topic Re: Placing variables in my section in MQX Software Solutions

Placing variables in my section

LordMark — Thu, 29 Oct 2020 08:47:14 GMT

Hi everybody. I'm using M52259DEMOIT and I'm creating a new MQX project. I have CW 7.2 and MQX3.6.

I need to place some variables in the section I create in the .lcf file. In my previous project, with no MQX environment, I did it, but now I'm getting some errors.

I create my section (named static_ram) after BSS in .lcf file (I copied the .lcf in my project folder):

MEMORY{## intflash    (RX): ORIGIN = 0x00000000, LENGTH = 0x00080000## sram        (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000   vectorrom   (RX): ORIGIN = 0x00000000, LENGTH = 0x00000400   cfmprotrom  (RX): ORIGIN = 0x00000400, LENGTH = 0x00000020   rom         (RX): ORIGIN = 0x00000420, LENGTH = 0x0007FBE0  # Code + Const data    ram         (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000  # SRAM - RW data   # kernel space starts after RAM variables (Location of MQX Kernel data + MQX heap)   end_of_kd   (RW): ORIGIN = 0x2000FFF0, LENGTH = 0x00000000      # Boot stack reused by MQX Kernel data   bstack      (RW): ORIGIN = 0x2000FA00, LENGTH = 0x00000200  # Boot stack   end_bstack  (RW): ORIGIN = 0x2000FBFF, LENGTH = 0x00000000}[...].main_application_bss :   {      __START_SBSS = .;      *(.sbss)      *(SCOMMON)      __END_SBSS = .;      __START_BSS = .;      *(.bss)      *(COMMON)      __END_BSS = .;   } >> ram.static_ram :   {      __START_MYRAM = .;      main.c(.my_variables)      __END_MYRAM = .;   } >> ram[...]

and after making the project I check my .xmap file that contains the new section created:

[...]# .main_application_bss#>20000680          __START_SBSS (linker command file)#>20000680          __END_SBSS (linker command file)#>20000680          __START_BSS (linker command file)  20000680 00000004 .bss    menu (main.c)  20000684 00000006 .bss    rtc_time (main.c)  2000068C 00000004 .bss    port_tc_file (main.c)  20000690 00000004 .bss    _mqx_system_stack (mqx_regabi_d.a mqx.o          )  20000694 00000004 .bss    driver_bundle (m52259demo_regabi_d.a adc_mcf522xx.o )  20000698 00000004 .bss    adc_channels_used (m52259demo_regabi_d.a adc_mcf522xx.o )  2000069C 00000004 .bss    old_isr_adc1_param (m52259demo_regabi_d.a adc_mcf522xx.o )  200006A0 00000004 .bss    old_isr_adc1 (m52259demo_regabi_d.a adc_mcf522xx.o )  200006A4 00000004 .bss    mcf522xx_adc_ptr (m52259demo_regabi_d.a adc_mcf522xx.o )  200006A8 00000004 .bss    old_isr_timer_param (m52259demo_regabi_d.a adt_pit_mcf522x)  200006AC 00000004 .bss    old_isr_timer (m52259demo_regabi_d.a adt_pit_mcf522x)  200006B0 00000008 .bss    adt_internal (m52259demo_regabi_d.a adt_pit_mcf522x)  200006B8 00000004 .bss    mcf522xx_timer_ptr (m52259demo_regabi_d.a adt_pit_mcf522x)  200006BC 00000004 .bss    first_irq (m52259demo_regabi_d.a io_gpio.o      )  200006C0 00000004 .bss    mcf5225_eport_ptr (m52259demo_regabi_d.a io_gpio_mcf5225)  200006C4 00000004 .bss    mcf5225_gpio_ptr (m52259demo_regabi_d.a io_gpio_mcf5225)#>200006C8          __END_BSS (linker command file)# .static_ram#>200006C8          __START_MYRAM (linker command file)#>200006C8          __END_MYRAM (linker command file)# .kernel_data#>200006D0          ___KERNEL_DATA_START (linker command file)[...]

Now in main.c I define my variable to be stored in that section but I'm in trouble with that. I tried both "__declspec(static_ram)" and "#pragma section static_ram". The first gives the error "Illeal type qualifier(s)" and the seconds gives no error but places my variable in standard bss section.

Where am I wrong?

Thanks in advance,

Marco

Re: Placing variables in my section

boogy — Thu, 09 Sep 2010 23:22:27 GMT

The documentation is scarce on this issue.

This is my solution.

#pragma define_section nvram ".nvram" far_absolute RW
#pragma section nvram begin
__declspec(nvram)   f_rec ram_file[MAX_FILES];// MAX_FILES * f_rec size
__declspec(nvram) uint_16 ram_table_cs;   //ram file table check sum
__declspec(nvram) uint_16 system_init;   // system init flag
__declspec(nvram) uint_16 power_up;    // power up flag
__declspec(nvram) rnd_flash_file_rec rnd_flash_file; //RND flash program file
__declspec(nvram) log_rec alarm_log[ALARM_LOG_SIZE],
      slave_log[SLAVE_LOG_SIZE],
      slave_alarm_log[SLAVE_ALARM_LOG_SIZE];

__declspec(nvram) uint_16 main_log_inptr,              /* main log */
      main_log_outptr,
      main_log_ackptr,
      num_events_in_main_log,  /* 0..max_log_size */
      alarm_log_inptr,  /* alarm log */
      alarm_log_outptr,
      alarm_log_ackptr,
      slave_log_inptr,  /* slave log */
      slave_log_outptr,
      slave_log_ackptr,
      slave_alarm_log_inptr,  /* slave alarm log */
      slave_alarm_log_outptr,
      slave_alarm_log_ackptr;
#pragma section nvram end

Re: Placing variables in my section

LordMark — Thu, 09 Sep 2010 23:51:04 GMT

Can you post your .lcf?

Re: Placing variables in my section

boogy — Fri, 10 Sep 2010 01:21:14 GMT

My lcf is a bit complicated because I am firmware upgrading certain sections and have to maintain an umoving base.

This is the same methodology you are using.

{
mram (RW): ORIGIN = 0x10000000, LENGTH = 0x00800000
## sram (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000

   vectorrom   (RX): ORIGIN = 0x00000000, LENGTH = 0x00000400
   cfmprotrom (RX): ORIGIN = 0x00000400, LENGTH = 0x00000020
   rom         (RX): ORIGIN = 0x00000420, LENGTH = 0x0002FBE0    # Code + Const data
   flashx      (RW): ORIGIN = 0x00030000, LENGTH = 0x00050000    # Internal flash
   upgrade     (RX): ORIGIN = 0x00070000, LENGTH = 0x00010000    # Code + Const data
   all   (RX)RIGIN = 0x00030000, LENGTH = 0x00050000 #upgradable section
   ram         (RW): ORIGIN = 0x20000000, LENGTH = 0x00010000 # SRAM - RW data

   # kernel space starts after RAM variables (Location of MQX Kernel data + MQX heap)
   end_of_kd   (RW): ORIGIN = 0x2000FFF0, LENGTH = 0x00000000

   # Boot stack reused by MQX Kernel data
   bstack      (RW): ORIGIN = 0x2000FA00, LENGTH = 0x00000200 # Boot stack
   end_bstack (RW): ORIGIN = 0x2000FBFF, LENGTH = 0x00000000
}

KEEP_SECTION { .vectors_rom, .vectors_ram, .cfmconfig }

SECTIONS
{
    ___INTERNAL_SRAM_BASE = 0x20000000;
    ___INTERNAL_SRAM_SIZE = 0x00010000;
    ___INTERNAL_FLASH_BASE = 0x00030000;
    ___INTERNAL_FLASH_SIZE = 0x00050000;
#    ___EXTERNAL_MRAM_BASE = 0x10000000;
#    ___EXTERNAL_MRAM_SIZE = 0x00080000;
#    ___EXTERNAL_MRAM_ROM_BASE = 0x10000000;
#    ___EXTERNAL_MRAM_ROM_SIZE = 0x00060000;
#    ___EXTERNAL_MRAM_RAM_BASE = 0x10060000;
#    ___EXTERNAL_MRAM_RAM_SIZE = 0x00020000;

___IPSBAR = 0x40000000; # Peripherals/FlexCAN
___VECTOR_TABLE_START = 0x20000000; # Runtime vector table in sram

    # MQX link time configurations
    ___DEFAULT_PROCESSOR_NUMBER = 1;
    ___DEFAULT_INTERRUPT_STACK_SIZE = 1024;
    ___KERNEL_DATA_VERIFY_ENABLE = 0;    # Test SDRAM read/write

    # Flashx configurations
    ___FLASHX_SECT_SIZE = 0x1000;
.vectors :
{
        ___VECTOR_TABLE_ROM_START = .;  # Runtime vector table in sram
  *(.vectors_rom)
  . = ALIGN (0x4);
} > vectorrom

.cfmprotect :
{
*(.cfmconfig)
. = ALIGN (0x4);
} > cfmprotrom

.upgrade_application :
{
  OBJECT (_get_rc_version, Access.c)
  . = ALIGN (0x20);
  OBJECT (_process_elevator_access, Access.c)
  . = ALIGN (0x20);
  OBJECT (_process_reader_data, Access.c)
  . = ALIGN (0x20);
  OBJECT (_process_mag_reader_data, Access.c)
  . = ALIGN (0x20);
  OBJECT (_get_ap_state_and_tz, Access.c)
  . = ALIGN (0x20);
  OBJECT (_set_ap_elevator_outputs, Access.c)
  . = ALIGN (0x20);
  OBJECT (_process_code_reader_link, Access.c)
  . = ALIGN (0x20);
  OBJECT (_verify_code, Access.c)
  . = ALIGN (0x20);
  OBJECT (_check_access_level, Access.c)
  . = ALIGN (0x20);
  OBJECT (_check_access_level2, Access.c)
  . = ALIGN (0x20);
  OBJECT (_valid_hi_sec_at_access_p, Access.c)
  . = ALIGN (0x20);
  OBJECT (_interlock_violation, Access.c)
  . = ALIGN (0x20);
  OBJECT (_interlock_check, Access.c)
  . = ALIGN (0x20);
  OBJECT (_update_user_area_usage, Access.c)
  . = ALIGN (0x20);
  OBJECT (_valid_lock_at_access_p, Access.c)
  . = ALIGN (0x20);
  Access.c(.text)
  Access.c(.rodata)

} > upgrade
.non_volitile_ram :
    {
    __START_NVRAM = .;
    *(.nvram)
    __END_NVMRAM = . ;
    _START_RAMDISK = .;
    *(.ramdisk)
    _END_RAMDISK = .;

    } > mram

    .main_application :
    {
        *(KERNEL)
        *(S_BOOT)
        *(IPSUM)
        *(.init)
        *(.fini)
        *(.eini)
        *(.ctors)
        fp_coldfire.o(.text)
        fp_coldfire.o(.rodata)
        C_4i_CF_RegABI_MSL.a(.text)
        C_4i_CF_RegABI_MSL.a(.rodata)
        C_4i_CF_RegABI_Runtime.a(.text)
        C_4i_CF_RegABI_Runtime.a(.rodata)
        m52259unc_regabi.a(.text)
        m52259unc_regabi.a(.rodata)
        mqx_regabi.a(.text)
        mqx_regabi.a(.rodata)
        rtcs_regabi.a(.text)
        rtcs_regabi.a(.rodata)
  crc.c(.text)
  crc.c(.rodata)
  unc500_gpio5.c(.text)
  unc500_gpio5.c(.rodata)
  Flash_Upgrade_Task.c(.rodata)
  Flash_Upgrade_Task.c(.text)
        *(.dtors)
        .= ALIGN(0x4);
        *(.rdata)
        *(.exception)
        . = ALIGN(0x4);
        __exception_table_start__ = .;
        EXCEPTION
        __exception_table_end__ = .;
        ___sinit__ = .;
        STATICINIT

        .= ALIGN(0x4);
        __COPY_OF_DATA = .;
    } > rom

.all_application :
{
  ttl.c(.rodata)
  ttl.c(.text)
  ARC_H.C(.text)
  ARC_L21.C(.text)
  cgi_unc.c(.text)
  COMCOM.C(.text)
  httpdsrv_unc.c(.text)
  LINK.C(.text)
  loncoms.c(.text)
  nc500.c(.text)
  nc500_socket.c(.text)
  NCLOG28.C(.text)
  RAMFILE11.C(.text)
  reader10.c(.text)
  TEST.C(.text)
  telnet.c(.text)
  tfs_data.c(.text)
  unc500a2d.c(.text)
  init_capture.c(.text)
  init_capture.c(.rodata)
  capture.c(.text)
  capture.c(.rodata)
        *(.text)
        *(.rodata)
} > all

    .main_application_data : AT(__COPY_OF_DATA)
    {
        . = ALIGN(0x10000);
        ___VECTOR_TABLE_RAM_START = .;  # Runtime vector table in sram
  *(.vectors_ram)

        . = ALIGN(512);
        __BDT_BASE = .;
        *(.usb_bdt)
        __BDT_END = .;
        . = ALIGN(0x4);

        __START_SDATA = .;
        *(.sdata)
        __END_SDATA = .;

        . = ALIGN(0x4);
        __SDA_BASE = .;
        __SDA_BASE_ = __SDA_BASE;

        __START_DATA = .;
        C_4i_CF_RegABI_MSL.a(.data)
        C_4i_CF_RegABI_Runtime.a(.data)
        m52259unc_regabi.a(.data)
        mqx_regabi.a(.data)
        rtcs_regabi.a(.data)
  crc.c(.data)
  unc500_gpio5.c(.data)
  Flash_Upgrade_Task.c(.data)
        *(.data)
        __END_DATA = .;
        . = ALIGN(0x04);
    } > ram

# Locate the ROM copy table into ROM after the initialized data
_romp_at = __COPY_OF_DATA + SIZEOF(.main_application_data);

    .romp : AT (_romp_at)
    {
        __S_romp = _romp_at;
        WRITEW(__COPY_OF_DATA);   #ROM start address
        WRITEW(ADDR(.main_application_data));      #RAM start address
        WRITEW(SIZEOF(.main_application_data));    #size
        WRITEW(0);
        WRITEW(0);
        WRITEW(0);
    }

_flashx_start = ___INTERNAL_FLASH_BASE;

# flashx working area spans across the whole rest of Flash memory
___FLASHX_START_ADDR = ___INTERNAL_FLASH_BASE;
___FLASHX_END_ADDR = ___INTERNAL_FLASH_BASE + ___INTERNAL_FLASH_SIZE;

    .main_application_bss :
    {
        __START_SBSS = .;
        *(.sbss)
        *(SCOMMON)
        __END_SBSS = .;
        __START_BSS = .;
        C_4i_CF_RegABI_MSL.a(.bss)
        C_4i_CF_RegABI_Runtime.a(.bss)
        m52259unc_regabi.a(.bss)
        mqx_regabi.a(.bss)
        rtcs_regabi.a(.bss)
  crc.c(.bss)
  unc500_gpio5.c(.bss)
  Flash_Upgrade_Task.c(.bss)

        *(.bss)
        *(COMMON)
        __END_BSS = .;
    } >> ram

    .kernel_data : #AT(ADDR(.main_application_bss) + SIZEOF(.main_application_bss))
    {
        ___KERNEL_DATA_START = ALIGN(0x10);
    }

    .end_of_kernel_data :
    {
        ___KERNEL_DATA_END = .;
    } > end_of_kd

    .boot_stack :
    {
        _stack_end = .;
    } > bstack

    .end_of_boot_stack :
    {
        _stack_addr = .;
        __SP_INIT    = .;
        ___BOOT_STACK_ADDRESS = .;
    } > end_bstack

}