Re: [Simulavr-devel] eeprom support

[eban]

Wow, that was fast and everything seems to be working
fine!!!

I saw that you had already programmed the same things
that were missing for the flash memory, but thought
that there were still many "obscure and difficult"
things to do.

The type of external eeprom that I would like to
simulate is an i2c 24LC*. I attach an image of how
it's connected. I hope nobody gets upset because of
this attachment.

I know it's a little bit difficult to do, but it's ok.
I don't really need it for now.

Thanks a lot,
  Alberto Escalante

--- Jason Kyle <address@hidden> wrote:
> At 12:17 1/10/2002, Theodore A. Roth wrote:
> >Hi Alberto,
> >
> >On Mon, 30 Sep 2002, eban wrote:
> >
> >:) Hello everybody!,
> >:)
> >:) I'm trying to simulate a program that uses the
> >:) internal eeprom and a external eeprom.
> >:) At least I really need to use the internal
> eeprom.
> >:)
> >:) Simulavr has most of the work done to allow
> this, but
> >:) i don't think there's a way to load my binary
> eeprom
> >:) images yet.
> >:)
> >:) Is there a way to do this?
> >
> >Yes.
> >
> >:) How much work is needed?
> >
> >Oh, about 45 minutes worth. ;-)
> 
> Far too quick, must be riddled with bugs!  Only
> hello world can be written 
> in 45min :)
> 
> 
> >:) Is anybody working on this?
> >
> >Not any more. I just checked it in to cvs.
> >
> >The -e <file> option now works for binary files.
> You can generate the
> >eeprom binary image as such:
> >
> >   $ avr-objdump -j .eeprom -O bin foo.elf >
> foo.bin
> >
> >and then use "-e foo.bin" to get the file into
> eeprom.
> >
> >:) What about the external eeprom?
> 
> This really falls into the category of external
> periperals, much like a 
> dataflash memory would.  Can't see any really good
> reason for hooking up an 
> EEPROM to an AVR's external SRAM interface, perhaps
> you are meaning an SPI 
> or IIC bus EEPROM?
> 
> 
> >Well, that's a bit more difficult.
> >
> >I'm assuming you are talking about memory mapping
> and eeprom device into
> >the external sram space of the device. As far as I
> know, the AVR's don't
> >have built-in support for external eeprom.
> >
> >Simulavr needs some serious work before could have
> this. :-\ It's on the
> >TODO list, but I'm a bit busy with some other stuff
> right now. Feel free
> >to dig into if you like. I'll help however I can.
> 
> Would be cool to have an external periperal
> simulation interface, although 
> i'm sure it's been on your mind for simulavr's
> entire life it does 
> represent lots of work....  At your leisure :)
> 
> Cheers,
> 
> Jason Kyle
> 
> 
> 
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>
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