PIC16F-11-LCD-with-a-PIC-LCD-Functio& Implementations

// Function prototypes
void initializeLCD(void);
void clearLCD(void);
void sendCommandToLCD(unsigned char command);
void sendDataToLCD(unsigned char data);
void printToLCD(const char *string);
unsigned char moveCursorToPosition(unsigned char address);

void initializeLCD(void) {
    // Set pins as output
    ENABLE_DIRECTION    = 0;
    RS_DIRECTION        = 0;
    LCD_BUS_DIRECTION   = 0;

    // Write zero to pins and port
    ENABLE_LCD  = 0;
    RS_LCD      = 0;
    LCD_BUS     = 0;

    __delay_ms(10);          // 10 milliseconds delay

    // Initialization commands for LCD
    sendCommandToLCD(0x38); // Function set as given in datasheet
    sendCommandToLCD(0x0F); // Display ON; Cursor ON; Blink ON
    sendCommandToLCD(0x06); // Display shifting OFF
    clearLCD();             // Clear screen command
}

void clearLCD(void) {
    sendCommandToLCD(0x01); // Clear screen command
    __delay_ms(3);          // Delay for cursor to return home (minimum 3ms)
}

void sendCommandToLCD(unsigned char command) {
    RS_LCD = 0;             // Command RS must be low (0)
    LCD_BUS = command;      // Write command to data bus of LCD
    ENABLE_LCD = 1;         // Toggle Enable PIN to display data
    __delay_us(200);
    ENABLE_LCD = 0;
    __delay_us(200);
}

void sendDataToLCD(unsigned char data) {
    RS_LCD = 1;             // Data RS must be high (1)
    LCD_BUS = data;         // Write data to data bus of LCD
    ENABLE_LCD = 1;         // Toggle Enable PIN to display data
    __delay_us(200);
    ENABLE_LCD = 0;
    __delay_us(200);
}

void printToLCD(const char *string) {
    while(*string) {
        sendDataToLCD(*string++);   // Display data until string ends
    }
}

unsigned char moveCursorToPosition(unsigned char address) {
    // Valid addresses: 0x80 to 0xA8 for line one, 0xC0 to 0xE8 for line two
    if ((address >= 0x80 && address <= 0xA8) || (address >= 0xC0 && address <= 0xE8)) {
        sendCommandToLCD(address);
        return 1;
    } else {
        return 0;
    }
}