How to setup clock from external crystal on K64F and KSDK2.1

[mastupristi]

I'm porting a firmware running on a custom board from KSDK 1.3 to KSDK 2.1. I use Kinetis MK64FN1M0VLQ12 clocked with a 12.288 MHz crystal. With KSDK 1.3 the firmware works fine. With KSDK 2.1 I am not able to correctly setup clock.

void BOARD_BootClockRUN(void)
{
    /*
    * Core clock: 119.808MHz
    * Bus clock: 59.904MHz
    */
    const mcg_pll_config_t pll0Config = {
        .enableMode = 0U,
        .prdiv = 0x03U,        // divide by 4
        .vdiv = 0x0fU,        // multiply by 39
    };
    const sim_clock_config_t simConfig = {
        .pllFllSel = 1U,        /* PLLFLLSEL select PLL. */
        .er32ksrc=2U,         /* ERCLK32K selection, use RTC. */
        .clkdiv1 = SIM_CLKDIV1_OUTDIV1(0) | SIM_CLKDIV1_OUTDIV2(1) | SIM_CLKDIV1_OUTDIV3(2) | SIM_CLKDIV1_OUTDIV4(4),
    };

    CLOCK_SetSimSafeDivs();
    BOARD_InitOsc0();

    CLOCK_BootToPeeMode(kMCG_OscselOsc, kMCG_PllClkSelPll0, &pll0Config);

    CLOCK_SetInternalRefClkConfig(kMCG_IrclkEnable, kMCG_IrcSlow, 0);
    CLOCK_SetSimConfig(&simConfig);

    SystemCoreClock = 119808000U;    // 12288000/4 * 39
}

void BOARD_InitOsc0(void)
{
    const osc_config_t oscConfig = {.freq = BOARD_XTAL0_CLK_HZ,
                                    .capLoad = 0,
                                    .workMode = kOSC_ModeOscHighGain,
                                    .oscerConfig = {
                                        .enableMode = kOSC_ErClkEnable,
#if (defined(FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER) && FSL_FEATURE_OSC_HAS_EXT_REF_CLOCK_DIVIDER)
                                        .erclkDiv = 0U,
#endif
                                    }};

    CLOCK_InitOsc0(&oscConfig);

    /* Passing the XTAL0 frequency to clock driver. */
    CLOCK_SetXtal0Freq(BOARD_XTAL0_CLK_HZ);
}

firmware hangs in CLOCK_BootToPeeMode().

I want to make this clock path:

where am I wrong?

best regards

Max

[MarekTrmac]

Hi Max,

there is available Clocks tool on http://mcuxpresso.nxp.com/ that can generate clock tool initialization code for you. This might help. The tool is available both as WEB version and also as DESKTOP version.

Regards

Marek