Merge pull request #103 from FRASTM/rtc_mix_ms

sketch using the Rtc mix mode with value in milliseconds

Author: fpistm

Diff for: examples/AlarmTimedWakeup/AlarmTimedWakeup.ino

@@ -1,9 +1,11 @@
 /*
-  AdvancedTimedWakeup
+  AlarmTimedWakeup
 
-  This sketch demonstrates the usage of Internal Interrupts to wakeup a chip in deep sleep mode.
+  This sketch demonstrates the usage of Internal Interrupts to wakeup a chip in deep sleep mode,
+  when the RTC is configured in BCD or MIX mode (BCD and BINARY)
 
   In this sketch:
+  - RTC is configured in BCD (default) or MIX mode (BCD and BINARY)
   - RTC date and time are configured.
   - Alarm is set to wake up the processor each 'atime' and called a custom alarm callback
   which increment a value and reload alarm with 'atime' offset.
@@ -19,7 +21,7 @@ STM32RTC& rtc = STM32RTC::getInstance();
 
 /* Change this value to set alarm match offset in millisecond */
 /* Note that STM32F1xx does not manage subsecond only second */
-static uint32_t atime = 567;
+static uint32_t atime = 600;
 
 // Declare it volatile since it's incremented inside an interrupt
 volatile int alarmMatch_counter = 0;
@@ -35,21 +37,32 @@ static byte month = 1;
 static byte year = 18;
 
 void setup() {
+#if defined(RTC_BINARY_NONE)
+  // Select RTC clock source: LSI_CLOCK, LSE_CLOCK or HSE_CLOCK.
+  // By default the LSI is selected as source.
+  // rtc.setClockSource(STM32RTC::LSE_CLOCK);
+  // Select the STM32RTC::MODE_BCD or STM32RTC::MODE_MIX
+  // By default the STM32RTC::MODE_BCD is selected.
+  // rtc.setBinaryMode(STM32RTC::MODE_BCD);
+  rtc.begin(true); /* reset the RTC else the binary mode is not changed */
+#else
   rtc.begin();
+#endif /* RTC_BINARY_NONE */
   rtc.setTime(hours, minutes, seconds);
   rtc.setDate(weekDay, day, month, year);
 
   pinMode(LED_BUILTIN, OUTPUT);
 
-  Serial.begin(9600);
+  Serial.begin(115200);
   while (!Serial) {}
+  Serial.println(" Start !");
 
   // Configure low power
   LowPower.begin();
   LowPower.enableWakeupFrom(&rtc, alarmMatch, &atime);
 
   // Configure first alarm in 2 second then it will be done in the rtc callback
-  rtc.setAlarmEpoch( rtc.getEpoch() + 2);
+  rtc.setAlarmEpoch(rtc.getEpoch() + 2);
 }
 
 void loop() {
@@ -63,8 +76,7 @@ void loop() {
   LowPower.deepSleep();
 }
 
-void alarmMatch(void* data)
-{
+void alarmMatch(void* data) {
   // This function will be called once on device wakeup
   // You can do some little operations here (like changing variables which will be used in the loop)
   // Remember to avoid calling delay() and long running functions since this functions executes in interrupt context
@@ -91,7 +103,7 @@ void alarmMatch(void* data)
   //Update epoch_ms - might need to add a second to epoch
   epoc_ms += _millis;
   if (epoc_ms >= 1000) {
-    sec ++;
+    sec++;
     epoc_ms -= 1000;
   }
 #endif

Diff for: examples/binAlarmTimedWakeup/binAlarmTimedWakeup.ino

@@ -0,0 +1,76 @@
+/*
+  binAlarmTimedWakeup
+
+  This sketch demonstrates the usage of Internal Interrupts to wakeup a chip in deep sleep mode.
+  when the RTC is configured in BINary mode (BIN_ONLY)
+
+  In this sketch:
+  - RTC in BINARY only for the stm32 that supports this mode
+  - Alarm is set to wake up the processor each 'atime' and called a custom alarm callback
+  which increment a value and reload alarm with 'atime' offset.
+
+  This example code is in the public domain.
+*/
+
+#include "STM32LowPower.h"
+#include <STM32RTC.h>
+
+/* Get the rtc object */
+STM32RTC& rtc = STM32RTC::getInstance();
+
+/* Change this value to set alarm match offset in millisecond */
+static uint32_t atime = 600;
+static uint32_t time_ts; /* value to get the binary time */
+
+// Declare it volatile since it's incremented inside an interrupt
+volatile int alarmMatch_counter = 0;
+
+void setup() {
+  // Select RTC clock source: LSI_CLOCK, LSE_CLOCK or HSE_CLOCK.
+  // By default the LSI is selected as source.
+  // rtc.setClockSource(STM32RTC::LSE_CLOCK);
+  // Select the STM32RTC::MODE_BIN
+  rtc.setBinaryMode(STM32RTC::MODE_BIN);
+  rtc.begin(true); /* reset the RTC else the mode is not changed */
+
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  Serial.begin(115200);
+  while (!Serial) {}
+  Serial.println(" Start !");
+
+  // Configure low power
+  LowPower.begin();
+  LowPower.enableWakeupFrom(&rtc, alarmMatch, &atime);
+
+  rtc.getEpoch(&time_ts);
+
+  // Configure first alarm in 2 seconds then it will be done in the rtc callback
+  rtc.setAlarmEpoch(0, STM32RTC::MATCH_SUBSEC, (time_ts + 2000), STM32RTC::ALARM_A);
+}
+
+void loop() {
+  Serial.print("Alarm Match: ");
+  Serial.print(alarmMatch_counter);
+  Serial.println(" times.");
+  Serial.flush();
+  digitalWrite(LED_BUILTIN, HIGH);
+  LowPower.deepSleep();
+  digitalWrite(LED_BUILTIN, LOW);
+  LowPower.deepSleep();
+}
+
+void alarmMatch(void* data) {
+  // This function will be called once on device wakeup
+  // You can do some little operations here (like changing variables which will be used in the loop)
+  // Remember to avoid calling delay() and long running functions since this functions executes in interrupt context
+  uint32_t _millis = 1000;
+
+  if (data != NULL) {
+    _millis = *(uint32_t*)data;
+  }
+
+  rtc.getEpoch(&time_ts);
+  alarmMatch_counter++;
+  rtc.setAlarmEpoch(0, STM32RTC::MATCH_SUBSEC, (time_ts + _millis), STM32RTC::ALARM_A);
+}