AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Don Kinzer" <dkinzer@e...> wrote:
>
> --- In AVR-Chat@yahoogroups.com, "filipesbp" <filipesbp@s...> 
wrote:
> > I'm trying to make a project that needs to store the 
configuration 
> > when the power is off. I'm a C programmer (I use Avredit), and 
the 
> > only thing that i can find in Google is store e a external EPROM 
and 
> > the code is in assembly.
> > Can some one tell me how can i do this in c? 
> 
> You can store data in the internal EEPROM.  You can even store 
data in 
> internal flash.  Both memories, however, have write cycle 
limitations; 
> something on the order of 100,000 writes is the guaranteed 
minimum.  
> Consult the datasheet for the particulars.
> 
> The details of how you read and write EEPROM and flash depend on 
what 
> compiler you're using.  It is very likely that there are library 
> routines, provided with the compiler that you're using, 
specifically 
> for these purposes.  With WinAVR, there is a series of functions, 
all 
> beginning with the prefix eeprom_ for reading and writing.  
Similarly, 
> there is a series of functions for reading/writing flash memory.  
> Consult the documentation for your compiler or post a question on 
the 
> message board for your compiler.
> 
> Of course, you can always drop down to assembly language.  This is 
> especially easy if your compiler supports in-line assembly code.  
If 
> not, it probably supports separately compiled/assembled object 
modules 
> so you could still use the assembly language code and design a C-
> language interface to the routines.
> 
> Don
> ZBasic Microcontrollers
> http://www.zbasic.net
>

Now i'm confused, what's the difference between EPROM and FLASH?
FLASH is used for to store the program, and EPROM is used for data, 
is that correct?
If I need to store a string of 9 bytes (configuration), what is 
better to use?