netduinohelpers Discussions Rss Feed

New Post: VC0706 TTL Weatherproof Camera and Netduino Plus

ajorge — Wed, 17 Apr 2013 10:27:54 GMT

Good Morning,

I have bought this VC0706 Camera and I want to use it with my Netduino Plus. But first of all, I need to know if the camera is ok. So, I tried to use the CommTool provided by Adafruit and checked their tutorial to connect the camera to an arduino. With all the connections done, i can't access my camera. I also saw its driver here at Netduino Helpers, but... Do I need to upload this driver to the netduino in order to have the CommTool working?

I'll be waiting for your feedback.

Thanks in advance.

New Post: JSON Parser minor glitches?

Humancell — Thu, 11 Apr 2013 18:39:58 GMT

Hello,

"As I mentioned it a few times in the past, I understand that the latest check-in for this parser / sample code is broken. The previous version and sample code (see the original Klout Klock check in worked). I am sorry for the inconvenience but I have no resources to focus on this library unfortunately."

Sorry ... when I saw the sample code with the sample "klout" JSON in it, I though you meant this sample should work.

I'm sorry it's not working right now, I've tried to go through and understand the pattern/logic that you are using, but I've missed something. The issue is where you are nearing the end of a structure, and perform an extra attempt to pop a name/value pair when there is only a name left on the stack.

I haven't spent the time to dig more and determine where the check is missing to prevent this.

Thanks for the rest of the code ... hopefully someone else will have better luck debugging the parser, without docs I'm just not quite understanding the pattern enough.

Scott

New Post: JSON Parser minor glitches?

FabienRoyer — Thu, 11 Apr 2013 17:44:49 GMT

Hi Scott,

"Fabien, I'm not sur eif you understand, but even your sample code is broken and will not run."

As I mentioned it a few times in the past, I understand that the latest check-in for this parser / sample code is broken. The previous version and sample code (see the original Klout Klock check in worked). I am sorry for the inconvenience but I have no resources to focus on this library unfortunately.

-Fabien.

New Post: JSON Parser minor glitches?

Humancell — Tue, 09 Apr 2013 02:20:58 GMT

Hello,

Innovactive I really appreciate you also working to debug the issues with this JSON parser. Fabien, I'm not sur eif you understand, but even your sample code is broken and will not run.

Innovactive when I looked at your proposed fix, I can not find any changes to the StoreDataInCurrentDataStructure() method ... did you happen to paste something wrong?

This is really a great set of helpers, and I appreciate the work that has gone into it! If I can find a solution I'll make sure to post my fixes also!

Scott

New Post: adafruitnetduinologger on netduino plus 2

fabienroyer — Mon, 18 Feb 2013 04:11:27 GMT

Hi,

You should not be asked for a password when unzipping the archive.

Please follow these steps:

Hit download on the project page
Open the archive resulting from the download
Navigate to \netduinohelpers_e0ddb8758a93\Samples\Coding4Fun
Extract the AdafruitNetduinoLogger project from the archive
Double click on AdafruitNetduinoLogger.sln within the extracted AdafruitNetduinoLogger
Compile the project and deploy it to your Netduino Plus

Any questions related to migrating projects from Netduino Plus to Netduino Plus 2 should be addressed in the Secret Labs forums.

Cheers,
-Fabien.

New Post: adafruitnetduinologger on netduino plus 2

jrmon — Sun, 17 Feb 2013 06:55:40 GMT

Hi,
I started with netduino plus 2 and I am trying to test out with the adafruit datalogging shield.
I downloaded the netduinohelpers_e0ddb8758a93 and found the adafruitnetduinologger sln and I am not sure I got everything right because during unzipping on some files, it was asking for the password. Then after opening the adafruitnetduinologger.sln and viewing the solutions explorer, I noted that it is calling the Secretland.NETMF.Hardware.netduinoplus in the reference section. But in the project properties, the netduino plus 2 device shows as "netduino2_netduino" instead of "netduinoplus2" (.NET MF tab). Please help point out which dlls I should remove/replace with and if there are other details I need to be aware of. Thanks.

New Post: Migrate to MF 4.2 ?

eschneider0001 — Fri, 18 Jan 2013 16:55:15 GMT

I'm trying to migrate to MF 4.2, because that is what Netdruino plus 2 supports.

I get the following error:

Error 1 The type or namespace name 'PWM' could not be found (are you missing a using directive or an assembly reference?) D:\Dev\Netduino\netduinohelpers_e0ddb8758a93\Fun\ConsoleHardwareConfig.cs 13 16 netduino.helpers

Also MF 4.3 is available...

New Post: How to connect AdaFruit ILI932x TFT display to netduino

softkey87 — Thu, 17 Jan 2013 12:31:54 GMT

Hi! Thanks a lot for the answer!

New Post: How to connect AdaFruit ILI932x TFT display to netduino

fabienroyer — Tue, 15 Jan 2013 01:46:21 GMT

Hi,

Connecting an ILI932x to a Netduino through a shift register will be *extremely slow*. This communication method over SPI with that display controller was merely used as a proof of concept while I was developing this Touch Display module for Netduino Go: http://nwazet.com/touch-display-module

As you will notice, the architecture of the module is quite different... I hope this helps to clarify what is achievable on a Netduino and what is not.

Cheers,

-Fabien.

New Post: How to connect AdaFruit ILI932x TFT display to netduino

softkey87 — Tue, 15 Jan 2013 01:20:26 GMT

Hi, I'm also looking how to connect an ILI932x display.

Have you found something?

Thanks

New Post: JSON Parser minor glitches?

fabienroyer — Sun, 13 Jan 2013 17:19:41 GMT

Hi,

I've mentioned it a couple times in the past: this JSON parser is a minimalist implementation that met my needs when I wrote it (i.e. parsing Klout feeds at the time). It's not robust and has issues that I never got around to fixing (but I called them out ;-) If you have the time to create a pull request with the fixes you proposed, I'll integrate them as soon as I get the chance.

Thank you,

Cheers,

-Fabien.

New Post: JSON Parser error

innovactive — Sun, 13 Jan 2013 06:11:12 GMT

See our latest discussion thread for a (temporary?) work-around for this issue.

New Post: JSON Parser minor glitches?

innovactive — Sun, 13 Jan 2013 06:09:45 GMT

Hi. Despite your JSON parser for .NETMF is by far the best we found on the net, using it to parse COSM triggers HTTP request seems to show a couple of small glitches that sadly prevent to use it as is.

At this time we modified following two methods this way:

protected void StoreDataInCurrentDataStructure()
        {
            if (_currentDataStructure.ObjectType == JSONObjectType.Object)
            {
                var value = (string)_dataStack.Pop();
                var name = (string)_dataStack.Pop();
                Debug.Print("DAT: Popped pair: " + name + " = " + value);
                var hashTable = (Hashtable)_currentDataStructure.Object;
                hashTable.Add(name, value);
                return;
            }
            else
            {
                var value = (string)_dataStack.Pop();
                Debug.Print("DAT: Popped value: " + value);
                var arrayList = (ArrayList)_currentDataStructure.Object;
                arrayList.Add(value);
            }
        }
        protected void StoreCurrentDataStructure()
        {
            var innerStructure = (JSONObject)_dataStructureStack.Pop();
            if (_dataStructureStack.Count == 0) return;

            _currentDataStructure = (JSONObject)_dataStructureStack.Peek();
            if (_currentDataStructure.ObjectType == JSONObjectType.Object)
            {
                var name = (string)_dataStack.Pop();
                Debug.Print("STR: Popped data: " + name);
                var hashTable = (Hashtable)_currentDataStructure.Object;
                hashTable.Add(name, innerStructure);
            }
            else
            {
                var arrayList = (ArrayList)_currentDataStructure.Object;
                arrayList.Add(innerStructure);
            }
        }

Could you please check whether they are ok?

Btw, we found this helper could be useful, too:

public object GetHierarchicalValue(Hashtable hashTable, string Path)
        {
            string[] parts = Path.Split('/');

            Hashtable htLoop = hashTable;

            foreach (var part in parts)
            {
                if (htLoop[part] is JSONObject)
                {
                    htLoop = (htLoop[part] as JSONObject).Object as Hashtable;
                }
                else
                {
                    return htLoop[part];
                }
            }

            return null;
        }

This way, you could for example get specific values using following syntax:

JSONParser parser = new JSONParser(1024);

            var ht = parser.Parse(content);

            string symbol = parser.GetHierarchicalValue(ht, "triggering_datastream/units/symbol").ToString();
            string value = parser.GetHierarchicalValue(ht, "triggering_datastream/value/value").ToString();

BTW, what about encapsulating Hashtable in parser object?

Thanks!

New Post: How to connect AdaFruit ILI932x TFT display to netduino

ledinhhn — Mon, 24 Dec 2012 15:32:39 GMT

Please, show me how netduino connect to AdaFruit ILI932x TFT display. I saw that netduino connect to AdaFruit ILI932x TFT display via Shift register 74hc595. But i dont know how many Ics has to used, and how to connect from 595 to AdaFruit ILI932x TFT display. Please give me the schematic.

Thanks for alls

Le Dinh

New Post: Slight Modification Used in ST7735 to get running

bertrandleroy — Fri, 21 Sep 2012 19:45:34 GMT

You don't need write access: just make a pull request.

New Post: Slight Modification Used in ST7735 to get running

freestylecoder — Fri, 21 Sep 2012 19:42:19 GMT

Hi guys.

I just downloaded the library to get the AdafruitST7735 library. I'm using the shield version of the ST7735 and had a Smurf of a time getting it to run correctly. I kept getting garbage sent to the device until I tweaked Refresh as follows


public void Refresh() {
	DataCommand.Write( Command );
	Write( (byte)LcdCommand.RAMWR );  // write to RAM

	DataCommand.Write( Data );
	Spi.Write( SpiBuffer );
}

I appears something in the library wasn't resetting the command to write to RAM.

Also, I'm probably going to update this thing with a few more functions, so I'll probably ask for write access.

Keep up the good work, I was pulling my hair out trying to figure out the SPI conversions...

New Post: Max72197221 ExtendedSpiConfiguration NullReferenceException

jhalbrecht — Sat, 04 Aug 2012 23:04:59 GMT

Ahh, OK I deployed this to get the firmware version information. Looks like I'm running a version less than v4.1.1

            Debug.Print("Systeminfo .Version, .SystemID.Model, OEMString: " +
                SystemInfo.Version + ", " + SystemInfo.SystemID.Model + ", " + SystemInfo.OEMString);

Which displays: "Systeminfo .Version, .SystemID.Model, OEMString: 4.1.0.6, 0, Netduino by Secret Labs LLC"

I'm not liking the display from the test. I previously had DIG and SEG reversed. I've tested with some Arduino code and I can now address each row and column correctly. With the netmf test code I'm now getting close but no cigar yet.

I'll go attempt to upgrade my Netduino firmware. I noticed there are some bug fixes to SPI in the v4.2 release notes.

New Post: Max72197221 ExtendedSpiConfiguration NullReferenceException

fabienroyer — Sat, 04 Aug 2012 20:56:23 GMT

Here's the thing: there's no bug here. ExtendedSpiConfiguration is proven to work on Netduino firmware v4.1.1 and above. Have you checked out the netduino.com forums for any known issues with ExtendedSpiConfiguration on other firmware versions since Secret Labs provides this class?

New Post: Max72197221 ExtendedSpiConfiguration NullReferenceException

jhalbrecht — Sat, 04 Aug 2012 20:46:45 GMT

Would you like me to file a bug report so the constructor in Max72197221 sample will be updated?

From the pastebin you sent me via twitter? http://pastebin.com/9q6zHwev

        public Max72197221(
		Cpu.Pin chipSelect, 
		SPI.SPI_module spiModule = SPI.SPI_module.SPI1,
		uint speedKHz = (uint)10000) {
            var spiConfig = new SPI.Configuration(
                SPI_mod: spiModule,
                ChipSelect_Port: chipSelect,
                ChipSelect_ActiveState: false,
                ChipSelect_SetupTime: 0,
                ChipSelect_HoldTime: 0,
                Clock_IdleState: false,
                Clock_Edge: true,
                Clock_RateKHz: speedKHz);
            Spi = new SPI(spiConfig);
            DigitScanLimitSafety = true;
            SpiBuffer = new ushort[1];
        }

New Post: Max72197221 ExtendedSpiConfiguration NullReferenceException

fabienroyer — Tue, 31 Jul 2012 00:39:57 GMT

Hi Jeff,

You can ditch the extended config and use a regular SPI initialization like this:

        public Max72197221(Cpu.Pin chipSelect, SPI.SPI_module spiModule = SPI.SPI_module.SPI1, uint speedKHz = (uint)10000) {
            var spiConfig = new SPI.Configuration(
                SPI_mod: spiModule,
                ChipSelect_Port: chipSelect,
                ChipSelect_ActiveState: false,
                ChipSelect_SetupTime: 0,
                ChipSelect_HoldTime: 0,
                Clock_IdleState: false,
                Clock_Edge: true,
                Clock_RateKHz: speedKHz);
            Spi = new SPI(spiConfig);
            DigitScanLimitSafety = true;
            SpiBuffer = new ushort[1];
        }

Also, I recommend controlling the power to the Max7219 separately from the Netduino power using a PNP transistor, only powering the Max once your C# application is running. You may want to read this article http://channel9.msdn.com/coding4fun/articles/What-Is-an-Arduino-Shield-and-Why-Should-My-Netduino-Care to discover why that is. Cheers, -Fabien.