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### Releases v1.0.3 1. Add simple examples with manual time input
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| /**************************************************************************************************************************** | ||
| RP2040_RTC_Alarm.ino | ||
| For RP2040-based boards using internal RTC | ||
| with WiFiNINA, ESP8266/ESP32 WiFi, ESP8266-AT, W5x00, ENC28J60, LAN8742A Ethernet modules/shields | ||
| Built by Khoi Hoang https://github.com/khoih-prog/RP2040_RTC | ||
| Licensed under MIT license | ||
| Version: 1.0.3 | ||
| Version Modified By Date Comments | ||
| ------- ----------- ---------- ----------- | ||
| 1.0.0 K Hoang 13/06/2021 Initial release to support RP2040-based boards using internal RTC | ||
| 1.0.1 K Hoang 14/06/2021 Add mbed_nano architecture to library.properties | ||
| 1.0.2 K Hoang 16/06/2021 Fix bug in display alarm time | ||
| 1.0.3 K Hoang 23/06/2021 Add simple example with manual time input | ||
| *****************************************************************************************************************************/ | ||
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| // Important notes: Currently, RP2040-based boards RTC has no battery backup. So the time will be lost when power down | ||
| // Therefore, NTP client is necessary to get NTP time and update RTC. | ||
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| #include "defines.h" | ||
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| #include <Timezone_Generic.h> // https://github.com/khoih-prog/Timezone_Generic | ||
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| ////////////////////////////////////////// | ||
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| // US Eastern Time Zone (New York, Detroit) | ||
| TimeChangeRule myDST = {"EDT", Second, Sun, Mar, 2, -240}; //Daylight time = UTC - 4 hours | ||
| TimeChangeRule mySTD = {"EST", First, Sun, Nov, 2, -300}; //Standard time = UTC - 5 hours | ||
| Timezone *myTZ; | ||
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| TimeChangeRule *tcr; //pointer to the time change rule, use to get TZ abbrev | ||
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| ////////////////////////////////////////// | ||
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| /* | ||
| typedef struct | ||
| { | ||
| int16_t year; ///< 0..4095 | ||
| int8_t month; ///< 1..12, 1 is January | ||
| int8_t day; ///< 1..28,29,30,31 depending on month | ||
| int8_t dotw; ///< 0..6, 0 is Sunday | ||
| int8_t hour; ///< 0..23 | ||
| int8_t min; ///< 0..59 | ||
| int8_t sec; ///< 0..59 | ||
| } datetime_t; | ||
| */ | ||
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| // Example set at 04:00:00 Wed 23 Jun 2021 UTC or 00:00:00 Wed 23 Jun 2021 EDT | ||
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| datetime_t currTime = { 2021, 6, 23, 3, 4, 0, 0 }; | ||
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| datetime_t alarmT; | ||
| volatile bool alarmTriggered = false; | ||
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| #define ALARM_AT_SECONDS 5 | ||
| #define ALARM_REPEAT_FOREVER true | ||
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| ////////////////////////////////////////// | ||
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| // This is ISR. Be careful. No Serial.print here. | ||
| void rtcCallback() | ||
| { | ||
| alarmTriggered = true; | ||
| } | ||
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| void set_RTC_Alarm(datetime_t *alarmTime) | ||
| { | ||
| rtc_set_alarm(alarmTime, rtcCallback); | ||
| } | ||
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| void setAlarmOnce(uint8_t alarmSeconds) | ||
| { | ||
| rtc_get_datetime(&alarmT); | ||
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| if ( alarmSeconds > alarmT.sec ) | ||
| alarmT.sec = alarmSeconds; | ||
| else | ||
| { | ||
| // Alarm in next minute | ||
| alarmT.sec = alarmSeconds; | ||
| alarmT.min += 1; | ||
| } | ||
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| set_RTC_Alarm(&alarmT); | ||
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| Serial.print("Set One-time Alarm @ alarmSeconds = "); Serial.println(alarmSeconds); | ||
| } | ||
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| void setAlarmRepeat(uint8_t alarmSeconds) | ||
| { | ||
| // Redundant, but without this, many times alarm not set !!! | ||
| rtc_get_datetime(&alarmT); | ||
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| alarmT.min = alarmT.hour = alarmT.day = alarmT.dotw = alarmT.month = alarmT.year = -1; | ||
| alarmT.sec = alarmSeconds; | ||
| set_RTC_Alarm(&alarmT); | ||
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| Serial.print("Set Repeatitive Alarm @ alarmSeconds = "); Serial.println(alarmSeconds); | ||
| } | ||
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| ////////////////////////////////////////// | ||
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| // format and print a time_t value, with a time zone appended. | ||
| void printDateTime(time_t t, const char *tz) | ||
| { | ||
| char buf[32]; | ||
| char m[4]; // temporary storage for month string (DateStrings.cpp uses shared buffer) | ||
| strcpy(m, monthShortStr(month(t))); | ||
| sprintf(buf, "%.2d:%.2d:%.2d %s %.2d %s %d %s", | ||
| hour(t), minute(t), second(t), dayShortStr(weekday(t)), day(t), m, year(t), tz); | ||
| Serial.println(buf); | ||
| } | ||
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| void setup() | ||
| { | ||
| Serial.begin(115200); | ||
| while (!Serial); | ||
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| delay(200); | ||
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| Serial.print(F("\nStart RP2040_RTC_Alarm on ")); Serial.println(BOARD_NAME); | ||
| Serial.println(RP2040_RTC_VERSION); | ||
| Serial.println(TIMEZONE_GENERIC_VERSION); | ||
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| myTZ = new Timezone(myDST, mySTD); | ||
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| // Start the RTC | ||
| rtc_init(); | ||
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| rtc_set_datetime(&currTime); | ||
| } | ||
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| bool setAlarmDone = false; | ||
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| void setAlarm() | ||
| { | ||
| #if ALARM_REPEAT_FOREVER | ||
| setAlarmRepeat(ALARM_AT_SECONDS); | ||
| #else | ||
| setAlarmOnce(ALARM_AT_SECONDS); | ||
| #endif | ||
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| setAlarmDone = true; | ||
| } | ||
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| void displayTime() | ||
| { | ||
| rtc_get_datetime(&currTime); | ||
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| // Display time from RTC | ||
| DateTime now = DateTime(currTime); | ||
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| time_t utc = now.get_time_t(); | ||
| time_t local = myTZ->toLocal(utc, &tcr); | ||
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| printDateTime(utc, "UTC"); | ||
| printDateTime(local, tcr -> abbrev); | ||
| } | ||
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| void displayRTCTime() | ||
| { | ||
| static unsigned long displayRTCTime_timeout = 0; | ||
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| #define DISPLAY_RTC_INTERVAL 10000L | ||
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| // Send status report every STATUS_REPORT_INTERVAL (60) seconds: we don't need to display frequently. | ||
| if ((millis() > displayRTCTime_timeout) || (displayRTCTime_timeout == 0)) | ||
| { | ||
| Serial.println("============================"); | ||
| displayTime(); | ||
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| displayRTCTime_timeout = millis() + DISPLAY_RTC_INTERVAL; | ||
| } | ||
| } | ||
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| void loop() | ||
| { | ||
| displayRTCTime(); | ||
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| if (!setAlarmDone) | ||
| { | ||
| setAlarm(); | ||
| } | ||
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| if (alarmTriggered) | ||
| { | ||
| alarmTriggered = false; | ||
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| Serial.println("============================"); | ||
| Serial.println("Alarm @ "); | ||
| displayTime(); | ||
| } | ||
| } |
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