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Building my own custom Netduino Plus 2 hardware

Plus 2 hardware custom

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#1 AxelG

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Posted 18 March 2013 - 07:01 PM

I have been asked to help with a project to build a device based on the Netduino framework and the STM32F405 family of processors.

 

We expect to use the same processor as the Plus 2, but leave off the ethernet hardware (we need the flash, not the ethernet)  There is also a possibility of going to a larger package in the future to expose more peripherals; like a CAN bus.

 

I have two questions for anyone with experience building their own device.

 

1) For the first revision I would like to avoid having to recompile the ND firmware and just flash the current build to the new device.  Is there any problem flashing the ND 4.2 build on a chip that has not implemented the ethernet hardware?

 

2) I would like to get a second set of eyes on the schematics before I build a prototype board. Is there someone interested in reading the schematic to catch my mistakes?



#2 JerseyTechGuy

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Posted 18 March 2013 - 07:56 PM

1) The Standard Netduino 2 (not the Plus) does not have Ethernet. Simply use the Firmware from the Standard Netduino.  Even if you use the Ethernet Based Firmware version it shouldn't matter.  It simply won't find the Ethernet.

 

Have you looked at the cost factor of building your own boards?  I looked into this for our commercial product and there was no way we could have made a Netduino Copy for less that buying the real Netduino so our product will simply be powered by Netduino.



#3 AxelG

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Posted 18 March 2013 - 09:56 PM

Dave:

Thanks for the reply.  We did, and actually still are considering that option. Longer term we want to use the larger 100 pin STM chip to take advantage of extra IO.

 

We also wanted the first generation to tap into SPI3 for the onboard SD card: but I can always mount the SD on SPI1 with ND2.

 

One factor is having a real-time CAN bus capturing OBD data.  Still have not decided on the best approach; but it would be nice not having to add a lot of hardware to do that.

 

Cost is not the only factor; total size is also a design factor, which is why we jettisoned the Ethernet.  There are several add-on devices needed to fit into a total footprint < 3" X 3"

 

As always, thanks for the insight!



#4 JerseyTechGuy

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Posted 18 March 2013 - 10:01 PM

Makes lots of sense.  One of my Spring projects is OBDII.... I purchased a OBD shield and plan on some mods for my 2011 Dodge Challenger SRT8.  Trying to do some stuff that stands out at the car shows and custom seemed to be the best way to go.



#5 AxelG

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Posted 19 March 2013 - 07:07 AM

lol, doing the same with my 2012 Hemi Charger....


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#6 NeonMika / Markus VV.

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Posted 19 March 2013 - 06:13 PM

Sorry, can't help out with any tips thou I'm only a hobby person in electronics.

But I find it kind of funny how you talk about cars. I'm having a Renault 5 from 1989 and always thought about putting some "freakyness" in it with my netduino :D


NeonMika.Webserver
> Control your N+ and write webservice methods easyily
> Receive data from you N+ (in XML or JSON)
> Browse the SD on your N+ directly in the browser and d
own - and upload files

 

If you need help with NeonMika.Webserver, please just leave a note in the thread and/or contact me via Skype :)

 

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#7 JerseyTechGuy

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Posted 19 March 2013 - 06:46 PM

lol, doing the same with my 2012 Hemi Charger....

 

So Cool!







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