I recently got the Adafruit 8x8 red 0,8"matrix. I'm using it with the Arduino Nano. Last week I got it to work with the example code. But this week the matrix won't do anything, with that same code. I added some println's to test where it goes wrong. And it seems to stop working after the code says
.matrix.begin(0x70);
You can see that in the serial monitor test1 does print, but test2 doesn't... If I comment out matrix.begin(0x70); then test3 prints as well. just one time.
Code: Select all
#include <Adafruit_LEDBackpack.h>
#include <gfxfont.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SPITFT.h>
#include <Adafruit_SPITFT_Macros.h>
#include <Wire.h>
/***************************************************
This is a library for our I2C LED Backpacks
Designed specifically to work with the Adafruit LED Matrix backpacks
----> http://www.adafruit.com/products/872
----> http://www.adafruit.com/products/871
----> http://www.adafruit.com/products/870
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
****************************************************/
Adafruit_8x8matrix matrix = Adafruit_8x8matrix();
void setup() {
Serial.begin(9600);
Serial.println("8x8 LED Matrix Test");
Serial.println("test1");
matrix.begin(0x70); // pass in the address
Serial.println("test2");
}
static const uint8_t PROGMEM
smile_bmp[] =
{ B00111100,
B01000010,
B10100101,
B10000001,
B10100101,
B10011001,
B01000010,
B00111100 },
neutral_bmp[] =
{ B00111100,
B01000010,
B10100101,
B10000001,
B10111101,
B10000001,
B01000010,
B00111100 },
frown_bmp[] =
{ B00111100,
B01000010,
B10100101,
B10000001,
B10011001,
B10100101,
B01000010,
B00111100 };
void loop() {
Serial.println("test3");
matrix.clear();
matrix.drawBitmap(0, 0, smile_bmp, 8, 8, LED_ON);
matrix.writeDisplay();
delay(500);
matrix.clear();
matrix.drawBitmap(0, 0, neutral_bmp, 8, 8, LED_ON);
matrix.writeDisplay();
delay(500);
matrix.clear();
matrix.drawBitmap(0, 0, frown_bmp, 8, 8, LED_ON);
matrix.writeDisplay();
delay(500);
matrix.clear(); // clear display
matrix.drawPixel(0, 0, LED_ON);
matrix.writeDisplay(); // write the changes we just made to the display
delay(500);
matrix.clear();
matrix.drawLine(0,0, 7,7, LED_ON);
matrix.writeDisplay(); // write the changes we just made to the display
delay(500);
matrix.clear();
matrix.drawRect(0,0, 8,8, LED_ON);
matrix.fillRect(2,2, 4,4, LED_ON);
matrix.writeDisplay(); // write the changes we just made to the display
delay(500);
matrix.clear();
matrix.drawCircle(3,3, 3, LED_ON);
matrix.writeDisplay(); // write the changes we just made to the display
delay(500);
matrix.setTextSize(1);
matrix.setTextWrap(false); // we dont want text to wrap so it scrolls nicely
matrix.setTextColor(LED_ON);
for (int8_t x=0; x>=-36; x--) {
matrix.clear();
matrix.setCursor(x,0);
matrix.print("Hello");
matrix.writeDisplay();
delay(100);
}
matrix.setRotation(3);
for (int8_t x=7; x>=-36; x--) {
matrix.clear();
matrix.setCursor(x,0);
matrix.print("World");
matrix.writeDisplay();
delay(100);
}
matrix.setRotation(0);
}
See the image..
I hope you can help me with this!
Thanks!