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STR9 Flash pb, no restart after power cycle

Posted by damien h on September 4, 2008
Hi everybody,


I have some trouble to program my STR9 with my USB Olimix JTAG and OpenOCD (r717)

(dev board : E912 Olimex with STR912F44, JTAG : Olimex ARM-USB-OCD, i boot always from bank 0, bank1 is used for data only)


I have no problem for debug, everything works perfectly (including FreeRTOS ;-)


If I load an image, i can execute, do a reset and continue to use my device. But when i loose my power supply, the software CAN'T restart.

Is somebody who have successfully used OpenOCD - Olimex JTAG to burn a STR912 flash ?
Is somebody who have already experienced this kind of events.

Is it something wrong in my linker file ?


Any idea welcome.
Thanks in advance.

Damien



_HEAPSIZE = 40000;


MEMORY
{
flash (rx) : ORIGIN = 0x00000000, LENGTH = 512K
ram (rw) : ORIGIN = 0x04000000, LENGTH = 96K
}


SECTIONS
{
.text :
{
KEEP(*(.vectors))
KEEP(*(.init))
*(.text .text.*)
*(.gnu.linkonce.t.*)
*(.glue_7t .glue_7)
KEEP(*(.fini))
*(.gcc_except_table)
} >flash =0
. = ALIGN(4);


/* .rodata section which is used for read-only data (constants) */

.rodata :
{
*(.rodata .rodata.*)
*(.gnu.linkonce.r.*)
} >flash
. = ALIGN(4);

_etext = .;
PROVIDE (etext = .);

/* .data section which is used for initialized data */

.data : AT (_etext)
{
__data_start = .;
*(.data .data.*)
*(.gnu.linkonce.d.*)
. = ALIGN(4);
*(.fastrun .fastrun.*)
} >ram
. = ALIGN(4);

_edata = .;
PROVIDE (edata = .);

/* .bss section which is used for uninitialized data */

.bss :
{
__bss_start = .;
__bss_start__ = .;
*(.bss .bss.*)
*(.gnu.linkonce.b.*)
*(COMMON)
. = ALIGN(4);
} >ram
. = ALIGN(4);
__bss_end__ = .;

_end = .;
PROVIDE(end = .);

/*
.heap (NOLOAD) :
{
__heap_start__ = .;
_heap_start = .;
*(.heap)
. = MAX(__heap_start__ + _HEAPSIZE , .);
} >ram
__heap_end__ = __heap_start__ + SIZEOF(.heap);
_heap_end = __heap_start__ + SIZEOF(.heap);

*/

}
. = ALIGN(32 / 8);
_end = .;
_bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
PROVIDE (end = .);




RE: STR9 Flash pb, no restart after power cycle

Posted by Stefano Oliveri on September 4, 2008
Hi Damien,

I had the same problem on STR912+Eclipse+OpenOCD. I use the same linker file, but I found that the problem was in the startup file - startup.s.

I added the following three code lines just before the _start assembly label:

---------------------------------------
.text
.arm
.section .init, "ax"


_start:
ldr pc, =NextInst
NextInst:
--------------------------------------

This solve my problem by placing the _start function in the right segment.

I hope this should help you.

Regards,
Stefano

RE: STR9 Flash pb, no restart after power cycle

Posted by damien h on September 4, 2008
Hi Stephano,


it's clear, You have completely right....
Thank you very much for this help


Regards.



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