void _rtc_handler(int argc, char **argv)
{
if (argc < 2) {
_rtc_usage();
}
else if (strncmp(argv[1], "init", 4) == 0) {
rtc_init();
}
else if (strncmp(argv[1], "poweron", 7) == 0) {
rtc_poweron();
}
else if (strncmp(argv[1], "poweroff", 8) == 0) {
rtc_poweroff();
}
else if (strncmp(argv[1], "clearalarm", 8) == 0) {
rtc_clear_alarm();
}
else if (strncmp(argv[1], "getalarm", 8) == 0) {
_rtc_getalarm();
}
else if (strncmp(argv[1], "setalarm", 8) == 0) {
_rtc_setalarm(argv + 2);
}
else if (strncmp(argv[1], "gettime", 7) == 0) {
_rtc_gettime();
}
else if (strncmp(argv[1], "settime", 7) == 0) {
_rtc_settime(argv + 2);
}
else {
printf("unknown command: %s\n", argv[1]);
}
}
void rtc_init(void)
{
RtcMode2 *rtcMode2 = &(RTC_DEV);
/* Turn on power manager for RTC */
PM->APBAMASK.reg |= PM_APBAMASK_RTC;
/* RTC uses External 32,768KHz Oscillator (OSC32K isn't accurate enough p1075/1138)*/
SYSCTRL->XOSC32K.reg = SYSCTRL_XOSC32K_ONDEMAND |
SYSCTRL_XOSC32K_EN32K |
SYSCTRL_XOSC32K_XTALEN |
SYSCTRL_XOSC32K_STARTUP(6) |
SYSCTRL_XOSC32K_ENABLE;
/* Setup clock GCLK2 with OSC32K divided by 32 */
GCLK->GENDIV.reg = GCLK_GENDIV_ID(2)|GCLK_GENDIV_DIV(4);
while (GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY);
GCLK->GENCTRL.reg = (GCLK_GENCTRL_GENEN | GCLK_GENCTRL_SRC_XOSC32K | GCLK_GENCTRL_ID(2) | GCLK_GENCTRL_DIVSEL );
while (GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY);
GCLK->CLKCTRL.reg = (uint32_t)((GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK2 | (RTC_GCLK_ID << GCLK_CLKCTRL_ID_Pos)));
while (GCLK->STATUS.bit.SYNCBUSY);
/* DISABLE RTC MASTER */
while (rtcMode2->STATUS.reg & RTC_STATUS_SYNCBUSY);
rtc_poweroff();
/* Reset RTC */
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtcMode2->CTRL.reg= RTC_MODE2_CTRL_SWRST;
while (rtcMode2->STATUS.bit.SYNCBUSY);
/* RTC config with RTC_MODE2_CTRL_CLKREP = 0 (24h) */
rtcMode2->CTRL.reg = RTC_MODE2_CTRL_PRESCALER_DIV1024|RTC_MODE2_CTRL_MODE_CLOCK;
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtcMode2->INTENSET.reg = RTC_MODE2_INTENSET_OVF;
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtc_poweron();
}
void rtc_init(void)
{
RtcMode2 *rtcMode2 = &(RTC_DEV);
/* Turn on power manager for RTC */
PM->APBAMASK.reg |= PM_APBAMASK_RTC;
SYSCTRL->OSC32K.bit.ENABLE = 0;
SYSCTRL->OSC32K.bit.ONDEMAND = 1;
SYSCTRL->OSC32K.bit.RUNSTDBY = 0;
SYSCTRL->OSC32K.bit.EN1K = 1;
SYSCTRL->OSC32K.bit.EN32K = 1;
SYSCTRL->OSC32K.bit.ENABLE = 1;
/* Setup clock GCLK2 with OSC32K divided by 32 */
GCLK->GENDIV.reg = GCLK_GENDIV_ID(2)|GCLK_GENDIV_DIV(4);
while (GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY);
GCLK->GENCTRL.reg = (GCLK_GENCTRL_GENEN | GCLK_GENCTRL_SRC_OSC32K | GCLK_GENCTRL_ID(2) | GCLK_GENCTRL_DIVSEL );
while (GCLK->STATUS.reg & GCLK_STATUS_SYNCBUSY);
GCLK->CLKCTRL.reg = (uint32_t)((GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK2 | (RTC_GCLK_ID << GCLK_CLKCTRL_ID_Pos)));
while (GCLK->STATUS.bit.SYNCBUSY);
/* DISABLE RTC MASTER */
while (rtcMode2->STATUS.reg & RTC_STATUS_SYNCBUSY);
rtc_poweroff();
/* Reset RTC */
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtcMode2->CTRL.reg= RTC_MODE2_CTRL_SWRST;
while (rtcMode2->STATUS.bit.SYNCBUSY);
/* RTC config with RTC_MODE2_CTRL_CLKREP = 0 (24h) */
rtcMode2->CTRL.reg = RTC_MODE2_CTRL_PRESCALER_DIV1024|RTC_MODE2_CTRL_MODE_CLOCK;
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtcMode2->INTENSET.reg = RTC_MODE2_INTENSET_OVF;
while (rtcMode2->STATUS.bit.SYNCBUSY);
rtc_poweron();
}
void rtc_init(void)
{
/* Turn on power manager for RTC */
/* Already done in cpu_init() */
/* MCLK->APBAMASK.reg |= MCLK_APBAMASK_RTC; */
/* DISABLE RTC MASTER */
rtc_poweroff();
#if EXTERNAL_OSC32_SOURCE
/* RTC uses External 32,768KHz Oscillator */
OSC32KCTRL->XOSC32K.reg = OSC32KCTRL_XOSC32K_XTALEN
| OSC32KCTRL_XOSC32K_EN1K
| OSC32KCTRL_XOSC32K_RUNSTDBY
| OSC32KCTRL_OSC32K_ENABLE;
/* Wait XOSC32K Ready */
while (OSC32KCTRL->STATUS.bit.XOSC32KRDY==0);
/* RTC source clock is external oscillator at 1kHz */
OSC32KCTRL->RTCCTRL.reg = OSC32KCTRL_RTCCTRL_RTCSEL_XOSC1K;
#endif /* EXTERNAL_OSC32_SOURCE */
#if INTERNAL_OSC32_SOURCE
uint32_t * pCalibrationArea;
uint32_t osc32kcal;
/* Read OSC32KCAL, calibration data for OSC32 !!! */
pCalibrationArea = (uint32_t*) NVMCTRL_OTP5;
osc32kcal = ( (*pCalibrationArea) & 0x1FC0 ) >> 6;
/* RTC use Low Power Internal Oscillator at 1kHz */
OSC32KCTRL->OSC32K.reg = OSC32KCTRL_OSC32K_RUNSTDBY
| OSC32KCTRL_OSC32K_EN1K
| OSC32KCTRL_OSC32K_CALIB(osc32kcal)
| OSC32KCTRL_OSC32K_ENABLE;
/* Wait OSC32K Ready */
while (OSC32KCTRL->STATUS.bit.OSC32KRDY==0);
/* RTC uses internal 32,768KHz Oscillator */
OSC32KCTRL->RTCCTRL.reg = OSC32KCTRL_RTCCTRL_RTCSEL_OSC1K;
#endif /* INTERNAL_OSC32_SOURCE */
#if ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE
/* RTC uses Ultra Low Power internal 32,768KHz Oscillator */
OSC32KCTRL->RTCCTRL.reg = OSC32KCTRL_RTCCTRL_RTCSEL_ULP1K;
#endif /* ULTRA_LOW_POWER_INTERNAL_OSC_SOURCE */
/* Software Reset the RTC */
RTC->MODE2.CTRLA.bit.SWRST = 1;
/* Wait end of reset */
while (RTC->MODE2.CTRLA.bit.SWRST);
/* RTC config with RTC_MODE2_CTRL_CLKREP = 0 (24h) */
RTC->MODE2.CTRLA.reg = RTC_MODE2_CTRLA_PRESCALER_DIV1024 | /* CLK_RTC_CNT = 1KHz / 1024 -> 1Hz */
#if (SAML21XXXB) || (SAMR30)
RTC_MODE2_CTRLA_CLOCKSYNC | /* Clock Read Synchronization Enable */
#endif
RTC_MODE2_CTRLA_MODE_CLOCK; /* Mode 2: Clock/Calendar */
/* Clear interrupt flags */
RTC->MODE2.INTFLAG.reg |= RTC_MODE2_INTFLAG_OVF;
RTC->MODE2.INTFLAG.reg |= RTC_MODE2_INTFLAG_ALARM0;
rtc_poweron();
}
