I am looking for small embedded ARM board with ethernet+USB+multiple RS232+general purpose parallel I/O lines+multiple channel ADC+realtime clock and capable of running Linux. (Am I sking too much?) Do you know ARM board with these specs?
The new AT91SAM7X comes close, but no Linux. Other OS's however. See
Regards, Richard.
Sorry, wrong link. This link shows the Ethernet and the USB on the SAM7X:
A Gumstix, plus an EtherStix and a Robostix or Audiostix expansion boards would give you everything but the realtime clock. The serial ports are TTL level though, not RS232. The Robostix board has on on-board AVR which provides multiple GPIO and ADC, the Audiostix provides fewer A/D and GPIO but saves you having to write for two platforms (and you get audio - hence the name).
It is small (very small) and runs Linux out of the box.
Tim
embededarm.com - pretty much everything you need. You will need a daughterboard or two.
In article , Don Gravos writes
Why running Linux? Takes up a lot of room and adds a layer of complexity.
Just program the board most embedded systems don't have an RTOS anyway.
How about the VCMA9?
I like the Gumstix, but they only have USB client.
I just ordered a Linkxys NSLU2. While this would still need something else for ADC and GPIO, it has Ethernet and 2 USB ports. It also has 1.5 serial ports (one of them is read only.
And yes, Linux runs on it.
Any idea what the IO levels are ?
Found it in the manual
Alex
You mean uclinux or linux ? How much do you want to spend ?
Usb host or just usb for programming / or usb to serial ?
Otherwise uclinux especially with arm7
Maybe one of the many lpc2xxx based boards
Blackfin stamp US$169
500MHz BF533, 128MB sdram , 4MB flash , 10/100 ethernet but no usb
Oops, just noticed the USB requirement. Yes, the Gumstix folks are taking their time over sorting USB host. It's in the pipeline allegedly, but I'm not holding my breath.
Tim
Different parts of the board have different IO levels; 8 pins are 3.3V; others are 5V. You will need opto-isolators or similar in the real world (but don't you always?) You can also get daughter boards with 5V DIO.
I have one in hand and am building the power supply as we speak. Nice unit, tiny, but I have a bunch of work to do before I start playing with it - need to build a DIN rail mount for it, etc.
Both have Ethernet, USB Host + Client, 2 UARTs (chips got 4) SPI, I2C , GPIO, RTC. No ADC on the mech'brick AFAIK.
There is a growing movement to use one of the wireless routers (like a linksys wrt5x?) which is an arm based Linux with a wireless capability built in. There are also hardware hacks to add serial ports on the web ... and other mods available. This for about $40USD, with power wart, enclosure, antenna and all that ... google is your friend ...
Cheers, Rob.
On Wed, 14 Sep 2005, it was written:
"Don Gravos" a écrit dans le message de news:
4326f0ab$0$22099$ snipped-for-privacy@news.optusnet.com.au...CM-X255 or CM-X270W from Compulab, starting around $50 ? Cf
Do they run Linux?
Yes, but that $50 is a bogus price, it's a few thousand dollars to get set up and the $50 is only for a mini module that requires a baseboard to get any actual functionality.
For full linux
Etrax from Axis
The ETRAX 100LX Multi Chip Module includes the ETRAX 100LX SoC plus 4 MB Flash, 16 MB SDRAM, Ethernet Transceiver, etc. This chip is ideal for Ethernet-connected Linux systems.
Alex
I had a look at axis a little while back but I couldn't find any info on the MIPS rating. Also I found that the 10/100 Ethernet is slugged to a max
2 (or 2.5) MB/s. Somthing to do with the USB interface.Regards Sergio Masci
"larwe" a écrit dans le message de news: snipped-for-privacy@g49g2000cwa.googlegroups.com...
A little correction : they are effectively starting arount $50 in volume orders (1K), see their prices on their web site. These kind of modules are COM, meaninf effectively that they are designed to be fitted, like a component, on your application PCB. So yes a baseboard is needed, but it could be either a standard one (PC104 or ATX, around $30-$40), or your own application PCB.
Friendly, Robert
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