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cpu/kinetis/rtt: clear subseconds when writing seconds

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Thomas Stilwell 2019-01-13 17:38:57 -08:00
parent a032070e82
commit 3ea75d1314
1 changed files with 2 additions and 0 deletions
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2
cpu/kinetis/periph/rtt.c
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@ -110,6 +110,8 @@ void rtt_set_counter(uint32_t counter)
{ {
/* Disable time counter before writing to the timestamp register */ /* Disable time counter before writing to the timestamp register */
bit_clear32(&RTC->SR, RTC_SR_TCE_SHIFT); bit_clear32(&RTC->SR, RTC_SR_TCE_SHIFT);
RTC->TPR = 0;
/* write TSR after TPR, as clearing TPR bit 14 will increment TSR */
RTC->TSR = counter; RTC->TSR = counter;
/* Enable when done */ /* Enable when done */
bit_set32(&RTC->SR, RTC_SR_TCE_SHIFT); bit_set32(&RTC->SR, RTC_SR_TCE_SHIFT);