Lpc2000

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;
> }