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ivan 2021-03-13 15:04:31 +00:00
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This source code is released under the DWTW license.
This program is free software; you can redistribute it and/or modify it under the terms of the Do What Thou Wilt License. This program is free software; you can redistribute it and/or modify it under the terms of the Do What Thou Wilt License.
Boundless Public License Boundless Public License

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# dclock # Erisian digital clock
Digital erisian clock By default, it shows the erisian time (hours:minutes). Pressing the button temporary changes the mode to: erisian time (minutes:seconds), date (season and day), day of week, yold.
Used hardware modules: DS1307 Real Time Clock and TM1637 Digit Display
Check timezoneOffset variable for your local timezone.
https://discordia.fandom.com/wiki/Erisian_Time
![dclock](https://dev.ussr.win/zlax/dclock/raw/branch/master/dclock_bb.jpg)

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// Erisian digital clock - v0.5
#include <Arduino.h>
#include <TimeLib.h>
#include <Thread.h>
#include <DS1307RTC.h>
#include <SevenSegmentExtended.h> // DisplayLib // Extended TM1637 library https://github.com/bremme/arduino-tm1637
const byte PIN_CLK = 2; // DisplaySetting // CLK pin
const byte PIN_DIO = 3; // DisplaySetting // DIO pin
const byte buttonPin = 4; // ButtonSetting // Button pin (a 10K resistor is necessary)
SevenSegmentExtended display(PIN_CLK, PIN_DIO); // DisplaySetting
Thread mainThread = Thread(); // mainThread
long buttonPressed = 0; // Button press time counter
long previousButtonMillis = 0; // Time of last button press
byte viewMode = 0; // View mode after pressing button
int buttonInterval = 21600; // Interval for showing viewMode after pressing button
int buttonLongPress = 1728; // Long button press interval
int mainCheck = 108; // The main interval is an eighth of a decimal second
byte octavo = 0; // Eight-count counter
byte colon = 0; // Colon status
float erisiansec; // Erisian second
// Custom settings:
int brightnessPercent = 32; // Display brightness percentage value
long timezoneOffset = (-28800); // Erisian timezoneOffset. Formula for calculating: ((-5 christian chours) - (GMT hours))
// Examples:
// GMT+3: ( (-5)-(+3) )*60*60 = -28800
// GMT-0: ( (-5)-(0) )*60*60 = -18000
// GMT-3: ( (-5)-(-3) )*60*60 = -7200
// GMT-5: ( (-5)-(-5) )*60*60 = 0
// GMT-7: ( (-5)-(-7) )*60*60 = 7200
// The beginning of Discordian day (0 hours, 0 minutes, 0 seconds) coincides
// with the beginning of Christian day on Easter Island on winter time (GMT-5).
// Details: https://discordia.fandom.com/wiki/Erisian_Time
void setup() {
Serial.begin(9600); // Initializes the Serial connection @ 9600 baud for debug
display.begin(); // Display setting, initializes the display
display.setBacklight(brightnessPercent); // Display brightness setting
while (!Serial); // Wait until Arduino Serial Monitor opens
setSyncProvider(RTC.get); // The function to get the time from the RTC
if(timeStatus()!= timeSet) { // Checking the time setting
Serial.println("Unable to sync with the RTC");
display.print("_time_not_set_"); // Shows warning "time not set"
} else {
Serial.println("RTC has set the system time");
display.print("HAIL_EriS"); // Shows display initialization
}
pinMode(buttonPin, INPUT); // Button setting
// Main thread thread initialization:
mainThread.onRun(mainLoop);
mainThread.setInterval(mainCheck);
}
void loop() {
// Main thread:
if (mainThread.shouldRun())
mainThread.run();
// Time check:
if (timeStatus() != timeSet)
display.print("SEt tiMe");
}
void mainLoop() {
// Counting an eighth part of a decimal second:
octavo++;
if (octavo == 8) octavo = 0;
// Update display every decimal second:
if (octavo == 0) {
if (viewMode == 0) {
dtime();
} else if (viewMode == 1) {
dtime();
} else if (viewMode == 2) {
ddate();
} else if (viewMode == 3) {
ddate();
} else if (viewMode == 4) {
dyold();
}
}
// Resets the view mode to the default state after buttonInterval expires:
if (millis() - previousButtonMillis > buttonInterval) viewMode = 0;
// Check the button state:
if (digitalRead(buttonPin) == HIGH) {
buttonPressed = buttonPressed + mainCheck;
if (buttonPressed > buttonLongPress) {
buttonPressed = 0;
longPress();
}
} else {
if (buttonPressed > 0) {
if (viewMode < 4) viewMode += 1;
else viewMode = 0;
buttonPressed = 0;
previousButtonMillis = millis();
}
}
}
void dtime() {
// Calculating discordian time:
uint32_t timec;
long christiansec;
float dtimeconv;
timec = now() + timezoneOffset;
christiansec = timec % 86400;
dtimeconv = float(86400) / float(christiansec);
erisiansec = float(100000) / dtimeconv;
if (viewMode == 0) dtimeHM();
else if (viewMode == 1) dtimeMS();
else dtimeHM();
colon = !colon;
display.setColonOn(colon);
}
void dtimeHM() {
// Displaying of erisian hours and minutes:
int dhour;
dhour = int(erisiansec / float(10000));
int dminute;
dminute = (long(erisiansec) % 10000) / 100;
byte rawData[4];
rawData[0] = display.encode(' ');
rawData[1] = display.encode(dhour);
rawData[2] = display.encode(dminute / 10);
rawData[3] = display.encode(dminute % 10);
display.printRaw(rawData);
}
void dtimeMS() {
// Displaying of erisian minutes and seconds:
int dminute;
dminute = (long(erisiansec) % 10000) / 100;
int dsecond;
dsecond = (long(erisiansec) % 100);
byte rawData[4];
rawData[0] = display.encode(dminute / 10);
rawData[1] = display.encode(dminute % 10);
rawData[2] = display.encode(dsecond / 10);
rawData[3] = display.encode(dsecond % 10);
display.printRaw(rawData);
}
void ddate() {
// Calculating and displaying discordian date:
uint32_t timec;
timec = now() + timezoneOffset;
byte dseason;
short dday;
short daynumber;
short y = year(timec);
short m = month(timec);
short d = day(timec);
// The algorithm for calculating the day's number is from here: https://forum.arduino.cc/index.php?topic=44476.0
int days[]={0,31,59,90,120,151,181,212,243,273,304,334}; // Number of days at the beginning of the month in a not leap year.
String outputstr;
display.setColonOn(0);
if (viewMode == 2) {
if (m == 1 || m == 2) {
daynumber = days[(m - 1)] + d; // for any type of year, it calculate the number of days for January or February
dday = daynumber;
dseason = 0;
} // Now, try to calculate for the other months
else if ((y % 4 == 0 && y % 100 != 0) || y % 400 == 0) { //those are the conditions to have a leap year
daynumber = days[(m - 1)] + d + 1; // if leap year, calculate in the same way but increasing one day
dday = (daynumber % 73) - 1;
dseason = (daynumber - 1) / 73;
}
else { // if not a leap year, calculate in the normal way, such as January or February
daynumber = days[(m - 1)] + d;
dday = daynumber % 73;
dseason = daynumber / 73;
}
if ( m == 2 && d == 29 ) outputstr = " tib";
else {
if (dseason == 0) outputstr = "ch";
else if (dseason == 1) outputstr = "di";
else if (dseason == 2) outputstr = "co";
else if (dseason == 3) outputstr = "bu";
else outputstr = "af";
outputstr += (dday / 10);
outputstr += (dday % 10);
}
display.print(outputstr);
} else {
// Calculating and displaying discordian weekday:
byte dweekday;
daynumber = days[(m - 1)] + d;
if (daynumber < 6) dweekday = daynumber;
else dweekday = daynumber % 5;
if ( m == 2 && d == 29 ) outputstr = " tib";
else {
if (dweekday == 1) outputstr = "swee";
else if (dweekday == 2) outputstr = "boom";
else if (dweekday == 3) outputstr = "pung";
else if (dweekday == 4) outputstr = "pric";
else outputstr = "sett";
}
display.print(outputstr);
}
}
void dyold() {
// Calculating and displaying discordian yold:
uint32_t timec;
timec = now() + timezoneOffset;
int yold;
yold = year(timec) + 1166;
display.setColonOn(0);
display.print(yold);
}
void longPress() {
// Long button press function
display.setColonOn(0);
display.print("HAIL_EriS");
viewMode = 0;
}

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