Test of control of an economic array of LCD 8x8 matrix with reading a RTC module. The LCD matrix modules that I took are already grouped in 4 and can be connected to other modules in cascade, both horizontally and vertically. The library used uses the SPI connection (Serial Peripheral Interface) for module management and the RTC module uses I2C. In the Internet there are more easily individual 8x8 modules but these already assembled to 4 are also really comfortable because they are separable or connected in series with ease. The sketch runs on Nano but should be fine on all Arduini, if anything, check the correspondence of the signals on the pins. Libraries you can find them using automatic search of the IDE or on GitHub.
Dettaglio della connessione tra i singoli moduli.
The detail of the connection between the individual modules.
Il modulo acceso, molto luminoso.
The module turned on, very bright
// *********************************** // Test Controllo LCD array con RTC // Reteservizi di Paolo Fiaschi // 2016 // *********************************** #include#include #include #include #include "RTClib.h" // ************************************ // connessione modulo LED<->Arduino /* VCC<->5V GND<->GND DIN<->D11 CS <->D10 CLK<->D13 */ // connessione modulo RTC<->Arduino /* VCC<->5V GND<->GND SDA<->A4 SCL<->A5 */ // ************************************ int pinCS = 10; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI ) int numberOfHorizontalDisplays = 4; // numero display in orizzontale int numberOfVerticalDisplays = 1; // numero display in verticale Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays); RTC_DS1307 RTC; String tape = "Scritta scorrevole..."; int wait = 30; // velocità di scorrimento in milliseconds int spacer = 1; int width = 5 + spacer; // 5 pixel di larghezza font // senza spazi per presentarlo da solo String mesi[] = {" gen "," feb "," mar "," apr "," mag "," giu "," lug "," ago "," set "," ott "," nov "," dic "}; // senza spazi per presentarlo attaccato alla data String mesi1[] = {"gen","feb","mar","apr","mag","giu","lug","ago","set","ott","nov","dic"}; // ******************************************* void setup() { Serial.begin(9600); // *** init RTC Wire.begin(); RTC.begin(); // ************** // settaggio RTC // ************** //If we remove the comment from the following line, we will set up the module time and date with the computer one //RTC.adjust(DateTime(__DATE__, __TIME__)); matrix.setIntensity(7); // luminosità da 0 a 15 // impostazione del n. del display utilizzato e delle sue caratteristiche di visualizzazione // vedi le specifiche della libreria Max72xxPanel // Imposta le proprieta di ogni display 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); // Rovescia la visualizzazione del n display matrix.setRotation(1, 1); // Rovescia la visualizzazione del n display matrix.setRotation(2, 1); // Rovescia la visualizzazione del n display matrix.setRotation(3, 1); // Rovescia la visualizzazione del n display // test:accende un pixel alla locazione 0,0 e uno alla 32,7 /* matrix.fillScreen(LOW); matrix.drawPixel(0, 0, HIGH); matrix.drawPixel(32, 7, HIGH); matrix.write(); */ // recupera la data DateTime now = RTC.now(); } // ************************************* void loop() { // presenta la scritta scorrevole. StringScroll(tape); // recupera la data DateTime now = RTC.now(); //mostra la l'ora //String ora=now.hour()+":"+now.minute(); char buf[5]; sprintf(buf, "%02d:%02d", now.hour(), now.minute()); StringStatic(buf,2000); //StringStatic((String)now.hour()+":"+(String)now.minute(),2000); //mostra la la data //StringStatic((String)now.day()+" ",2000); // giorno da solo StringStatic((String)now.day()+mesi1[now.month()],2000); // giorno insieme al mese StringStatic((String)now.year(),2000); } // ************************************ // visualizza la stringa scorrevole sul display void StringScroll(String stringa) { for ( int i = 0 ; i < width * stringa.length() + matrix.width() - 1 - spacer; i++ ) { matrix.fillScreen(LOW); int letter = i / width; int x = (matrix.width() - 1) - i % width; int y = (matrix.height() - 8) / 2; while ( x + width - spacer >= 0 && letter >= 0 ) { if ( letter < stringa.length() ) { matrix.drawChar(x, y, stringa[letter], HIGH, LOW, 1); } letter--; x -= width; } matrix.write(); // Send bitmap to display delay(wait); } } // ************************************ // visualizza la stringa statica sul display per il tempo richiesto void StringStatic(String stringa, int tempo) { matrix.fillScreen(LOW); for ( int i = 0 ; i < width * stringa.length() + matrix.width() - 1 - spacer; i++ ) { int letter = i / width; int x = (matrix.width() - 1) - i % width; int y = (matrix.height() - 8) / 2; while ( x + width - spacer >= 0 && letter >= 0 ) { if ( letter < stringa.length() ) { matrix.drawChar(x, y, stringa[letter], HIGH, LOW, 1); } letter--; x -= width; if (letter==stringa.length()-1) break; } } matrix.write(); // Send bitmap to display delay(tempo); } // ********************************* // ricompone i dati dell'RTC in un unico buffer String ConvData(DateTime Data) { char buf[30]; sprintf(buf, "%02d/%02d/%04d %02d:%02d:%02d", Data.day(), Data.month(), Data.year(), Data.hour(), Data.minute(), Data.second()); return buf; }
