DS1302 & 4 digit 7 segment display

Projects Programming
1

Hello
I have already found this code:

// CONNECTIONS:
// DS1302 CLK/SCLK --> 5
// DS1302 DAT/IO --> 4
// DS1302 RST/CE --> 2
// DS1302 VCC --> 3.3v - 5v
// DS1302 GND --> GND

int pinA = 0;
int pinB = 1;
int pinC = 3;
int pinD = 6;
int pinE = 7;
int pinF = 8;
int pinG = 9;
int D1 = 13;
int D2 = 12;
int D3 = 11;
int D4 = 10;

#include <ThreeWire.h>
#include <RtcDS1302.h>

ThreeWire myWire(4,5,2); // IO, SCLK, CE
RtcDS1302 Rtc(myWire);

void setup ()
{
Serial.begin(57600);

Serial.print("compiled: ");
Serial.print(DATE);
Serial.println(TIME);

Rtc.Begin();

RtcDateTime compiled = RtcDateTime(DATE, TIME);
printDateTime(compiled);
Serial.println();

if (!Rtc.IsDateTimeValid())
{
// Common Causes:
// 1) first time you ran and the device wasn't running yet
// 2) the battery on the device is low or even missing

Serial.println("RTC lost confidence in the DateTime!");
Rtc.SetDateTime(compiled);
}

if (Rtc.GetIsWriteProtected())
{
Serial.println("RTC was write protected, enabling writing now");
Rtc.SetIsWriteProtected(false);
}

if (!Rtc.GetIsRunning())
{
Serial.println("RTC was not actively running, starting now");
Rtc.SetIsRunning(true);
}

RtcDateTime now = Rtc.GetDateTime();
if (now < compiled)
{
Serial.println("RTC is older than compile time! (Updating DateTime)");
Rtc.SetDateTime(compiled);
}
else if (now > compiled)
{
Serial.println("RTC is newer than compile time. (this is expected)");
}
else if (now == compiled)
{
Serial.println("RTC is the same as compile time! (not expected but all is fine)");
}
pinMode(pinA,OUTPUT);
pinMode(pinB,OUTPUT);
pinMode(pinC,OUTPUT);
pinMode(pinD,OUTPUT);
pinMode(pinE,OUTPUT);
pinMode(pinF,OUTPUT);
pinMode(pinG,OUTPUT);
pinMode(D1, OUTPUT);
pinMode(D2, OUTPUT);
pinMode(D3, OUTPUT);
pinMode(D4, OUTPUT);
}

void loop ()
{
RtcDateTime now = Rtc.GetDateTime();

printDateTime(now);
Serial.println();

if (!now.IsValid())
{
// Common Causes:
// 1) the battery on the device is low or even missing and the power line was disconnected
Serial.println("RTC lost confidence in the DateTime!");
}

delay(10000); // ten seconds

}
#define countof(a) (sizeof(a) / sizeof(a[0]))

void printDateTime(const RtcDateTime& dt)
{
char datestring[20];

snprintf_P(datestring,
countof(datestring),
PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
dt.Month(),
dt.Day(),
dt.Year(),
dt.Hour(),
dt.Minute(),
dt.Second() );
Serial.print(datestring);
}

Does anyone know how I can show the clock on my 4 digit 7 segment display?

2

figure out how to display "1234" on your 4 digit display first

3

Please provide a link to the display you're using, or post an image of it.