Add isWatchdogFired for Watchdog TimerA on PCF8523

adafruit · Jun 8, 2024 · 001f729 · 001f729
1 parent 5c40554
commit 001f729
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diff --git a/src/RTC_PCF8523.cpp b/src/RTC_PCF8523.cpp
@@ -137,6 +137,19 @@ void RTC_PCF8523::enableAlarm() {
                  read_register(PCF8523_CONTROL_1) | (1 << 1)); // Enable AIE
 }
 
+/**************************************************************************/
+/*!
+    @brief  Check Watchdog TimerA fired, isWatchdogFired must be read at the
+    very beginning, because flag is read-only and cleared by reading
+    register Control_2
+    @return 1 if a Watchdog TimerA fired
+*/
+/**************************************************************************/
+
+bool RTC_PCF8523::isWatchdogFired(void) {
+  return (read_register(PCF8523_CONTROL_2) & (1 << 7)); // Check WTAF
+}
+
 /**************************************************************************/
 /*!
     @brief  Check Alarm fired

diff --git a/src/RTClib.h b/src/RTClib.h
@@ -425,6 +425,7 @@ class RTC_PCF8523 : RTC_I2C {
   void adjust(const DateTime &dt);
   bool lostPower(void);
   bool initialized(void);
+  bool isWatchdogFired(void);
   bool isAlarmFired(void);
   bool isAnyAlarmSetup(void);
   DateTime now();