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Merge pull request #13907 from petroborys/master 

Workaround to fix RTC-reset issue on the EFM32GG11_STK3701
pull/13959/head
Martin Kojtal 2020-12-09 08:57:08 +00:00 committed by GitHub
parent e5e315eb80 e37aeb0c74
commit 3a71f314d6
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 1 deletions
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18
targets/TARGET_Silicon_Labs/TARGET_EFM32/rtcc.c
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@ -51,12 +51,25 @@ void rtc_init(void)
RMU_ResetControl(rmuResetPin, rmuResetModeFull); RMU_ResetControl(rmuResetPin, rmuResetModeFull);
/* Set up the RTCC and let it run, Forrest, run */ /* Set up the RTCC and let it run, Forrest, run */
/* Save time if it has been set */
time_t t = 0;
if (RTCC->RET[1].REG == 0) {
t = rtc_read();
}
RTCC_Reset(); RTCC_Reset();
RTCC_Init_TypeDef rtcc_init = RTCC_INIT_DEFAULT; RTCC_Init_TypeDef rtcc_init = RTCC_INIT_DEFAULT;
rtcc_init.presc = rtccCntPresc_32768; rtcc_init.presc = rtccCntPresc_32768;
RTCC_Init(&rtcc_init); RTCC_Init(&rtcc_init);
RTCC_Enable(true); RTCC_Enable(true);
RTCC->RET[0].REG = 0;
/* Update time */
if (RTCC->RET[1].REG == 0) {
rtc_write(t);
} else {
RTCC->RET[0].REG = 0;
}
} }
void rtc_free(void) void rtc_free(void)
@ -79,6 +92,9 @@ void rtc_write(time_t t)
{ {
core_util_critical_section_enter(); core_util_critical_section_enter();
RTCC->RET[0].REG = t - RTCC_CounterGet(); RTCC->RET[0].REG = t - RTCC_CounterGet();
/* Record that the time has been set */
RTCC->RET[1].REG = 0;
core_util_critical_section_exit(); core_util_critical_section_exit();
} }