feat: 全量同步 254 个常用的 Arduino 扩展库文件

arduino-libs/arduino-cli/libraries/LiquidCrystal/examples/TextDirection/TextDirection.ino

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+/*
+ LiquidCrystal Library - TextDirection
+
+ Demonstrates the use a 16x2 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 demonstrates how to use leftToRight() and rightToLeft()
+ to move the cursor.
+
+ 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.
+
+ http://www.arduino.cc/en/Tutorial/LiquidCrystalTextDirection
+
+*/
+
+// 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);
+
+int thisChar = 'a';
+
+void setup() {
+  // set up the LCD's number of columns and rows:
+  lcd.begin(16, 2);
+  // turn on the cursor:
+  lcd.cursor();
+}
+
+void loop() {
+  // reverse directions at 'm':
+  if (thisChar == 'm') {
+    // go right for the next letter
+    lcd.rightToLeft();
+  }
+  // reverse again at 's':
+  if (thisChar == 's') {
+    // go left for the next letter
+    lcd.leftToRight();
+  }
+  // reset at 'z':
+  if (thisChar > 'z') {
+    // go to (0,0):
+    lcd.home();
+    // start again at 0
+    thisChar = 'a';
+  }
+  // print the character
+  lcd.write(thisChar);
+  // wait a second:
+  delay(1000);
+  // increment the letter:
+  thisChar++;
+}
+
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