uClinux on AT91SAM7S256 ??

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ray
Posts: 2
Joined: Thu Jul 20, 2006 1:08 am

uClinux on AT91SAM7S256 ??

Thu Jul 20, 2006 3:21 am

Can you run uClinux on the at91sam7s256 (256k flash, 64k sram)? I need to run uClinux w/ irda support and serial support. IRDA to UART basically. Would this be possible on this micro?

Thanks,
Ray
butler_gaoyh
Posts: 3
Joined: Wed Jun 15, 2005 11:58 am

about uClinux+AT91SAM7X256

Tue Nov 14, 2006 10:08 am

Hi,
i also concern on this topic? do you have get some info from atmel?
sci3d
Contact:
Posts: 18
Joined: Tue Dec 12, 2006 2:35 pm

Thu Dec 14, 2006 4:59 pm

I'm not sure but uClinux is quite large, it is around 900 kb.

Atmel's AT91 series of chips spans a broad range of capabilities, and includes several ARM9 based chips that run uClinux. And uClinux runs on other ARM7-based Atmel chips, such as the AT75Cxxx, in conjunction with 2MB of Flash. However, the Flash-based AT91SAMS series chips have fixed, nonexpandable amounts of RAM and Flash built into them, and those amounts are not especially large for likes of Linux.

The most capacious AT91SAMS chip offers a Flash density of 512KB, and has 64KB of RAM. These memory sizes are quite a ways off the minimum of 1MB ROM and 200KB of RAM stipulated by experts from Rt-Control, the founders of uClinux, in an article published by LinuxDevices.com back in 2000. Using execute-in-place (XIP) could reduce RAM requirements, and eliminating unwanted functions would further reduce memory resource requirements, however.

Please refer to this: http://linuxdevices.com/news/NS8553053411.html
Microcontroller Programming:
http://mcu-programming.blogspot.com
uC - News, Resources and Tutorials

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