Re: [avr-gcc-list] Placing constants at known locations in eeprom at compile time

[David Breeze]

Thanks for the tip.

David.

>>> Klaus Rudolph <address@hidden> 30 May 2003 07:08:06 >>>
Hi David,


> 
> I have a requirement to place constants in the EEPROM of an ATmega323 in 
> known locations at compile time.

I use the following code in my project:


<code>
//******************************************************************
//* EEProm Positionen                                              *
//******************************************************************
.section .eeprom

CONTROLLER_ID_LOW:
.byte 0x80      ;defaultadresse
CONTROLLER_ID_HIGH:
.byte 0x40      ;defaultadresse 

//now we need a gap, so that all!!! informations stand whitin one page!
//of the eeprom!
.rept 64-2
.byte 0x00
.endr


#define DAUERANDGROUP_LEN 8*ANZ_BANK
DAUERANDGROUP0:
.rept ANZ_BANK
.rept 4
.byte 0x30+0x02, 0x00           ;dauer Bit7..3, Gruppe Bit2..0 (3Bit)
.endr
.endr
<\endcode>


It make no difference between writing data to flash than
to eeprom. Only difference is to use the .eeprom section here.

Hope that helps

Bye
        Klaus

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