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TMS320F28388D: Device_init() issue debugging code in FLASH

Fabio Rastrello
Prodigy 120 points
Part Number: TMS320F28388D
Other Parts Discussed in Thread: SYSCONFIG, C2000WARE

Hi,

I'm using a MCU063B version of the Control Card for the F28388D. I'm also using C2000Ware 5.00.00.00, SysConfig and FreeRTOS in my project.

I was always executing my code in RAM with no problems, now trying to execute it in FLASH, the same code gives me an error at the very beginning initialization:

 Device_init() -> 

              SysCtl_setClock(DEVICE_SETCLOCK_CFG) ->

                               //
                               // Delay of at least 120 OSCCLK cycles required post PLL bypass
                               //
                               SysCtl_delay(23U);

The error gets me to _system_post_cinit():

Looking at Disassembly:

Why do I get this and how can I fix it?

Thanks,

Fabio 

  • +1
    TI__Mastermind 32655 points

    Hi Fabio,

    SysCtl_delay is ramfunc. Meaning, it is loaded to Flash, but run from RAM.

    You need to copy the contents from Flash to RAM before CPU can execute any such ramfuncs. 

    If you are using Device_init, it is done as part of     memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);

    Can you confirm if this is done in your application?

    Regards,

    Veena

  • 0 in reply to Veena Kamath
    Prodigy 120 points

    Hi Veena,

    many thanks, I had a wrong symbol in Predefined Symbols in my Flash build configuration: FLASH instead of _FLASH. Thus, that part of code was not executed.

    Thanks and best regards,

    Fabio