[En-Nut-Discussion] Nut/Net ARM port

[Jesper Hansen]

Don't forget the ASIX 88796 10/100 Mbit device. I've been using that a 
lot. Nut driver for this is also already available. I think there may 
even be one ported to ARM already.

/Jesper

Henrik Maier wrote:
> Hello folks,
> 
> There seems to be a considerable interest in Nut/OS for the ARM 
> architecture.
> 
> And it is readily available for Ethernut 3, based on the AT91R40008 
> ARM7TDMI CPU. Ethernut 3 is well speced with lot's of RAM and Flash and 
> certainly a good successor of Ethernut 1 and Ethernut 2.
> 
> A few people including myself are interested in a small scale ARM7 
> Nut/OS incarnation, featuring the Philips LPC or Atmel AT91SAM CPUs with 
> memory footprints similar to Ethernut 1/2 designs (32 to 64 KByte RAM, 
> 128 KByte to 1 MByte of FlashROM).
> 
> Q1: The question to me is, how much RAM and Flash would be needed for an 
> ARM7 based Nut/OS, featuring similar capabilities/power like Ethernut 1/ 
> Ethernut 2 designs.
> 
> Q2: And then, what would be a good choice for a NIC? Using the RTL8019AS 
> known from Ethernut 1, the LAN91C111 from Ethernut 2, the DM9000E 
> introduced by Ethernut3, the Microchip ENC28J60 or the integrated MAC 
> from AT91SAMX series.
> 
> RTL8019AS pros: Nut/OS driver already available, only needs to be ported 
> from AVR to ARM, reasonably cheap NIC
> RTL8019AS cons: Access timing can be tricky due to missing IOCHRDY 
> signal, 10 MBit only.
> 
> LAN91C111 pros: Nut/OS driver available
> LAN91C111 cons: ?
> 
> ENC28J60 pros: Reasonably cheap NIC
> ENC28J60 cons: power consumption, no Nut/OS driver yet available, 10 
> MBit only
> 
> DM9000E pros: Nut/OS driver available
> DM9000E cons: ?
> 
> AT91SAMX pros: Integrated NIC, DMA access promises high speed transfers 
> according to Atmel's documentation.
> AT91SAMX cons: No Nut/OS driver yet available
> 
> Q3: As there are more people out there, what would be the best approach 
> to share information and collaborate on this topic?
> 
> 
> Henrik Maier
> www.proconx.com
> 
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