2017-01-10 02:11 AM
Hi,
I'm trying to put some data in bank2 of an stm32L152ZET6. This data is initialized like this:
__attribute__((__section__('.arrayFlash'))) uint32_t flashData[200] = { 8, 8 , 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
__attribute__((__section__('.arrayFlash'))) uint32_t flashStrings[100] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};Here's the link file
/* Entry Point */
ENTRY(Reset_Handler)/* Highest address of the user mode stack */_estack = 0x20014000; /* end of RAM *//* Generate a link error if heap and stack don't fit into RAM */_Min_Heap_Size = 0x200; /* required amount of heap */_Min_Stack_Size = 0x400; /* required amount of stack *//* Specify the memory areas */MEMORY{FLASH (rx) : ORIGIN = 0x8007000, LENGTH = 228KFLASH_BANK2 (rx) : ORIGIN = 0x8040000, LENGTH = 256KEEPROM_BANK1 (rx) : ORIGIN = 0x8080000, LENGTH = 8KEEPROM_BANK2 (rx) : ORIGIN = 0x8082000, LENGTH = 8K RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 80K}/* Define output sections */SECTIONS{ /* The startup code goes first into FLASH */ .isr_vector : { . = ALIGN(4); KEEP(*(.isr_vector)) /* Startup code */ . = ALIGN(4); } >RAM AT> FLASH /* The program code and other data goes into FLASH */ .text : { . = ALIGN(4); *(.text) /* .text sections (code) */ *(.text*) /* .text* sections (code) */ *(.glue_7) /* glue arm to thumb code */ *(.glue_7t) /* glue thumb to arm code */ *(.eh_frame) KEEP (*(.init)) KEEP (*(.fini)) . = ALIGN(4); _etext = .; /* define a global symbols at end of code */ } >FLASH /* Constant data goes into FLASH */ .rodata : { . = ALIGN(4); *(.rodata) /* .rodata sections (constants, strings, etc.) */ *(.rodata*) /* .rodata* sections (constants, strings, etc.) */ . = ALIGN(4); } >FLASH .ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH .ARM : { __exidx_start = .; *(.ARM.exidx*) __exidx_end = .; } >FLASH .preinit_array : { PROVIDE_HIDDEN (__preinit_array_start = .); KEEP (*(.preinit_array*)) PROVIDE_HIDDEN (__preinit_array_end = .); } >FLASH .init_array : { PROVIDE_HIDDEN (__init_array_start = .); KEEP (*(SORT(.init_array.*))) KEEP (*(.init_array*)) PROVIDE_HIDDEN (__init_array_end = .); } >FLASH .fini_array : { PROVIDE_HIDDEN (__fini_array_start = .); KEEP (*(SORT(.fini_array.*))) KEEP (*(.fini_array*)) PROVIDE_HIDDEN (__fini_array_end = .); } >FLASH /* used by the startup to initialize data */ _sidata = LOADADDR(.data); /* Initialized data sections goes into RAM, load LMA copy after code */ .data : { . = ALIGN(4); _sdata = .; /* create a global symbol at data start */ *(.data) /* .data sections */ *(.data*) /* .data* sections */ . = ALIGN(4); _edata = .; /* define a global symbol at data end */ } >RAM AT> FLASH /* Uninitialized data section */ . = ALIGN(4); .bss : { /* This is used by the startup in order to initialize the .bss secion */ _sbss = .; /* define a global symbol at bss start */ __bss_start__ = _sbss; *(.bss) *(.bss*) *(COMMON) . = ALIGN(4); _ebss = .; /* define a global symbol at bss end */ __bss_end__ = _ebss; } >RAM /* User_heap_stack section, used to check that there is enough RAM left */ ._user_heap_stack : { . = ALIGN(8); PROVIDE ( end = . ); PROVIDE ( _end = . ); . = . + _Min_Heap_Size; . = . + _Min_Stack_Size; . = ALIGN(8); } >RAM .arrayFlash : { . = ALIGN(64*4); *(.arrayFlash) . = ALIGN(64*4); } >FLASH_BANK2 /* Remove information from the standard libraries */ /DISCARD/ : { libc.a ( * ) libm.a ( * ) libgcc.a ( * ) } .ARM.attributes 0 : { *(.ARM.attributes) }}When I open the map file, It seems that the arrays are put in the right bank:
*(.arrayFlash)
.arrayFlash 0x08040000 0x4b0 Src/main.o 0x08040000 flashData 0x08040320 flashStrings 0x08040500 . = ALIGN (0x100) *fill* 0x080404b0 0x50But when I open the device with st-link utility, the data is not initialized at those adresses.
I tried the same thing but with data in bank1 like below, and it works.
.arrayFlash :
{ . = ALIGN(64*4); *(.arrayFlash) . = ALIGN(64*4); } >FLASHDoes anybody have an idea of what may happen?
Thanks
Julien
Solved! Go to Solution.
2017-01-12 02:29 AM
All right, I upgraded to SW4STM32 1.12 and it works now.
Thanks for your help.
2017-01-10 08:27 AM
Is the data correctly in the .HEX file? Did you use the ST-LINK Utilities to program the device? Which version?
2017-01-10 09:42 AM
Good question! the data is correct in the hex file.
That means that the flash process is wrong.
I use SW4STM32 tools suite. I suspect that the flash process is done by openocd. ( Open On-Chip Debugger 0.10.0-dev-00270-g7ec9836 (2016-05-18-14:26) )
If I flash with STlink utility it works.
2017-01-12 02:29 AM
All right, I upgraded to SW4STM32 1.12 and it works now.
Thanks for your help.