Skip to content

Instantly share code, notes, and snippets.

@Electronza
Last active December 10, 2019 10:55
Embed
What would you like to do?
Arduino binary clock - V1
/*******************************************************************
____ __ ____ ___ ____ ____ __ __ _ ____ __
( __)( ) ( __)/ __)(_ _)( _ \ / \ ( ( \(__ ) / _\
) _) / (_/\ ) _)( (__ )( ) /( O )/ / / _/ / \
(____)\____/(____)\___) (__) (__\_) \__/ \_)__)(____)\_/\_/
Project name: Arduino LED matrix binary clock
Project page: https://electronza.com/arduino-led-matrix-binary-clock
Description: This version shows each digit of the hours, minutes and seconds
as a binary number
********************************************************************/
// Thus, 12:39:45 will be
// Hours
// 00000001
// 00000010
// Minutes
// 00000011
// 00001001
// Seconds
// 00000100
// 00000101
// Date and time functions using a DS1307 RTC connected via I2C and Wire lib
#include <Wire.h>
#include "RTClib.h"
// Library for 8x8B click
#include "LedControl.h"
// The 8x8 click board is placed in mikroBUS socket #1
LedControl lc=LedControl(11,13,10,1);
// RTC settings
RTC_DS1307 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
// Clock variables
// Look-up table to show binary values on the LED matrix
int myBinaryDisp[] = {B00000000, B10000000, B01000000, B11000000, B00100000,
B10100000, B01100000, B11100000, B00010000, B10010000};
bool is_second = false;
void setup() {
// RTC Initialization
if (! rtc.begin()) {
while (1);
}
if (! rtc.isrunning()) {
// Serial.println("RTC is NOT running!");
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
/*
The MAX72XX is in power-saving mode on startup,
we have to do a wakeup call
*/
lc.shutdown(0,false);
/* Set the brightness to a medium values */
lc.setIntensity(0,4);
/* and clear the display */
lc.clearDisplay(0);
// Set up interrupts
interrupts();
// If the RTC is placed in mikroBUS socket #2 the interrupt pin is D3
attachInterrupt(digitalPinToInterrupt(3), onesecond, RISING);
// CONFIGURE RTC for 1Hz square wave output
rtc.writeSqwPinMode(SquareWave1HZ);
}
void loop() {
if (is_second == true){
update_display();
is_second = false;
}
}
// This function updates the LED matrix
void update_display (void){
// Read the RTC
DateTime now = rtc.now();
// lc.clearDisplay(0);// clear screen
// update hours
// upper digit
int hh = now.hour() / 10;
lc.setColumn(0,0,myBinaryDisp[hh]);
//lower digit
int hl = now.hour() % 10;
lc.setColumn(0,1,myBinaryDisp[hl]);
// update minutes
// upper digit
int mh = now.minute() / 10;
lc.setColumn(0,3,myBinaryDisp[mh]);
//lower digit
int ml = now.minute() % 10;
lc.setColumn(0,4,myBinaryDisp[ml]);
// update seconds
// upper digit
int sh = now.second() / 10;
lc.setColumn(0,6,myBinaryDisp[sh]);
//lower digit
int sl = now.second() % 10;
lc.setColumn(0,7,myBinaryDisp[sl]);
}
// ISR routine
void onesecond() {
is_second = true;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment