Chris Walker's Content

#63039 Powering Netduino using micro USB charger?

Posted by Chris Walker on 03 June 2015 - 09:42 PM in Netduino 3

Hi Frode,

No worries, better safe (asking questions) than sorry (wishing you had later)...

USB chargers have to conform to the same USB power specs as computer USB ports. That's one of the beauties about USB. So as long as it's a good USB charger, you're good to go!

You can also power your Netduino using its USB jack from any 5V regulated source that's rated for 500mA.

Chris

#61247 Analog Pins connected to each other

Posted by Chris Walker on 14 January 2015 - 07:26 AM in General Discussion

Hi xmen,

If you connect two pins together to the same input source, they'll both see the same input (whether that's voltage or digital high/low state). And if you set one as an output pin and one as an input pin, the input pin will see the output pin's state.

The main thing to be careful about when connecting pins together is to make sure you don't set both of them as outputs.

Chris

#61496 sd card mounting twice n+2 4.3.1

Posted by Chris Walker on 03 February 2015 - 11:05 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi Steve,

That's a curious/odd issue. It sounds like there might be some "bouncing" of the SD insert pin when you insert the card.

Is this causing a non-workaround-able issue in your code? We can ping the NETMF team or look into adding software debouncing in 4.3.2 if it's a blocking issue.

Chris

#63317 netduino 3 absorption

Posted by Chris Walker on 30 June 2015 - 06:51 PM in Netduino 3

Hi Alex,

Can I know real absorption of netduino 3 with while wifi is been working ?

Netduino 3 Wi-Fi uses the TI CC3100 radio module. We don't have specific SAR data for the CC3100MOD module, but this is probably something you could get from TI.

Chris

#62282 Netduino 1 has a new price: $19.95

Posted by Chris Walker on 29 April 2015 - 05:47 PM in General Discussion

One more bit of cool news, to go with this week's other Netduino announcements...

Netduino 1 is now just $19.95. Limited supply.

http://www.amazon.co...=A15S1YSPRYIXOQ

Chris

#62283 Netduino 1 has a new price: $19.95

Posted by Chris Walker on 29 April 2015 - 05:49 PM in General Discussion

P.S. For commercial customers: Netduino 1 will continue to be available for on-demand production.

[As this last-generation product is now out of mass production, pricing will be based on order quantity. Contact us or Mouser for more details.]

#60878 Netduino 2+ Stock

Posted by Chris Walker on 06 December 2014 - 12:33 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi dneault,

PM me and I'll make sure we get you some Netduino Plus 2s.

So sorry for the stock shortages.

We've ramped up production these last few weeks so hopefully the shortages will clear up shortly.

Welcome to the Netduino community,

Chris

#63157 Can the Shield Base be used with Netduino 3 for extra I/O

Posted by Chris Walker on 15 June 2015 - 07:09 PM in Netduino 3

Hi stikyy,

Netduino 3 supports all the non-beta modules. It should also support Shield Base in the future, once Shield Base comes out of beta. That's a little way off still though; for GoBus, we're focused on shipping the new STM8S-based modules (serial pack and sensor pack) right now.

There are some I2C and SPI-based GPIO expanders out there, if you need a few more IOs...but those won't be virtualized like Shield Base.

Welcome to the Netduino community,

Chris

#61852 Trouble finding pins,gpio

Posted by Chris Walker on 12 March 2015 - 08:37 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi philrem,

Did you create a Netduino Plus 2 Application (from the project templates) to start your project?

If not, no worries. You can add the "SecretLabs.NETMF.Hardware.Netduino.dll" assembly via project references. Then just add the following line of code up top:

using SecretLabs.NETMF.Hardware.Netduino;

The Pins. enumeration is a member of this class.

Does that get you up and running?

Welcome to the Netduino community,

Chris

#63083 Netduino 3 with Eye-Fi or other wifi enabled SD card

Posted by Chris Walker on 09 June 2015 - 12:04 AM in Netduino 3

Hi henslecd,

If the Wifi enabled SD card has a public API that you can use to grab data over the network, it might be a good candidate.

If the SD card uses proprietary "wireless SD card drivers" on your PC...that's not going to work without corresponding drivers for NETMF.

Chris

#63019 amount of code storage and ram memory

Posted by Chris Walker on 02 June 2015 - 05:48 PM in Netduino 3

Hi JoopC,

The flash and RAM are hardware features of the MCU, so there's no way to change those...although we may be able to find ways to free up even more RAM with future versions of NETMF/Netduino firmware.

Chris

#60688 Network Config. Won't Save

Posted by Chris Walker on 11 November 2014 - 11:22 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi aahlbrandt,

Can you try erasing and reflashing your board with Netduino Update really quickly (which is included with the firmware update files...see sticky post at the top of the forum)?

And then change the network config?

Welcome to the Netduino community,

Chris

#63164 viewing .brd files

Posted by Chris Walker on 15 June 2015 - 11:53 PM in General Discussion

Hi Eric,

For the mainboards, grab a free copy of the Cadence Allegro viewer.
http://www.cadence.c.../Downloads.aspx

Chris

#62619 Configure ADC DMA

Posted by Chris Walker on 12 May 2015 - 03:31 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi rgavrilov,

There's no API for this today, but if the STM32 supports it and there's enough demand we could put this on the feature request list for a future SDK release...

That would be a pretty cool thing to do.

Chris

#60847 Netduino Plus 2 Power On No Networking

Posted by Chris Walker on 03 December 2014 - 05:07 AM in Netduino Plus 2 (and Netduino Plus 1)

Hi Doug,

On #2...if you do RebootDevice(true) does that work for you?

It sounds like the network router may not like the super-fast disconnect? When you say that the network does not come up, what is happening exactly? Also...does it happen with both DHCP and Static IP?

Welcome to the Netduino community,

Chris

#62732 Netduino 3 HEADER HDR100IMPXXF-G-V-TH-BLUE for own SHIELD creation

Posted by Chris Walker on 18 May 2015 - 07:33 PM in Netduino 3

Hi joachimheine,

Welcome to the community! And you have your own shield already...so fast!

We don't have "Netduino shield headers" available, but you can pick up regular headers from SparkFun and some other resellers.
http://www.sparkfun.com/products/11417

The shield headers are male (and in this case with skinnier long tails) rather than female like on the mainboards.

Does that get you on the right path?

Chris

#62495 Several IoT events for those interested.

Posted by Chris Walker on 06 May 2015 - 11:35 PM in General Discussion

Wishing I were hanging out with you guys in the Netherlands... Thanks for sharing these, Beastyboy.

#61419 Threading in Netduino2

Posted by Chris Walker on 31 January 2015 - 09:22 AM in General Discussion

Hi xmen,

Try to keep threads asleep unless they are actively doing something.

Do you have any "spinning loops" occupying 100% of MCU?

Chris

#61451 Threading in Netduino2

Posted by Chris Walker on 02 February 2015 - 02:41 PM in General Discussion

Hi xmen,

Do you only have two threads running (main, sleeping...and the I2C thread)?

In theory both threads should have the same priority.

In the end...do what works well. But if you're seeing strange behavior and we can reproduce it consistently, let's pull Microsoft into the conversation for a potential NETMF vNext performance boost.

Chris

#61371 5 volt though USB or VIN or Barrel

Posted by Chris Walker on 25 January 2015 - 07:38 PM in Netduino Plus 2 (and Netduino Plus 1)

HI mbargar13,

VIN is designed for 7.5-9.0V input on Netduino Plus 2. There's a reverse-voltage-protection diode that drops about half a volt...and then a 5V LDO that drops a little bit of voltage as well. Seeing a 1V+ drop from VIN to 5V is normal. [Your board may still work, however...since it runs at 3.3V...although the white/blue LEDs may be extinguished or dim.]

The VBUS line (~5V) of the USB port is forwarded straight through to the 5V subsystem of the board, so plugging in 5V'ish regulated power there is the better way to hook up a ~5V DC supply.

Chris

#62955 How many clients that NT3 can take?

Posted by Chris Walker on 28 May 2015 - 06:14 AM in Netduino 3

Hi Rio,

The CC3100 module can handle 8 simultaneous unsecure sockets plus 2 simultaneous secure sockets.

For launch, we are limiting the number of sockets to the CC3100's built-in limit. If we pushed the hybrid Netduino.IP stack aside and ran the full Netduino.IP stack, you could in theory get many dozens of sockets.

All that said: the reality is that NETMF is designed for low-power devices where you might be connected to a few things at once. It really isn't designed to power high-speed routers or act as a mega web server, etc.

BTW, welcome to the Netduino community!

Chris

#62236 Interrupt on ADC conversion complete?

Posted by Chris Walker on 23 April 2015 - 04:38 PM in General Discussion

Hi Andy,

Behind the scenes, reading an AnalogInput's value via AnalogInput.Read() triggers an ADC conversion, waits for the conversion to complete, and then returns the result to your code.

I know that isn't exactly what you were asking, but does that answer your question?

Welcome to the Netduino community,

Chris

#62316 Support for older firmware versions

Posted by Chris Walker on 30 April 2015 - 06:49 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi Mike,

Is this for a Netduino 2 or a Netduino Plus 2?

NETMF 4.3.0 was pre-release-only. NETMF 4.3.1 was effectively the "release" version of firmware.

Here is the 4.3.0 beta 1 firmware for Netduino 2:
http://forums.netdui...re-v430-beta-1/

I highly recommend moving to the 4.3.1 or 4.3.2 firmware. The big thing you need to do is uninstall the NETMF 4.3 ("pre-release") SDK and install the newer NETMF 4.3 QFE2 (release-quality) SDK.

Does that get you on the right path?

Chris

#63652 Netduino Wifi DAQ server with hardware driven adc

Posted by Chris Walker on 24 July 2015 - 11:43 PM in Netduino 3

Hi Lou,

Generally speaking, NETMF abstracts away the MCU registers--instead giving you a unified IO object model that works across lots of different families of microcontrollers.

You can certainly add in some native code functionality in the NETMF source itself (with interop classes, HAL, etc.) but this isn't something you can do today (ADC sampling with DMA, etc.) from managed code.

As Llilum progresses, we may be able to support some scenarios along these lines from C#...but that project is a proof of concept at this point.

Chris

#60612 Netduino 2 Plus - RTC and battery

Posted by Chris Walker on 03 November 2014 - 03:15 PM in Netduino Plus 2 (and Netduino Plus 1)

Hi Dmitry,

The STM32's VBAT is not exposed on Netduino 2. You could add on an RTC externally and of course you could add RTC support on a custom board with some firmware tweaks.

Does that help get you started?

Welcome to the Netduino community,

Chris