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Author Topic: Teensy 3.0  (Read 36796 times)
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Is there any news when we get buy one? Are there any European distributors stocking it?


It's in stock in the Netherlands now.

http://www.pieterfloris.nl/shop/category.php?id_category=45

Soon it'll be in stock in Germany...

http://www.hitechstore.de/produkte/3/
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Ordered.

Paul, feel free to ignore my earlier pm about UPS shipping rates from US to Europe.  smiley-twist
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Thanks Paul, ordering one now.
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Hi,
   Mine arrived in Dubai last night



Looking forward to trying some of the RCArduino projects on the board.

Duane B

rcarduino.blogspot.com
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Ordered one just now! Didn't get in on the KS in time, but now I can be one of the cool kids with a teensy 3.0.  smiley-mr-green

Looking forward to trying out the new SdFat16, and having a play with Paul's new development environment. BTW, Paul, thanks so much for providing the makefiles! Really appreciated by this recalcitrant emacs/command line tools user. Icing on the cake!
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Can the Teensy 3.0 USB interface be used to obtain a higher data acquisition rate than is possible with the serial interface?   If yes, could you provide one or more links to help me get started in the right direction?

Thank you for your sharing your expertise.

Howard
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Perhaps the words "obtain a higher data acquisition rate" are meaningful in the context of some specific project?  Certainly the USB virtual serial is MUCH faster than ordinary serial.

This post has results of USB speed testing I did.  Maybe this is the sort of info you're asking about?

http://www.kickstarter.com/projects/paulstoffregen/teensy-30-32-bit-arm-cortex-m4-usable-in-arduino-a/posts/317933
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BTW, Paul, the page

http://www.pjrc.com/store/teensy3.html

isn't navigable from the pjrc.com home page, you have to go to it directly (I picked up the link from the KS page).

Perhaps this is intentional to limit orders until you can restock, but just in case it had fallen through the cracks, I thought I'd mention it.
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BTW, Paul, the page

http://www.pjrc.com/store/teensy3.html

isn't navigable from the pjrc.com home page, you have to go to it directly (I picked up the link from the KS page).

Same for
  http://www.pjrc.com/store/teensy3_pins.html
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I have posted a version of SdFat that supports Teensy 3.0 as SdFatBeta20121020.zip http://code.google.com/p/beta-lib/downloads/list

I recommend using an industrial SD like this one http://www.newegg.com/Product/Product.aspx?Item=9SIA12K0CT6829

I ran the SdFat bench.ino example with this card at 96 MHz.  I used the following defines for the test:

Code:
#define FILE_SIZE_MB 10
#define FILE_SIZE (1000000UL*FILE_SIZE_MB)
#define BUF_SIZE 8192

Here is the result of the test with this low cost 1GB ATP card:

Quote
Free RAM: 4207
Type is FAT16
File size 10MB
Buffer size 8192 bytes
Starting write test.  Please wait up to a minute
Write 1934.99 KB/sec
Maximum latency: 11333 usec, Minimum Latency: 4144 usec, Avg Latency: 4228 usec

Starting read test.  Please wait up to a minute
Read 2111.61 KB/sec
Maximum latency: 4220 usec, Minimum Latency: 3870 usec, Avg Latency: 3877 usec
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I see that Alpha-Crucis in France has Teensy 3.0 (with pins) listed as a new product, at 28,75 € TTC (which means 'including tax'). Although they haven't translated the info into French yet.
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I recommend using an industrial SD like this one http://www.newegg.com/Product/Product.aspx?Item=9SIA12K0CT6829

I'm curious what the term "industrial SD" means. I gather this is not SDHC, but is there something specific about this particular SD card that makes it better for use with Arduino and sdfat ?
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I recommend using an industrial SD like this one http://www.newegg.com/Product/Product.aspx?Item=9SIA12K0CT6829

I'm curious what the term "industrial SD" means. I gather this is not SDHC, but is there something specific about this particular SD card that makes it better for use with Arduino and sdfat ?

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Industrial-grade cards are made to endure severe operating conditions such as high impact, continuous vibration, low  and/or high operating temperature. These cards are durable and can last intensive reads/writes. Certain cards are even made to be moisture-resistant. Consumer-grade memory cards are not as durable. For most of the industrial applications which normally require intensive I/O cycles, the consumer-grade cards tend to fail prematurely.

reliable storage of 2,000,000 write/erase cycles and 10-year data retention,
http://www.psism.com/industrialsd.htm
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Consumer-grade memory cards are not as durable.
I'm not very convinced.  If you think the chips inside come off of some different fab or have substantially different characteristics, or if they're assembled using any substantially different techniques, I think you are easily deceived.  You MIGHT be getting "industrial temperature range" chips rather than "commercial temp range" (which itself is somewhat ambiguous as to meaning), and you might be getting better pre-sale testing...
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I don't know if "industrial" is different, but I can tell you there is a huge difference in performance between SD cards sold for consumer use.  The SDHC speed class is often unrelated to the real-world performance when small, random access is made.

I recently tested several of my cards, while trying to use a Raspberry Pi.  I used one of the PC disk benchmark, which does large and small sequential and random reads and writes (8 tests in total).  On the random write test, many of the cards had about 10 kbytes/sec speed, which incredibly slow.  My fastest card was a 32 GB Sandisk Ultra, at well over 1 Mbyte/sec in the random 4k write.  I had another 32 GB card, I believe Patriot or PQI, which ran at about 10 kbytes/sec in the random write.  It performed very well with sequential access, but very poorly for random reads or write.  Since then, I sold a camcorder with that card included.

Sadly, the Raspberry Pi has a bootloader bug that makes it incompatible with some cards.  My only really fast card is one of those.  Since then, I've been too busy with Teensy 3.0 to do much with Raspberry Pi, but I plan to look at it again in a couple months.

The "industrial" card might be just marketing, or it might actually mean the card has whatever better chip is in that Sandisk Ultra that makes it so capable of managing small, random accesses that other cards service at only glacial speeds.

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