using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;
namespace elelab
{
   public class port
    {
        private SerialPort commPort = new SerialPort();
        public delegate void receive_data(byte[] port_data);
        public event receive_data port_event;
        //初始化端口 使用的时候必须先初始化
        //int com_count 端口号 1 - 100
        public bool init_wms_sys(int com_count)
        {
            commPort.PortName = "COM" + com_count.ToString();
            commPort.BaudRate = 9600;
            commPort.Parity = Parity.None;// Parity.Even;
            commPort.DataBits = 8;
            commPort.StopBits = StopBits.One;
            commPort.Encoding = Encoding.ASCII;
            commPort.WriteBufferSize = 0x5000;
            commPort.ReadBufferSize = 0x5000;//by dhwu 150130
            commPort.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
            commPort.ReceivedBytesThreshold = 1;
            try
            {
                commPort.Open();
            }
            catch
            {
                return false;
            }
          
            return true;
        }
        private void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            byte[] readBuffer = new byte[commPort.BytesToRead];
            commPort.Read(readBuffer, 0, readBuffer.Length);
            port_event(readBuffer);
        }
       //发送数据
       //byte[] byt 字节数组 发送内容
       public bool write_all_byte(byte[] byt)
        {//
            for (int i = 0; i < byt.Length; i++)
            {
                if (write_byte(byt[i]) == false)
                {
                    return false;
                }
            }
            return true;
        }
       private bool write_byte(byte byt)
        {
            byte[] byt1 = new byte[1];
            byt1[0] = byt;
            if (commPort.IsOpen)
            {
                try
                {
                    commPort.Write(byt1, 0, 1);
                }
                catch
                {
                    return false;
                }
                while (commPort.BytesToWrite != 0) ;
            }
            else
            {
                try
                {
                    commPort.Open();
                }
                catch
                {
                    return false;
                }
                if (commPort.IsOpen)
                {
                    try
                    {
                        commPort.Write(byt1, 0, 1);
                    }
                    catch
                    {
                        return false;
                    }
                    while (commPort.BytesToWrite != 0) ;
                }
            }
            return true;
        }
    }
}