> hi, Richard,
>
> thanks for your answer, I have another question for you,
> if I use AT91SAM7x256 with your RTOS from freeRTOS.org, what size of
> footprint is it?
> do I still have room to grow if I add TCP/IP stack and/or USB
> host/device later on?
>
> thanks

Take a look at the FAQ - info is provided for ARM builds.  I have used the 
SAM7X256 with uIP and lwIP, both with a simple USB driver included in the 
build so I don't think size is an issue.


Regards,
Richard.

+ http://www.FreeRTOS.org
+ http://www.SafeRTOS.com
for Cortex-M3, ARM7, ARM9, HCS12, H8S, MSP430
Microblaze, Coldfire, AVR, x86, 8051 & PIC18 * * * * 

jetq88 wrote:
> can AT91SAM7X256 have external flash and DRAM? AT91SAM7X256doesn't
> have EMI(external memory interface) , is it possible to extend
> external flash and DRAM? thanks

If you need external flash and SDRAM, you'd be better off with the 
AT91SAM9260.
(Unless you really need the integrated CAN controller)


-- 
Best Regards,
Ulf Samuelsson
ulf@a-t-m-e-l.com
This message is intended to be my own personal view and it
may or may not be shared by my employer Atmel Nordic AB 

hi, Richard,

thanks for your answer, I have another question for you,
if I use AT91SAM7x256 with your RTOS from freeRTOS.org, what size of
footprint is it?
do I still have room to grow if I add TCP/IP stack and/or USB
host/device later on?

thanks

FreeRTOS.org wrote:
> --
>
> "jetq88" <jetq5188@gmail.com> wrote in message
> news:1159375445.766281.212270@h48g2000cwc.googlegroups.com...
> > can AT91SAM7X256 have external flash and DRAM? AT91SAM7X256doesn't have
> > EMI(external memory interface) , is it possible to extend external
> > flash and DRAM? thanks
>
> The SAM7X does not have an external data bus or address bus as far as I am
> aware so your only options are serial devices for a little more flash, or a
> very slow bit banged interface though an IO port.  Neither of these are any
> good for executing code.  I believe there is an equivalent part that has an
> external bus - why not use that?
>
> Regards,
> Richard.
>
> + http://www.FreeRTOS.org
> + http://www.SafeRTOS.com
> for Cortex-M3, ARM7, ARM9, HCS12, H8S, MSP430
> Microblaze, Coldfire, AVR, x86, 8051 & PIC18 * * * *

-- 

"jetq88" <jetq5188@gmail.com> wrote in message 
news:1159375445.766281.212270@h48g2000cwc.googlegroups.com...
> can AT91SAM7X256 have external flash and DRAM? AT91SAM7X256doesn't have
> EMI(external memory interface) , is it possible to extend external
> flash and DRAM? thanks

The SAM7X does not have an external data bus or address bus as far as I am 
aware so your only options are serial devices for a little more flash, or a 
very slow bit banged interface though an IO port.  Neither of these are any 
good for executing code.  I believe there is an equivalent part that has an 
external bus - why not use that?

Regards,
Richard.

+ http://www.FreeRTOS.org
+ http://www.SafeRTOS.com
for Cortex-M3, ARM7, ARM9, HCS12, H8S, MSP430
Microblaze, Coldfire, AVR, x86, 8051 & PIC18 * * * * 

can AT91SAM7X256 have external flash and DRAM? AT91SAM7X256doesn't have
EMI(external memory interface) , is it possible to extend external
flash and DRAM? thanks