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.Media;

namespace Cuenta_regresiva_UART_01
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

byte[] buffer = { 1 };
        SoundPlayer tic;
        byte cnt = 10;
        int displays;
        int unidad, decena;

private void Form1_Load(object sender, EventArgs e)
        {
            serialPort1.Open();
            serialPort1.Write(buffer, 0, 1);
        }

private void btnIniciar_Click(object sender, EventArgs e)
        {
            cnt = (byte)nudInicio.Value;
            tic = new SoundPlayer("tic-tac_loop.wav");
            tic.PlayLooping();
            timer1.Enabled = true;
            nudInicio.Enabled = false;
            btnIniciar.Enabled = false;
        }

private void timer1_Tick(object sender, EventArgs e)
        {
            lblNumero.Text = cnt.ToString("D2");
            unidad = cnt % 10;
            decena = cnt / 10;
            displays = unidad << 4;
            displays = displays + decena;
            if (cnt == 0)
            {
                tic.Stop();
                timer1.Enabled = false;
                tic = new SoundPlayer("tic-tac_end.wav");
                tic.Play();
                nudInicio.Enabled = true;
                btnIniciar.Enabled = true;
            }
            else
                cnt--;
            buffer[0] = (byte)displays;
            serialPort1.Write(buffer, 0, 1);
        }

private void nudInicio_ValueChanged(object sender, EventArgs e)
        {
            cnt = (byte)nudInicio.Value;
            lblNumero.Text = cnt.ToString("D2");
            unidad = cnt % 10;
            decena = cnt / 10;
            displays = unidad << 4;
            displays = displays + decena;
            buffer[0] = (byte)displays;
            serialPort1.Write(buffer, 0, 1);
        }

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            buffer[0] = 255;
            serialPort1.Write(buffer, 0, 1);
            serialPort1.Close();
        }
    }
}

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