following program and it works well in the Internal 16K SRAM of the
> > LPC2294.
> > 
> > The following code do :
> > 
> > pointer address initialisation
> > 
> > copy integers from 0 to 15 in the internal SRAM
> > 
> > do the sum of these integers and copy this value to the pointer
result.

> > 
> > /*
> > 
> >     LPC2294 Internal 16K SRAM Testing
> > 
> > */
> > 
> > #include <targets/lpc22xx.h>
> > 
> > #define     SRAM_BASE     0x40000040
> > #define     RESULT        0x400000A0
> > 
> > int *sramIptr = (int *)SRAM_BASE;
> > int *result   = (int *)RESULT;
> > 
> > int main(void){
> > 
> >   int i;
> >   int sum = 0;
> > 
> >   sramIptr = (int *)SRAM_BASE;
> > 
> >   for(i = 0; i < 16; i++){
> >     
> >     *sramIptr++ = i;
> > 
> >   }
> > 
> >   sramIptr = (int *)SRAM_BASE;
> > 
> >   for(i = 0; i < 16; i++){
> >     
> >     sum += *sramIptr++;
> > 
> >   }
> > 
> >   result   = (int *)RESULT;
> > 
> >   *result = (int)sum;
> > 
> >   while(1);
> > 
> >   return 0;
> > }