Configuring K02 for external Oscillator not working.

josephgundel — Mon, 29 Jun 2015 17:23:06 GMT

I have no problem when i am using internal oscillator but I need to use an external 32.768 Khz crystal the micro gets stuck here -> HWTIMER_SYS_SystickGetTime() at fsl_hwtimer_systick.c:357 0x4cd8

Thread [1] <main> (Suspended : Signal : SIGINT:Interrupt)

HWTIMER_SYS_SystickGetTime() at fsl_hwtimer_systick.c:357 0x4cd8

HWTIMER_SYS_GetTime() at fsl_hwtimer.c:376 0x4b54

_bsp_get_hwticks() at init_bsp.c:330 0x467a

_time_notify_kernel() at time.c:2,178 0x4592

HWTIMER_SYS_SystickIsr() at fsl_hwtimer_systick.c:113 0x4bb2

_isr_execute() at dispatch.S:644 0x1bda

<...more frames...>

Here is my configuration:


#define CPU_XTAL_CLK_HZ	32768U	/* Value of the external crystal or oscillator clock frequency of the system oscillator (OSC) in Hz */
#define CPU_XTAL32k_CLK_HZ	0U	/* No RTC clock available */
#define CPU_INT_SLOW_CLK_HZ	32768U	/* Value of the slow internal oscillator clock frequency in Hz */
#define CPU_INT_FAST_CLK_HZ	4000000U	/* Value of the fast internal oscillator clock frequency in Hz */
#define CPU_INT_IRC_CLK_HZ	48000000U	/* Value of the 48M internal oscillator clock frequency in Hz */

#define DEFAULT_SYSTEM_CLOCK	95977472U	/* Default System clock value */
#define MCG_MODE	MCG_MODE_FEE /* Clock generator mode */

/* MCG_C1: CLKS=0,FRDIV=0,IREFS=0,IRCLKEN=1,IREFSTEN=0 */

#define SYSTEM_MCG_C1_VALUE

0x02U

/* MCG_C1 */

/* MCG_C2: LOCRE0=0,FCFTRIM=0,RANGE=0,HGO=0,EREFS=1,LP=0,IRCS=0 */

#define SYSTEM_MCG_C2_VALUE

0x04U

/* MCG_C2 */

/* MCG_C4: DMX32=1,DRST_DRS=3,FCTRIM=0,SCFTRIM=0 */

#define SYSTEM_MCG_C4_VALUE

0xE0U

/* MCG_C4 */

/* MCG_SC: ATME=0,ATMS=0,ATMF=0,FLTPRSRV=0,FCRDIV=0,LOCS0=0 */

#define SYSTEM_MCG_SC_VALUE

0x00U

/* MCG_SC */

/* MCG_C5: */

#define SYSTEM_MCG_C5_VALUE

0x00U

/* MCG_C5 */

/* MCG_C6: CME=0 */

#define SYSTEM_MCG_C6_VALUE

0x00U

/* MCG_C6 */

/* MCG_C7: OSCSEL=0 */

#define SYSTEM_MCG_C7_VALUE

0x00U

/* MCG_C7 */

/* OSC_CR: ERCLKEN=1,EREFSTEN=0,SC2P=0,SC4P=0,SC8P=0,SC16P=0 */

#define SYSTEM_OSC_CR_VALUE	0x80U	/* OSC_CR */
#define SYSTEM_SMC_PMCTRL_VALUE	0x60U	/* SMC_PMCTRL */

/* SIM_CLKDIV1: OUTDIV1=0,OUTDIV2=1,OUTDIV4=3 */

#define SYSTEM_SIM_CLKDIV1_VALUE

0x01030000U

/* SIM_CLKDIV1 */

/* SIM_SOPT1: OSC32KSEL=2,OSC32KOUT=0,RAMSIZE=0 */

#define SYSTEM_SIM_SOPT1_VALUE

0x00080000U

/* SIM_SOPT1 */

/* SIM_SOPT2: PLLFLLSEL=0,TRACECLKSEL=0,CLKOUTSEL=0 */

#define SYSTEM_SIM_SOPT2_VALUE

0x00U

/* SIM_SOPT2 */

Re: Configuring K02 for external Oscillator not working.

kerryzhou — Wed, 01 Jul 2015 07:52:21 GMT

Hi Joesph Gundel,

SystickGetTime is the systick module operation, the full function is like this :

static _hwtimer_error_code_t HWTIMER_SYS_SystickGetTime(hwtimer_t *hwtimer, hwtimer_time_t *time)

{

uint32_t tempVal;

assert(NULL != hwtimer);

assert(NULL != time);

/* Enter critical section to avoid disabling interrupt from pit for very long time */

OSA_EnterCritical(kCriticalDisableInt);

SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;

time->ticks = hwtimer->ticks;

tempVal = SysTick->VAL;

/* Check systick pending interrupt flag */

if (SCB->ICSR & SCB_ICSR_PENDSTSET_Msk)

{

SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;

OSA_ExitCritical(kCriticalDisableInt);

time->subTicks = hwtimer->modulo - 1U;

}

else

{

SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;

OSA_ExitCritical(kCriticalDisableInt);

/* interrupt flag is set upon 1->0 transition, not upon reload - wrap around */

time->subTicks = SysTick->LOAD - tempVal + 1U;

}

return kHwtimerSuccess;

}

Which line you are stopping? You can comment the systick operation, to check whether your can enter in main function.

Besides, you can define

#define SYSTEM_SMC_PMCTRL_VALUE

0x00U

/* SMC_PMCTRL */

Just work in run mode, instead of fast run mode, then check whether you can work ok?

Wish it helps you!

Regards,

Jingjing

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Configuring K02 for external Oscillator not working.

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