morse-code/lcd.c at master · ahmadmhasann/morse-code · GitHub

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/*
 * LCD.c
 *
 *  Created on: Aug 23, 2019
 *      Author: Ahmed Hassan
 */
#include "types.h"
#include "lcd_cfg.h"
#include "lcd.h"
#include "dio.h"
#include <util/delay.h>


void lcd_vid_write_charachter (u8 data) {
#ifdef LCD_8bit
	dio_vid_set_pin_value(LCD_ControlPort, RS, 1);
	dio_vid_set_pin_value(LCD_ControlPort, RW, 0);
	dio_vid_set_port_value(LCD_DataPort, data);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);
#else
	u8 data1 = (data>>4)<<4;
	u8 data2 = data<<4;
	dio_vid_set_pin_value(LCD_ControlPort, RS, 1);
	dio_vid_set_pin_value(LCD_ControlPort, RW, 0);
	dio_vid_set_port_value(LCD_DataPort, data1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);
	dio_vid_set_port_value(LCD_DataPort, data2);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);


#endif

}

void lcd_vid_write_command (u8 command) {

#ifdef LCD_8bit
	dio_vid_set_pin_value(LCD_ControlPort, RS, 0);
	dio_vid_set_pin_value(LCD_ControlPort, RW, 0);
	dio_vid_set_port_value(LCD_DataPort, command);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);
#else
	u8 command1 = (command>>4)<<4;
	u8 command2 = command<<4;
	dio_vid_set_pin_value(LCD_ControlPort, RS, 0);
	dio_vid_set_pin_value(LCD_ControlPort, RW, 0);
	dio_vid_set_port_value(LCD_DataPort, command1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);
	dio_vid_set_port_value(LCD_DataPort, command2);
	dio_vid_set_pin_value(LCD_ControlPort, E, 1);
	_delay_ms(1);
	dio_vid_set_pin_value(LCD_ControlPort, E, 0);
	_delay_ms(1);


#endif


}


void lcd_vid_init(void) {

	dio_vid_set_port_direction(LCD_DataPort, 255);
	dio_vid_set_pin_direction(LCD_ControlPort, RS, 1);
	dio_vid_set_pin_direction(LCD_ControlPort, RW, 1);
	dio_vid_set_pin_direction(LCD_ControlPort, E, 1);
	_delay_ms(50);
#ifdef LCD_8bit
	lcd_vid_write_command(0b00111000);
#else
	lcd_vid_write_command(0b00101000);
#endif
	_delay_ms(1);
	lcd_vid_write_command(0b00001100);
	_delay_ms(1);
	lcd_vid_write_command(0b00000001);
	_delay_ms(15);
}


void lcd_vid_write_string(u8 str[]) {
	u8 i=0;
	while (str[i]!=0) {
		lcd_vid_write_charachter(str[i]);
		i++;
	}
}

void lcd_vid_write_number(s32 number) {
	if (number == 0) {
		lcd_vid_write_charachter('0');
		return;
	}
	else if (number<0) {
		lcd_vid_write_charachter('-');
		number*=-1;

	}
	u32 reservedNumber=1;
	while (number != 0) {
		reservedNumber = (reservedNumber*10) + (number%10);
		number/=10;
	}
	while (reservedNumber!=1) {
		lcd_vid_write_charachter((reservedNumber%10)+'0');
		reservedNumber/=10;
	}
}


void lcd_vid_set_position(u8 row, u8 col) {
	lcd_vid_write_command(128+col+row*64);
}


void lcd_vid_clear_screan (void) {
	lcd_vid_write_command(1);
	_delay_ms(15);
}