Common anode 7 segments display with MAX7219

2020-12-30 01:50:00

Code

#include "LedControl.h"

/*
 pin 12 is connected to the DataIn
 pin 11 is connected to the CLK
 pin 10 is connected to LOAD
 */
LedControl lc=LedControl(12,11,10,3);

void print(byte d,byte n) {
  lc.setColumn(0,d,pgm_read_byte_near(charTable + n));
}

void setup() {
  lc.shutdown(0,false);
  lc.setIntensity(0,9); // 0 to 15
  lc.clearDisplay(0);
}

int first;
int second;
int third;

void loop() {

  for(int base=0;base<1000;base++) {

    first = base / 100 % 10;
    second =  base / 10 % 10;
    fourth = base % 10;

    print(1, first);
    print(2, second);
    print(3, third);

    delay(10);
  }
}