EEPARAM is in bank2?
You don't have to enable interrupts since the interrupts flags are set
regardless of the interrupt state (on/off).
BTW what PIC are we talking about?

MIRCEA CHIRICIUC
EMCO INVEST

----- Original Message -----
From: "Pic Dude" <picdude@AVN-TECH.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, June 07, 2002 7:29 AM
Subject: [PIC]: EEPROM write woes


> This is why I'm bald... been ripping my hair out trying
> to figure out this problem.  At first, I was not waiting
> for EEIF to be set and noticed that data was not getting
> written to the EEPROM.  Then, I added the 3 lines to wait
> on EEIF set and get an odd result -- when the routine
> gets called, it works some times and other times it hangs
> -- the code just freezes.  (No WDT btw).
>
> I've checked (prior to waiting on EEIF) with the simulator
> and it works there.  Also verified that it's getting the
> right values for the data and location.  The way I see it,
> no matter what is passed in, this routine should work,
> right?  It should not hang.  And most of the routine is
> from the datasheet.
>
> I do have TMR0 interrupts occuring, but that should not
> hang this routine, should it?  Yes, I do save and restore
> W & STATUS in the ISR.
>
> Anyone have clues as to what may be happening?
>
> Cheers,
> -Neil.
>
>
>         ;------------------------------------------------------
>         ; Write data (in EEPARAM) to EEPROM location (in W)
>         ;------------------------------------------------------
> SetEEData:
>         bsf     STATUS,RP1      ; Bank 2
>         bcf     STATUS,RP0      ; Bank 2
>
>         movwf   EEADR
>         movf    EEPARAM,W       ; Data to be stored
>         movwf   EEDATA
>         bsf     STATUS,RP0      ; Bank 3
>         bcf     EECON1,EEPGD    ; Point to data memory
>         bsf     EECON1,WREN     ; Enable writes
>         bcf     INTCON,GIE      ; Disable interrupts (if enabled)
>         movlw   H'55'           ; Special seq
>         movwf   EECON2          ; ...
>         movlw   H'AA'           ; ...
>         movwf   EECON2          ; ...
>         bsf     EECON1,WR       ; Start write operation
>         bsf     INTCON,GIE      ; Enable interrupts (only if being used)
>         bcf     EECON1,WREN     ; Disable writes
>
>         bcf     STATUS,RP1      ; Reset to bank 0
>         bcf     STATUS,RP0      ;
>
> WaitEEWriteComplete:
>         btfss   PIR2,EEIF
>         goto    WaitEEWriteComplete
>
>         return
>
> --
> http://www.piclist.com hint: The list server can filter out subtopics
> (like ads or off topics) for you. See http://www.piclist.com/#topics
>
>
>

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics