Re: Some forward movement on Virtual Serial Host

[fx <sfxman@gmail.com>]

On Sunday, January 6, 2013 10:17:06 PM UTC-5, Kevin wrote:
> On Sunday, January 6, 2013 6:33:46 PM UTC-6, fx wrote:
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> > On Sunday, January 6, 2013 1:58:45 PM UTC-5, Kevin wrote:
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> > > On Sunday, January 6, 2013 11:13:03 AM UTC-6, Riccardo wrote:
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> > > > Whiteout forgetting ADTPro date/time getting function. About it, you could put an date/time IC in your PCB to interfacing with AVR ;)
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> > > > Riccardo.
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> > > I have a rtc (realtime clock) the problem with it is all the cheap ones are i2c interface, which is a pig of a io and is using too much ram atm.
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> > Hey, this is a very cool project! I will have to try this out.
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> > Regarding the RTC, the ATMega328 does have a hardware i2c interface. You don't need to waste a lot of time waiting IO. Your code can do other stuff while you're waiting for the i2c slave to respond.
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> yea I know, its not a matter of time, its a matter of memory, after I start up a sd card, fat file system, buffers and all that goes with it I have about 600 bytes of ram free. 
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> starting up a generic i2c library blows that up, so I either need to go in and trim out all the fat, or use a non i2c clock, which for whatever reason knocks up the price (from 1 to 3$) 
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> course a goal of making these things in some quantity is to keep the cost as low as possible

Wow, I had no idea the i2c library needed that much RAM. Did you try the one that comes with Arduino or were you using one you downloaded? I'd like to try this myself and see what's going on. Thanks.