Differences

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--- en-us_commands:reference:iclcdclear [2026/09/07 21:52] – 만듦 - 바깥 편집 127.0.0.1
+++ en-us_commands:reference:iclcdclear [2026/09/12 23:27] (current) – 바깥 편집 127.0.0.1
@@ Line 14: / Line 14: @@
 ===== Example =====
+This example uses a PCF8574 character LCD at I²C address ''0x27''. Send ''c'' from Serial Monitor to clear the text on the display.
 <code cpp>
-bool IclcdBegin(uint8_t address, uint8_t columns, uint8_t rows,
+bool lcdReady = false;
-                bool backlight = true, uint8_t device = 0);
-bool IclcdClear(uint8_t device = 0);
+void setup() {
-bool IclcdHome(uint8_t device = 0);
+  Serial.begin(115200);
-bool IclcdSetCursor(uint8_t column, uint8_t row, uint8_t device = 0);
+  lcdReady = IclcdBegin(0x27, 20, 4);  // Initialize the LCD and check the connection.
-bool IclcdDisplay(bool on = true, uint8_t device = 0);
+  if (!lcdReady) {
-bool IclcdCursor(bool on = true, uint8_t device = 0);
+    Serial.println(F("LCD not found"));
-bool IclcdBlink(bool on = true, uint8_t device = 0);
+    return;
-bool IclcdBacklight(bool on = true, uint8_t device = 0);
+  }
-bool IclcdScrollLeft(uint8_t device = 0);
+  IclcdPrint(F("Press c to clear"));  // Show text before clearing the display.
-bool IclcdScrollRight(uint8_t device = 0);
+}
-bool IclcdTextDirection(bool leftToRight = true, uint8_t device = 0);
-bool IclcdAutoscroll(bool on = true, uint8_t device = 0);
+void loop() {
-bool IclcdCreateChar(uint8_t location, const uint8_t charmap[8],
+  if (!lcdReady || !Serial.available()) return;
-                     uint8_t device = 0);
+  if (Serial.read() != 'c') return;
-bool IclcdWrite(uint8_t value, uint8_t device = 0);
+  if (IclcdClear()) {  // Clear the LCD screen.
-bool IclcdCommand(uint8_t command, uint8_t device = 0);
+    Serial.println(F("LCD cleared"));
-bool IclcdPrint(...);
+  }
+}
 </code>
@@ Line 44: / Line 47: @@
   * On MPAINO, using D20/D21 for external interrupts prevents simultaneous I²C use.
   * ''IclcdCommand()'' can change the LCD state directly. Use it only if you understand HD44780 commands.
+===== Built-in Commands in the Same Category =====
+  * [[:en-us_commands:reference:iclcdbegin|IclcdBegin() View detailed description]]
+  * [[:en-us_commands:reference:iclcdhome|IclcdHome() View detailed description]]
+  * [[:en-us_commands:reference:iclcdsetcursor|IclcdSetCursor() View detailed description]]
+  * [[:en-us_commands:reference:iclcddisplay|IclcdDisplay() View detailed description]]
+  * [[:en-us_commands:reference:iclcdcursor|IclcdCursor() View detailed description]]
+  * [[:en-us_commands:reference:iclcdblink|IclcdBlink() View detailed description]]
+  * [[:en-us_commands:reference:iclcdbacklight|IclcdBacklight() View detailed description]]
+  * [[:en-us_commands:reference:iclcdscrollleft|IclcdScrollLeft() View detailed description]]
+  * [[:en-us_commands:reference:iclcdscrollright|IclcdScrollRight() View detailed description]]
+  * [[:en-us_commands:reference:iclcdtextdirection|IclcdTextDirection() View detailed description]]
+  * [[:en-us_commands:reference:iclcdautoscroll|IclcdAutoscroll() View detailed description]]
+  * [[:en-us_commands:reference:iclcdcreatechar|IclcdCreateChar() View detailed description]]
+  * [[:en-us_commands:reference:iclcdwrite|IclcdWrite() View detailed description]]
+  * [[:en-us_commands:reference:iclcdcommand|IclcdCommand() View detailed description]]
+  * [[:en-us_commands:reference:iclcdprint|IclcdPrint() View detailed description]]
 [[:en-us_commands:builtin|← Built-in Command List]]