using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO.Ports;
using System.Threading;

namespace Tps_LQ_Transmitter.com
{
    /// <summary>
    /// PCM控制与数据发送类
    /// </summary>
    class PcmControl:MySerial
    {
        SerialPort serial = null;
        public PcmControl()
        {
            serial = new SerialPort();
            serial.PortName = "COM5";     //PCM模块是RS232通信共用计算机的串口COM5
            serial.BaudRate = 115200;
            serial.DataBits = 8;
            serial.StopBits = StopBits.One;//停止位设置为com_stop的值
            serial.Parity = Parity.None;//获取奇偶校验选项的值
            serial.ReadTimeout = 1000;    //读取等待时间1000
            serial.RtsEnable = true;
            //this.DataReceived += new System.IO.Ports.SerialErrorReceivedEventHandler(this.Serial_DataReceived);
            if (!serial.IsOpen)
            {
                serial.Open();
            }

        }
 
        public override void portClose()
        {
            serial.Close();
        }

        /// <summary>
        /// PCM读写方法
        /// </summary>
        /// <param name="data">数据</param>
        /// <param name="delay">延时</param>
        /// <returns></returns>
        public byte[] WriteRead(byte[] data, int delay = 50)
        {
            if (data == null)
                return null;

            //先读空
            if (serial.BytesToRead > 0)
                serial.DiscardInBuffer();

            byte[] crc = crc16(data);
            byte[] newarray = new byte[data.Length + 2];
            Array.Copy(data, newarray, data.Length);
            newarray[data.Length] = crc[0];
            newarray[data.Length + 1] = crc[1];

            serial.Write(data, 0, data.Length);
            Thread.Sleep(delay);
            if (serial.BytesToRead > 0)
            {
                byte[] dat = new byte[serial.BytesToRead];
                serial.Read(dat, 0, dat.Length);
               


                return dat;
            }
            else
            {
                return data;
            }
        }
        /// <summary>
        /// PCM仅读方法
        /// </summary>
        /// <returns></returns>
        public byte[] OnlyRead()
        {

            if (serial.IsOpen == true)
            {
                if (serial.BytesToRead > 0)
                {
                    byte[] dat = new byte[serial.BytesToRead];
                    serial.Read(dat, 0, dat.Length);
                    return dat;
                }
                else
                {
                    return null;
                }
            }
            else
            {
                return null;
            }
        }
        /// <summary>
        /// PCM设置命令发送
        /// </summary>
        /// <param name="mode">发送模式选择："UART"/"HDLC"</param>
        /// <param name="choice">"ODD"/"EVEN"/"NONE"/"FALL"/"RISE"</param>
        /// <param name="baudrate">波特率</param>
        /// <returns>结果</returns>
        public bool Setting(string mode,string choice,int baudrate )
        {
            int u = 0;
            if (mode.ToUpper()=="UART")
            {
                u = u | 0x01;
            }
            else if (mode.ToUpper() == "HDLC")
            {
                u = u | 0x41;
            }

            if (choice.ToUpper() == "ODD")//奇校验
            {
                u = u | 0x02;
            }
            else if (choice.ToUpper() == "EVEN")//偶校验
            { 
                u = u | 0x04;
            }
            else if (choice.ToUpper() == "NONE")//无校验
            {
                u = u | 0x00;
            }
            else if (choice.ToUpper() == "FALL")//下降沿
            {
                u = u | 0x08;
            }
            else if (choice.ToUpper() == "RISE")//上升沿
            {
                u = u | 0x00;
            }
            int d =((50000000 / baudrate) + 2);
            bool bolrd = false;
            byte[] byst = { 0xF0, 0x0F, 0x02, 0x00, 0x00, 0x03, 0x00, 0xDB, 0x01 };
            byst[8] = (byte)u;
            byst[6] = (byte)((d & 0x0000ff00) >> 8);
            byst[7] = (byte)(d & 0x000000ff);
            byte[] byrd  = WriteRead(byst);
            if (byrd.Length>= byst.Length)
            {
                bolrd = true;
            }
            return bolrd;
        }
       
        /// <summary>
        /// PCM数据发送
        /// </summary>
        /// <param name="data"></param>
        /// <returns></returns>
        public bool DataSend(byte[] data,int delay=50)
        {
            bool bolrd = false;
            if (data!=null && data.Length>0)
            {
                byte[] sd = new byte[data.Length + 6];
                sd[0] = 0xF0;
                sd[1] = 0x0F;
                sd[2] = 0x03;
                sd[3] = 0x00;
                sd[4] = 0x00;
                sd[5] = (byte)data.Length;
                for (int i = 0; i < data.Length; i++)
                {
                    sd[6 + i] = data[i];
                }
                byte[] byrd = WriteRead(sd, delay);
                if (byrd.Length >= sd.Length)
                {
                    bolrd = true;
                }
            }
            return bolrd;
        }
        public void Serial_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            //
            //
        }
    }
}