Further question on the IAP application note

[quentin239955]

Posted on May 02, 2007 at 12:31

Further question on the IAP application note

[quentin239955]

Posted on April 30, 2007 at 14:37

Hi,

I had problem last week to compile the AN2078 IAP. Now it compile ok but I have trouble to adapt it to my application/hardware.

Here's my questions

1) In the AN2078 documentation, on page 3 there is noted that for the STR71x the code should take 7.2KByte. Compiled in release mode, my AXF file is 32.6 Kbytes. Is this normal ?

2) When I want to program my application from the IAP, should I use the AXF of my application program (and juste modify the load region in the scatter file?)

thanks in advance

[quentin239955]

Posted on May 01, 2007 at 07:32

maybe some information about my case could help someone in helping me :-]

So currently, the IAP is booting ok on my hardware, I see the menu in hyperterminal. It seem that the flashing is ok, I can send file like explained in the documentation, but after the transfer there is some garbage in hyperterminal (after the downlad) :

Code:

Programming Completed Successfully!

--------------------------------

Name: debug.axf

Size: 102724 B================

DownloadJµ…â€¢To the STR71x Internal Flash ---------- 1

Execute The New Program ------------------------------ 2

After that, I can't run my program. The strange thing is that if I shutdown and restart my device, the IAP don't run anymore. So I suspect that I have messed up something with my modifications to make it run on my hardware.

As I said in my first post, the IAP axf file is about 32kb, but when I program it with the JTAG, it show that he program only the two first sector (0&1) of the bank 0. So I have modified the IAP to flash my program on the beginning of the third sector of bank 0 (0x40004000).

I have modified my application scatterfile like this :

Code:

USER_MODE 0x40004000 0x30000

{

FLASH 0x40004000

{

71x_init.o (Init, +First)

* (+RO)

}

RAM 0x00000000

{

71x_vect.o (Vect, +First)

* (+RW)

* (+ZI)

}

}

And modified 71x_init.s to do ram remapping.

If something writen above sound for you like an heresy, please put me on the right way ;)

[najoua]

Posted on May 02, 2007 at 07:16

Hello tumnao,

In the IAP driver provided by ST, the user application will be loaded beginning from Bank0 sector1 base address. Before loading the application, a check of its size is done in the routine FLASH_SectorMask() in common.c source file (this routine is called in ymodem.c in Ymodem_Receive() routine):

if user_application size < 8kbytes --> sector1 will be erased

if user_application size < 16kbytes --> sectors 1 and 2 will be erased

if user application size < 24kbytes --> sectors 1, 2 and 3 will be erased

etc...

In your case, the IAP is located in Sectors 0&1 so sector1 shouldn't be erased.

So, the routine FLASH_SectorMask() in common.c source file should be updated as follow:

u32 FLASH_SectorMask(vu32 Size)

{

if (Size <= 0x2000)

return 0x4 // instead of return 0x2;

if (Size <= 0x4000)

return 0xC // instead of return 0x6;

if (Size <= 0x6000)

return 0x1C // instead of return 0xE;

if (Size <= 0xE000)

return 0x3C // instead of return 0x1E;

if (Size <= 0x1E000)

return 0x7C // instead of return 0x3E;

if (Size <= 0x2E000)

return 0xFC // instead return 0x7E;

//if (Size <= 0x3E000) this case is no longer valid because the user application size shouldn't exceed 256 - 16kbytes = 240kbytes.

//return 0xFE;

return 0;

}

You said ''The strange thing is that if I shutdown and restart my device, the IAP don't run anymore'' --> the IAP driver can be re-executed under a specific condition at RESET. This condition is a Low level on P1.8 pin. For more details, please refer to AN2078, the section 2.2 Triggering execution of the IAP driver, page 5.

Hope this helps you,

Best regards,

Najoua.

[quentin239955]

Posted on May 02, 2007 at 10:47

Many thanks Najoua, you where right.

This explain me why my IAP didn't work after a programming, he was erasing himself...

And since my last post I also found answer to some of my question by activating the size report in the linker message option... My program is smaller that i thinked :)

And I also found the fromelf tool. By reading the RVDK linker guide I suspect that I need to convert my AXF to bin with it.

Still no working IAP, but closer than never :-]

[najoua]

Posted on May 02, 2007 at 11:23

Just another point: in common.h header file, don't forget to replace the '' #define ApplicationAddress 0x40002000'' with ''#define ApplicationAddress 0x40004000 '' which corresponds to the user application location.

Good luck tumnao.

[quentin239955]

Posted on May 02, 2007 at 12:31

Yeah, I didn't forget to do that, and after reading the fromelf doc, IAP is working ! :-]

My last problem is about interruption so I must have messed something up in the ram remapping process.

But this is a big step for me, as this is my first embedded project I have a lot to learn and each new working functionnality make me really happy. Thanks to all the helpfull people posting in this forum ;)