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There have been 15 items by skyjumper (Search limited from 10-May 23)
#31257 Very basic questions...
Posted by skyjumper on 27 June 2012 - 04:31 PM in General Discussion
#31240 Very basic questions...
Posted by skyjumper on 27 June 2012 - 05:08 AM in General Discussion
#31711 SPI Slave
Posted by skyjumper on 07 July 2012 - 08:02 PM in Netduino Plus 2 (and Netduino Plus 1)
The biggest reason that .NET MF probably doesn't have support for SPI Slave natively is that most SPI slaves seem to need to respond to an incoming request within the same SPI transaction and typically within 1 SPI clock cycle...and .NET MF is not real time. If you're just wanting to send data to the Netduino, that should totally be possible.
Chris, about the real time constraint, is it possible to write an ISR to handle the incoming data from SPI? Your earlier note seems to imply that the code would have to poll the SPI registers for incoming data. I'm okay with code and micro processors, but I know nothing at all about .NET.
#28332 Porting Arduino code to Netduino
Posted by skyjumper on 30 April 2012 - 09:57 AM in General Discussion
#32084 Netduino speed vs native 48Mhz Atmel code
Posted by skyjumper on 17 July 2012 - 01:44 AM in General Discussion
In my own tests a while ago, I determined that the C# code runs roughly 100 to 1000 TIMES slower than the equivalent C++ code. The bottom line is that it is very slow but you get an excellent development environment and a managed language that makes coding up complex tasks much easier and faster, as long as you don't need super fast execution.
Not sure whether that helps or not.
I guess I could always throw more hardware at it! What's nice about .NET is the threading. It would be very easy to code up my custom web server. If I want to do this as native I probably need a threaded RTOS.
#31769 Netduino speed vs native 48Mhz Atmel code
Posted by skyjumper on 09 July 2012 - 05:22 PM in General Discussion
Netduino does not expose the JTAG pins of the CPU but as you can upload new firmware via serial, it would surprise me if you cannot do this via AVR, especially since AVR is an Atmel development tool.
Found this howto on programming using AVR and serial programmers are mentioned but could be they are merely serial interfaces for JTAG headers:
http://www.ladyada.n...rogrammers.html
If I'm not mistaken Secret Labs used/use AVR when porting tinyCLR.
See also this thread discussing toolchains for native programming of the Netduino:
http://forums.netdui...ools-do-i-need/
Thanks very much! That thread is very interesting. I'm glad I'm not the only one who is overwhelmed by all this ARM stuff.
AVR Studio 6 seems to support Atmel's Mega, XMega and Cortex M offerings. That last part I'm not so sure about, "Cortex M." I think that means the SAM7x is not supported since its not listed. Back to Wikipedia I guess... I gotta learn more about the ARM variations.
#31687 Netduino speed vs native 48Mhz Atmel code
Posted by skyjumper on 07 July 2012 - 02:38 AM in General Discussion
#32094 Netduino Plus / AT91SAM7X-EK compatibility
Posted by skyjumper on 17 July 2012 - 07:16 AM in Netduino Plus 2 (and Netduino Plus 1)
Good evening, can you please tell me how you did to configure NUT/OS to be compatible with netduino.
Best Regards,
I would love to know this as well. I know its an old thread, but I just figured I would bump it ;-)
#31390 Netduino as I2C slave?
Posted by skyjumper on 01 July 2012 - 02:14 AM in General Discussion
#31395 Netduino as I2C slave?
Posted by skyjumper on 01 July 2012 - 03:23 AM in General Discussion
#31721 If you were to get two netduinos to talk to each other, what would you use?
Posted by skyjumper on 08 July 2012 - 04:16 AM in Netduino 2 (and Netduino 1)
#31685 I2C communication with GainSpan GS1011
Posted by skyjumper on 07 July 2012 - 02:20 AM in Netduino Plus 2 (and Netduino Plus 1)
#31239 Embedded web server hardware
Posted by skyjumper on 27 June 2012 - 04:58 AM in Project Showcase
#31393 Analog Pins Without SecretLabs Library
Posted by skyjumper on 01 July 2012 - 02:29 AM in General Discussion
#31683 40% discount on Netduino Plus e-book (O'Reilly / MAKE)
Posted by skyjumper on 07 July 2012 - 02:07 AM in Netduino Plus 2 (and Netduino Plus 1)
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