PIC16F677 and READ/WRITE

[LinkMTech]

I guess this was a tough one and don't feel so bad now. After researching and more searching it became obvious.
Even though the PIC16F677 has 256 bytes of EEPROM availble but I can't use it because it seems the compiler is trying to use EEPGD that is only used in the rest of the series... Don't use it!
The PIC16F685, 687, 689 & 690 are only around $0.25 more. Problem solved.

[LinkMTech]

Well as it turns out, just avoiding the problem did not solve it.
The PIC16F685 does not provide the SSP hardware I'll be needing now so more searching found Darrel's guidance (thanks again Darrel!) http://www.picbasic.co.uk/forum/showthread.php?t=12424
So comparing both INC files shows that the PIC16F677 was missing the EEPGD in the BANK 3 Register:

portion of PIC16F685 INC file:

;----- BANK 3 REGISTER DEFINITIONS ----------------------------------------
;----- EECON1 -------------------------------------------------------------

EEPGD                        EQU     H'0007'
WRERR                        EQU     H'0003'
WREN                         EQU     H'0002'
WR                           EQU     H'0001'
RD                           EQU     H'0000'

same section of PIC16F677 INC file:

;----- BANK 3 REGISTER DEFINITIONS ----------------------------------------
;----- EECON1 -------------------------------------------------------------

WRERR                        EQU     H'0003'
WREN                         EQU     H'0002'
WR                           EQU     H'0001'
RD                           EQU     H'0000'

Updated to:

;----- BANK 3 REGISTER DEFINITIONS ----------------------------------------
;----- EECON1 -------------------------------------------------------------

EEPGD                        EQU     H'0007' ; Added 11/8/2010
WRERR                        EQU     H'0003'
WREN                         EQU     H'0002'
WR                           EQU     H'0001'
RD                           EQU     H'0000'

Compiled without errors and I can now use the EEPROM in the PIC16F677!

A big Thank You! to all who contribute their expertise and time to help others along.

[Darrel Taylor]

Hi Louie,

I'm glad you got it working, although I'm not sure how my other post helped.

Would it help if I mentioned that 2.47 was the first time that family was included in PBP.
And the 677 EEPROM issue was fixed in PBP version 2.50?

OK, probably not ...
________________
DT

[LinkMTech]

Would it help if I mentioned that 2.47 was the first time that family was included in PBP.
And the 677 EEPROM issue was fixed in PBP version 2.50?

Actually it does...
It confirms I need to stop dragging my feet and dig out my receipt for Bruce so I can update!