bill.french's Content
There have been 260 items by bill.french (Search limited from 07-June 23)
#8178 How can I get instant (or close to) data from http...?
Posted by
on 23 January 2011 - 04:00 PM
in
Netduino Plus 2 (and Netduino Plus 1)
#8174 Quick and dirty GPIO speed test - findings
Posted by
on 23 January 2011 - 03:37 PM
in
General Discussion
...but not the Netduino, Secret Labs, or Chris Walker???Don't get me wrong, I love the .Net Micro Framework
Your posts ruffle my feathers! I'm still reeling from the basic comment on loading assemblies.
But, you're obviously brilliant and successful, so, I am still a Fabien Fan. I wish I was at least better looking, but we kind of look like we could be brothers.
I like it, it's very "sexy" in a mac sort of way, and works in 7 and OSX.PS: Bill, how do you like your Saleae analyzer so far?
..but, if feels very basic, feature wise. I've never used a logic analyzer before, so I'm not sure what I'm expecting. I was trying to "reverse engineer" an IR signal with it, and while it was useful, there was no way to compare two "bit trains" side-by-side from different samples, so I was cutting and pasting screen shots into paint.net. I have no idea if any logic analyzer has that sort of functionality. The software essentially has no menus, so I found myself hungry to do simple things like split the screen in two vertically.
#8173 How can I get instant (or close to) data from http...?
Posted by
on 23 January 2011 - 02:53 PM
in
Netduino Plus 2 (and Netduino Plus 1)
Yup, *Note to self: "srtw"* (http://www.stopreinventingthewheel.com)
LOL... i added the quote to that page. I think I'll start a collection.
Have you tried playing with my example above? I think it should work.
jquery is definitly the place to start (and probably end) for ajax, i think VS is has intellisense for it?
#8171 Coding style discussion
Posted by
on 23 January 2011 - 02:44 PM
in
General Discussion
Edit: Actually there is one other thing, what is DDD?: this http://www.gnu.org/software/ddd/?
my guess was this: http://en.wikipedia....n-driven_design
... i've added it to my extensive list of things to read about.
#8170 LEDs for netduino
Posted by
on 23 January 2011 - 02:39 PM
in
General Discussion
#8126 Quick and dirty GPIO speed test - findings
Posted by
on 23 January 2011 - 12:23 AM
in
General Discussion
There was a bit of discussion on this in an earlier thread:
http://forums.netdui...ch__1#entry6380
... also interesting, in the quadrocopter discussion, I had checked out the timings using my saleae logic and you can see what is apparently the scheduler getting involved:
http://forums.netdui...ndpost__p__7645
I did some new measurements with my saleae so i could zoom in and provide a different perspective of what you're talking about:
using this code: (this was so I could get the timings of the on/offs as equal as possible)
while(true)
{
b = !b;
d0.write(B);
}
I got this:
and using this code: (which is faster)
while(true)
{
d0.write(true);
d0.write(false);
}
I got this:
There is lots of interesting things to think about, I think.
1. It's interesting to me how much slower the first example is
2. We might want to keep track of these types of timings to have a handle on if firmware changes impact the timings at all
3. I wish I could mail Corey my saleae to get the timings under his fluet interopt... which is awesome. (Or, alternatively, I with I was brave enough to try it myself!)
http://www.youtube.com/watch?v=9EcEUbtgO2I
4. I wonder what the impact of things like GC and the scheduler are
#2 sounds like the start of development of a test suite for the netduino, where we can independently test the netduino during firmware upgrades. I might consider taking on this project myself. (Once I learn what a test suite is)
#8121 How can I get instant (or close to) data from http...?
Posted by
on 22 January 2011 - 10:08 PM
in
Netduino Plus 2 (and Netduino Plus 1)
1. How to get your javascript to get live data w/o refreshing the whole page?
2. Or a different way to get data from the netduino?
For #2, I don't know what you're going for.
For #1, check out jquery and the load command: (this would go in your refresh function once you have jquery included)
$('#myDiv').load('data.htm');
(to add jquery, use:
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>in your <head>)
... in your program.cs: (i have not tested this, so it's more of an idea than anything)
namespace NetduinoPlusWebServer
{
public class Program
{
public static void Main()
{
Listener webServer = new Listener(RequestReceived);
OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);
while (true)
{
// Blink LED to show we're still responsive
led.Write(!led.Read());
Thread.Sleep(500);
}
}
private static void RequestReceived(Request request)
{
if (request.URL == "data.htm")
{
request.SendResponse("some kind of data");
}
}
}
}
#8087 1-WIRE
Posted by
on 22 January 2011 - 02:27 AM
in
Netduino Plus 2 (and Netduino Plus 1)
#8085 Replace analog pot with Netduino using PWM
Posted by
on 22 January 2011 - 02:25 AM
in
Netduino 2 (and Netduino 1)
#8038 Interfacing with the uLCD-144 mini lcd screen
Posted by
on 21 January 2011 - 02:18 AM
in
Netduino 2 (and Netduino 1)
#8018 Replace analog pot with Netduino using PWM
Posted by
on 20 January 2011 - 07:11 PM
in
Netduino 2 (and Netduino 1)
#8012 Doing a PIC's Job
Posted by
on 20 January 2011 - 07:00 PM
in
General Discussion
other than the thermal pad, you could hand solder this, i think.So, I've been looking over battery charger ICs and I found one that I really like, the trouble is that it's a "thermally-enhanced TSSOP" package which has a pad that needs to get soldered to the circuit board. It also looks very surface-mount and I don't have anything to deal with that. Is there any way to utilize this IC or should I look for something that's easier to use?
Or use this: http://www.proto-adv...ucts_id=2210234
It has videos and everything!
#7992 "Universal" LCD Shield
Posted by
on 20 January 2011 - 01:54 PM
in
Project Showcase
#7964 "Universal" LCD Shield
Posted by
on 20 January 2011 - 03:40 AM
in
Project Showcase
http://www.sparkfun.com/products/10168 (monochrome, about $10)
...and...
http://www.sparkfun.com/products/10090 (color, about $32)
It also includes a 5 way tactile switch:
http://www.sparkfun.com/products/10063
Attached is the etch pdf from Fritzing if anyone cares to make one themselves.
Here's some pics:
1. With the color screen, running a simple drawing program I made up using the joystick:
2. With the B&W screen:
3. The shield with no screens:
4. The copper side, my technique has really improved:
Attached Files
-
LCD-Sheild-1_etch.pdf 7.97KB
22 downloads
#7963 Interfacing with the uLCD-144 mini lcd screen
Posted by
on 20 January 2011 - 03:15 AM
in
Netduino 2 (and Netduino 1)
#7932 About the forum (hard to read this theme)
Posted by
on 19 January 2011 - 08:26 PM
in
General Discussion
#7906 Basic question about managing classes
Posted by
on 19 January 2011 - 12:58 PM
in
Visual Studio
#7905 "Open Collector"
Posted by
on 19 January 2011 - 12:49 PM
in
Netduino 2 (and Netduino 1)
#7877 "Open Collector"
Posted by
on 19 January 2011 - 12:30 AM
in
Netduino 2 (and Netduino 1)
Master Reset signal. Internally pulled up to 3.3V via a 4.7K resistor. An
active Low pulse greater than 2 micro-seconds will reset the module. If
the module needs to be reset externally, only use open collector type
circuits. This pin is not driven low by any internal conditions. The host
should control this pin via one of its port pins using an open
collector/drain arrangement.
From wikipedia, I feel like I have a good handle on what "open collector" means -- but how do I do that with a netduino?
#7876 Basic question about managing classes
Posted by
on 19 January 2011 - 12:26 AM
in
Visual Studio
#7866 IR Transmitter?
Posted by
on 18 January 2011 - 06:54 PM
in
General Discussion
#7865 IR Transmitter?
Posted by
on 18 January 2011 - 06:51 PM
in
General Discussion
#7804 Fluent Interop 1.2
Posted by
on 17 January 2011 - 06:12 AM
in
Project Showcase
It certainly looks more responsive compared to your previous attempt, but what do you think?
#7787 Fluent Interop 1.2
Posted by
on 17 January 2011 - 01:19 AM
in
Project Showcase
#7698 NetDuino Quadrocopter
Posted by
on 15 January 2011 - 03:17 AM
in
Netduino 2 (and Netduino 1)
I think 'dones' was just teasing. [For reference, I apparently look about 3-5 years younger than my age as well. On my first driver license, I looked like I was in elementary school still.
Chris
Whoa, after meeting you at Maker Faire, I never would have guessed you were in your 50s!
