12f629 Eeprom

[BGreen]

I have never used EEPROM before and am confusing the **** out of myself reading the data sheet. All I'm trying to do is save and read a couple of variables. One will range from 0-6 while th other would be a 0 or 1. If anyone has a simple code example I would really appriciate the help.

[mister_e]

There's many ways, but assuming the PBP statements and you want to do it at run-time without having default value in the EEPROM, you need to use WRITE and READ.

[BGreen]

Steve that was what I was trying with Write address, value. Maybe I'm confusing myself with the address. On page 49 of the data sheet it also gave a list of requirements and I was getting syntax errors. What I'm trying to do is increment a value using a button and write it to EEPROM and be able to read it.

[mister_e]

O.K. the 12F629 have 128 bytes of EEPROM, so the address range is between 0 and 127. PBP WRITE handle the PIC address for you.

try this

<font color="#000000">        <font color="#008000">'
        '       Pic Configuration
        '       =================
        </font>@ __CONFIG _INTRC_OSC_NOCLKOUT &amp; _WDT_ON &amp; _PWRTE_ON &amp; _MCLRE_OFF &amp; _BODEN_ON        
        
        <font color="#008000">'
        '       Hardware configuration
        '       ======================
                '
                '       I/Os
                '       ----
                </font>TRISIO = %11111110  <font color="#008000">' GP0 As output, others TO input
                
                '
                '       Comparator
                '       ----------
                </font>CMCON = 7           <font color="#008000">' Disable comparator      
        
        '                      
        '       Hardware assignment
        '       ===================
                '
                '       User control
                '       ------------
                </font>PB1     <font color="#000080">VAR </font>GPIO.1
                LED     <font color="#000080">VAR </font>GPIO.0

        <font color="#008000">'   
        '       Software variables
        '       ==================
        </font>AddressCounter  <font color="#000080">VAR BYTE

        </font><font color="#008000">'
        '       Software/Hardware initialisation
        '       ================================
        </font>AddressCounter = 0
        LED = 0
        <font color="#000080">PAUSE </font>100   <font color="#008000">' osc settle time
        
                
        '------------------------------&lt; Main program &gt;-----------------------------------
        '
</font>Start:
        <font color="#000080">WHILE </font>AddressCounter!=128
            <font color="#000080">IF </font>PB1 = 1 <font color="#000080">THEN     
                WRITE </font>AddressCounter,AddressCounter
                LED = 1        
                <font color="#000080">WHILE </font>PB1 : <font color="#000080">WEND
                PAUSE </font>100
                LED = 0
                AddressCounter = AddressCounter + 1
                <font color="#000080">ENDIF
            WEND
        </font>LED = 1

SpinHere:   
        <font color="#000080">GOTO </font>SpinHere        
        <font color="#008000">'
        '---------------------------------------------------------------------------------
</font>

Each time you'll press on the push-button attach to gpio.1, it will write to the EEPROM. Once the EEPROM is full, the LED will stay ON.

Once done, if i read the pic, the EEPROM show...
<IMG SRC="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=1609&stc=1&d=117864751 5">

Sucessfull!

[BGreen]

Thank you Steve. Let me see where I can go from here.

[BGreen]

Thanks again Steve. It was the address that had me confused and your example cleared it up for me.

Butch