I have a 16x16 WS2812 led matrix connected to my arduino nano. I'm trying to print multiple words of text on their own lines, and in different colors. For instance, it will print "Hi" in green, new line, then print "Hi" in blue. But my loop seems to be chaining each word endlessly, going off the matrix eventually. It ONLY started doing this when I began using custom fonts because the default font was just too massive for what I want. Similar issue to this post but i'm using a different type of display.
I know in this image it's hard to tell with the pixel font but it says "Hi" in all caps. As you can see it repeats off the matrix. Also notable that after about 60 seconds or so it starts to overlap itself very badly.
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <Fonts/Picopixel.h>
// Which pin on the Arduino is connected to the NeoPixels?
// On a Trinket or Gemma we suggest changing this to 1:
#define LED_PIN 6
#ifndef PSTR
#define PSTR // Make Arduino Due happy
#endif
// How many NeoPixels are attached to the Arduino?
#define LED_COUNT 256
// Color definitions
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(16, 16, LED_PIN,
NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +
NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG,
NEO_GRB + NEO_KHZ800);
// Declare our NeoPixel strip object:
//Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_RGB + NEO_KHZ800);
// Argument 1 = Number of pixels in NeoPixel strip
// Argument 2 = Arduino pin number (most are valid)
// Argument 3 = Pixel type flags, add together as needed:
// NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
// NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
// NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)
// NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
// NEO_RGBW Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
void setup() {
// put your setup code here, to run once:
void drawPixel(uint16_t x, uint16_t y, uint16_t color);
void drawFastVLine(uint16_t x0, uint16_t y0, uint16_t length, uint16_t color);
void drawFastHLine(uint8_t x0, uint8_t y0, uint8_t length, uint16_t color);
void drawRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t color);
void fillRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t color);
void drawCircle(uint16_t x0, uint16_t y0, uint16_t r, uint16_t color);
void fillCircle(uint16_t x0, uint16_t y0, uint16_t r, uint16_t color);
void drawRoundRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t radius, uint16_t color);
void fillRoundRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t radius, uint16_t color);
void drawTriangle(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
void fillTriangle(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color);
void drawChar(uint16_t x, uint16_t y, char c, uint16_t color, uint16_t bg, uint8_t size);
void setCursor(int16_t x0, int16_t y0);
void setTextColor(uint16_t color);
void setTextColor(uint16_t color, uint16_t backgroundcolor);
void setTextSize(uint8_t size);
void setTextWrap(boolean w);
matrix.begin();
matrix.setBrightness(5);
matrix.setTextWrap(false);
matrix.setFont(&Picopixel);
matrix.setCursor(0, 4);
matrix.setTextSize(1);
matrix.show();
}
void loop() {
matrix.setTextColor(GREEN);
matrix.print("HI");
matrix.show();
matrix.print('\n');
matrix.setTextColor(BLUE);
matrix.print("HI");
matrix.show();
}