Pls help us in modifying the code we just copied at http://www.circuitstoday.com/arduino-and-7-segment-display . This code is to display four digit. And our problem is We want this code to display an 8 digit cathode seven segment display. What must be added in the codes .here is the full code that we copied. Credits to the owner. Thank you
#include "Timer.h" //include timer library
Timer t; // craete a timer object
long number = 0; //declear the variables
int first_digit = 0;
int second_digit = 0;
int third_digit = 0;
int fourth_digit = 0;
int timer_event = 0;
int CA_1 = 12;
int CA_2 = 11;
int CA_3 = 10;
int CA_4 = 9;
int clk = 6;
int latch = 5;
int data = 4;
int count = 0;
int digits[4] ;
int CAS[4] = {12, 11, 10, 9};
byte numbers[10] {B11111100, B01100000, B11011010, B11110010, B01100110, B10110110, B10111110, B11100000, B11111110, B11110110};
//byte combinations for each number 0-9
void setup() {
Serial.begin(9600); //serial start and pin config
pinMode(CA_1, OUTPUT);
pinMode(CA_2, OUTPUT);
pinMode(CA_3, OUTPUT);
pinMode(CA_4, OUTPUT);
pinMode(clk, OUTPUT);
pinMode(latch, OUTPUT);
pinMode(data, OUTPUT);
digitalWrite(CA_1, HIGH);
digitalWrite(CA_2, HIGH);
digitalWrite(CA_3, HIGH);
digitalWrite(CA_4, HIGH);
Serial.println("please Enter a number from 0 to 9999");
}
void loop() {
t.update(); //timer update
if (Serial.available()) { // read from serial
t.stop(timer_event); //stop timer if anythign to read
cathode_high(); // blank the screen
String s = Serial.readString(); //read the serail value
number = (long)s.toInt(); //convert it to int
if (number > 9999) { //check the number is 0-9999
Serial.println("Please Enter Number Between 0 - 9999");
} else {
break_number(number);
timer_event = t.every(1, display_number); // start timer again
}
}
}
void break_number(long num) { // seperate the input number into 4 single digits
first_digit = num / 1000;
digits[0] = first_digit;
int first_left = num - (first_digit * 1000);
second_digit = first_left / 100;
digits[1] = second_digit;
int second_left = first_left - (second_digit * 100);
third_digit = second_left / 10;
digits[2] = third_digit;
fourth_digit = second_left - (third_digit * 10);
digits[3] = fourth_digit;
}
void display_number() { //scanning
cathode_high(); //black screen
digitalWrite(latch, LOW); //put the shift register to read
shiftOut(data, clk, LSBFIRST, numbers[digits[count]]); //send the data
digitalWrite(CAS[count], LOW); //turn on the relevent digit
digitalWrite(latch, HIGH); //put the shift register to write mode
count++; //count up the digit
if (count == 4) { // keep the count between 0-3
count = 0;
}
}
void cathode_high() { //turn off all 4 digits
digitalWrite(CA_1, HIGH);
digitalWrite(CA_2, HIGH);
digitalWrite(CA_3, HIGH);
digitalWrite(CA_4, HIGH);
}