Arietta G25 Has Us Wondering Where ARM Boards Are Going


This tidy little ARM board is the Arietta G25. It’s based around an AT91SAM9G25 which is an ARM9 chip running at 400MHz. Paired with the DDR2 RAM (in 128 or 256 meg options) to the left, the board runs Linux and runs it well. After the break you can see the obligatory running of Doom. But in this case it doesn’t just run a demo, but is playable from momentary push buttons on a breadboard (props to the Arietta team for using wire wrap for that setup).

See the vertical row of pads between the processor and the SD card slot? That’s a breakout header designed to accept a WiFi module. In at €20-30 based on your RAM choice and just €7 for the WiFi module this board is certainly a contender for any embedded Linux projects. But it does have us wondering, should be thinking of these as ARM boards, or forget the low-level development and just think of them as a Linux machines with plenty of GPIO available?

The 20×2 pin header breaks out a lot of the SAM9’s features. We really like the interactive pinout posted for this device. For instance, there are three sets of USB host lines available. But you’ll want to click on each to see that one set is in use for the SD card, and another is used by the WiFi module. The documentation that has been posted for the Arietta G25 is one of its strongest point. Nice work there!

[Thanks Michele]

40 thoughts on “Arietta G25 Has Us Wondering Where ARM Boards Are Going

  1. I a couple of the older, and slightly less featureful, Aria G25s. They are great boards and Acme does a great job of providing support, and accessories for these amazing little boards. The Aria G25 is more suited to production, since it is surface mountable, etc

    The Arietta G25’s are wonderful for hackers, small, easy to interface with, has the built in microSD and optional wifi adaptor. It is great for prototyping wearables, or for adding interactivity where space is limited.

    The only downside is shipping. Since they have to come from Italy, it can be quire ear if you just want one or two units. I am hoping they get a US reseller soon

    1. It looks like the Gumstix boards are about an order of magnitude more expensive to me. Athough they are more powerful, they do not offer dirt cheap lower end models like this, or I am missing something?

      1. that is overly optimistic.

        having a serial console is very useful on any of those boards, no matter what. there is always the time where your usb do not work and you have no lcd header or network parts nearby. or maybe you re having trouble setting up those peripherals.

        1. JTAG debugging is a lot more capable than serial console as it is hardware debugger vs software routines to print messages/monitor program. You can still go in to take a look at the peripherals/stack/memory even when the processor blows up the stacks or crashed. Not having it means you play in a Linux sandbox and not use this board for bare metal work.

  2. Great, I like it. It’s cheap and very small, like a micro controller BUT it’s include a memory management unit, which usual micro controller lacks of.

    I like the idea of programming it on bare metal, with a Forth inspired command line (FICL) interpreter+ usb fat + lwip + rtos, kind of micro os… (it did almost work on the stm32discovery, damned mallocs !)

  3. Once these start to come with a IO controller like the Beaglebone and the IO controller has an easy, documented programming interface we will see the next step. Who wants to be busy waiting in Linux user space while trying to control pins for, say, the DHT22, not me.

          1. So you want one of the newer OMAP chips from TI. OMAP 4 has 2 Cortex M3 cores and OMAP 5 has 2 Cortex M4 cores. Plus their main >1GHz Cortex A9/dual A15 respectively and video cores.
            From what I can find the only devboard with one of those chips is PandaBoard.

  4. strap an atmega chip interface to it and make it easy to use and people will buy it, lots of people want a simple gpio interface from a recognisable OS as well as the baremetal crowd who don’t mind going it alone, not wanting to stir a debate on which chip, arduino IDE is extremely well supported so it would seem like a no brainer (for programming), well documented methods for talking to spi, i2c, etc. and you’re onto a real winner. Then again, strap a decent mcu interface to a quad core arm board and you’re onto a winner too :D

    1. arduino was designed to run on tiny MCUs with miniscule resources, running it on hardware like this is a total waste. arduino has no support for threads or tasks or queues or memory management or even non-blocking APIs so it’s unsuitable for the kinds of applications that this board will support.

      And those “well documented methods for talking to spi, i2c, etc” are brain-dead and unusable in the modern asynchronous programming style that is becoming the norm (see node.js for the RIGHT way to program event handling).

      With the tremendous power available on these modern MCUs, the tendancy to use broken old software models is a big step backwards.

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