Programacion

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace LCD_16x2_UART_01
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

byte[] buffer = { 0,0,0,0,0,0 };

private void Form1_Load(object sender, EventArgs e)
        {
            serialPort1.Open();
            serialPort1.Write(buffer, 0, 1);
            lcd_init();
            lcd_cmd(0x0f); //Parpadea y muestra cursor
            lcd_cmd(0x01); //limpia pantalla
        }

private void button1_Click(object sender, EventArgs e)
        {
            string cadena = txtLCD.Text;
            int indice = cadena.IndexOf('\n');
            if (indice != -1)
            {
                string linea1, linea2;
                linea1 = cadena.Substring(0, indice - 1);
                linea2 = cadena.Substring(indice + 1);
                lcd_cmd(0x01); //limpia pantalla
                lcd_cmd(0x02); //Primera linea
                lcd_out(linea1);
                lcd_cmd(0xC0); //Segunda linea
                lcd_out(linea2);
            }
            else
            {
                lcd_cmd(0x02); //Primera linea
                lcd_out(cadena);
            }
        }

private void lcd_init()
        {
            buffer[0] = 0x38;
            buffer[1] = 0x3C;
            buffer[2] = 0x38;
            serialPort1.Write(buffer, 0, 3);
            Thread.Sleep(5);

buffer[0] = 0x38;
            buffer[1] = 0x3C;
            buffer[2] = 0x38;
            serialPort1.Write(buffer, 0, 3);
            Thread.Sleep(1);

buffer[0] = 0x38;
            buffer[1] = 0x3C;
            buffer[2] = 0x38;
            serialPort1.Write(buffer, 0, 3);
            Thread.Sleep(5);

buffer[0] = 0x28;
            buffer[1] = 0x2C;
            buffer[2] = 0x28;
            serialPort1.Write(buffer, 0, 3);
            Thread.Sleep(1);

lcd_cmd(0x28);
            lcd_cmd(0x08);
            lcd_cmd(0x01);
            lcd_cmd(0x0F);
            Thread.Sleep(100);
        }

private void lcd_cmd(byte cmd)
        {
            buffer[0] = (byte)((cmd & 0xF0) + 8);
            buffer[1] = (byte)((cmd & 0xF0) + 12);
            buffer[2] = (byte)((cmd & 0xF0) + 8);
            buffer[3] = (byte)(((cmd << 4) & 0xF0) + 8);
            buffer[4] = (byte)(((cmd << 4) & 0xF0) + 12);
            buffer[5] = (byte)(((cmd << 4) & 0xF0) + 8);
            serialPort1.Write(buffer, 0, 6);
            Thread.Sleep(1);
        }

private void lcd_chr(char ltr)
        {
            buffer[0] = (byte)((ltr & 0xF0) + 9);
            buffer[1] = (byte)((ltr & 0xF0) + 13);
            buffer[2] = (byte)((ltr & 0xF0) + 9);
            buffer[3] = (byte)(((ltr << 4) & 0xF0) + 9);
            buffer[4] = (byte)(((ltr << 4) & 0xF0) + 13);
            buffer[5] = (byte)(((ltr << 4) & 0xF0) + 9);
            serialPort1.Write(buffer, 0, 6);
            Thread.Sleep(1);
        }

private void lcd_out(string word)
        {
            for (byte i = 0; i < word.Length; i++)
            {
                lcd_chr(word[i]);
                Thread.Sleep(1);
            }
        }

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            serialPort1.Close();
        }
    }
}

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