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Discussion Groups | AT91SAM ARM | uClinux port for at91sam7se512
For users of the Atmel AT91SAM7 and AT91SAM9 ARM CPU chips. Atmel has taken a new direction by combining on chip flash and ram with the ARM CPU on a single die. This provides low cost devices for small systems using the ARM CPU. This group is to exchange information to help users get started and learn how to use the devices.
uClinux port for at91sam7se512 - zahiddreamz_2004 - Jun 17 16:42:36 2009
Hi All,
I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. But still unable to find the success. I have some porting experience with Linux kernel onto AT91SAM9263-EK board. I have read from portal regarding porting uClinux on to SAM7 series. In that portal he asked us to the existing support for ARM7TDMI controller(AT91x40). I found that portal was fine because my ARM core is of ARM7TDMI. And I also made some low level changes for debug port to see Debug messages in the file debug-macro.S.
Plzzz any one give suggestion how to proceed in it. Also, does this uClinux boots without any boot loader or it needs some bootloader for initial initilization.
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. But still unable to find the success. I have some porting experience with Linux kernel onto AT91SAM9263-EK board. I have read from portal regarding porting uClinux on to SAM7 series. In that portal he asked us to the existing support for ARM7TDMI controller(AT91x40). I found that portal was fine because my ARM core is of ARM7TDMI. And I also made some low level changes for debug port to see Debug messages in the file debug-macro.S.
Plzzz any one give suggestion how to proceed in it. Also, does this uClinux boots without any boot loader or it needs some bootloader for initial initilization.
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Re: uClinux port for at91sam7se512 - "jec...@ymail.com" - Jun 17 23:38:17 2009
I have the same question ,if you have any successful port , please
give me a copy ! :-)
And i had run uc/os in the ek board =A3=A1 if you have any intrest in=20
us/os you can see this web site:
http://www.micrium.com/atmel/AT91SAM7.html
regards...
_____________________
Je Chern
--- In A...@yahoogroups.com, "zahiddreamz_2004" wrote:
>
> Hi All,
>=20
> I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. Bu=
t still unable to find the success. I have some porting experience with Lin=
ux kernel onto AT91SAM9263-EK board. I have read from portal regarding port=
ing uClinux on to SAM7 series. In that portal he asked us to the existing s=
upport for ARM7TDMI controller(AT91x40). I found that portal was fine becau=
se my ARM core is of ARM7TDMI. And I also made some low level changes for d=
ebug port to see Debug messages in the file debug-macro.S.
>=20
> Plzzz any one give suggestion how to proceed in it. Also, does this uClin=
ux boots without any boot loader or it needs some bootloader for initial in=
itilization.
>
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
give me a copy ! :-)
And i had run uc/os in the ek board =A3=A1 if you have any intrest in=20
us/os you can see this web site:
http://www.micrium.com/atmel/AT91SAM7.html
regards...
_____________________
Je Chern
--- In A...@yahoogroups.com, "zahiddreamz_2004"
>
> Hi All,
>=20
> I have an ATMEL SAM7SE512 EK board. I am trying to port uClinux on it. Bu=
t still unable to find the success. I have some porting experience with Lin=
ux kernel onto AT91SAM9263-EK board. I have read from portal regarding port=
ing uClinux on to SAM7 series. In that portal he asked us to the existing s=
upport for ARM7TDMI controller(AT91x40). I found that portal was fine becau=
se my ARM core is of ARM7TDMI. And I also made some low level changes for d=
ebug port to see Debug messages in the file debug-macro.S.
>=20
> Plzzz any one give suggestion how to proceed in it. Also, does this uClin=
ux boots without any boot loader or it needs some bootloader for initial in=
itilization.
>
------------------------------------
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
Re: Re: uClinux port for at91sam7se512 - micr...@virginbroadband.com.au - Jun 21 22:15:49 2009
>> Plzzz any one give suggestion how to proceed in it. Also, does this
>> uClinux boots without any boot loader or it needs some bootloader for
>> initial initilization.
I haven't looked close enough at uCLinux, but the need for a bootloader is
really dictated by the HW, not necessarily the SW
or OS, be it Linux or whatever.
A typical cost effective solution for Linux is to use NandFlash to store
the OS files. Since these are 8 bit I/O port devices, you can't boot off
that.
With a memory management system (which ARM7 isn't) you need 2 levels of
bootloader. One to set up access to the serial bootloader
(normally built in in ROM) and then one to copy the Linux image from typ.
SPI DataFlash, decompress and store in RAM.
Then the 2nd bootloader jumps to the address in RAM where the uImage is
stored and starts up Linux.
So, if I understand this correctly, I don't see any reason why uCLinux
running on ARM7 shouldn't be able to execute straight off internal/external
Flash memory. As long as there is some default access of program memory for
the startup code to get executing with.
HTH
Kris
On Thu, 18 Jun 2009 03:36:35 -0000, "j...@ymail.com"
wrote:
> I have the same question ,if you have any successful port , please
> give me a copy ! :-)
------------------------------------
______________________________
controlSUITE™ software. Comprehensive. Intuitive. Optimized.
Real-world software for real-time control. Details Here!
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )
>> uClinux boots without any boot loader or it needs some bootloader for
>> initial initilization.
I haven't looked close enough at uCLinux, but the need for a bootloader is
really dictated by the HW, not necessarily the SW
or OS, be it Linux or whatever.
A typical cost effective solution for Linux is to use NandFlash to store
the OS files. Since these are 8 bit I/O port devices, you can't boot off
that.
With a memory management system (which ARM7 isn't) you need 2 levels of
bootloader. One to set up access to the serial bootloader
(normally built in in ROM) and then one to copy the Linux image from typ.
SPI DataFlash, decompress and store in RAM.
Then the 2nd bootloader jumps to the address in RAM where the uImage is
stored and starts up Linux.
So, if I understand this correctly, I don't see any reason why uCLinux
running on ARM7 shouldn't be able to execute straight off internal/external
Flash memory. As long as there is some default access of program memory for
the startup code to get executing with.
HTH
Kris
On Thu, 18 Jun 2009 03:36:35 -0000, "j...@ymail.com"
wrote:
> I have the same question ,if you have any successful port , please
> give me a copy ! :-)
------------------------------------
______________________________
controlSUITE™ software. Comprehensive. Intuitive. Optimized.
Real-world software for real-time control. Details Here!
(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )