Hello, I just receive my netduino today in France, I'm very happy I ordered on August 5 at Proto Advantage, only 6 days to receive it, and only 5$ for shipping, So don't hesitate even if you live in Europe, Enjoy, Pascal

Why the ARM compiler provided with Embedded Compact 7 is not supported by .NET MF ? There is certainly a good reason, Just curious, Pascal

I had a problem with start debugging in Visual Studio 2010....Vs didn't connect to the board.
I have tried to upgrade firmware on Netduino but the MFDeploy blocking on "Connecting to TinyCLR...".
So I have disconnected my Netduino board....
Now when I insert Netduino in USB port I get the following message on my status bar :

USB device not recognized

I have uninstalled and installed the Netduino SDk but it doesn' work !
I can't connected to the board with MFDeploy !

Help !!!
Paolo.

Don't worry

You probably need to reflash the firmware. Here the step-by-Step procedure to do it http://forums.netdui...e-does-not-fix/

Pascal

I´m planning build Netduino from scratch (board, solder)
I have a question.
How to burn firmware in processor?
Thanks

If you realy want to start from strach (good luck to solder the MCU ), you need to use SAM-BA tools from ATMEL to burn the TinyBooterDecompressor.bin first :
http://www.atmel.com...sp?tool_id=3883

After, you can use MFDeploy to burn the firmware,

Good luck,
Pascal

I've just found out that by default the netduino plus is responding to icmp(ping) requests..

Is this the only default behaviour of the network stack? or are there more services that run?
And.. can I disable this behaviour?

This is the default of all ip stack without firewall. This is true for any kind of network product.
Why you want to disable it ?

Pascal

Hi pascal06,

Whenever we do large amounts of code, we use the Atmel AT91SAM7X-EK (the Atmel dev board), placing an AT91SAM7X512-AU chip on it. We've specifically made the Netduino firmware compatible with the EK board so that it's possible to use the Netduino firmware with it... [You might have to tweak SPI channels or cut traces for the SD to work--but that's about it].

We haven't tried to build code within an emulator--but technically .NET MF has a Windows port (used in the .NET MF Emulator) so it might be possible...

Chris

After some research, it seems that the Emulator works only with managed code. So, it's great to simulate C# project, but it seems that not possible to use any firmeware (native code) with it,

Pascal

Hello, To simplify developing and debuging of some piece of firmware, I imagine to use the emulator. Due to very constrained environement, the price of RVDS, the size of code generated by GNU G++ and the size of debug information, it would be great if I can write/test/debug my native code with emulator before. As a example, for a IP stack , instead of using socket level with emulator, is it possible to strip this part, write a driver for WinpCap, and work on code between socket assembly and this driver with emulator ? Anyone have experience on this ? Any comments appreciate, Pascal

Perhaps you're already on this road, but when the getting started guide comes out, if it could be in a wiki or some other community-editable format, that would be great. If you need a suggestion for wiki software, I like the Screwturn wiki, it's very simple, open source, and .net based.

Full disclosure: I'm listed as a contributor to the Screwturn project, but my contributions were more by accident than intentional...

+1 for a Netduino Wiki
+1 for Screwturn, very efficient

Pascal

Hello, It seems that AT91SAM7X512 have a embedded ETHERNET capability, Do you plan to make it available ? Best regards, Pascal

I have downloaded the zip file of the Netduino board. The file type is .BRD and I would like to know how
to open this file. I tried to use Eagle with no luck.

Any enlightenment will be appreciated.

Vic

Hello Vic,

Here is a answer from Chris:
http://forums.netdui...rd-layout-file/

Pascal

Hello, What kind of hardware/software do we need to be able to debug firmware using VS like this: Pascal

In theory yes,

You need to check if a shields doesn't use the same pin as another ... Look at schematic of each shield,
And some shield are designed to be the last shield, like lcd,

Chris is the winner,

Pascal

I have the same experience, I can see the first ARP request, but no retry (after waiting 30 minutes ). A IP stack must retry after a timeout, and after multiple requests it must generate a exception. And it's not the case, like a infinite timeout after the first request. It's probably a bug. Pascal

Thanks for your answer, Have a nice day, Pascal

Hello, I'm waiting for my Netduino Congratulation for this incredible product !!! I try to load the board layout file from the latest eagle program without success -> invalid file. Perhaps I'm wrong, it's not a eagle file ? Thanks again for this product, Kind regards, Pascal (France)

I found this circuit simulator and thought some of you might be able to prototype with it....
http://www.falstad.com/circuit/

Tell me if you like it

Definitly userful to learn electronic ... Yes, I like it ...

A dream can be a netduino emulator with this circuit simulator

Excellent, thanks for sharing, Here is a idea for a futur version: http://www.glacialwa...robotics/?p=325 /pascal

That's odd that the joystick wouldn't work. Right on the schematic at

http://www.nuelectro...ia_3310_lcd.pdf

it says

"VCC - 3.3V - 5V
All ligic I/O compatible with
5V & 3.3V logic level"

The joystick use 5v and voltage divider using resistances (a solution to not use one pin per direction). So, in fact, I can use some of direction (like up/down ..) but not all. Just because the voltage on AD0 is more than 3.3v in some situation. Without pushing any direction, AD0 return 1023 and also when I push right direction. The most important is, without any push, the AD0 is connected to 5v with a 2K resistance. Is it risky ?

/pascal

Hello, I successfully use this LCD http://www.nuelectro...&products_id=12 on Netduino using SPI. I will share the library in a few days. I just need to clean my code. All works fine, except the joystick. Because it powered by 5v Now, I will try to use Ethernet Shield http://www.nuelectro...&products_id=4. It seems that we don't have any issue regarding power. But, before starting, I just want to clarify what's the best way to start. Do I need to use PK to create/use the driver ? I think yes if I want to use lwIP, right ? It's not possible to write a driver in C# and use it at this level. Pascal

It appears that the board is driving 5V to the joystick for analog input--and the schematic's quote of 3.3V/5V compatiblity is for the "logic I/O" (screen, etc.) only.

Can you move the VCC for the joystick to the 3.3V pin easily? Do they have a board with a joystick ADC at 3.3V?

Chris

Thanks,

No on both questions. But I can replicate the same schema outside the shield with another analogue pin.

What about enc28j60 ? what's your advice,

/pascal

From the AT91SAM7X512 datasheet:
One Two-wire Interface (TWI)
– Master Mode Support Only, All Two-wire Atmel EEPROMs and I2C Compatible Devices Supported

A driver for SPI slave mode could be written, but I2C slave would require a "bit banged driver."

Chris

Thanks for that clarification ...

Pascal

The I2C on the ARM7X chip is master-only. We'll see what we can do on speeding up Ethernet support...

Chris

I2C master-only is a limitation of ARM7X or .NET micro framework ?
Perhaps I'm wrong, but when I read the datasheet, it's seems that the ATMEL used on netduino support both mode, no ?

Pascal

3 or more you've got a couple choices - you can use I2C to do it and give each a different address or you can use ethernet.

Personally, as a network engineer I'd say ethernet but there aren't any ethernet drivers for the netduino (yet!).

+1 for Ethernet.
It's seems that I2C .net MF implementation (like SPI) is always master. So, we cannot use I2C to cummunicate between 2 Netduino(s). Or we need to write another driver.
And I2C is very slow for that distance.

Pascal

Hello, I use multiple shield with my Arduino, and before trying to plug any shield on my netduino, I would like to be sure that's not dangerous regarding TTL level : http://www.nuelectro...&products_id=20 http://www.nuelectro...&products_id=12 http://www.nuelectro...1&products_id=2 http://www.nuelectro...1&products_id=4 In general, what's happen if I plug a shield designed for Arduino (TTL 5v) to netduino ? Is it dangerous or it simply doesn't work ? Sorry for this basic electronic question, but I'm a software guy, need to stay humble with electronic, /pascal

The Netduino's digital pins output 3.3V signals, but inputs from shields can be up to 5V. Analog pins in analog mode need to stay at <=3.3V.

Pretty much all of the Arduino shields should work electrically, with the following two exceptions:
1. If the shield provides 5V analog inputs, you'd need to modify it to provide 3.3V analog inputs instead.
2. If the shield requires 5V data signals, you'd need to put a level converter in between the Netduino and the shield.
3. Netduino has 4 hardware PWM (vs. 6 PWM on the Arduino's AVR chip). We may have "software PWM" in the future, but for now you might lose a small bit of functionality on certain motor control shields.

That's it. Netduino provides 5.0V and 3.3V power just like Arduino. Many/most shields should work. We're compiling a list and will put it on an upcoming Netduino "accessories" page.

Does that help?

Chris

Many thanks Chris,


In conclusion, only analog input is risky. But is it realy dangerous for netduino or not ?

/pascal