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