topic Re: S32k144 scst in S32K

S32k144 scst

995094985 — Tue, 15 Dec 2020 10:07:12 GMT

hi.

I am using s32k144 scst library.and i get problem as:

iar error

and detials is:

I dont know how to solve it.It maybe caused by my link file.

thanks for your help

Re: S32k144 scst

frantisekdobes — Mon, 21 Dec 2020 00:53:20 GMT

Hi,

thank you for providing the linker file. I have checked within IAR embedded workbench 8.32.3 and I do see the same error. The issue can be resolved by adding the following lines into the linker file:

initialize manually { section .m4_scst_test_shell_data };
do not initialize { section .m4_scst_test_shell_data };
initialize manually { section .m4_scst_ram_data };
do not initialize { section .m4_scst_ram_data };
initialize manually { section .m4_scst_ram_data_target0 };
do not initialize { section .m4_scst_ram_data_target0 };
initialize manually { section .m4_scst_ram_data_target1 };
do not initialize { section .m4_scst_ram_data_target1 };
initialize manually { section .m4_scst_ram_test_code };
do not initialize { section .m4_scst_ram_test_code };

Note that the section .m4_scst_test_shell_data must be initialized manually in startup code (or at the beginning of main function) before selftest is run.

Best Regards,
Frantisek

Re: S32k144 scst

daichenghe — Mon, 21 Dec 2020 01:28:17 GMT

Thank you very much,i have solved this problem by using __iar_data_init3 function,but i want to know to how to create a function myself to solve it.m4_scst_test_shell_data maybe rw_data, so i must init it by copying flash to ram,but how to know the right flash location? I'm more familiar with gcc,we can set the flash address to store the rw_data,but in my link file for iar,i dont know where is the flash address to store m4_scst_test_shell_data,so how to set it?
thank you again!

Re: S32k144 scst

frantisekdobes — Mon, 21 Dec 2020 10:53:26 GMT

The initialized data for .m4_scst_test_shell_data are automatically stored by IAR into a section .m4_scst_test_shell_data_init (name of section plus _init at the end). Then in code the address and size of the sections can be retrieved for example by this code:

#pragma section = ".m4_scst_test_shell_data" #pragma section = ".m4_scst_test_shell_data_init" dest = __section_begin(".m4_scst_test_shell_data"); src=__section_begin(".m4_scst_test_shell_data_init"); size = ( (uint32_t) __section_end(".m4_scst_test_shell_data_init") - (uint32_t) __section_begin(".m4_scst_test_shell_data_init"));

Then there can be used memcpy or a for loop to copy the initialized data from src to dest.

Best regards,

Frantisek

Re: S32k144 scst

daichenghe — Tue, 22 Dec 2020 03:20:03 GMT

I understand now，you are very great，I can init it by myself now, thank you very much!

but i also have a problem,IAR still remind me to use __iar_data_init3,how to avoid it?
this is my code and linke file:
void init_m4_scst_test_shell_data(void)
{
uint8_t * m4_scst_test_shell_data_dest;
uint8_t * m4_scst_test_shell_data_src;
uint8_t * m4_scst_test_shell_data_src_end;

#pragma section = ".m4_scst_test_shell_data"
#pragma section = ".m4_scst_test_shell_data_init"
m4_scst_test_shell_data_dest = __section_begin(".m4_scst_test_shell_data");
m4_scst_test_shell_data_src=__section_begin(".m4_scst_test_shell_data_init");
m4_scst_test_shell_data_src_end = __section_end(".m4_scst_test_shell_data_init");

while (m4_scst_test_shell_data_src_end != m4_scst_test_shell_data_src)
{
*m4_scst_test_shell_data_dest = *m4_scst_test_shell_data_src;
m4_scst_test_shell_data_dest++;
m4_scst_test_shell_data_src++;
}
}

initialize manually
{
section .customerBootData,
section .m4_scst_ram_data,
section .m4_scst_ram_data_target0,
section .m4_scst_ram_data_target1,
section .m4_scst_ram_test_code,
section .m4_scst_test_shell_data,
};

if i set the section do not initialize

it also create a warning:1468 out of 1468 bytes from data record CODE:[0x1FFF8400,0x1FFF89BB] will not be flashed

Re: S32k144 scst

frantisekdobes — Tue, 22 Dec 2020 10:44:17 GMT

I do see the __iar_data_init3 error (similarly for other SCST sections):

Fatal Error[Lp049]: there was no reference to __iar_data_init3, but it is needed to initialize section .m4_scst_ram_data (m4_scst_exception_wrappers.o #6)

After updating the linker file as follows:

initialize manually { section .m4_scst_test_shell_data }; do not initialize { section .m4_scst_test_shell_data }; initialize manually { section .m4_scst_ram_data }; do not initialize { section .m4_scst_ram_data }; initialize manually { section .m4_scst_ram_data_target0 }; do not initialize { section .m4_scst_ram_data_target0 }; initialize manually { section .m4_scst_ram_data_target1 }; do not initialize { section .m4_scst_ram_data_target1 }; initialize manually { section .m4_scst_ram_test_code }; do not initialize { section .m4_scst_ram_test_code };

I don't get the build errors anymore and I also do not see the errors while uploading with flash loader.

Best Regards,
Frantisek

Re: S32k144 scst

daichenghe — Wed, 23 Dec 2020 01:10:24 GMT

You are right, all of "do not initialize" and "initialize manually" are necessary, I thought only "do not initialize" or "initialize manually" is necessary when i refer to the IAR manual.