I need to store my boards network ID into nonvolatile memory. I have been using the page_erase() and write_flash_chk():



page_erase(PAGE_START, 0xFF, FDM);
write_flash_chk(PAGE_START, NewAddr, FDM);



where
PAGE_START = 0x0400
and my timing is set up as


//FLASH WRITE CONFIGURATION
USEC = 0x0C; //tFWT = 32.5 us
MSECH = 0x4E; //MSEC for tFET = 10 ms
MSECL = 0x20; // @32 MHz
FTCON = 0xFF; //FWR = 0x0F & FER = 0x0F


That worked fine until I changed my Serial ISR to implement a ring buffer, which has nothing to do with my memory writing function.

I know it is diffucult to debug a problem without seeing the code, but can anyone suggest things to look out for or a better way to store variables in flash memory?

Thanks