First I set the parameters
const mcg_config_t mcgConfig_BOARD_BootClockRUN =
{
.mcgMode = kMCG_ModePEE, /* PEE - PLL Engaged External */
.irclkEnableMode = kMCG_IrclkEnable, /* MCGIRCLK enabled, MCGIRCLK disabled in STOP mode */
.ircs = kMCG_IrcSlow, /* Slow internal reference clock selected */
.fcrdiv = 0x0U, /* Fast IRC divider: divided by 1 */
.frdiv = 0x0U, /* FLL reference clock divider: divided by 32 */
.drs = kMCG_DrsLow, /* Low frequency range */
.dmx32 = kMCG_Dmx32Default, /* DCO has a default range of 25% */
.oscsel = kMCG_OscselOsc, /* Selects System Oscillator (OSCCLK) */
.pll0Config =
{
.enableMode = MCG_PLL_DISABLE, /* MCGPLLCLK disabled */
.prdiv = 0x2U, /* PLL Reference divider: divided by 25 */
.vdiv = 0x20U, /* VCO divider: multiplied by 48 */
//.prdiv = 0x18U, /* PLL Reference divider: divided by 25 */
//.vdiv = 0x18U, /* VCO divider: multiplied by 48 */
},
};
const sim_clock_config_t simConfig_BOARD_BootClockRUN =
{
.pllFllSel = SIM_PLLFLLSEL_MCGPLLCLK_CLK, /* PLLFLL select: MCGPLLCLK clock */
.er32kSrc = SIM_OSC32KSEL_RTC32KCLK_CLK, /* OSC32KSEL select: RTC32KCLK clock (32.768kHz) */
.clkdiv1 = 0x01130000U, /* SIM_CLKDIV1 - OUTDIV1: /1, OUTDIV2: /2, OUTDIV3: /2, OUTDIV4: /4 */
};
const osc_config_t oscConfig_BOARD_BootClockRUN =
{
.freq = 20000000U, /* Oscillator frequency: 50000000Hz */
.capLoad = (OSC_CAP0P), /* Oscillator capacity load: 0pF */
.workMode = kOSC_ModeExt, /* Use external clock */
.oscerConfig =
{
.enableMode = kOSC_ErClkEnable, /* Enable external reference clock, disable external reference clock in STOP mode */
}
};
My external clock is 20000000 so I set prdiv = 0x2U and vdiv = 0x20U in order to get PLL = 100000000 (maximum system clock for MK10DN512)
And prescalers clkdiv1 = 0x01130000U to get SYS_CLK = PLL and BUS_CLK = PLL/2
Then I use the library function
void BOARD_BootClockRUN(void)
{
/* Set the system clock dividers in SIM to safe value. */
CLOCK_SetSimSafeDivs();
/* Initializes OSC0 according to board configuration. */
CLOCK_InitOsc0(&oscConfig_BOARD_BootClockRUN);
CLOCK_SetXtal0Freq(oscConfig_BOARD_BootClockRUN.freq);
/* Configure FLL external reference divider (FRDIV). */
CLOCK_CONFIG_SetFllExtRefDiv(mcgConfig_BOARD_BootClockRUN.frdiv);
/* Set MCG to PEE mode. */
CLOCK_BootToPeeMode(mcgConfig_BOARD_BootClockRUN.oscsel,
kMCG_PllClkSelPll0,
&mcgConfig_BOARD_BootClockRUN.pll0Config);
/* Configure the Internal Reference clock (MCGIRCLK). */
CLOCK_SetInternalRefClkConfig(mcgConfig_BOARD_BootClockRUN.irclkEnableMode,
mcgConfig_BOARD_BootClockRUN.ircs,
mcgConfig_BOARD_BootClockRUN.fcrdiv);
/* Set the clock configuration in SIM module. */
CLOCK_SetSimConfig(&simConfig_BOARD_BootClockRUN);
/* Set SystemCoreClock variable. */
//SystemCoreClock = BOARD_BOOTCLOCKRUN_CORE_CLOCK;
SystemCoreClock = CLOCK_GetFreq(SYS_CLK);
BusClock = CLOCK_GetFreq(BUS_CLK);
}
It stacks at function CLOCK_SetPbeMode on
while ((MCG->S & (MCG_S_IREFST_MASK | MCG_S_CLKST_MASK)) !=
(MCG_S_IREFST(kMCG_FllSrcExternal) | MCG_S_CLKST(kMCG_ClkOutStatExt)))
{
}
How can I configure clocks?
