NEOPIXEL 8x8 RGB cannot show scrolling text.
I am very new with Arduino and Neopxiel. I saw many Youtuber can create scrolling text with NEOPIXEL 8x8 RGB.
I know that we have to inform the Arduino how leds in the panel were arragned.
After I used code for test led strip the dot on the panel went like this pattern.
// 0 > 1 > 2 > 3 > 4
// |
// |
// 9 < 8 < 7 < 6 < 5
// l
l
// 10 > 11 > 12 > 13 > 14
// |
// |
// 19 < 18 < 17 < 16 < 15
I input pattern into the code like this
NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG,
This is the code I used.
Source
// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls ‘Howdy’ across the matrix in a portrait (vertical) orientation.
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#ifndef PSTR
#define PSTR // Make Arduino Due happy
#endif
#define PIN 6 // aqui definimos el pin que vamos a usar para cominicarnos con la matriz
// MATRIX DECLARATION:
// Parameter 1 = width of NeoPixel matrix
// Parameter 2 = height of matrix
// Parameter 3 = pin number (most are valid)
// Parameter 4 = matrix layout flags, add together as needed:
// NEO_MATRIX_TOP, NEO_MATRIX_BOTTOM, NEO_MATRIX_LEFT, NEO_MATRIX_RIGHT:
// Position of the FIRST LED in the matrix; pick two, e.g.
// NEO_MATRIX_TOP + NEO_MATRIX_LEFT for the top-left corner.
// NEO_MATRIX_ROWS, NEO_MATRIX_COLUMNS: LEDs are arranged in horizontal
// rows or in vertical columns, respectively; pick one or the other.
// NEO_MATRIX_PROGRESSIVE, NEO_MATRIX_ZIGZAG: all rows/columns proceed
// in the same order, or alternate lines reverse direction; pick one.
// See example below for these values in action.
// Parameter 5 = 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)
// Example for NeoPixel Shield. In this application we’d like to use it
// as a 5x8 tall matrix, with the USB port positioned at the top of the
// Arduino. When held that way, the first pixel is at the top right, and
// lines are arranged in columns, progressive order. The shield uses
// 800 KHz (v2) pixels that expect GRB color data.
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(8, 8, PIN,
NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
NEO_MATRIX_ROWS + NEO_MATRIX_ZIGZAG,
NEO_GRB + NEO_KHZ800); //Aqui definimos el tipo de matriz en este caso 8x8
const uint16_t colors[] = {
matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(0, 0, 255) }; // colores que se van a mostrar en la matriz
void setup() {
matrix.begin();
matrix.setTextWrap(false);
matrix.setBrightness(40); //brillo de los leds
matrix.setTextColor(colors[0]);
}
int x = matrix.width();
int pass = 0;
void loop() {
matrix.fillScreen(0);
matrix.setCursor(x, 0);
matrix.print(F(“TEXOLAB”)); // modificamos aqui para escribir el texto que queramos
if(–x < -36) {
x = matrix.width();
if(++pass >= 3) pass = 0;
matrix.setTextColor(colors[pass]);
}
matrix.show();
delay(100);
}
The problem is that when the panel is turned on, there are just dots without pattern moving in the same direction on the panel. Unreadable
I’m not sure what is my mistake.
Hope you guys can guide me the way to fix this
Thanks