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https://github.com/adafruit/RTClib.git
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vinhill
@@ -7,7 +7,7 @@
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*/
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#include <RTClib.h>
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#include <Wire.h>
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// #include <Wire.h>
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RTC_DS3231 rtc;
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@@ -15,87 +15,87 @@ RTC_DS3231 rtc;
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#define CLOCK_INTERRUPT_PIN 2
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void setup() {
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Serial.begin(9600);
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Serial.begin(9600);
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// initializing the rtc
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if(!rtc.begin()) {
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Serial.println("Couldn't find RTC!");
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Serial.flush();
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abort();
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}
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if(rtc.lostPower()) {
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// this will adjust to the date and time at compilation
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rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
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}
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//we don't need the 32K Pin, so disable it
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rtc.disable32K();
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// Making it so, that the alarm will trigger an interrupt
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pinMode(CLOCK_INTERRUPT_PIN, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(CLOCK_INTERRUPT_PIN), onAlarm, FALLING);
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// set alarm 1, 2 flag to false (so alarm 1, 2 didn't happen so far)
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// if not done, this easily leads to problems, as both register aren't reset on reboot/recompile
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rtc.clearAlarm(1);
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rtc.clearAlarm(2);
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// stop oscillating signals at SQW Pin
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// otherwise setAlarm1 will fail
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rtc.writeSqwPinMode(DS3231_OFF);
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// turn off alarm 2 (in case it isn't off already)
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// again, this isn't done at reboot, so a previously set alarm could easily go overlooked
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rtc.disableAlarm(2);
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// schedule an alarm 10 seconds in the future
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if(!rtc.setAlarm1(
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rtc.now() + TimeSpan(10),
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DS3231_A1_Second // this mode triggers the alarm when the seconds match. See Doxygen for other options
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)) {
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Serial.println("Error, alarm wasn't set!");
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}else {
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Serial.println("Alarm will happen in 10 seconds!");
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}
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// initializing the rtc
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if(!rtc.begin()) {
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Serial.println("Couldn't find RTC!");
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Serial.flush();
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abort();
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}
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if(rtc.lostPower()) {
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// this will adjust to the date and time at compilation
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rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
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}
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//we don't need the 32K Pin, so disable it
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rtc.disable32K();
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// Making it so, that the alarm will trigger an interrupt
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pinMode(CLOCK_INTERRUPT_PIN, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(CLOCK_INTERRUPT_PIN), onAlarm, FALLING);
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// set alarm 1, 2 flag to false (so alarm 1, 2 didn't happen so far)
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// if not done, this easily leads to problems, as both register aren't reset on reboot/recompile
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rtc.clearAlarm(1);
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rtc.clearAlarm(2);
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// stop oscillating signals at SQW Pin
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// otherwise setAlarm1 will fail
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rtc.writeSqwPinMode(DS3231_OFF);
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// turn off alarm 2 (in case it isn't off already)
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// again, this isn't done at reboot, so a previously set alarm could easily go overlooked
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rtc.disableAlarm(2);
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// schedule an alarm 10 seconds in the future
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if(!rtc.setAlarm1(
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rtc.now() + TimeSpan(10),
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DS3231_A1_Second // this mode triggers the alarm when the seconds match. See Doxygen for other options
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)) {
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Serial.println("Error, alarm wasn't set!");
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}else {
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Serial.println("Alarm will happen in 10 seconds!");
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}
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}
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void loop() {
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// print current time
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char date[10] = "hh:mm:ss";
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rtc.now().toString(date);
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Serial.print(date);
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// the value at SQW-Pin (because of pullup 1 means no alarm)
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Serial.print(" SQW: ");
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Serial.print(digitalRead(CLOCK_INTERRUPT_PIN));
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// whether a alarm happened happened
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Serial.print(" Alarm1: ");
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Serial.print(rtc.alarmFired(1));
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// Serial.print(" Alarm2: ");
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// Serial.println(rtc.alarmFired(2));
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// control register values (see https://datasheets.maximintegrated.com/en/ds/DS3231.pdf page 13)
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// Serial.print(" Control: 0b");
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// Serial.println(read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL), BIN);
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// resetting SQW and alarm 1 flag
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// using setAlarm1, the next alarm could now be configurated
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if(rtc.alarmFired(1)) {
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rtc.clearAlarm(1);
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Serial.println("Alarm cleared");
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}
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delay(2000);
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// print current time
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char date[10] = "hh:mm:ss";
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rtc.now().toString(date);
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Serial.print(date);
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// the value at SQW-Pin (because of pullup 1 means no alarm)
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Serial.print(" SQW: ");
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Serial.print(digitalRead(CLOCK_INTERRUPT_PIN));
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// whether a alarm happened happened
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Serial.print(" Alarm1: ");
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Serial.print(rtc.alarmFired(1));
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// Serial.print(" Alarm2: ");
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// Serial.println(rtc.alarmFired(2));
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// control register values (see https://datasheets.maximintegrated.com/en/ds/DS3231.pdf page 13)
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// Serial.print(" Control: 0b");
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// Serial.println(read_i2c_register(DS3231_ADDRESS, DS3231_CONTROL), BIN);
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// resetting SQW and alarm 1 flag
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// using setAlarm1, the next alarm could now be configurated
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if(rtc.alarmFired(1)) {
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rtc.clearAlarm(1);
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Serial.println("Alarm cleared");
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}
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delay(2000);
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}
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void onAlarm() {
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Serial.println("Alarm occured!");
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Serial.println("Alarm occured!");
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}
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/*static uint8_t read_i2c_register(uint8_t addr, uint8_t reg) {
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Wire.beginTransmission(addr);
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Wire.write((byte)reg);
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Wire.endTransmission();
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Wire.beginTransmission(addr);
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Wire.write((byte)reg);
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Wire.endTransmission();
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Wire.requestFrom(addr, (byte)1);
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return Wire.read();
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Wire.requestFrom(addr, (byte)1);
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return Wire.read();
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}*/
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