Need a lil helping hand on accessing the EEPROM on a ST6260

[jnievelstein9]

Posted on March 16, 2004 at 04:39

Need a lil helping hand on accessing the EEPROM on a ST6260

[jnievelstein9]

Posted on March 15, 2004 at 10:50

Hier a lil routine that works propper on the Epromversion

of the ST6260B.

The same routine does not work on the OTA version of

the 6260C.

Please, I am happy for any hint.

setAD LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,setAD ;

LDI EECTL,00h ;

doAD LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,doAD ;

LDI DRBR,00000001b ;

LD A,SData ;

ANDI A,00001111b ;

SET E2ENA,EECTL ;

doAD1 LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,doAD1 ;

LD EEDat,A ;

goonAD LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,goonAD ;

RES E2ENA,EECTL ;

getAD LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,getAD ;

LDI DRBR,00000001b ;

LDI EECTL,00h ;

getAD0 LDI DWDR,0FFh ;

JRS E2BUSY,EECTL,getAD0 ;

LD A,EEDat ;

ANDI A,00001111b ;

LD EAdress,A ;

SET E2off,EECTL ;

RET ;

Note: EEDat = 10h

greetinx

Joker

[ This message was edited by: JRN-Joker on 15-03-2004 15:23 ]

[afabilli9]

Posted on March 16, 2004 at 04:39

hi, sorry for bad english

not use set o res in to route for read or write e2prom, but use only LDI eectl,xx

This route work very well on the ST62E65C, first use this route disable all interrupts

rde2p ld a,e2p_id ;adress e2prom

ld x,a

ldi xcount,8

ldi y,dato0 ;adress ram when save the buytes read

ldi drbr,01h ;Select the EEPROM page 0

ldi eectl,00h ;Enable the EEPROM

rde2p1 ldi wdr,0ffh

jrs 1,eectl,$

ld a,(x)

ld (y),a

inc x

inc y

dec xcount

jrnz rde2p1

ldi wdr,0ffh

ldi eectl,40h ;Disable the EEPROM (Low comsuption)

ret

wre2p ld a,e2p_id ;adress e2prom

ld x,a ;adress -> X

ldi xcount,8 ;number byte to save

ldi y,dato0 ;adress ram byte to save

ldi drbr,01h ;Select the EEPROM page 0

ldi eectl,05h ;Enable EEPROM parallel writing mode

ldi wdr,0ffh

jrs 1,eectl,$ ;check that e2pron not busy

wre2p1 ld a,(y)

ld (x),a

inc x

inc y

dec xcount ;decrement counter

jrz wre2p2

jp wre2p1

wre2p2 ldi wdr,0ffh

ldi eectl,0dh ;Start parallel writing (5ms typical)

jrs 1,eectl,$ ;wait end procedure

ldi eectl,40h ;Disable the EEPROM (Low comsuption)

ldi wdr,0ffh

ret