Differences

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--- en-us_commands:reference:iclcdclear [2026/09/07 23:35] – 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>
-const uint8_t LCD_DEVICE = 0;
+bool lcdReady = false;
-const uint8_t degreeChar[8] = {0x0C, 0x12, 0x12, 0x0C, 0, 0, 0, 0};
 void setup() {
-  if (!IclcdBegin(0x27, 20, 4, true, LCD_DEVICE)) return;  // Set the address and dimensions of the PCF8574 character LCD.
+  Serial.begin(115200);
-  IclcdCreateChar(0, degreeChar, LCD_DEVICE);  // Register a custom character.
+  lcdReady = IclcdBegin(0x27, 20, 4);  // Initialize the LCD and check the connection.
-  IclcdClear(LCD_DEVICE);  // Clear the LCD screen.
+  if (!lcdReady) {
-  IclcdHome(LCD_DEVICE);  // Move the cursor to the first position.
+    Serial.println(F("LCD not found"));
-  IclcdDisplay(true, LCD_DEVICE);  // Turn the LCD display on or off.
+    return;
-  IclcdCursor(false, LCD_DEVICE);  // Show or hide the cursor.
+  }
-  IclcdBlink(false, LCD_DEVICE);  // Enable or disable cursor blinking.
+  IclcdPrint(F("Press c to clear"));  // Show text before clearing the display.
-  IclcdBacklight(true, LCD_DEVICE);  // Turn the LCD backlight on or off.
-  IclcdTextDirection(true, LCD_DEVICE);  // Set the direction in which characters are entered.
-  IclcdAutoscroll(false, LCD_DEVICE);  // Enable or disable autoscroll.
 }
 void loop() {
-  const float temperature = ntcReadf(0);  // Return the NTC 3950 10kΩ sensor temperature as a floating-point value in °C.
+  if (!lcdReady || !Serial.available()) return;
-  IclcdSetCursor(0, 0, LCD_DEVICE);  // Move the cursor to the specified column and row.
+  if (Serial.read() != 'c') return;
-  IclcdPrint(F("Temperature"), LCD_DEVICE);  // Print a string or number to the LCD.
+  if (IclcdClear()) {  // Clear the LCD screen.
-  IclcdSetCursor(0, 1, LCD_DEVICE);  // Move the cursor to the specified column and row.
+    Serial.println(F("LCD cleared"));
-  IclcdPrint(temperature, 1, LCD_DEVICE);  // Print a string or number to the LCD.
+  }
-  IclcdWrite(0, LCD_DEVICE);  // Output a character code or custom character.
-  IclcdPrint('C', LCD_DEVICE);  // Print a string or number to the LCD.
-  if (Iup(0, IdigitalRead(0, 5))) IclcdScrollLeft(LCD_DEVICE);  // Shift the displayed content one position left. / Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. / Return true only at the instant the input changes from OFF to ON.
-  if (Iup(1, IdigitalRead(1, 5))) IclcdScrollRight(LCD_DEVICE);  // Shift the displayed content one position right. / Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. / Return true only at the instant the input changes from OFF to ON.
-  if (Iup(2, IdigitalRead(2, 5))) IclcdCommand(0x02, LCD_DEVICE);  // Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. / Send an LCD control command directly. / Return true only at the instant the input changes from OFF to ON.
 }
 </code>
@@ Line 55: / 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]]