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SD MMC CARDS

 
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matt_edwards

Bascom Member



Joined: 14 Apr 2004
Posts: 2
Location: Baulkham Hills, Australia

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PostPosted: Tue Jul 27, 2004 11:26 pm    Post subject: SD MMC CARDS Reply with quote

Just a quick review of who, if anyone is working on SD or MMC card memory storage.

I am about to embark on a project and would like to share ideas.Very Happy

And no I don't want to us CF cards.Wink

Matthew
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albertsm

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Joined: 09 Apr 2004
Posts: 5319
Location: Holland

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PostPosted: Tue Aug 03, 2004 11:00 pm    Post subject: Reply with quote

Hi,

I have used them in a project with AVR-DOS.
Works perfect. But SD is slower then CF.

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Mark
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oe9vfj

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Joined: 17 Jun 2004
Posts: 269
Location: Austria, Hard

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PostPosted: Thu Aug 05, 2004 12:43 pm    Post subject: Reply with quote

Hi,

You can find more info about AVR-DOS on
http://members.aon.at/voegel

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regards Josef

DOS - File System for BASCOM-AVR on http://members.aon.at/voegel
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matt_edwards

Bascom Member



Joined: 14 Apr 2004
Posts: 2
Location: Baulkham Hills, Australia

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PostPosted: Wed Aug 11, 2004 1:48 pm    Post subject: Reply with quote

Guys thanx for the replies. I know the CF will be a lot faster, But SD are far more efficent on pins!

I also gather that the dov lib requires a big chip.
Any thoughts on size I have Mega32s and want to have some Io and RTC.

Remembering I want make a basic data loger.

Matthew
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oe9vfj

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Joined: 17 Jun 2004
Posts: 269
Location: Austria, Hard

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PostPosted: Wed Aug 25, 2004 7:37 am    Post subject: Reply with quote

AVR-DOS needs in minimum configuration appr. 1200 Bytes SRAM, so you can work with a Mega32 with 2 kB SRAM, if you have not to much SRAM-needing for your application. Please consider, that for Stacks (HW-Stack, SoftStack, Frame-Space) you need additional appr. 200 Bytes.
AVR-DOS itself is written in ASM and needs only 5 KB Flash-Size, if you use all features of AVR-DOS.

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regards Josef

DOS - File System for BASCOM-AVR on http://members.aon.at/voegel
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