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F28337xD Problem enabling Auxillary clock

Usman Rahim
Prodigy 160 points

Hi Everyone

i am making bios based project for F28377D but my code is hanging at the following line of F2837xD_sysCtrl.c

 while(ClkCfgRegs.SYSPLLSTS.bit.LOCKS != 1)

{
// Uncomment to service the watchdog
// ServiceDog();
}

  • 0
    TI__Guru** 116891 points

    Hi,

    You are using internal OSC or external OSC in this case? Also what is your PLL settings?

    Regard,

    Vivek Singh

     

     

  • 0 in reply to Vivek Singh
    Prodigy 160 points

    Im using the Control Card,So what should be the Sys PLL functions parameter in F28377D_sysctrl.c

    currently it is

    InitSysPll(XTAL_OSC,IMULT_20,FMULT_1,PLLCLK_BY_2); //PLLSYSCLK = 10Mhz(OSCCLK) * 40 (IMULT) * 1 (FMULT) / 2 (PLLCLK_BY_2)

    where

    XTAL_OSC = 1
    IMULT = 20
    PLLCLK = 1

    where  at my BIOS settings and the settings are
    Input Clock = 20

    PLL Multiplier = 20

    Sys Clock Div = 1

  • 0 in reply to Usman Rahim
    TI__Guru** 116891 points

    Hi Rahim,

    In subject line you mention issue with Auxillary clock but the function you are using is for System PLL. Which PLL you are enabling?

    Assuming issue is with system PLL, instead of using XTAL_OSC if you use INT_OSC2, does it work fine?

    Regards,

    Vivek Singh