IclcdClear()

IclcdClear() clears the LCD screen.

bool IclcdClear(uint8_t device = 0)

Commands

Command	Arguments	Return Value	Operation
`IclcdClear(device)`	`uint8_t device = 0`	`bool`	Clears the LCD screen.

Example

This example uses a PCF8574 character LCD at I²C address 0x27. Send c from Serial Monitor to clear the text on the display.

bool lcdReady = false;
 
void setup() {
  Serial.begin(115200);
  lcdReady = IclcdBegin(0x27, 20, 4);  // Initialize the LCD and check the connection.
  if (!lcdReady) {
    Serial.println(F("LCD not found"));
    return;
  }
  IclcdPrint(F("Press c to clear"));  // Show text before clearing the display.
}
 
void loop() {
  if (!lcdReady || !Serial.available()) return;
  if (Serial.read() != 'c') return;
  if (IclcdClear()) {  // Clear the LCD screen.
    Serial.println(F("LCD cleared"));
  }
}

Precautions

PCF8574 connections use the same mapping as the existing CLCD library: P0=RS, P1=R/W, P2=Enable, P3=backlight, P4~P7=LCD D4~D7.
Verify the LCD module's actual I²C address using its settings and I²C scan results.
SDA/SCL can share the bus with other I²C devices, but addresses must not overlap.
Do not run Wire transfers or I²C slave callbacks concurrently with Iclcd…(). Iclcd transfers run at 100 kHz and then restore the previous TWI settings.
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

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ILOGICS Product Documentation

Table of Contents

IclcdClear()

Commands

Example

Precautions

Built-in Commands in the Same Category