I'm using this keypad: http://www.adafruit.com/product/419

with the Toolbox.NETMF.Hardware.MatrixKeyPad driver and I'm getting a lot of bounce. It appears that the "time" parameter of the event handler is not working correctly. For example, in the code below, ButtonLastPushed is initially 0 and the first time the button is pushed "time" is zero also. Has anyone else run into this problem and found a fix?

/// Triggered when a key is pressedstatic void kb_OnKeyDown(uint KeyCode, uint Unused, DateTime time) {   if (ButtonLastPushed.AddMilliseconds(intBounceWait) > time) return; // prevent bounce   ButtonLastPushed = time;   Debug.Print("Key pressed: " + KeyLookup((int)KeyCode).ToString()); }

I'll have to retract that last post. It does not work either. Looks like there is something wrong with the clock...

This is weird. The clock works. Debug printing .Now shows the clock incrementing. Maybe it is the keypad.

Thanks for the input Karl. I'll give your suggestion a try.

-Capel

To start with I'm using the N+2. Sorry about posting in the wrong forum if this has anything to do with it.

The value of the "time" parameter is always 00:00:00 as if there were no clock at all on board. I don't expect the board to have the current time, just the time relative to startup. I can work around my problem with the code below, but I expected the Toolbox.NETMF.Hardware.MatrixKeyPad code to work and was wondering if anyone else had seen this problem.

static void kb_OnKeyDown(uint KeyCode, uint Unused, DateTime time){   KeyDown(KeyLookup((int)KeyCode), DateTime.Now);}// Process the keypad inputstatic void KeyDown(int KeyVal, DateTime dtTime)  {  if (ButtonLastPushed.AddMilliseconds(intBounceWait) > dtTime) return; // prevent bounce  ButtonLastPushed = dtTime;...

This is a great question, but I'm curious to know what people are using for battery packs. My N+2 is driving a single 4 channel relay board...

Have you looked at the .Net Micro Framework Toolbox?

http://netmftoolbox....pported devices

CW2, thanks for your response. I made the changes you suggested and still had a problem. Then I realized that I had not tied the 3v button cell ground to the NP2 ground. Once I did that, everything seems to work just fine.

I'm seeing some odd behavior for what should be a simple project. Maybe I'm missing something and someone can point out the error of my ways?

What I'm trying to do is capture a sensor input. To test my code I've simulated the sensor with a simple momentary push button. See the schematic attached.

The problem is when I push one button, it triggers the interrupt for the other buttons. Here is my code:

public class Program2        {        static DateTime dtLastPress;        static int intBounceWait = 200;        public static void Main()            {            InterruptPort ipT1 = new InterruptPort(Pins.GPIO_PIN_D0, false, Port.ResistorMode.PullDown, Port.InterruptMode.InterruptEdgeLow);            ipT1.OnInterrupt += T_OnInterruptT1;            InterruptPort ipT2 = new InterruptPort(Pins.GPIO_PIN_D1, false, Port.ResistorMode.PullDown, Port.InterruptMode.InterruptEdgeLow);            ipT2.OnInterrupt += T_OnInterruptT2;            InterruptPort ipT3 = new InterruptPort(Pins.GPIO_PIN_D2, false, Port.ResistorMode.PullDown, Port.InterruptMode.InterruptEdgeLow);            ipT3.OnInterrupt += T_OnInterruptT3;            InterruptPort ipT4 = new InterruptPort(Pins.GPIO_PIN_D3, false, Port.ResistorMode.PullDown, Port.InterruptMode.InterruptEdgeLow);            ipT3.OnInterrupt += T_OnInterruptT4;            Thread.Sleep(Timeout.Infinite);            }        static void T_OnInterruptT1(uint data1, uint data2, DateTime time)            {            if (dtLastPress.AddMilliseconds(intBounceWait) > time)  // prevent bounce                {                Debug.Print("T1 = bounce wait");                return; // prevent bounce                }            dtLastPress = time;            RecordPress(1, time);            }        static void T_OnInterruptT2(uint data1, uint data2, DateTime time)            {            if (dtLastPress.AddMilliseconds(intBounceWait) > time)  // prevent bounce                {                Debug.Print("T2 = bounce wait");                return; // prevent bounce                }            dtLastPress = time;            RecordPress(2, time);            }        static void T_OnInterruptT3(uint data1, uint data2, DateTime time)            {            if (dtLastPress.AddMilliseconds(intBounceWait) > time)  // prevent bounce                {                Debug.Print("T3 = bounce wait");                return; // prevent bounce                }            dtLastPress = time;            RecordPress(3, time);            }        static void T_OnInterruptT4(uint data1, uint data2, DateTime time)            {            if (dtLastPress.AddMilliseconds(intBounceWait) > time)  // prevent bounce                {                Debug.Print("T4 = bounce wait");                return; // prevent bounce                }            dtLastPress = time;            RecordPress(4, time);            }        static void RecordPress(int intTarget, DateTime time)            {            Debug.Print("T" + intTarget.ToString() + " = " + DateTime.Now.ToString("MM/dd/yy H:mm:ss.fff"));            }        }

If I run the code and press the buttons in order (T1, T2, T3, T4) I get the following output:

I definitely have a conflict with the SPI pins. If I free up D10-D13 I'm 2 pins short of what I need for the project.

NooM,

I have the N2 with a 2gb SD card.

The reason I say it does not appear to work is because my app works when the I/O is connected to the N2, but when I plug in the SD shield and move all the I/O wires to it, the app will not run. Nowhere does the documentation say it is Netduino compatible, I was assuming it was when I bought it, now I'm trying to confirm this assumption. I have not written any code to read/write to the SD card, yet.

You can see my initial schematic here: http://forums.netdui...uttons-and-lcd/

I'm not familiar with eeproms, would you point me to some tutorials? I like the sound of cheap:)

I purchased a Seedstudio SD shield (http://www.seeedstud...l?cPath=132_134

) but it does not appear to work. Has anyone used this shield with the Netduino?

If not, what shield do you suggest?

I need to store 18 configuration values (double) from one power up to the next...

-Capel

I used the DS1307 real time clock from Adafruit: http://www.adafruit.com/products/264

Wow, that's a heck of an undertaking! So what's the motivation? Are you implementing features not found on the Shearwater or Hammerhead units? (BTW, I'm not a CCR diver but I was tech diving long before the term was ever coined.)

I saw you using gradient factors in the video. What deco algorithm are you using and did you code that yourself?

What do you use for a HUD?

It looks like you have certainly found a creative outlet  I look forward to following your progress...

Val, thanks for the reply. I've decided to start a new log file at 25k, but I will give Debug.GC a try.

-Capel

In my N+2 app, I log things to a text file for later debugging. I use this code in a function:

using (var filestream = new FileStream(@"SDrunlog.txt",FileMode.Append))                    {                    StreamWriter streamWriter = new StreamWriter(filestream);                    streamWriter.WriteLine(DateTime.Now.ToString("MM/dd/yy H:mm:ss.fff") + ": " + strMsg);                    streamWriter.Close();                    //Debug.Print(DateTime.Now.ToString("MM/dd/yy H:mm:ss.fff") + ": " + strMsg);                    }

When my log file gets over 33k I get a failed allocation error when creating the new streamwriter:

StreamWriter streamWriter = new StreamWriter(filestream);

Any idea on what is causing this and how to avoid it?  

I got the Edimax 6258n and installed but I'm having some issues.

Here is my configuration:

• Belkin N300 Wireless Router
• No WAN connectivity
• DHCP turned off
• Static IP of 192.168.1.1

• Edimax 6258n
• Setup as Station Infrastructure as described in http://www.edimax.us...rastructure.pdf
• Static IP of 192.168.1.99

• Netduino +2
• Setup with static IP of 192.168.1.100

• Laptop PC
• connected to Belkin N300 wifi
• Static IP of 192.168.1.29

My PC application uses a socket connection to talk to the Netduino on port 9999 and 9998. This works fine in a hard wired environment.  In this environment, I can ping the IP addresses of all the devices, but when I go to establish a socket connection I get an error saying "No connection can be made because the target machine actively refused it."

I tried configuring the Port Forwarding feature of the Edimax, but that did not seem to work either.

Does anyone have an idea on how to get the Edimax to allow tcp/ip traffic on designated ports?

I got everything working. I just needed to boot the Edimax and wait 60 seconds before powering up the N+2. When powering them up at the same time, the N+2 did not see the Edimax, but if I waited a minute, everything worked as advertised.

Baxter, yes I have it setup the way you described and port forwarding was not my issue. 

Baxter,

If I could use the USB port, it would make things easier. So I will now go down the path you suggest.

-Capel

Could I use a male to male USB cable to power the Edimax BR-6258n NANO via the N+2 if I have a battery providing power to the N+2?

Paul,

Thanks for this very informative post. I was trying to avoid adding 9 components to my system, but based on your observations, that may be unavoidable. Given this, would MOSFETs be a better choice than Darlington pairs?

-Capel

So I have gotten my shift register to work with my N+2, but the lasers I'm trying to drive require 300mA of current each. So to drive 9 of these, I need almost 3A at 2.5 - 4.5 vdc.  This is way too much for the N+2 and the 74HC595. I've been looking at some transistor arrays, but I'm not sure how to wire them. Can anyone point me to a circuit that uses this 8ch Darlington Sink driver (or something similar)?

It's a feature on our wish list, something that we baked into the hardware design. Right now we're focused on ensuring that all Netduino Plus 2 features work really well for our community and that projects upgrade seamlessly.

After the holidays we'll start attacking new software features. If this one gets the most votes, it gets in the first batch

Chris

Did this make the list?