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@ladyada @tdicola @PaintYourDragon
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/***************************************************
This is a library for our I2C LED Backpacks
Designed specifically to work with the Adafruit LED 7-Segment backpacks
----> http://www.adafruit.com/products/881
----> http://www.adafruit.com/products/880
----> http://www.adafruit.com/products/879
----> http://www.adafruit.com/products/878
These displays use I2C to communicate, 2 pins are required to
interface. There are multiple selectable I2C addresses. For backpacks
with 2 Address Select pins: 0x70, 0x71, 0x72 or 0x73. For backpacks
with 3 Address Select pins: 0x70 thru 0x77
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, all text above must be included in any redistribution
****************************************************/
#include <Wire.h> // Enable this line if using Arduino Uno, Mega, etc.
#include <Adafruit_GFX.h>
#include "Adafruit_LEDBackpack.h"
Adafruit_7segment matrix = Adafruit_7segment();
void setup() {
#ifndef __AVR_ATtiny85__
Serial.begin(9600);
Serial.println("7 Segment Backpack Test");
#endif
matrix.begin(0x70);
}
void loop() {
// try to print a number thats too long
matrix.print(10000, DEC);
matrix.writeDisplay();
delay(500);
// print a hex number
matrix.print(0xBEEF, HEX);
matrix.writeDisplay();
delay(500);
// print a floating point
matrix.print(12.34);
matrix.writeDisplay();
delay(500);
// print with print/println
for (uint16_t counter = 0; counter < 9999; counter++) {
matrix.println(counter);
matrix.writeDisplay();
delay(10);
}
// method #2 - draw each digit
uint16_t blinkcounter = 0;
boolean drawDots = false;
for (uint16_t counter = 0; counter < 9999; counter ++) {
matrix.writeDigitNum(0, (counter / 1000), drawDots);
matrix.writeDigitNum(1, (counter / 100) % 10, drawDots);
matrix.drawColon(drawDots);
matrix.writeDigitNum(3, (counter / 10) % 10, drawDots);
matrix.writeDigitNum(4, counter % 10, drawDots);
blinkcounter+=50;
if (blinkcounter < 500) {
drawDots = false;
} else if (blinkcounter < 1000) {
drawDots = true;
} else {
blinkcounter = 0;
}
matrix.writeDisplay();
delay(10);
}
}
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