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--- informatica:arduino:matrix_led [2022/10/24 23:28] – jose
+++ informatica:arduino:matrix_led [2024/11/13 20:32] (current) – jose
@@ Line 1: / Line 1: @@
-====== Panel Matrix led ======
+====== Matrix panel led MAX7219 ======
-Hay varias bibliotecas (que no librerías)
-====== 1. MD_MAX72XX y MD_Parola ======
+^ ESP32 ^ MAX7219 ^ Descripción ^
-https://microcontrollerslab.com/led-dot-matrix-display-esp32-max7219/
+| 5V | VCC | Alimentación |
+| GND | GND | Tierra |
+| GPIO 23 | DIN | Datos |
+| GPIO 18 | CLK | Reloj |
+| GPIO 5 | CS | Chip Select (CS/LOAD) |
-Bibliotecas: MD_MAX72XX by MajicDesigns and MD_Parola de MajicDesigns
-{{:informatica:arduino:ejemplo_1.png|}}
-^PANEL^ESP32^
-|VCC|Vin|
-|GND|GND|
-|DIN|GPIO23|
-|CS|GPIO5|
-|CLK|GPIO18|
-Texti de plano a pins
-<code>
-#include <MD_Parola.h>
-#include <MD_MAX72xx.h>
-#include <SPI.h>
-// Uncomment according to your hardware type
-#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
-//#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW
-// Defining size, and output pins
-#define MAX_DEVICES 4
-#define DATA_PIN 23
-#define CS_PIN 5
-#define CLK_PIN 18
-MD_Parola Display = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
-void setup() {
-  Display.begin();
-  Display.setIntensity(0);
-  Display.displayClear();
-}
-void loop() {
-  Display.setTextAlignment(PA_LEFT);
-  Display.print("ESP32");
-  delay(2000);
-  Display.setTextAlignment(PA_CENTER);
-  Display.print("ESP32");
-  delay(2000);
-  Display.setTextAlignment(PA_RIGHT);
-  Display.print("ESP32");
-  delay(2000);
-  Display.setTextAlignment(PA_CENTER);
-  Display.setInvert(true);
-  Display.print("ESP32");
-  delay(2000);
-  Display.setInvert(false);
-  delay(2000);
-}
-</code>
-====== 2. Max72xxPanel y SPI ======
-Con esta biblioteca (que no librería) podemos definir en que posición sale cada carácter. Por ejemplo, si hacemos una secuencia de números, el 1 es mas estrecho que el 2
-  matrix.drawChar(x,y,char,color,bg,size);
-Por ejemplo:
-  matrix.drawChar(0, 1, cadena[2], HIGH, LOW, 1);
-<code>
-#include <SPI.h>
-#include <Adafruit_GFX.h>
-#include <Max72xxPanel.h>
-const int pinCS = 5;
-const int pinClk = 18;
-const int pinDin = 23;
-String cadena = "ESP32";
-const int numberOfHorizontalDisplays = 4;
-//const int numberOfHorizontalDisplays = 1; // retirar comentario para una sola matriz
-const int numberOfVerticalDisplays = 1;
-Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);
-void setup() {
-  matrix.setIntensity(7); // Use a value between 0 and 15 for brightness
-   //
-  matrix.setPosition(0, 0, 0); // The first display is at <0, 0>
-  matrix.setPosition(1, 1, 0); // The second display is at <1, 0>
-  matrix.setPosition(2, 2, 0); // The third display is at <2, 0>
-  matrix.setPosition(3, 3, 0); // And the last display is at <3, 0>
-  matrix.setRotation(0, 1);    // Display is position upside down
-  matrix.setRotation(1, 1);    // Display is position upside down
-  matrix.setRotation(2, 1);    // Display is position upside down
-  matrix.setRotation(3, 1);    // Display is position upside down
-}
-void loop() {
-  matrix.drawChar(0, 1, cadena[3], HIGH, LOW, 1);
-  matrix.write();
-}
-</code>
-Para escribir una palabra: