Arduino LCD库.docx

LCDLiquidCrystal?LibraryThis library allows an Arduino board to control?LiquidCrystal?displays (LCDs) based on the Hitachi?HD44780?(or a compatible) chipset, which is found on most text-based?LCDs. The library works with in either 4- or 8-bit mode (i.e. using 4 or 8 data lines in addition to the rs, enable, and, optionally, the rw control lines).FunctionLiquidCrystal()begin()clear()home()setCursor()write()print()cursor()noCursor()blink()noBlink()display()noDisplay()scrollDisplayLeft()scrollDisplayRight()autoscroll()noAutoscroll()leftToRight()rightToLeft()createChar()LiquidCrystal()DescriptionCreates a variable of type?LiquidCrystal. The display can be controlled using 4 or 8 data lines. If the former, omit the pin numbers for d0 to d3 and leave those lines unconnected. The RW pin can be tied to ground instead of connected to a pin on the Arduino; if so, omit it from this functions parameters.SyntaxLiquidCrystal(rs, enable, d4, d5, d6, d7)?LiquidCrystal(rs, rw, enable, d4, d5, d6, d7)?LiquidCrystal(rs, enable, d0, d1, d2, d3, d4, d5, d6, d7)?LiquidCrystal(rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7)Parametersrs: the number of the Arduino pin that is connected to the RS pin on the LCDrw: the number of the Arduino pin that is connected to the RW pin on the LCD (optional)enable: the number of the Arduino pin that is connected to the enable pin on the LCDd0, d1, d2, d3, d4, d5, d6, d7: the numbers of the Arduino pins that are connected to the corresponding data pins on the LCD. d0, d1, d2, and d3 are optional; if omitted, the LCD will be controlled using only the four data lines (d4, d5, d6, d7).Example#include LiquidCrystal.hLiquidCrystallcd(12, 11, 10, 5, 4, 3, 2);void setup(){lcd.print(hello, world!);}void loop() {}begin()DescriptionSpecifies the dimensions (width and height) of the display.Syntaxlcd.begin(cols, rows)Parameterslcd: a variable of type?LiquidCrystalcols: the number of columns that the display hasrows: the number of rows that the display has?clear()De