clcd.c

/*
 * File:   clcd.c
 * Author: shummu
 *
 * Created on 24 September, 2023, 5:53 PM
 */


#include <xc.h>
#include "clcd.h"

void clcd_write(unsigned char byte, unsigned char mode)
{                     // 0x33                   RS = 0
    CLCD_RS = (__bit)mode; // RE2 
    
    CLCD_DATA_PORT = byte & 0xF0; //  PORTD = 0x33
    CLCD_EN = HI;
    __delay_us(100);
    CLCD_EN = LOW;
    
    CLCD_DATA_PORT=(unsigned char)((byte & 0x0F) << 4);
    CLCD_EN = HI;
    __delay_us(100);
    CLCD_EN = LOW;
    
    __delay_us(4100); //4.1msec
}

static void init_display_controller(void)
{
    /* Startup Time for the CLCD controller */
    __delay_ms(30);
    
    /* The CLCD Startup Sequence */
    clcd_write(EIGHT_BIT_MODE, INST_MODE);  
     __delay_us(4100);  // 4100usec = 4.1msec
     clcd_write(EIGHT_BIT_MODE, INST_MODE);
    __delay_us(100);
     clcd_write(EIGHT_BIT_MODE, INST_MODE);
     __delay_us(1); 
    
    clcd_write(FOUR_BIT_MODE,INST_MODE);   
     __delay_us(100);
     
    clcd_write(TWO_LINES_5x8_4_BIT_MODE,INST_MODE);   
     __delay_us(100);
     
     clcd_write(CLEAR_DISP_SCREEN, INST_MODE);
    __delay_us(500);
  
    clcd_write(DISP_ON_AND_CURSOR_OFF, INST_MODE);
    __delay_us(100);
}

void init_clcd(void)
{
    /* Setting the CLCD Data Port as Output */
    CLCD_DATA_PORT_DDR = 0x00;
    
    /* Setting the RS and EN lines as Output */
    CLCD_RS_DDR = 0;
    CLCD_EN_DDR = 0;
    
    init_display_controller();
}

void clcd_putch(const char data, unsigned char addr) //'A'
{
    clcd_write(addr, INST_MODE);
    clcd_write(data, DATA_MODE);
}

void clcd_print(const char *str, unsigned char addr)// Hello
{
    clcd_write(addr, INST_MODE); //0xC0
    
    while (*str != '\0')
    {
        clcd_write(*str, DATA_MODE); // H e l l 0
        str++;
    }
}