Right syntax for Parola Library

Other Hardware LEDs and Multiplexing
1

Hello,

I'm trying to make a simple counter who increment every 4 seconds.

the code

// Program to demonstrate the MD_Parola library
//
// NOTE: MD_MAX72xx library must be installed and configured for the LED
// matrix type being used. Refer documentation included in the MD_MAX72xx
// library or see this link:
// https://majicdesigns.github.io/MD_MAX72XX/page_hardware.html
//

#include<CountUpDownTimer.h>

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define MAX_DEVICES 8
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

CountUpDownTimer T(UP, HIGH); // Default precision is HIGH, but you can change it to also be LOW
CountUpDownTimer T2(UP, HIGH); // Default precision is HIGH, but you can change it to also be LOW


char compteur[7];
unsigned long x = 0;
unsigned long flag = 1;

// Hardware SPI connection
MD_Parola P = MD_Parola(CS_PIN, MAX_DEVICES);
// Arbitrary output pins
// MD_Parola P = MD_Parola(DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

void setup(void)
{

  Serial.begin(9600);
  T.StartTimer();
  T2.StartTimer();

  P.begin();
  sprintf (compteur, "%d", x);
  P.displayText(compteur, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
}

void loop(void)
{
   T.Timer(); // run the timer
   sprintf (compteur, "%d", x);
   P.displayAnimate();
   Serial.println (compteur);
}

work show me a 0.

But when I add my counter

void loop(void)
{
  T.Timer(); // run the timer

  if ( (T.ShowSeconds() - flag) == 4 )
  {
    flag = T.ShowSeconds();
    x  = x + 1 ;
      sprintf (compteur, "%d", x);
  };
  P.displayAnimate();
  Serial.println (compteur);
}

the counter doesn't work but the serial show me that x take the good value.

Using class P.displayAnimate is to pass the value at P.displayText ?

What else do I need to do ?

2

Ok I needed to add P.displayReset

// Program to demonstrate the MD_Parola library
//
// NOTE: MD_MAX72xx library must be installed and configured for the LED
// matrix type being used. Refer documentation included in the MD_MAX72xx
// library or see this link:
// https://majicdesigns.github.io/MD_MAX72XX/page_hardware.html
//

#include<CountUpDownTimer.h>

#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>

// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define MAX_DEVICES 8
#define CLK_PIN   13
#define DATA_PIN  11
#define CS_PIN    10

CountUpDownTimer T(UP, HIGH); // Default precision is HIGH, but you can change it to also be LOW
CountUpDownTimer T2(UP, HIGH); // Default precision is HIGH, but you can change it to also be LOW


char compteur[7];
unsigned long x = 0;
unsigned long flag = 1;

// Hardware SPI connection
MD_Parola P = MD_Parola(CS_PIN, MAX_DEVICES);
// Arbitrary output pins
// MD_Parola P = MD_Parola(DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);

void setup(void)
{

  Serial.begin(9600);
  T.StartTimer();
  T2.StartTimer();

  P.begin();
  sprintf (compteur, "%ld", x);
  P.displayText(compteur, PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
}

void loop(void)
{
  T.Timer(); // run the timer
  P.displayAnimate();
  if ( (T.ShowSeconds() - flag) == 4 )
  {
    flag = T.ShowSeconds();
    x  = x + 1 ;

  };
  sprintf (compteur, "%d", x);
  P.displayAnimate();
  Serial.println (compteur);
  P.displayReset();
}

void tempo3()
{
  if ( (T.ShowSeconds() - flag) == 4 )
  {
    sprintf (compteur, "%d", x);
    flag = T.ShowSeconds();
    x  = x++ ;

  }

}

But now, the counter stop at 14. I will take a look

3

I found my own problem, it was newbie stuff.

The value return by ShowSeconds is 58, 59 and the 00 !!!