Lpc2000

Mark,

Thank you very much. I appreciate your help.
It's a good explanation and starting point for IAP stuff.

Regards 



--- In lpc2000@yahoogroups.com, "Mark Butcher" <M_J_Butcher@I...>
wrote:
> Hi IAP is very easy on the LPC21xx
> 
> Here's an example of how to erase sectors:
>                                     
> 
> /********************************************************/
> 
> #define IAP_LOCATION 0x7ffffff1
> 
> #define CMD_SUCCESS  0
> 
> #define FLASH_PREPARE_SECTOR_TO_WRITE     50
> #define FLASH_ERASE_SECTORS               52
> 
> typedef void (*IAP)(unsigned long [], unsigned long []);
> 
> int fnEraseSectors(unsigned char SectorStart, unsigned char 
> SectorEnd, unsigned long ulProcFrequency)
> {
>   unsigned long command[5];
>   unsigned long result[2]; 
>   IAP iap_entry = (IAP) IAP_LOCATION;
> 
>  __disable_interrupt();
> 
>  command[0] = FLASH_PREPARE_SECTOR_TO_WRITE;
>  command[1] = SectorStart;
>  command[2] = SectorEnd;
>  command[3] = ulProcFrequency;
> 
>  iap_entry(command, result);
> 
>  if (CMD_SUCCESS == *result) {
>    command[0] = FLASH_ERASE_SECTORS;
>    iap_entry(command, result);
>  }
>  __enable_interrupt(); 
> 
>   return (CMD_SUCCESS == *result);
> }
> 
> Notes:
> 1. when the IAP routine is called, the processor switches 
> automatically to thumb instruction set since the address is odd.
> 2. Here interrupts are disabled during the IAP calls. since the 
> FLASH can not be used during IAP processing. If interrupts are 
> required to be serviced during IAP, the interrupt routines must be 
> in RAM.
> 3. Note that the present operating frequency has be be passed as a 
> parameter to ensure that the deletion or programming is performed 
> correctly. By using a variable the routine can be used even when
the 
> PLL is varied (eg. switching between full speed and slower 
> operation).
> 4. Commands and details about error codes which can be returned are 
> all in the LPC21xx data sheet.
> 
> Regards
> 
> Mark Butcher
> 
> www.mjbc.ch
> 
> 
> 
> 
> --- In lpc2000@yahoogroups.com, "r_bottleneck" <r_bottleneck@y...> 
> wrote:
> > Hi,
> > 
> > Does anybody know a source where to find a IAP program example ?
> > 
> > I'm not yet familiar with the LPC21xx family and I would like to 
> > use that feature in a new project.
> > 
> > Thank you for any hint.