Lpc2000

>Hi all, I'm just starting to work with the In Application 
>Programming and I was wondering if anyone has some simple c code 
>that stores some calibration variables into flash.  Thanks,
>

Here it is:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Setup strucure defined in RAM

struct SETUP {
    ... // fill in the gaps with your data
};

One copy of the structure in RAM

struct SETUP setup;

Pointer to the non volatile copy

struct SETUP * nonvolatile;

nonvolatile= (struct SETUP*) 0x1C000; // Points to page 14 in Flash 
(LPC2106)

copy to RAM (if you need)

setup=*nonvolatile;

now modify it as you need

Then save it - this is for a 14.745 MHz Xtal

#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); // I do this just for a laugh
   // 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);     // erase the block - else you get old 
+ new data mixed !!!
   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");
}


It works well be me. make your your program doesn't get up to page 14 of 
Flash !!!!


Owen Mooney