PEQUEÑA GUIA I2C LCD EN INGLES

Transcripción

1 PEQUEÑA GUIA I2C LCD EN INGLES!! PARA LOS NUEVOS Y NUEVAS COMRPAS!! SE HA ACTUALIZADO LAS LIBRERIAS, TODO LO DE ABAJO ES PARA MODELOS ANTIGUOS PERO LO DEJO PARA QUIEN LE INETRESE, LIBRERÍA NUEVA DESCARGAR AQUÍ: EXTRAIDO DE: DESCOMPRIME LA LIBRERIA, COPIA EL CONTENIDO ( examples, keywords, LiquidCrystal_I2C etc..) en la carpeta de : libraries LiquidCrustal borrando el antiguo contenido o sobre escribiéndolo con el nuevo. Dale al ejemplo de hello world una vez cargado instalado ( no te lvides de elegir el puerto conectar bien los cables de sda-a4 ; scl-a5 ; vcc-5v ; gnd-gnd y listo, ya deberá cargar sin problemas.

2 LCD screen is a character 1602 which is often used in the production of electronics and of course it's a simulation.it can be used to display two rows of characters, and each row is 16 characters. This is another great LCD display. With the limited pin resources, your project may be out of resources using normal LCD shield. With this I2C interface LCD module, you only need 2 lines (I2C) to display the information. If you already has I2C devices in your project, this LCD module actually cost no more resources at all. Fantastic for Arduino based project. Specification : 1 Interface: I2C 2 I2C Address: 0x27 3 Pin Definition : VCC GND SDA SCL 4 Back lit (Green with white char color) 5 Supply voltage: 5V 6 Contrast Adjust : Through Potentiometer

3 However, to control such a common module is not so easy. First of all, we must occupy the corresponding Arduino pin according to its 4 lines work mode or 8 lines work mode, but this actually occupied more digital I/O pin, especially 8 lines connection mode. Second,although there are corresponding libraries to support,but you should pass the debug,and run on Arduino successfully, at the same time it can meet a lot of problems. Finally, the code to control LCD need take up corresponding memory space, which is difficult for 16K memory space of Arduino. It can be easily connected with Arduino through sensor extended shield and special sensor cable. Contrast Adjust : The contrast can be adjusted by the potential-meter displayed in the following picture.

4 Please refer the official library : Library Support Functions : 1) LiquidCrystal() 2) begin() 3) clear() 4) home() 5) setcursor() 6) write() 7) print() 8) cursor() 9) nocursor() 10) blink() 11) noblink() 12) display() 13) nodisplay() 14) scrolldisplayleft() 15) scrolldisplayright() 16) autoscroll() 17) noautoscroll() 18) lefttoright() 19) righttoleft() 20) createchar()

5 Simple Test Code : #include <Wire.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27,16,2); void setup() lcd.init(); // initialization lcd.backlight(); lcd.print(" Welcome to "); //LCD1602 Display "Welcome to" lcd.setcursor(0, 1); //Set display location lcd.print(" //LCD1602 display " void loop() Refer To Test Code : ///Arduino Sample Code ///Last modified on 17th September 2010 #include <Wire.h> #include <LiquidCrystal_I2C.h>

6 LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 for a 16 chars and 2 line display void setup() lcd.init(); // initialize the lcd // Print a message to the LCD. lcd.backlight(); //lcd.setcursor(0, 1); lcd.print("hello, world!"); void loop() // when characters arrive over the serial port... if (Serial.available()) // wait a bit for the entire message to arrive delay(100); // clear the screen lcd.clear(); // read all the available characters while (Serial.available() > 0) // display each character to the LCD lcd.write(serial.read());

7 Voltage Test Result :

8 Click to download the LiquidCrystal_I2C Library : Refer Sample Code -1 : #include #include

9 LiquidCrystal_I2C lcd(0x27,16,2); //set the LCD address to 0x27 for a 16 chars and 2 line display void setup() lcd.init(); lcd.backlight(); lcd.setcursor(0, 0); lcd.print(" lcd.setcursor(0, 1); lcd.print("voltage: "); lcd.setcursor(13, 1); lcd.print("v"); void loop() int val; float temp; val=analogread(0); temp=val/4.092; val=(int)temp;// lcd.setcursor(9, 1); lcd.print(0x30+val/100,byte); lcd.print(0x30+(val%100)/10,byte); lcd.print('.'); lcd.print(0x30+val%10,byte);

10 delay(100); Refer Sample Code -2 : #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27,16,2); void setup() lcd.init(); // initialization lcd.clear(); lcd.backlight(); lcd.setcursor(0, 0); lcd.print("emartee.com"); Click to download the LiquidCrystal_I2C Library_1 :

11 Click to download the LiquidCrystal_I2C Library_2 : Mas librerias para el que le de probelmas gracias a un contribuidor de ebay : - Última versión de la librería, las anteriores no son compatibles con la última versión de la libreria Wire. - Modificación a hacer,elhilo está en alemán pero bueno, lo que hay que cambiar está en el último comentario. GRACIAS KLAUS!