TMS570LC4357: F021 API problem in copying data from flash to RAM

Usha Jogappanaik

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN

Hi,

I am trying to erase and write a sector in bank0 so according to "The F021 Flash API library cannot be executed from the same bank as the active bank selected for the API commands to operate on. the F021 Flash API must be executed from RAM." For this I am trying to copy APIs into RAM. but I get a warning saying no matching section for Fapi_UserDefinedFunctions.obj which is kind strange and gets hung in dataEntry . my linker script and assembly code for copying into RAM are as below. I need some support here

regards

Usha

MEMORY
{
/* USER CODE BEGIN (2) */
/* USER CODE END */
    VECTORS   (X)  : origin=0x00000000 length=0x00000020
    FLASH_API (RX) : origin=0x00000020 length=0x000014E0
    FLASH0    (RX) : origin=0x00001500 length=0x001FEB00
    STACKS    (RW) : origin=0x08000000 length=0x00001500
    RAM       (RW) : origin=0x08001500 length=0x00006B00

/* USER CODE BEGIN (3) */
/* USER CODE END */
}

SECTIONS
{
/* USER CODE BEGIN (5) */
/* USER CODE END */
    .intvecs : {} > VECTORS

   flashAPI :
   {
     ../Debug/source/Fapi_UserDefinedFunctions.obj (.text)
     ../Debug/source/ra_f021.obj (.text)
     --library= F021_API_CortexR4_BE_L2FMC_V3D16.lib (.text)
   } load = FLASH_API, run = RAM, LOAD_START(api_load), RUN_START(api_run), SIZE(api_size)

    .text    : {} > FLASH0
    .const   : {} > FLASH0
    .cinit   : {} > FLASH0
    .pinit   : {} > FLASH0
    .bss     : {} > RAM
    .data    : {} > RAM
    .sysmem  : {} > RAM
    FEE_TEXT_SECTION  : {} > FLASH0
    FEE_CONST_SECTION : {} > FLASH0
    FEE_DATA_SECTION  : {} > RAM

/* USER CODE BEGIN (6) */
/* USER CODE END */
}

;-------------------------------------------------------------------------------
;
; Copy the Flash API from flash to SRAM.
;

    .def     _copyAPI2RAM_
    .asmfunc

_copyAPI2RAM_

   .ref    api_load
flash_load   .word api_load
   .ref    api_run
flash_run   .word api_run
    .ref    api_size
flash_size  .word api_size

     ldr    r0, flash_load
     ldr    r1, flash_run
     ldr    r2, flash_size
     add    r2, r1, r2
copy_loop1:
     ldr     r3, [r0], #4
     str     r3, [r1], #4
     cmp     r1, r2
     blt     copy_loop1
      bx     lr

    .endasmfunc

over 2 years ago

0 QJ Wang over 2 years ago

TI__Guru**** 196306 points

Can you please try this way:

extern unsigned int api_load;
extern unsigned int api_size;
extern unsigned int api_run;

/* USER CODE END */

int main(void)
{
/* USER CODE BEGIN (3) */
uint32_t status;

/* Copy the flash APIs to SRAM*/
memcpy(&api_run, &api_load, (uint32)&api_size);

0 Usha Jogappanaik over 2 years ago in reply to QJ Wang

Prodigy 110 points

Hi Wang,

Thanks for the response. I did try the way you mention I still have the same warning 'no matching section for Fapi_UserDefinedFunctions.obj '

0 Usha Jogappanaik over 2 years ago in reply to Usha Jogappanaik

Prodigy 110 points

well I could fix warning issue. but I get into 'prefetchEntry' error state at the point where flash api functions get called . is there anything I am missing ?

0 QJ Wang over 2 years ago in reply to Usha Jogappanaik

TI__Guru**** 196306 points

Hi Usha,

Can you please check if content at &api_load i flash is copied to RAM at &api_run?

If memcpy(...) is used, the _copyAPI2RAM_() should not be called.

0 QJ Wang over 2 years ago in reply to QJ Wang

TI__Guru**** 196306 points

Where is the file Fapi_UserDefinedFunctions.c located?

0 Usha Jogappanaik over 2 years ago in reply to QJ Wang

Prodigy 110 points

I am using memcpy only and I see data copied into RAM

0 Usha Jogappanaik over 2 years ago in reply to QJ Wang

Prodigy 110 points

if you mean the path its inside the source folder (halcogen generated files). Also to add my main function looks like this

int main(void)
{
/* USER CODE BEGIN (3) */

    /* Copy the flash APIs to SRAM*/
    memcpy(&apiRunStart, &apiLoadStart, (uint32)&apiLoadSize);

    _enable_IRQ_interrupt_();
    sciInit();
    sciSetBaudrate(sciREG3,460800);
    ra_stdio_init(RA_DEBUG_PORT);

    ra_fapi();

    while(1) ;
/* USER CODE END */
}

0 QJ Wang over 2 years ago in reply to Usha Jogappanaik

TI__Guru**** 196306 points

Hi Usha,

Please configure the SRAM as executable:

0 Usha Jogappanaik over 2 years ago in reply to QJ Wang

Prodigy 110 points

Hi Wang,

I have taken care of it SRAM execute permission. May be I was not so clear . In debugging mode I can enter the function 'ra_fapi' when I step in, the line which has flash API's function which is in my case ' Fapi_initializeFlashBanks ' gets into 'prefetchEntry' error state. So looks like I have some permission issue executing flash APIs. can you comment on this ?

0 QJ Wang over 2 years ago in reply to Usha Jogappanaik

TI__Guru**** 196306 points

The Flash APIs must be run in a privileged mode to allow access to the Flash memory controller registers.

System clock frequency (HCLK) must be used in Fapi_initializeFlashBanks() call.

0 Usha Jogappanaik over 2 years ago in reply to QJ Wang

Prodigy 110 points

Yes api_initializeFlashBanks() does include HCLK i.e 150

if ((Fapi_initializeFlashBanks((uint32_t)SYS_CLK_FREQ)) == Fapi_Status_Success)
    {
        Fapi_setActiveFlashBank(Fapi_FlashBank0);                       
        Fapi_enableMainBankSectors(0xFFFF);                           

        while( FAPI_CHECK_FSM_READY_BUSY != Fapi_Status_FsmReady );
        while( FAPI_GET_FSM_STATUS != Fapi_Status_Success );
    }

I am using halcogen generated code, in startup code initially privilege mode is set later its switched to user mode . can you please share some example like how to switch to privileged mode from user mode.

0 Usha Jogappanaik over 2 years ago in reply to Usha Jogappanaik

Prodigy 110 points

When I single step through the F021 functions running in RAM everything works perfect. When I run the code it fails with a prefetch abort. So why is the software working in single step and crashes in free running?

0 Usha Jogappanaik over 2 years ago in reply to Usha Jogappanaik

Prodigy 110 points

I got it working by disabling interrupts before calling Flash Api

Arm-based microcontrollers

Arm-based microcontrollers forum

TMS570LC4357: F021 API problem in copying data from flash to RAM