xc2rx

Hi Sukasa,

We have looked at making a Netduino 3 Ethernet PoE--but the added cost would put it out of the range of most makers. This is certainly something we could do for commercial customers in volume.
One good alternative I have seen for many maker applications is a PoE splitter.

What are you favorite things about Netduino 3 Wi-Fi?

Chris

Hi Chris,

If you guys do come up with a Netduino 3 with Ethernet, could you not use an EMAC+EPhy chip over SPI with a limitation of just 10Mbps like Netduino Plus 2? Could you guys use either the STM32F407VE or STM32F427VI that comes with a builtin EMAC then add an EPhy using MII/RMII to achieve 100Mbps performance speed? That would be awesome for many of the projects I work on. Let me know what to expect for the Ethernet version if possible.

Just curious why the STM32F427 is clocked at 168MHz when it can achieve 180MHz? That can easily be done in the firmware by setting a couple more registers during the C-bootstrap/start-up code (without any modification to the existing hardware).

In the CC3100 datasheet, http://www.ti.com/li...link/cc3100.pdf, it says that the chip requires an external flash memory IC for its file system storage such as service pack file, system files, configuration files, certificate files, web page files, and user files. In the Netduino 3 Wi-Fi schematic, I do not see any external flash IC connected to the CC3100 IC. How is this possible?

 

If I have to guess, the CC3100's file sytem is probably stored in one of the 2 flash banks of the STM32F427. If that is true, then there must be a software layer running on the STM32F427 emulating an external flash IC supporting the required commands. But that's just a guess, can't really tell unless the firmware source code is revealed.

 

You can read about the external memory requirements on pages 29 - 30 in the datasheet.

 

 

Another question, is the STM32F427 talking to the CC3100 through SPI or UART? In the datasheet, it mentions that SPI can achieve up to 20MHz data transfer speed when UART can only do 3Mbps baud rate max. Giving the fact that the CC3100 can achieve a TCP throughput of up to 13Mbps and UDP up to 16Mbps, it would only make sense to use SPI over UART. In the schematic, I see both SPI host and UART host connected from the CC3100 to the STM32F427. So not sure which interface is really being used unless the firmware source code is revealed.

Hi,

 

Netduino 3 Wi-Fi seems to be a very interesting platform for any IoT projects. However, I checked in the download section and did not find the firmware source code for this platform. I would like to see the firmware source code if I'm going to use this in any professional project. 

 

Also, I haven't received my board yet so it's hard to tell what kind of JTAG header would fit the JTAG pads. Would be great if a part number can be provided. Thanks!!