hacks/arduino/quadalphanum/quadalphanum.ino

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Arduino
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2022-01-09 13:40:55 +00:00
// Demo the quad alphanumeric display LED backpack kit
// scrolls through every character, then scrolls Serial
// input onto the display
#include <Wire.h>
#include <Adafruit_GFX.h>
#include "Adafruit_LEDBackpack.h"
Adafruit_AlphaNum4 one = Adafruit_AlphaNum4();
Adafruit_AlphaNum4 two = Adafruit_AlphaNum4();
unsigned long ticks;
void setup() {
Serial.begin(9600);
one.begin(0x71); // pass in the address
two.begin(0x70);
one.writeDigitRaw(3, 0x0);
one.writeDigitRaw(0, 0xFFFF);
one.writeDisplay();
delay(200);
one.writeDigitRaw(0, 0x0);
one.writeDigitRaw(1, 0xFFFF);
one.writeDisplay();
delay(200);
one.writeDigitRaw(1, 0x0);
one.writeDigitRaw(2, 0xFFFF);
one.writeDisplay();
delay(200);
one.writeDigitRaw(2, 0x0);
one.writeDigitRaw(3, 0xFFFF);
one.writeDisplay();
delay(200);
one.clear();
one.writeDisplay();
two.clear();
two.writeDisplay();
one.writeDigitAscii(0, '1');
one.writeDigitAscii(1, '2');
one.writeDigitAscii(2, '0');
one.writeDigitAscii(3, '0');
two.writeDigitAscii(0, '0');
two.writeDigitAscii(1, '1');
two.writeDigitAscii(2, '2');
two.writeDigitAscii(3, '3');
one.writeDisplay();
two.writeDisplay();
delay(300);
Serial.println("Start typing to display!");
}
char displaybuffer[4] = {' ', ' ', ' ', ' '};
void loop() {
ticks = millis();
sprintf(displaybuffer, "%02d", ticks/1000);
sprintf(displaybuffer+2, "%02d", ticks-(ticks/1000)*1000);
Serial.println(displaybuffer);
// set every digit to the buffer
two.writeDigitAscii(0, displaybuffer[0]);
two.writeDigitAscii(1, displaybuffer[1]);
two.writeDigitAscii(2, displaybuffer[2]);
two.writeDigitAscii(3, displaybuffer[3]);
// write it out!
two.writeDisplay();
delay(10);
}