Основы робототехники

Lcd setcursor

The Liquid Crystal Library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface.

This example sketch shows how to use the setCursor() method to reposition the cursor. To move the cursor, just call setCursor() with a row and column position. For example, for a 2×16 display:

Hardware Required

  • Arduino or Genuino Board
  • LCD Screen (compatible with Hitachi HD44780 driver)
  • pin headers to solder to the LCD display pins
  • 10k ohm potentiometer
  • 220 ohm resistor
  • hook-up wires
  • breadboard

Circuit

Before wiring the LCD screen to your Arduino or Genuino board we suggest to solder a pin header strip to the 14 (or 16) pin count connector of the LCD screen, as you can see in the image above.
To wire your LCD screen to your board, connect the following pins:

  • LCD RS pin to digital pin 12
  • LCD Enable pin to digital pin 11
  • LCD D4 pin to digital pin 5
  • LCD D5 pin to digital pin 4
  • LCD D6 pin to digital pin 3
  • LCD D7 pin to digital pin 2

Additionally, wire a 10k pot to +5V and GND, with it’s wiper (output) to LCD screens VO pin (pin3). A 220 ohm resistor is used to power the backlight of the display, usually on pin 15 and 16 of the LCD connector

click the images to enlarge

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Schematic

click the images to enlarge

image developed using Fritzing. For more circuit examples, see the Fritzing project page

/*
LiquidCrystal Library — setCursor

Demonstrates the use of a 16×2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.

This sketch prints to all the positions of the LCD using the
setCursor() method:

The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)

Library originally added 18 Apr 2008
by David A. Mellis
library modified 5 Jul 2009
by Limor Fried (http://www.ladyada.net)
example added 9 Jul 2009
by Tom Igoe
modified 22 Nov 2010
by Tom Igoe
modified 7 Nov 2016
by Arturo Guadalupi

This example code is in the public domain.

// include the library code:
#include LiquidCrystal.h

// initialize the library by associating any needed LCD interface pin
// with the Arduino pin number it is connected to
const int rs = 12 , en = 11 , d4 = 5 , d5 = 4 , d6 = 3 , d7 = 2 ;
LiquidCrystal lcd ( rs , en , d4 , d5 , d6 , d7 ) ;

// these constants won’t change. But you can change the size of
// your LCD using them:
const int numRows = 2 ;
const int numCols = 16 ;

void setup ( ) {
// set up the LCD’s number of columns and rows:
lcd. begin ( numCols , numRows ) ;
}

void loop ( ) {
// loop from ASCII ‘a’ to ASCII ‘z’:
for ( int thisLetter = ‘a’ ; thisLetter = ‘z’ ; thisLetter ++ ) {
// loop over the columns:
for ( int thisRow = 0 ; thisRow numRows ; thisRow ++ ) {
// loop over the rows:
for ( int thisCol = 0 ; thisCol numCols ; thisCol ++ ) {
// set the cursor position:
lcd. setCursor ( thisCol , thisRow ) ;
// print the letter:
lcd. write ( thisLetter ) ;
delay ( 200 ) ;
}
}
}
}


Источник: www.arduino.cc