Internal eeprom - erase block

[sayzer]

What this is saying is that the first 4k locations are 'high endurance' (and probably physically larger). The remaining 28k bytes are 'standard endurance'.

Just make sure your code always starts to store data from address 0 so the low adfdresses get most writes and the highest see less writes.

HTH
Brian

Hi Brian,


What it says is clear.

The thing is, for standard block, it says 1M cycle at the beginning, but 100K cycle at the end of the statement. Read it again!



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[ria_river]

Hi everyone!

I'm using PIC16f877a and I program it this way:

'PIC DEFINES
'--------------------
@ DEVICE pic16f877a, XT_OSC
@ DEVICE pic16f877a, WDT_ON
@ DEVICE pic16f877a, PWRT_ON
@ DEVICE pic16f877a, BOD_ON
@ DEVICE pic16f877a, LVP_OFF
@ DEVICE pic16f877a, CPD_OFF
@ DEVICE pic16f877a, PROTECT_OFF
@ DEVICE pic16f877a, WRT_OFF

'LCD DISPLAY
'--------------------
DEFINE LCD_DREG PORTA
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTA
DEFINE LCD_RSBIT 4
DEFINE LCD_EREG PORTE
DEFINE LCD_EBIT 2
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
'DEFINE LCD_COMMANDUS 2000
'DEFINE LCD_DATAUS 50

ADCON1=7

prnt var byte[2]

TRISB=%00000000
TRISC=%00000000
TRISD=%00000001
CMCON=%00000111
'CVRCON=%0000000
OPTION_REG.7=0

EEPROM 0,[1]
EEPROM 1,[8]

lcdout $fe,1,"Reading eeprom"
read 0,prnt[0]
read 1,prnt[1]
lcdout $fe,1,"Reading=",#prnt[0],#prnt[1]

end

When I load the hex file I can see the values 1 and 8 stored in eeprom address 0 and 1 respectively.My problem is that it can't read those values. the lcd will just display "Reading=00".Please help me

[skimask]

Try this for grins, same thing but different...

loc0 var byte
loc1 var byte
.................
write 0,1
write 1,8
lcdout $fe,1,"Reading eeprom"
read 0,loc0
read 1,loc1
lcdout $fe,1,"Reading=",DEC loc0,DEC loc1
end

Should say "Reading=18" when it's run.

[ria_river]

I also got problem writing the eeprom. I program it this way:

lcdout $fe,1,"writing the eeprom"

write 0,2
write 1,3
pause 2000

lcdout $fe,1,"Successful!"

end

The output is terrible.It will just make the lcd display "writing the eeprom" and it will keep on refreshing...
Please help me...

[mister_e]

Use a STOP or an endless loop before the END statement.

        pause 2000
        lcdout $fe,1,"Successful!"
Here:   GOTO Here 
end

[ria_river]

Thanks steve.
I'll try this.

[ria_river]

Hi Steve!

I placed an endless loop before the END, but still i got the same output.
What should I do?
Please help...