Contrôle d'un afficheur 4x7 segments avec une carte NodeMCU ESP8266 et un Shift Register SN74HC595N

Grâce au Shift Register 74HC595, il est possible de connecter les 12 pins d'un afficheur 4x7segments sur une carte NodeMCU, et ce en relayant les 7 segments et le point décimal (a,b,c,d,e,f,g,.), c'est à dire les 8 Outputs à travers le 74HC595 de type SIPO et générant 3 Inputs (data, latch, clock).
Code :
#include "Timer.h"
Timer t;
long number = 0;
int digit_1 = 0;
int digit_2 = 0;
int digit_3 = 0;
int digit_4 = 0;
int timer_event = 0;
int cathode_1 = 5;
int cathode_2 = 4;
int cathode_3 = 0;
int cathode_4 = 2;
int latchPin = 15;
int clockPin = 14;
int dataPin = 13;
int count = 3, b;
int digits[4] ;
int cathodePins[4] = {5, 4, 0, 2};
byte numbers[10] {B00000011, B10011111,B00100101,B00001101,B10011001,B01001001,B01000001,B00011111,B00000001,B00001001};
void setup() {
Serial.begin(9600);
pinMode(cathode_1, OUTPUT);
pinMode(cathode_2, OUTPUT);
pinMode(cathode_3, OUTPUT);
pinMode(cathode_4, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(latchPin, OUTPUT);
pinMode(dataPin, OUTPUT);
digitalWrite(cathode_1, HIGH);
digitalWrite(cathode_2, HIGH);
digitalWrite(cathode_3, HIGH);
digitalWrite(cathode_4, HIGH);
Serial.println("Please enter a number between 0 and 9999");
}
void loop() {
t.update();
if (Serial.available()) {
t.stop(timer_event);
cathode_high();
String s = Serial.readString();
number = (long)s.toInt();
if (number sup 9999) { //remplacer sup par le symbole supérieur
Serial.println("Invalid number!
Please enter a number between 0 and 9999");
} else {
break_number(number);
timer_event = t.every(1, display_number);
}
}
}
void break_number(long num) {
digit_1 = num / 1000;
digits[0] = digit_1;
int dig_1_remove = num - (digit_1 * 1000);
digit_2 = dig_1_remove / 100;
digits[1] = digit_2;
int dig_2_remove = dig_1_remove - (digit_2 * 100);
digit_3 = dig_2_remove / 10;
digits[2] = digit_3;
digit_4 = dig_2_remove - (digit_3 * 10);
digits[3] = digit_4;
}
void display_number() {
cathode_high();
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, LSBFIRST, numbers[digits[count]]);
for(b=0;b inf 4;b++) if(count!=b) digitalWrite(cathodePins[b], LOW); //repmlacer inf par le symbole inférieur
digitalWrite(latchPin, HIGH);
count--;
if (count == -1) {
count = 3;
}
}
void cathode_high() {
digitalWrite(cathode_1, HIGH);
digitalWrite(cathode_2, HIGH);
digitalWrite(cathode_3, HIGH);
digitalWrite(cathode_4, HIGH);
}
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