feat: 全量同步 254 个常用的 Arduino 扩展库文件

arduino-libs/arduino-cli/libraries/FreqCount/examples/LCD_Output/LCD_Output.pde

@@ -0,0 +1,26 @@
+/* FreqCount - Example with LCD output
+ * http://www.pjrc.com/teensy/td_libs_FreqCount.html
+ *
+ * This example code is in the public domain.
+ */
+#include <FreqCount.h>
+#include <LiquidCrystal.h>
+
+LiquidCrystal lcd(5, 4, 3, 2, 1, 0);
+
+void setup() {
+  Serial.begin(57600);
+  lcd.begin(8, 2);
+  lcd.print("Freq:");
+  FreqCount.begin(1000);
+}
+
+void loop() {
+  if (FreqCount.available()) {
+    unsigned long count = FreqCount.read();
+    lcd.setCursor(0, 1);
+    lcd.print(count);
+    lcd.print("       ");
+  }
+}
+