PIC18F66K22 EEPROM Functions

[mayur.k.vadukul]

I am writing a code whereby I need more than 256 bytes of data to store.
I have checked the datasheet and it suggests the PIC18F66K22 has 1024 Bytes of storage.
However, when I am using the library function write_eeprom, it does not write beyond 256 bytes and starts overriding it.

i.e. if I write ADD = 10, Data = 56; write_eeprom (ADD,DATA), it works fine. But if I try to write at the address 300 with Data = 56, it changes the data of address (300-256).

PS: I have also changed the header file section as below:-

[temtronic]

I don't have that PIC, never used the write_eeprom()...
but
since your PIC has 1024 bytes of storage, I'd always use unsigned int16 for the address.
It may be 'something' in the library has defaulted to 8 bit.
Maybe your code uses the same variable name and it's 8 bit ?

I don't know but pretty sure someone who has used this will reply soon !

[mayur.k.vadukul]

The problem is solved now.

The issue was that the variable I used was 16 bit unsigned integer, but the offset which was passed to obtain the storage address was unsigned 8 bit integer.

I was storing from offset 119 to 329. However, when the counter went beyond 255, it turned 0.

i.e. unsigned 16 bit int a = offset (119) + required location (this was unsigned 8 bit integer);

The above should work technically as the stored variable is larger in size but it didn't work. But once I made the variable which was passed into the loop as unsigned 16 bit integer as well, it started working correctly.
_________________
MVadukul

[temtronic]

whew you FOUND it ! great !!!

sometimes little problems can cause BIG headaches.

[Ttelmah]

Classic.

Well done finding it. Flag the thread as solved please.