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Handle reset time #15

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Merged
merged 1 commit into from
Feb 26, 2019
Merged

Handle reset time #15

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17 changes: 17 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,23 @@ _Time and date configuration (added for convenience)_
* **`void getTime(uint8_t *hours, uint8_t *minutes, uint8_t *seconds, uint32_t *subSeconds, AM_PM *period = NULL)`**
* **`void getDate(uint8_t *weekDay, uint8_t *day, uint8_t *month, uint8_t *year)`**

### Since STM32 Core version > 1.5.0
_Reset time management_
By default, if a time is set it will not be reset afer a reboot.

Using `begin(true)` or `begin(true, HOUR_24)` will reset the RTC registers.

To know if a time has already been set use:
* **`bool isTimeSet(void)`**
```
if (!rtc.isTimeSet()) {
// Set the time
rtc.setHours(hours);
rtc.setMinutes(minutes);
rtc.setSeconds(seconds);
}
```

Refer to the Arduino RTC documentation for the other functions
http://arduino.cc/en/Reference/RTC

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8 changes: 7 additions & 1 deletion src/STM32RTC.cpp
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Expand Up @@ -45,6 +45,7 @@

// Initialize static variable
bool STM32RTC::_configured = false;
bool STM32RTC::_reset = false;

/**
* @brief initializes the RTC
Expand All @@ -54,6 +55,7 @@ bool STM32RTC::_configured = false;
*/
void STM32RTC::begin(bool resetTime, Hour_Format format)
{
_reset = resetTime;
if(resetTime == true) {
_configured = false;
_alarmEnabled = false;
Expand All @@ -71,7 +73,11 @@ void STM32RTC::begin(Hour_Format format)
if(_configured == false) {
RTC_init((format == HOUR_12)? HOUR_FORMAT_12: HOUR_FORMAT_24,
(_clockSource == LSE_CLOCK)? ::LSE_CLOCK:
(_clockSource == HSE_CLOCK)? ::HSE_CLOCK : ::LSI_CLOCK);
(_clockSource == HSE_CLOCK)? ::HSE_CLOCK : ::LSI_CLOCK
#if defined(STM32_CORE_VERSION) && (STM32_CORE_VERSION > 0x01050000)
, _reset
#endif
);
// Must be set before call of sync methods
_configured = true;
syncTime();
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9 changes: 9 additions & 0 deletions src/STM32RTC.h
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Expand Up @@ -185,12 +185,21 @@ class STM32RTC {
bool isAlarmEnabled(void) {
return _alarmEnabled;
}
bool isTimeSet(void) {
#if defined(STM32_CORE_VERSION) && (STM32_CORE_VERSION > 0x01050000)
return RTC_IsTimeSet();
#else
return false;
#endif
}

friend class STM32LowPower;

private:
STM32RTC(void): _clockSource(LSI_CLOCK) {}

static bool _configured;
static bool _reset;

AM_PM _hoursPeriod;
uint8_t _hours;
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