Rtc mix mode with subseconds param. expressed in milliseconds

README.md

@@ -153,6 +153,30 @@ It is possible to use it thanks all alarm API with an extra argument:
     rtc.enableAlarm(rtc.MATCH_DHHMMSS, STM32RTC::ALARM_B);
 ```
 
+### Since STM32RTC version higher than 1.3.7
+_Get the RTC handle_
+
+* **`RTC_HandleTypeDef *RTC_GetHandle(void)`**
+
+_binary and mix modes_
+
+Some STM32 RTC have a binary mode with 32-bit free-running counter
+in addition to their BCD mode for calendar (for example stm32wl55).
+Combined with BCD this is the MIX mode. Only using the binary counter is the BIN mode.
+Three RTC functional modes are available:
+  - `STM32RTC::MODE_BCD`
+  - `STM32RTC::MODE_MIX`
+  - `STM32RTC::MODE_BIN`
+
+* **`Binary_Mode getBinaryMode(void);`**
+* **`void setBinaryMode(Binary_Mode mode);`**
+
+
+Any API using the Subsecond parameter is expressed in milliseconds
+whatever the RTC input clock. This parameter is [0..999] in MIX or BCD mode
+and [0..0xFFFFFFFF] in BIN mode. In this configuration, time and date registers
+are not used by the RTC.
+
 Refer to the Arduino RTC documentation for the other functions
 http://arduino.cc/en/Reference/RTC
 

examples/bin_onlyRTCAlarm/bin_onlyRTCAlarm.ino

@@ -0,0 +1,85 @@
+/*
+  mode BINary only RTC alarm
+
+  This sketch shows how to configure the alarm A & B of the RTC in BIN mode
+
+  Creation 12 Dec 2017
+  by Wi6Labs
+  Modified 03 Jul 2020
+  by Frederic Pillon for STMicroelectronics
+  Modified 03 sept 2023
+  by Francois Ramu for STMicroelectronics
+
+  This example code is in the public domain.
+
+  https://github.com/stm32duino/STM32RTC
+*/
+
+#include <STM32RTC.h>
+
+/* Get the rtc object */
+STM32RTC& rtc = STM32RTC::getInstance();
+
+uint32_t timeout;
+
+void setup()
+{
+  Serial.begin(115200);
+
+  // Select RTC clock source: LSI_CLOCK, LSE_CLOCK or HSE_CLOCK.
+  rtc.setClockSource(STM32RTC::LSE_CLOCK);
+
+  /* Configure the RTC mode */
+  rtc.setBinaryMode(STM32RTC::MODE_BIN);
+
+  /* in BIN mode time and Date register are not used, only the subsecond register for milisseconds */
+  rtc.begin(true, STM32RTC::HOUR_24);
+
+  /* wait for a while */
+  delay(300);
+
+  /* subsecond expressed in milliseconds */
+  Serial.printf("Start at %d ms \r\n", rtc.getSubSeconds());
+
+  /* Attach the callback function before enabling Interrupt */
+  rtc.attachInterrupt(alarmAMatch);
+
+  /* Program the AlarmA in 12 seconds */
+  rtc.setAlarmTime(0, 0, 0, 12000);
+  rtc.enableAlarm(rtc.MATCH_SUBSEC);
+  Serial.printf("Set Alarm A in 12s (at %d ms)\r\n", rtc.getAlarmSubSeconds());
+
+#ifdef RTC_ALARM_B
+  /* Program ALARM B in 600ms ms from now (keep timeout < 1000ms) */
+  timeout = rtc.getSubSeconds() + 600;
+
+  rtc.attachInterrupt(alarmBMatch, STM32RTC::ALARM_B);
+  rtc.setAlarmSubSeconds(timeout, STM32RTC::ALARM_B);
+  rtc.enableAlarm(rtc.MATCH_SUBSEC, STM32RTC::ALARM_B);
+  Serial.printf("Set Alarm B (in %d ms) at %d ms\r\n", 600,
+          rtc.getAlarmSubSeconds(STM32RTC::ALARM_B));
+#endif /* RTC_ALARM_B */
+
+}
+
+void loop()
+{
+
+}
+
+void alarmAMatch(void *data)
+{
+  UNUSED(data);
+  rtc.disableAlarm(STM32RTC::ALARM_A);
+  Serial.printf("Alarm A Match at %d ms \r\n", rtc.getSubSeconds());
+}
+
+#ifdef RTC_ALARM_B
+void alarmBMatch(void *data)
+{
+  UNUSED(data);
+  rtc.disableAlarm(STM32RTC::ALARM_B); /* Else it will trig again */
+  Serial.printf("Alarm B Match at %d ms\r\n", rtc.getSubSeconds());
+}
+#endif /* RTC_ALARM_B */
+

examples/mixRTCAlarm/mixRTCAlarm.ino

@@ -0,0 +1,99 @@
+/*
+  mode Mix RTC alarm
+
+  This sketch shows how to configure the alarm A & B (if exists)
+  of the RTC in MIX or BCD (BINARY none) mode
+
+  Creation 12 Dec 2017
+  by Wi6Labs
+  Modified 03 Jul 2020
+  by Frederic Pillon for STMicroelectronics
+  Modified 03 Jul 2023
+  by Francois Ramu for STMicroelectronics
+
+  This example code is in the public domain.
+
+  https://github.com/stm32duino/STM32RTC
+*/
+
+#include <STM32RTC.h>
+
+/* Get the rtc object */
+STM32RTC& rtc = STM32RTC::getInstance();
+
+/* Change these values to set the current initial time */
+const byte seconds = 06;
+const byte minutes = 22;
+const byte hours = 16;
+
+/* Change these values to set the current initial date */
+const byte day = 25;
+const byte month = 6;
+const byte year = 23;
+
+uint32_t timeout;
+
+void setup()
+{
+  Serial.begin(115200);
+
+  // Select RTC clock source: LSI_CLOCK, LSE_CLOCK or HSE_CLOCK.
+  rtc.setClockSource(STM32RTC::LSE_CLOCK);
+
+  /* Configure the RTC mode : STM32RTC::MODE_MIX or STM32RTC::MODE_BCD */
+  rtc.setBinaryMode(STM32RTC::MODE_BCD);
+
+  rtc.begin(true, STM32RTC::HOUR_24);
+
+  rtc.setTime(hours, minutes, seconds);
+  rtc.setDate(day, month, year);
+
+  /* wait for a while */
+  delay(300);
+
+  Serial.printf("Start at %02d:%02d:%02d.%03d\r\n",
+          rtc.getHours(), rtc.getMinutes(), rtc.getSeconds(), rtc.getSubSeconds());
+
+  /* Attach the callback function before enabling Interrupt */
+  rtc.attachInterrupt(alarmAMatch);
+
+  /* Program the AlarmA in 12 seconds */
+  rtc.setAlarmDay(day);
+  rtc.setAlarmTime(hours, minutes, seconds + 12);
+  rtc.enableAlarm(rtc.MATCH_DHHMMSS);
+  Serial.printf("Set Alarm A in 12s (at %02d:%02d:%02d)\r\n",
+          rtc.getAlarmHours(), rtc.getAlarmMinutes(), rtc.getAlarmSeconds());
+
+#ifdef RTC_ALARM_B
+  /* Program ALARM B in 600ms ms from now (keep timeout < 1000ms) */
+  timeout = rtc.getSubSeconds() + 600;
+
+  rtc.attachInterrupt(alarmBMatch, STM32RTC::ALARM_B);
+  rtc.setAlarmSubSeconds(timeout, STM32RTC::ALARM_B);
+  rtc.enableAlarm(rtc.MATCH_SUBSEC, STM32RTC::ALARM_B);
+  Serial.printf("Set Alarm B (in %d ms) at %d ms\r\n", 600,
+          rtc.getAlarmSubSeconds(STM32RTC::ALARM_B));
+#endif /* RTC_ALARM_B */
+}
+
+void loop()
+{
+  /* Just wait for Alarm */
+}
+
+void alarmAMatch(void *data)
+{
+  UNUSED(data);
+  rtc.disableAlarm(STM32RTC::ALARM_A);
+  Serial.printf("Alarm A Match at %02d:%02d:%02d\r\n",
+          rtc.getHours(), rtc.getMinutes(), rtc.getSeconds());
+}
+
+#ifdef RTC_ALARM_B
+void alarmBMatch(void *data)
+{
+  UNUSED(data);
+  rtc.disableAlarm(STM32RTC::ALARM_B);
+  Serial.printf("Alarm B Match at %d ms\r\n", rtc.getSubSeconds());
+}
+#endif /* RTC_ALARM_B */

keywords.txt

@@ -13,6 +13,10 @@ STM32RTC	KEYWORD1
 #######################################
 
 getInstance	KEYWORD2
+getHandle	KEYWORD2
+
+getBinaryMode	KEYWORD2
+setBinaryMode	KEYWORD2
 
 getWeekDay	KEYWORD2
 getDay	KEYWORD2
@@ -85,6 +89,7 @@ IS_HOUR_FORMAT	KEYWORD2
 # Constants (LITERAL1)
 #######################################
 MATCH_OFF	LITERAL1
+MATCH_SUBSEC	LITERAL1
 MATCH_SS	LITERAL1
 MATCH_MMSS	LITERAL1
 MATCH_HHMMSS	LITERAL1
@@ -100,3 +105,6 @@ LSI_CLOCK	LITERAL1
 HSE_CLOCK	LITERAL1
 ALARM_A	LITERAL1
 ALARM_B	LITERAL1
+MODE_BCD	LITERAL1
+MODE_BIN	LITERAL1
+MODE_MIX	LITERAL1