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Bugfix for #12374 

Use an RTCC retention register to keep track of user timebase for RTC API. RTC and LP Ticker implementations use the same counter, but they shouldn't share timebases.
pull/12509/head
Steven Cooreman 2020-02-25 11:44:12 +01:00
parent 1629103fb1
commit 9bc59fe2d7
1 changed files with 3 additions and 9 deletions
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12
targets/TARGET_Silicon_Labs/TARGET_EFM32/rtcc.c
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@ -56,6 +56,7 @@ void rtc_init(void)
rtcc_init.presc = rtccCntPresc_32768;
RTCC_Init(&rtcc_init);
RTCC_Enable(true);
RTCC->RET[0].REG = 0;
}
void rtc_free(void)
@ -71,20 +72,13 @@ int rtc_isenabled(void)
time_t rtc_read(void)
{
return RTCC_CounterGet();
return RTCC_CounterGet() + RTCC->RET[0].REG;
}
void rtc_write(time_t t)
{
core_util_critical_section_enter();
uint32_t diff = t - RTCC_CounterGet();
lptick_offset += diff;
if(RTCC_IntGetEnabled() & RTCC_IF_CC0) {
RTCC->CC[0].CCV += diff << 15;
}
RTCC_CounterSet(t);
RTCC->RET[0].REG = t - RTCC_CounterGet();
core_util_critical_section_exit();
}