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Mattster's Content
There have been 45 items by Mattster (Search limited from 30-March 23)
#39763 Seeduino GPRS / GSM shield
Posted by Mattster on 20 November 2012 - 09:23 PM in Netduino 2 (and Netduino 1)
#39762 Seeduino GPRS / GSM shield
Posted by Mattster on 20 November 2012 - 09:21 PM in Netduino 2 (and Netduino 1)
#39255 Netduino Plus 2 Pinout Reference Sheet
Posted by Mattster on 13 November 2012 - 02:04 PM in Netduino Plus 2 (and Netduino Plus 1)
Yes, they were waiting patiently for me to get home on Sunday (had to go to Boca Raton on Saturday). Started playing with the last night.
Chuck
Went to Boca Raton and didn't bother to stop by for a beer?
#38428 Program in assembly language?
Posted by Mattster on 03 November 2012 - 12:53 PM in Netduino 2 (and Netduino 1)
#38350 Nwazet Go Pro Kit
Posted by Mattster on 01 November 2012 - 07:30 PM in Netduino Go
#37453 Dynamic programming
Posted by Mattster on 20 October 2012 - 12:14 AM in Netduino Go
Hi Mattster,
Check out the MonoBootloader in the Mono forum. It loads assemblies from an SD card.
Chris
Kewl, thanks!
#37449 Dynamic programming
Posted by Mattster on 19 October 2012 - 11:19 PM in Netduino Go
CW2: thanks for the insights, and yes, the number of rewrites is an issue. Can you point me at any additional references on the use of external memory? Also, what can you tell me about the performance of external memories?I have run code from both RAM and flash without any problems. I also believe the code executes from flash a little bit faster than from RAM, because of the dedicated I-Bus and prefetch buffers (when running from RAM, "...the instruction hast to be fetched using the system bus, which incurs and extra wait state" [1]), but I have not performed any measurements. If the number of internal flash rewrite cycles is an issue, you might want to consider using and external memory (100 k cycles and more) , STM32F4 micros have external memory bus interface .
[1] The Insider's Guide To The STM32 ARM Based Microcontroller
Thanks!
#37448 Dynamic programming
Posted by Mattster on 19 October 2012 - 11:18 PM in Netduino Go
Hi Mattster,
Your code should run with about the same efficiency from flash or RAM. If you're pulling in code on the fly, I'd recommend running it from RAM.
STM32F4's flash is rated for a minimum of 10,000 flash cycles.
Chris
P.S. Here's an article talking about Flash vs. RAM execution speed on STM32F4.
Both flash and RAM execution are high-performance.
http://www.futurlec....F4_Series.shtml
Chris:
Thanks for the confirmation of my understanding on the flash re-write limitations. I seem to recall reading somewhere here (maybe in the N+ forum?) about runtime loading of executable modules - do you know where I might have seen this?
Thanks,
Mattster
#37431 Dynamic programming
Posted by Mattster on 19 October 2012 - 02:59 PM in Netduino Go
#36592 Introducing Netduino Go
Posted by Mattster on 05 October 2012 - 07:12 PM in Netduino Go
#36517 Introducing Netduino Go
Posted by Mattster on 04 October 2012 - 12:24 PM in Netduino Go
Hi Mattster,
Netduino Go can exchange data with GoBus modules using a SPI transport speed of up to 21 megabits/sec.
Simpler modules (like an RGB LED) will communicate at a slower speed, but more sophisticated modules (like the Ethernet module or Shield Base) can exchange data at speeds near or equal to the maximum.
BTW, communication is full duplex. So that's 21mbps simultaneously in each direction. ACKs are included in frame headers, so there is no waiting for dedicated ACK frames.
Chris
So I should be able to plug to NGo main boards together with a GoBus cable and get 21 mbits between them?
#36397 Introducing Netduino Go
Posted by Mattster on 02 October 2012 - 01:34 AM in Netduino Go
#30642 N+ Virtual Memory?
Posted by Mattster on 13 June 2012 - 10:01 PM in General Discussion
#30641 Oscilloscope
Posted by Mattster on 13 June 2012 - 09:57 PM in General Discussion
#30640 Netduino Version Compatibility
Posted by Mattster on 13 June 2012 - 09:39 PM in General Discussion
#28824 [nwazet Power Supply Module
Posted by Mattster on 11 May 2012 - 02:36 PM in Netduino Go
#28632 Slider module
Posted by Mattster on 07 May 2012 - 12:11 PM in Netduino Go
#28181 GO! Module wishlist
Posted by Mattster on 27 April 2012 - 03:04 AM in Netduino Go
#28085 Powering the Netduino Go! with a Lipo
Posted by Mattster on 25 April 2012 - 03:39 PM in Netduino Go
#28084 Need a good intro to hardware book
Posted by Mattster on 25 April 2012 - 11:50 AM in General Discussion
#27815 Netduino Go! RGB Umbrella
Posted by Mattster on 21 April 2012 - 01:08 PM in Project Showcase
#27424 Building custom go!bus modules for Netduino Go
Posted by Mattster on 17 April 2012 - 01:29 AM in Netduino Go
Having a shrouded header for JTAG would be cool though...would make it hard to plug in the cable backwards.
Chris
I got the unshrouded one from Mouser but was thinking that my Very Cool Black Limited Edition NG0 deserved a shrouded one in a contrasting color.
#27390 Building custom go!bus modules for Netduino Go
Posted by Mattster on 16 April 2012 - 06:47 PM in Netduino Go
Would it help if we bought a few thousand of each and bundled them in 10-packs for $9.95?
Chris
I would buy a ten-pack for $9.95. Mouser only sells the thru-holes in quantity 990 at $.55.
This would be for populating the JTAG
#26681 Hardware Details: Shield Base
Posted by Mattster on 07 April 2012 - 02:06 PM in Netduino Go
#26638 Hardware Details: Netduino Go (mainboard)
Posted by Mattster on 06 April 2012 - 02:20 PM in Netduino Go
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