Date: Mon, 8 Mar 2010 15:24:07 +0100 From: Bernd Walter <ticso@cicely7.cicely.de> To: lists@walkertc.com Cc: freebsd-arm@freebsd.org Subject: Re: Smallest ARM Device for FreeBSD Message-ID: <20100308142407.GY11192@cicely7.cicely.de> In-Reply-To: <000c01cabec4$f8758800$e9609800$@com> References: <000201cabe71$a8f830a0$fae891e0$@com> <6c36ec371003080428p54206f8t9356c999675c0933@mail.gmail.com> <000c01cabec4$f8758800$e9609800$@com>
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On Mon, Mar 08, 2010 at 08:40:52AM -0500, lists@walkertc.com wrote: > This will be a minimal system that really only needs 2 USB or serial inputs > and network connectivity. It will act as a "sensor" - serving to read from > the 2 inputs and relaying that information over the network. > > I'm actually flexible enough to not even have the 2 inputs since shrinking > the system takes a higher priority. It is hard to say without knowing your design limitations about RAM, size, speed, power. My RM9200 boards have 10x10cm, 4 port ethernet switch, 64-128MB RAM and power consumption of 1.5-2.6W. It has a few GPIO - especially the RX/TX of the 4 USART as TTL and an I2C header, but it has only one USB port. There are smaller RM9200 boards with just a single RAM chip, which usually results in lower speed and without a switch. If you want more power and you have access to grid power a sheva plug can also be a nice alternative. On the other hand - I personally often use much smaller ARM7 with an embedded IP stack instead of a full featured FreeBSD system. Those systems can be even smaller since they don't need large SDRAM chips and the controllers are physically smaller as well. > -----Original Message----- > From: batcilla itself [mailto:batcilla@gmail.com] > Sent: Monday, March 08, 2010 7:29 AM > To: lists@walkertc.com > Cc: freebsd-arm@freebsd.org > Subject: Re: Smallest ARM Device for FreeBSD > > Is depends - which features you need? > I believe FreeBSD 8 or -current can be run on most 10x10cm ARM Xscale > boards, but only kernel and very minimal md rootfs. > Also you may need to port some i2c stuff and fix IRQ->GPIO etc. > > //batcill > > > _______________________________________________ > freebsd-arm@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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