Lpc2000

Hi Owen,

Yes, this helps a lot.
Thank you!

Martin

--- In lpc2000@yahoogroups.com, Owen Mooney <ojm@s...> wrote:
> Yes I have. Its easy, but you have to use up a whole page (unless
you read - modify - write) I had lots of spare flash and was typically
saving a configuration just a few times so these limitations didn't
matter.
> 
> Code using IAP instructions below.
> 
> Accessing the stored structure is just a direct memory access.
> 
> The write cycle limitations have been well documented by those
willing to offer an opinion but not answer your question !!!
> 
> Owen Mooney
> 
> #define IAP_LOCATION 0x7ffffff1
> 
> void savesetup(struct SETUP *setup){
>    typedef void (*IAP)(unsigned int [],unsigned int[]);
>    unsigned int command[5];
>    unsigned int result[2];
>    IAP iap_entry;
>    __ARMLIB_disableIRQ();
>    iap_entry=(IAP) IAP_LOCATION;
>    // get part ID
>    command[0]=54;
>    result[0]=0;
>    iap_entry(command, result);
>    // result in result[1] 
>    // prepare to erase
>    command[0]=50;
>    command[1]=14;
>    command[2]=14;
>    iap_entry(command, result);
>    if (result[0] != 0) goto error;
>    // erase
>    command[0]=52;
>    command[1]=14;
>    command[2]=14;
>    command[3]=14745;
>    iap_entry(command, result);
>    if (result[0] != 0) goto error;
>    // prepare to program
>    iap_entry=(IAP) IAP_LOCATION;
>    command[0]=50;
>    command[1]=14;
>    command[2]=14;
>    iap_entry(command, result);
>    if (result[0] != 0) goto error;
>    //  program
>    command[0]=51;
>    command[1]=0x1C000;
>    command[2]=(int)setup;
>    command[3]=512;
>    command[4]=14745;
>    iap_entry(command, result);
>    if (result[0] != 0) goto error;
>    __ARMLIB_enableIRQ();
>    return;
>    error:
>    __ARMLIB_enableIRQ();
>    printf("bum");
> }
> 
> 
> Hi!
> 
> Has someone used the flash memory of the lpc21xx for eeprom purposes?
> Or is it more usefull to take an additive eeprom to the design? I only
> want to store some parameters.
> 
> Thank you for feedback!
> Martin
> 
> 
> 
> 
> 
> ____________