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Merge pull request #2767 from bapclenet/samr21/RTC

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samr21/RTC
This commit is contained in:
Peter Kietzmann 2015-04-10 11:11:00 +02:00
commit 7c870f8730
1 changed files with 7 additions and 7 deletions
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14
cpu/samd21/periph/rtc.c
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@ -44,17 +44,17 @@ void rtc_init(void)
/* 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;
/* 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_OSC32K | GCLK_GENCTRL_ID(2) | GCLK_GENCTRL_DIVSEL );
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);