/// <summary>
/// 生成主机发送命令（功能码为03H（只读）时，生成全部命令；功能码为10H（写）时，生成部分命令（未生成写入的数据）；功能码为01H时，生成全部命令）
/// </summary>
/// <param name="address">设备地址</param>
/// <param name="functionCode">功能码</param>
/// <param name="start">起始地址（寄存器地址）</param>
/// <param name="registers">数据长度（寄存器数量）</param>
/// <param name="message">存放生成的主机发送命令</param>
public static void BuildMessage(byte address, byte functionCode, ushort start, ushort registers, ref byte[] message)
{
//用于存放生成的CRC码
// byte[] CRC = new byte[2];
byte[] CRC1 = new byte[2];
byte[] tst = new byte[2];
//生成主机发送命令
message[0] = address;
message[1] = functionCode;
message[2] = (byte)(start >> 8);
message[3] = (byte)start;
message[4] = (byte)(registers >> 8);
message[5] = (byte)registers;
//根据命令生成CRC码
// GetCRC(message, ref CRC);
TimerAction.crc16(message, Convert.ToUInt32(message.Length - 2), ref CRC1);
// message[message.Length - 2] = CRC[0];//低8位
// message[message.Length - 1] = CRC[1];//高8位
message[message.Length - 2] = CRC1[0]; //CRC高8位，电脑采用小端模式存数据
message[message.Length - 1] = CRC1[1]; //CRC低8位，Modbus采用大端模式
}
private void button5_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
if (button5.Text == "开始发送")
{
if (checkBox1.Checked == true)
{
type = 1;
timer1.Interval = Convert.ToInt32(numericUpDown1.Value) * 1000;
timer1.Enabled = true;
button1.Enabled = false;
}
else
{
TimerAction.timerAction(this, type);
}
}
else if (button5.Text == "停止发送")
{
timer1.Enabled = false;
button1.Enabled = true;
textBox1.Text = "";
groupBox2.Enabled = true;
button5.Text = "开始发送";
}
}
else
{
timer1.Enabled = false;
groupBox2.Enabled = true;
textBox1.Text = "";
button5.Text = "开始发送";
MessageBox.Show("请先打开串口 再发送数据");
}
}
private void timer1_Tick(object sender, EventArgs e)
{
TimerAction.timerAction(this, type);
}