Michael Gois wrote :

> Hi
> I have followed the instructions for writing to the internal EEPROM
> throroughly - I tried copying the code from the PIC datasheet, have
> tried code I found on piclist, but I cannot get a successful
> result. My code I use to read and write is at the end of the message.

Ji.
I think you have banking troubles, see comments in the code...

Regards
Jan-Erik.


> EEPROM_WRITE_TEST
>         bsf STATUS,RP1          ; Bank 2
>         bcf STATUS,RP0          ;

- We are in bank 2 now !!

>         movlw 0x00                      ; Address to write to
>         movwf EEADR                     ; Move into EEPROM address reg
>         movlw 0xAA                      ; Some test data
>         movwf EEDATA            ; Save data to write

- Still in bank 2 !!

>         call EEPROM_WRITE               ; Write to EEPROM
>         bcf STATUS,RP1

- Maybe this "bcf" should be before the "call" ?
-
>         return
>
>
> EEPROM_WRITE
>         bcf PIR2,EEIF           ; Clear any previous EEPROM interrupt

- PRI2 is in bank 0 *but* we are still in bank 2 !!
- You are actualy clearing a bit in EEADR, I think...

The rest doesn't matter much... :-) :-)

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