// Define the pin mappings for LCD
#define RS_PIN 10  // Register Select (RS) connected to A9
#define E_PIN  15   // Enable (E) connected to A8

// Helper macros to control pins manually
#define RS_HIGH() (PORTK |= (1 << RS_PIN - 8))  //   Set A10 high (RS pin) on PORTK
#define RS_LOW() (PORTK &= ~(1 << RS_PIN - 8))  // Set A10 low (RS pin) on PORTK
#define E_HIGH() (PORTK |= (1 << E_PIN - 8))    // Set A15 high (E pin) on PORTK
#define E_LOW() (PORTK &= ~(1 << E_PIN - 8))


void lcdCommand(uint8_t cmd);
void lcdData(uint8_t data);
void lcdInit();
void lcdClear();
void lcdPulseEnable();
void lcdPrint(const char *str);



void setup() {
  // put your setup code here, to run once:

  DDRF = 0xFF;
  DDRK |= (1 << RS_PIN - 8) | (1 << E_PIN - 8);

   lcdInit();
  lcdClear();

   lcdCommand(0x80);  // Set cursor to the beginning of the first line (0x80)
  lcdPrint("Hello,");

//lcdCommand(0xC0 );  // Set cursor to the second line (0xC0)
  lcdPrint("How are you");


}



 void lcdInit() {
  delay(15);          // Wait for more than 15 ms after VCC rises to 4.5V
  lcdCommand(0x30);   // Function set: 8-bit interface
  delay(5);           // Wait for more than 4.1 ms
  lcdCommand(0x30);   // Repeat function set
  delayMicroseconds(100);  // Wait for more than 100 µs
  lcdCommand(0x30);   // Repeat function set
  lcdCommand(0x38);   // Function set: 8-bit interface, 2 lines, 5x8 dots
  lcdCommand(0x0C);   // Display ON, Cursor OFF, Blink OFF
  lcdCommand(0x06);   // Entry mode set: increment cursor, no shift
  lcdCommand(0x01);   // Clear display
  delay(5);           // Wait for display to clear
}


void lcdClear() {
  lcdCommand(0x01);  // Clear display command
  delay(5);          // Wait for the command to complete
}
void lcdCommand(uint8_t cmd) {
  RS_LOW();          // Set RS low for command mode
  PORTF = cmd;       // Put the command on the data bus (PORTF for A0-A7)
  lcdPulseEnable();  // Send the enable pulse
  delay(2);          // Wait for the command to complete
}
void lcdData(uint8_t data) {
  RS_HIGH();         // Set RS high for data mode
  PORTF = data;      // Put the data on the data bus (PORTF for A0-A7)
  lcdPulseEnable();  // Send the enable pulse
  delay(2);          // Wait for the data to be written
}

// Function to send a pulse on the enable line to latch data/command
void lcdPulseEnable() {
  E_HIGH();          // Set enable high
  delayMicroseconds(1);  // Short delay
  E_LOW();           // Set enable low
  delayMicroseconds(100);  // Wait for LCD to process
}
void lcdPrint(const char *str) {
  while (*str) {
    lcdData(*str);  // Send each character
    str++;          // Move to the next character
  }
}




void loop() {
  // put your main code here, to run repeatedly:

}