[uClinux-dev] Could it possible to port uClinux to 51 based MCU?

[Bobby Clark]

----- Original Message ----- 
From: "Greg Ungerer" <gerg at snapgear.com>
To: "uClinux development list" <uclinux-dev at uclinux.org>
Cc: <uclinux-dev-bounces at uclinux.org>
Sent: Wednesday, February 14, 2007 5:54 PM
Subject: Re: [uClinux-dev] Could it possible to port uClinux to 51 based 
MCU?


> Hi Stevin,
>
> Stevin.Shen at checkpt.com wrote:
>>      a question,   Could it possible to port uClinux to 51 based MCU with 
>> large ram and rom?
>
> You are going to need > 1MB of RAM, can any 51 based MCU's really
> have that much?

Yes, there are 51 varients that have large avalable address spaces.  Many of 
the c compilers support bank switching as well.  I know one company I 
interviewed with that was running about 4MB with a bank switched 51.

>
> Even then you might hit troubles with tool chain, you need a fully
> featured c compiler (preferably gcc), not the "reduced" functionality
> ones common on these little CPU's.

True, this will be the hard part.   I don't know of anything that comes 
close to a full function GCC like compiler for the 51.  I have to do work 
arounds almost any time I want to use the standard libarry with it.

Bobby

>
> But hey, never say impossible. "Very difficult" might be close
> to the mark though.
>
> Regards
> Greg
>
>
>
> ------------------------------------------------------------------------
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