Matriz de leds de 8×8
En el tutorial de hoy vamos a programar una matriz de Leds de 8×8.
Para ello el material a utilizar será el siguiente:
– Arduino UNO
– Matriz de Leds de 8×8
Como comenta el programa que sigue a esta explicación las conexiones serán:
- pin DIN de la matriz con Pin 4 del Arduino.
- pin CLK de la matriz con Pin 5 del Arduino.
- pin CS/Load de la matriz con Pin 6 del Arduino.
- pin VCC de la matriz con Pin de 5V del Arduino.
- pin GND de la matriz con Pin de GND del Arduino.
El programa que debemos implementar en nuestro Arduino será el siguiente:
// Programa para matriz 8×8
// Basado en el libro Arduino Basico, de Michael McRoberts
#include <pgmspace.h>
#include <TimerOne.h>
int DataPin = 4; //Pin 4 con la clavija DIN de la matriz
int ClockPin = 5; //Pin 5 con la clavija CLK de la matriz
int LoadPin = 6; //Pin 6 con la clavija CS/Load de la matriz
//Declaramos la matriz que vamos a rellenar inicializando en binario cada led
byte buffer[8];
static byte font[][8] PROGMEM = {
{B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000},
{B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000000, B00000100},
{B00001010, B00001010, B00001010, B00000000, B00000000, B00000000, B00000000, B00000000},
{B00000000, B00001010, B00011111, B00001010, B00011111, B00001010, B00011111, B00001010},
{B00000111, B00001100, B00010100, B00001100, B00000110, B00000101, B00000110, B00011100},
{B00011001, B00011010, B00000010, B00000100, B00000100, B00001000, B00001011, B00010011},
{B00000110, B00001010, B00010010, B00010100, B00001001, B00010110, B00010110, B00001001},
{B00000100, B00000100, B00000100, B00000000, B00000000, B00000000, B00000000, B00000000},
{B00000010, B00000100, B00001000, B00001000, B00001000, B00001000, B00000100, B00000010},
{B00001000, B00000100, B00000010, B00000010, B00000010, B00000010, B00000100, B00001000},
{B00010101, B00001110, B00011111, B00001110, B00010101, B00000000, B00000000, B00000000},
{B00000000, B00000000, B00000100, B00000100, B00011111, B00000100, B00000100, B00000000},
{B00000000, B00000000, B00000000, B00000000, B00000000, B00000110, B00000100, B00001000},
{B00000000, B00000000, B00000000, B00000000, B00001110, B00000000, B00000000, B00000000},
{B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000100},
{B00000001, B00000010, B00000010, B00000100, B00000100, B00001000, B00001000, B00010000},
{B00001110, B00010001, B00010011, B00010001, B00010101, B00010001, B00011001, B00001110},
{B00000100, B00001100, B00010100, B00000100, B00000100, B00000100, B00000100, B00011111},
{B00001110, B00010001, B00010001, B00000010, B00000100, B00001000, B00010000, B00011111},
{B00001110, B00010001, B00000001, B00001110, B00000001, B00000001, B00010001, B00001110},
{B00010000, B00010000, B00010100, B00010100, B00011111, B00000100, B00000100, B00000100},
{B00011111, B00010000, B00010000, B00011110, B00000001, B00000001, B00000001, B00011110},
{B00000111, B00001000, B00010000, B00011110, B00010001, B00010001, B00010001, B00001110},
{B00011111, B00000001, B00000001, B00000001, B00000010, B00000100, B00001000, B00010000},
{B00001110, B00010001, B00010001, B00001110, B00010001, B00010001, B00010001, B00001110},
{B00001110, B00010001, B00010001, B00001111, B00000001, B00000001, B00000001, B00000001},
{B00000000, B00000100, B00000100, B00000000, B00000000, B00000100, B00000100, B00000000},
{B00000000, B00000100, B00000100, B00000000, B00000000, B00000100, B00000100, B00001000},
{B00000001, B00000010, B00000100, B00001000, B00001000, B00000100, B00000010, B00000001},
{B00000000, B00000000, B00000000, B00011110, B00000000, B00011110, B00000000, B00000000},
{B00010000, B00001000, B00000100, B00000010, B00000010, B00000100, B00001000, B00010000},
{B00001110, B00010001, B00010001, B00000010, B00000100, B00000100, B00000000, B00000100},
{B00001110, B00010001, B00010001, B00010101, B00010101, B00010001, B00010001, B00011110},
{B00001110, B00010001, B00010001, B00010001, B00011111, B00010001, B00010001, B00010001},
{B00011110, B00010001, B00010001, B00011110, B00010001, B00010001, B00010001, B00011110},
{B00000111, B00001000, B00010000, B00010000, B00010000, B00010000, B00001000, B00000111},
{B00011100, B00010010, B00010001, B00010001, B00010001, B00010001, B00010010, B00011100},
{B00011111, B00010000, B00010000, B00011110, B00010000, B00010000, B00010000, B00011111},
{B00011111, B00010000, B00010000, B00011110, B00010000, B00010000, B00010000, B00010000},
{B00001110, B00010001, B00010000, B00010000, B00010111, B00010001, B00010001, B00001110},
{B00010001, B00010001, B00010001, B00011111, B00010001, B00010001, B00010001, B00010001},
{B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00011111},
{B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00010100, B00001000},
{B00010001, B00010010, B00010100, B00011000, B00010100, B00010010, B00010001, B00010001},
{B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00011111},
{B00010001, B00011011, B00011111, B00010101, B00010001, B00010001, B00010001, B00010001},
{B00010001, B00011001, B00011001, B00010101, B00010101, B00010011, B00010011, B00010001},
{B00001110, B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001110},
{B00011110, B00010001, B00010001, B00011110, B00010000, B00010000, B00010000, B00010000},
{B00001110, B00010001, B00010001, B00010001, B00010001, B00010101, B00010011, B00001111},
{B00011110, B00010001, B00010001, B00011110, B00010100, B00010010, B00010001, B00010001},
{B00001110, B00010001, B00010000, B00001000, B00000110, B00000001, B00010001, B00001110},
{B00011111, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100},
{B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001110},
{B00010001, B00010001, B00010001, B00010001, B00010001, B00010001, B00001010, B00000100},
{B00010001, B00010001, B00010001, B00010001, B00010001, B00010101, B00010101, B00001010},
{B00010001, B00010001, B00001010, B00000100, B00000100, B00001010, B00010001, B00010001},
{B00010001, B00010001, B00001010, B00000100, B00000100, B00000100, B00000100, B00000100},
{B00011111, B00000001, B00000010, B00000100, B00001000, B00010000, B00010000, B00011111},
{B00001110, B00001000, B00001000, B00001000, B00001000, B00001000, B00001000, B00001110},
{B00010000, B00001000, B00001000, B00000100, B00000100, B00000010, B00000010, B00000001},
{B00001110, B00000010, B00000010, B00000010, B00000010, B00000010, B00000010, B00001110},
{B00000100, B00001010, B00010001, B00000000, B00000000, B00000000, B00000000, B00000000},
{B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00011111},
{B00001000, B00000100, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000},
{B00000000, B00000000, B00000000, B00001110, B00010010, B00010010, B00010010, B00001111},
{B00000000, B00010000, B00010000, B00010000, B00011100, B00010010, B00010010, B00011100},
{B00000000, B00000000, B00000000, B00001110, B00010000, B00010000, B00010000, B00001110},
{B00000000, B00000001, B00000001, B00000001, B00000111, B00001001, B00001001, B00000111},
{B00000000, B00000000, B00000000, B00011100, B00010010, B00011110, B00010000, B00001110},
{B00000000, B00000011, B00000100, B00000100, B00000110, B00000100, B00000100, B00000100},
{B00000000, B00001110, B00001010, B00001010, B00001110, B00000010, B00000010, B00001100},
{B00000000, B00010000, B00010000, B00010000, B00011100, B00010010, B00010010, B00010010},
{B00000000, B00000000, B00000100, B00000000, B00000100, B00000100, B00000100, B00000100},
{B00000000, B00000010, B00000000, B00000010, B00000010, B00000010, B00000010, B00001100},
{B00000000, B00010000, B00010000, B00010100, B00011000, B00011000, B00010100, B00010000},
{B00000000, B00010000, B00010000, B00010000, B00010000, B00010000, B00010000, B00001100},
{B00000000, B00000000, B00000000, B00001010, B00010101, B00010001, B00010001, B00010001},
{B00000000, B00000000, B00000000, B00010100, B00011010, B00010010, B00010010, B00010010},
{B00000000, B00000000, B00000000, B00001100, B00010010, B00010010, B00010010, B00001100},
{B00000000, B00011100, B00010010, B00010010, B00011100, B00010000, B00010000, B00010000},
{B00000000, B00001110, B00010010, B00010010, B00001110, B00000010, B00000010, B00000001},
{B00000000, B00000000, B00000000, B00001010, B00001100, B00001000, B00001000, B00001000},
{B00000000, B00000000, B00001110, B00010000, B00001000, B00000100, B00000010, B00011110},
{B00000000, B00010000, B00010000, B00011100, B00010000, B00010000, B00010000, B00001100},
{B00000000, B00000000, B00000000, B00010010, B00010010, B00010010, B00010010, B00001100},
{B00000000, B00000000, B00000000, B00010001, B00010001, B00010001, B00001010, B00000100},
{B00000000, B00000000, B00000000, B00010001, B00010001, B00010001, B00010101, B00001010},
{B00000000, B00000000, B00000000, B00010001, B00001010, B00000100, B00001010, B00010001},
{B00000000, B00000000, B00010001, B00001010, B00000100, B00001000, B00001000, B00010000},
{B00000000, B00000000, B00000000, B00011111, B00000010, B00000100, B00001000, B00011111},
{B00000010, B00000100, B00000100, B00000100, B00001000, B00000100, B00000100, B00000010},
{B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100, B00000100},
{B00001000, B00000100, B00000100, B00000100, B00000010, B00000100, B00000100, B00001000},
{B00000000, B00000000, B00000000, B00001010, B00011110, B00010100, B00000000, B00000000}
};
//fijamos a 0 todas las posiciones de la matriz con el siguiente bucle
void clearDisplay() {
for (byte x=0; x<8; x++) {
buffer[x] = B00000000;
}
screenUpdate();
}
//Inicializamos el microcontrolador de la matriz llamando a los pines antes declarados como salida y definimos los pines de salida.
void initMAX7219() {
pinMode(DataPin, OUTPUT);
pinMode(LoadPin, OUTPUT);
pinMode(ClockPin, OUTPUT);
clearDisplay();
writeData(B00001011, B00000111);
writeData(B00001001, B00000000);
writeData(B00001100, B00000001);
intensity(1);
}
//Programamos que la matriz haga el scroll traduciendo de binario a leds encendidos y apagados
void intensity(int intensity) {
writeData(B00001010, intensity);
}
void writeData(byte MSB, byte LSB) {
byte mask;
digitalWrite(LoadPin, LOW);
for (mask = B10000000; mask>0; mask >>= 1) {
digitalWrite(ClockPin, LOW);
if (MSB & mask){
digitalWrite(DataPin,HIGH);
}
else{
digitalWrite(DataPin,LOW);
}
digitalWrite(ClockPin, HIGH);
}
for (mask = B10000000; mask>0; mask >>= 1) {
digitalWrite(ClockPin, LOW);
if (LSB & mask){
digitalWrite(DataPin,HIGH);
}
else{
digitalWrite(DataPin,LOW);
}
digitalWrite(ClockPin, HIGH);
}
digitalWrite(LoadPin, HIGH);
digitalWrite(ClockPin, LOW);
}
void scroll(char myString[], int speed) {
byte firstChrRow, secondChrRow;
byte ledOutput;
byte chrPointer = 0;
byte Char1, Char2;
byte scrollBit = 0;
byte strLength = 0;
unsigned long time;
unsigned long counter;
while (myString[strLength]) {strLength++;}
counter = millis();
while (chrPointer < (strLength-1)) {
time = millis();
if (time > (counter + speed)) {
Char1 = myString[chrPointer];
Char2 = myString[chrPointer+1];
for (byte y= 0; y<8; y++) {
firstChrRow = pgm_read_byte(&font[Char1 – 32][y]);
secondChrRow = (pgm_read_byte(&font[Char2 – 32][y])) << 1;
ledOutput = (firstChrRow << scrollBit) | (secondChrRow >>
(8 – scrollBit) );
buffer[y] = ledOutput;
}
scrollBit++;
if (scrollBit > 6) {
scrollBit = 0;
chrPointer++;
}
counter = millis();
}
}
}
void screenUpdate() {
for (byte row = 0; row < 8; row++) {
writeData(row+1, buffer[row]);
}
}
void setup() {
initMAX7219();
Timer1.initialize(10000);
Timer1.attachInterrupt(screenUpdate);
}
void loop() {
clearDisplay();
scroll(» El cajon «, 100); //Escribir el mensaje a mostrar con intervalo de 100
scroll(» de Arduino «, 100); //Añada m´s lineas para mostrar mas texto
}
Vídeo de nuestros inicios usando la matriz de leds.
Como siempre, para cualquier duda no dudéis en consultar con nosotros más abajo.
Un saludo.
C.
problemas con
static byte font[][8] PROGMEM = {
Arroja lo siguiente:
variable 'font' must be const in order to be put into read-only section by means of '__attribute__((progmem))'
buenas necesito las librerias gracias
buenas necesito las librerias gracias
buenas, a mi no me funciono el programa, en todo me marca error