Help about Dot (LED) Matrix Clock

Projects General Guidance
1

Hello everyone. I am trying to make clock on dot matrix. Just wanna see the time no animations or somethings.

But i can't see anything on led matrix. Here are my project on Proteus and my code. Could you help ? (I just want to see just year for the beginning))

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include <Wire.h>
#include <RTClib.h>
RTC_DS1307 rtc;
DateTime now = rtc.now();


#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
#define MAX_DEVICES 4
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);

void setup(void)
{
   #ifdef AVR
   Wire.begin();
   #else
   Wire1.begin();
   #endif
   rtc.begin();
   rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
   byte sene = now.year();
  P.begin();
  P.displayText(sene, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
}

void loop(void)
{
  P.displayAnimate();
  DateTime now = rtc.now();
}

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2

Are you running the code on a real Arduino or just in the sim?

3

Just sim. But in this line if i write char i mean "hello" , "uno" like these it is working.

p.displayText(sene, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT); not working

p.displayText("hello", PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT) is working

4

How is the variable serie declared? Is it a string (null terminated character array) or a pointer to a string?

Post the whole sketch. Snippets leave out so much information the we need to know.