Get more code examples on our github: Adafruit-LED-Backpack-Library
#include <avr/power.h>
#include <TinyWireM.h>
#include "Adafruit_LEDBackpack.h"
#include "Adafruit_GFX.h"
Adafruit_AlphaNum4 alpha4 = Adafruit_AlphaNum4();
char *message = "**3D** 4 LIFE*** ";
void setup() {
if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
alpha4.begin(0x70); // pass in the address
alpha4.writeDisplay(); // clear display
}
void loop() {
// just display 4 letters
alpha4.writeDigitAscii(0, 'H');
alpha4.writeDigitAscii(1, 'A');
alpha4.writeDigitAscii(2, 'C');
alpha4.writeDigitAscii(3, 'K');
alpha4.writeDisplay();
delay(1000); // hold for 1 second
// scroll the message above!
for (uint8_t i=0; i<strlen(message)-4; i++) {
alpha4.writeDigitAscii(0, message[i]);
alpha4.writeDigitAscii(1, message[i+1]);
alpha4.writeDigitAscii(2, message[i+2]);
alpha4.writeDigitAscii(3, message[i+3]);
alpha4.writeDisplay();
delay(500);
}
}
