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16  Development / Other Software Development / Re: Can Arduino Due enable two SPI interface at the same time (different in all pin) on: February 12, 2013, 10:49:36 am
Yes, SPI will support multiple chips.  You need to define a chip select for each chip.  Select the chip, run the SPI, deselect the chip, repeat for next chip.  See: http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus



David

17  Development / Other Software Development / Re: Expert Comment Needed on a New I2C Library API on: February 10, 2013, 07:56:00 pm
You can enable internal pull-ups ... that doesn't prevent the user from also using external pull-ups.  A comment with a short table of recommendations would be useful.  Something like "External pull-ups are recommended unless the bus length is very short.  Recommended values are: 10KHz ..."

David
Victoria, BC
18  Development / Other Software Development / Re: Library for Nokia LCD (128x128) on: January 13, 2013, 08:04:48 pm
Thanks,
this looking sweet. 
David
----------------------
OpenLCB Dev Team
19  Development / Other Software Development / Re: Documentation confusion: on: December 28, 2012, 07:31:03 pm
Yes it does mean that, and no I can't think of any way that is useful offhand. Maybe to loopback test software serial or something.
A 2 pin bi-colour LED maybe.

Yes, with a bipolar LED:
0) pin1 LOW, pin2 LOW  LED off
1) pin1 HIGH, pin2 LOW  LED one colour
2) pin1 LOW, pin2 HIGH  LED other colour
3) pin1 HIGH, pin2 HIGH  LED off

Note, if you have a RED/GREEN LED, then alternate state s1 and 2 about gives YELLOW (or some approximation), changing the duty cycle lets you 'tune' the colour. 

David
20  Development / Other Software Development / Re: Forth programming language? on: November 15, 2012, 01:29:39 pm
Yes, I have a fondness for Forth, too.  The limited resources on early Arduinos, read limited RAM, since thats where a 'real' Forth wants to live, made it a very limited system, unless one went for a blended system where development occurs on your computer, compiled and uploaded to the Arduino, which is more complicated. 

However, with the newer Arduinos with more powerful mpus, this should be much easier now, and a more traditional standalone Forth with adequate resources sounds eminently possible. 

David Harris
OpenLCB Dev Team
21  Development / Other Hardware Development / Re: Arduino Without FTDI chip using V-USB (Virtual USB) on: November 12, 2012, 12:58:32 pm
However, it should be possible to use a software serial connection through the usb. 

David
22  Development / Other Hardware Development / Re: NMEA 2000 Shield on: July 29, 2012, 12:15:38 pm
What do you need help with exactly?  My boat has a Volvo engine that sends their variant of this -- would be nice to interface to it. 

David
23  Development / Other Hardware Development / Re: W5200 Module on: June 16, 2012, 12:41:53 pm
I can echo that: make sure you have not confused MISO/MOSI -  triple check, and check again, and check it against other designs.  More than one person has got them backwards, as their sense is sometimes different from chip to chip. 

Also, please place jumpers for the CS, some clones need to use other pins for these.   Only one jumper needs to be populated in most cases, so not a biggy, but better than me having to cut traces. 

Thanks!

David
24  Development / Other Hardware Development / Re: Seeeduino stalker on: June 05, 2012, 12:39:35 pm
I have not, yet, gone down this road.  However, a UNO compatible with these features would be nice.  Should be a little cheaper, too! 

David
25  Development / Other Software Development / Re: ChibiOS/RT 2.4.0 RTOS update on: May 28, 2012, 11:33:15 am
Wow, nice documentation!   The pages are very clear, the tree is great, and the references to the actual code.  Is the underlying structure of those webpages available to other groups?   
Thanks.
26  Development / Other Hardware Development / Re: LED display replacement for HD44780? on: April 24, 2012, 03:24:24 pm
Yes, a small processor could replace your shift registers and expose a hd44780 interface.  It would likely be as cheap if not cheaper, and easier to use fir he masses smiley-wink

David
27  Development / Other Software Development / Re: Céu: a high-level programming language that runs on Arduino on: February 03, 2012, 09:16:07 pm
Very interesting!   I will have to give it a try. 

David
28  Development / Other Hardware Development / Re: FEZ Music Shield on: January 12, 2012, 02:18:21 pm
There are Downloads and Support tabs on that very page that lead to code/libraries - does that not help? 

See: http://code.tinyclr.com/project/330/fez-music-shield/

Also a simple Google search for "VS1053 Arduino" leads to code, see Sparkfun for example http://www.sparkfun.com/products/10628,

and a discussion on this forum at http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1247665182/10

But it seems lazy for you to ask us to help you when it would appear you have done none of the above, even though I have done it in 1 minute.  Some show of effort makes people want to help. 

Sorry, I am feeling abused.   Better I should have blown you off!?   
29  Development / Other Software Development / Re: Fast digital I/O and software SPI with C++ templates on: January 04, 2012, 11:14:50 pm
Wow, this looks really good. 

Is it possible to define arrays of pins, so that you can access them with myPin.write(HIGH)? 

Thanks,
David
30  Development / Other Hardware Development / Re: DCC Arduine design oversight on: December 12, 2011, 09:59:26 pm
Hey!  Tell us more.   Scale, how to use etc.  Looks interesting :-)

David
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