Bootloader

[Jason Bourne-2]

Hi Everyone,
 
I just boutgth a AT91SAM7X-EX and I make it rnu the NutOS on it. Now I want a bootloader that use ethernet communication.
I use to work with a AVR ATmega128 and their bootloader and I want something like this in the AT91SAM7X-EX.
Is that possible? For sure it is; I was wondering if you could help or guide how to do that?
 
Thank you
 
Juan
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[Dave Warren]

Hello Juan,

I also have the AT91SAM7X-EX kit and also have an application using the
at91sam7x256 and I wrote my own bootloader. I don't really wish to publish
the complete code to the list but I will give you some hints if you want. I
still use 4.4.0 release, and my dev tool is CrossStudio from Rowley so I
have to do some work to convert makefiles into a CrossStudio project. But
for me the effort is worth it as the debugger and tools are just great
compared to the free ones. It is because I use Rowley that I dont have the
time to convert everthing back and test again rather than any secret reason.

You can contact me direct with questions if you have problems.

Regards

Dave Warren
Luscher UK

----- Original Message -----
From: "Jason Bourne" <jucanpo@...>
To: <en-nut-discussion@...>
Sent: Saturday, February 14, 2009 7:44 PM
Subject: [En-Nut-Discussion] Bootloader



Hi Everyone,

I just boutgth a AT91SAM7X-EX and I make it rnu the NutOS on it. Now I want
a bootloader that use ethernet communication.
I use to work with a AVR ATmega128 and their bootloader and I want something
like this in the AT91SAM7X-EX.
Is that possible? For sure it is; I was wondering if you could help or guide
how to do that?

Thank you

Juan
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[Ole Reinhardt-2]

Hi All,

> I just boutgth a AT91SAM7X-EX and I make it rnu the NutOS on it. Now I want a bootloader that use ethernet communication.
> I use to work with a AVR ATmega128 and their bootloader and I want something like this in the AT91SAM7X-EX.
> Is that possible? For sure it is; I was wondering if you could help or guide how to do that?

I developed a TFTP bootloader for this board some time ago. I'll publish
this bootloader in the next release (or, if I'll be too late) It will go
into the upcomming development version.

If you like I can send you the code as it is in advance.

Regards,

Ole Reinhardt

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[Jason Bourne-2]

Ole,

 

I would appreciate if you could send me the code as it is in advance. Also the procedure if you do not mind.

 

Juan

 

> From: ole.reinhardt@...
> To: en-nut-discussion@...
> Date: Wed, 18 Feb 2009 12:12:53 +0100
> Subject: Re: [En-Nut-Discussion] Bootloader
>
> Hi All,
>
> > I just boutgth a AT91SAM7X-EX and I make it rnu the NutOS on it. Now I want a bootloader that use ethernet communication.
> > I use to work with a AVR ATmega128 and their bootloader and I want something like this in the AT91SAM7X-EX.
> > Is that possible? For sure it is; I was wondering if you could help or guide how to do that?
>
> I developed a TFTP bootloader for this board some time ago. I'll publish
> this bootloader in the next release (or, if I'll be too late) It will go
> into the upcomming development version.
>
> If you like I can send you the code as it is in advance.
>
> Regards,
>
> Ole Reinhardt
>
> --
> _____________________________________________________________
> | |
> | Embedded-IT Hard- und Softwarelösungen |
> | |
> | Ole Reinhardt Tel. / Fax: [phone] |
> | Luisenstraße 29 Mobil: [phone] |
> | 57076 Siegen eMail: ole.reinhardt@... |
> | Germany Web: http://www.embedded-it.de |
> | UstID / VAT: DE198944716 |
> |_____________________________________________________________|
>
> _______________________________________________
> http://lists.egnite.de/mailman/listinfo/en-nut-discussion

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[Jason Bourne-2]

Hi All,

 

I am implementing the Watchdog for the AT91SAM7X but it does not work.

I do not know what am I doing wrong?

 

Thank you

 

Juan

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[uprinz]

Hi Jason!

Im am new to this list, so I might have missed something. But I feel
like it's difficult to help you without seeing any line of code.

For the Watchdog there are only two pieces of code needed. One routine
setting it up to the desired timeout value and enabling it.
Second routine is only a shortcut to retrigger it right in time for the
overlaying software. Call it a macro (like WDT in AVR code).

Often I see code that disables a watchdog also assembled as a function.
For my feeling that is very destructive as this anables a crashed
software to execute this function on error what is exactly what noone
will ever like to see. But it could exist in a macro then it is only
compiled into the code if one really needs and calls it.

Regards,
Ulrich

Jason Bourne wrote:

> Hi All,
>
>  
>
> I am implementing the Watchdog for the AT91SAM7X but it does not work.
>
> I do not know what am I doing wrong?
>
>  
>
> Thank you
>
>  
>
> Juan
>
> _________________________________________________________________
> Windows Live™ Contacts: Organize your contact list.
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[Eric Haver]

On Sat, Mar 7, 2009 at 7:05 AM, Jason Bourne <jucanpo@...> wrote:

>
> Hi All,
>
>
>
> I am implementing the Watchdog for the AT91SAM7X but it does not work.
>
> I do not know what am I doing wrong?
>
>
>
> Thank you
>
>
>
> Juan
>
>

Ola  Juan,The SAM7X does not give you a second chance to program the DOG,
and NutOs "saves us" by disabling it in: crtst91sam7x256_rom.S around line
175

        ldr     r1, =WDT_BASE
        ldr     r0, =WDT_WDDIS
        str     r0, [r1, #WDT_MR_OFF]

Just comment that out and make sure to program the WatchDog within 16
Seconds to the value you want.
         long WDTime ;
         if ((WDTime=NutWatchDogStart(10000l, 0)) == 0)
              printf("Watchdog Problem\n");
         else
              printf("Watchdog set at %ld Seconds\n",WDTime/1000);

         NutWatchDogEnable();

Then feed your dog regularly with:

NutWatchDogRestart();


*E





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[Ethernut]

Eric Haver wrote:

> Ola  Juan,The SAM7X does not give you a second chance to program the DOG,
> and NutOs "saves us" by disabling it in: crtst91sam7x256_rom.S around line

In 4.7.5 beta and the upcoming 4.8, which I'm preparing right now, this
is configurable. Search for NUT_WDT_START in the Configurator.

Harald

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[Coleman Brumley-2]

> Eric Haver wrote:
>
> > Ola  Juan,The SAM7X does not give you a second chance to program the
> DOG,
> > and NutOs "saves us" by disabling it in: crtst91sam7x256_rom.S around
> line
>
> In 4.7.5 beta and the upcoming 4.8, which I'm preparing right now, this
> is configurable. Search for NUT_WDT_START in the Configurator.
>

Is support for the SAM7X WDT built into these upcoming versions?

I keep a patch laying around that adds SAM7X specific code to at91_wdt.c,
watchdog.c, and watchdog.h.  

- Coleman


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[Jason Bourne-2]

It works,

 

Thank you so much

 

Juan
 

> Date: Sat, 7 Mar 2009 08:33:11 -0500
> From: havereric1@...
> To: en-nut-discussion@...
> Subject: Re: [En-Nut-Discussion] Watchdog AT91SAM7X
>
> On Sat, Mar 7, 2009 at 7:05 AM, Jason Bourne <jucanpo@...> wrote:
>
> >
> > Hi All,
> >
> >
> >
> > I am implementing the Watchdog for the AT91SAM7X but it does not work.
> >
> > I do not know what am I doing wrong?
> >
> >
> >
> > Thank you
> >
> >
> >
> > Juan
> >
> >
> Ola Juan,The SAM7X does not give you a second chance to program the DOG,
> and NutOs "saves us" by disabling it in: crtst91sam7x256_rom.S around line
> 175
>
> ldr r1, =WDT_BASE
> ldr r0, =WDT_WDDIS
> str r0, [r1, #WDT_MR_OFF]
>
> Just comment that out and make sure to program the WatchDog within 16
> Seconds to the value you want.
> long WDTime ;
> if ((WDTime=NutWatchDogStart(10000l, 0)) == 0)
> printf("Watchdog Problem\n");
> else
> printf("Watchdog set at %ld Seconds\n",WDTime/1000);
>
> NutWatchDogEnable();
>
> Then feed your dog regularly with:
>
> NutWatchDogRestart();
>
>
> *E
>
>
>
>
>
> _________________________________________________________________
> > Windows Live™ Contacts: Organize your contact list.
> >
> > http://windowslive.com/connect/post/marcusatmicrosoft.spaces.live.com-Blog-cns!503D1D86EBB2B53C!2285.entry?ocid=TXT_TAGLM_WL_UGC_Contacts_032009
> > _______________________________________________
> > http://lists.egnite.de/mailman/listinfo/en-nut-discussion
> >
> _______________________________________________
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[kafka85]

I will appriciate any help from you. I've written simple program that just jump to 4000 location. At this addres I placed program that blinks leds. It works, so I tries to place nutos under 4000 addres. But this time nutos won't start. I changed nutos ld file like this:

MEMORY
{
  rom (rx) : org = 0x000004000, len = 240k
  ram (rw) : org = 0x00200000, len = 64k
}

Any ideas? Or maybe what needs to be done before jumping? how to perform a jump? What to change in nutos?