关于串口通信的上位机都写完了但是总出现接收数据跳0的情况用串口助手测试没问题但是接到单片机的数据包就有问题目前还没找到解决办法拜求各位大神

小学工 2017-07-09 12:17:03

我把全部代码贴出来新手代码比较low 虚心请教

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent(); // 这里主要是显示的form里的实时时间用的委托
new Thread(() =>
{
while (true)
{
try { shijian.BeginInvoke(new MethodInvoker(() => shijian.Text = DateTime.Now.ToString("HH:mm tt"))); }
catch { }
try { shijian2.BeginInvoke(new MethodInvoker(() => shijian2.Text = DateTime.Now.ToString("yyyy/MM/dd dddd"))); }
catch { }

Thread.Sleep(1000);
}
})
{ IsBackground = true }.Start();
}

private void button2_Click(object sender, EventArgs e)
// 这里使用button按钮向单片机发送数据包，单片机接收到后开始给上位机发送数据
{

byte[] xxx = new byte[4];
xxx[0] = 0x11;
xxx[1] = 0x22;
xxx[2] = 0x33;
xxx[3] = 0x44;
serialPort1.Write(xxx, 0, 4);

}

private void Form1_Load(object sender, EventArgs e)
// 这里是显示的页面，我把页面贴出图片
{
Form2 frm = new Form2();
frm.ShowDialog();

CheckForIllegalCrossThreadCalls = false;
string[] ports = SerialPort.GetPortNames( );
comboBox1.Items.AddRange(ports);

if (ports.Length == 0)
{
MessageBox.Show("没有可用串口", "系统提示");
}
else
{
SerialPort serialPort1 = new SerialPort();

}
}

private void button1_Click(object sender, EventArgs e)
//这个button控件打开comboBox1中的串口名，如果没打开报出错误
{

if (comboBox1.Text == null)
{
MessageBox.Show("请打开串口", "系统提示", MessageBoxButtons.YesNoCancel);
}

if (serialPort1.IsOpen == false)
{
button1.Text = "打开串口";
serialPort1.PortName = comboBox1.Text.ToString();
serialPort1.PortName = comboBox1.Text;
serialPort1.BaudRate = 9600;

try
{
serialPort1.Open();
MessageBox.Show("串口已打开！", "系统提示");

}
catch (Exception ex)
{
//serialPort1 = new SerialPort();
MessageBox.Show(ex.Message);

}
}
else
{
button1.Text = "串口已打开";
}

}

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
/*这段是触发了控件的接收事件，开始接收数据解析数据包我感觉就是这里出了问题接收上来的数据会有挺长时间的延迟还会时不时的显示0.0 这种情况感觉不应该出现不想显示0.0 但出现这种情况的时候要让他显示上一个数据*/

{
SerialPort serialPort1 = sender as SerialPort;
byte[] shuju = new byte[serialPort1.ReadBufferSize];

serialPort1.Read(shuju, 0, shuju.Length);

if (shuju[0] == 0x5A)
{

if (shuju[5] == 0x01)
{

{

label8.Text = ((double)(shuju[6] * 256 + shuju[7]) / 10).ToString("f1");

}
}

if (shuju[5] == 0x03)
{

{

label9.Text = ((double)(shuju[6] * 256 + shuju[7]) / 10).ToString("f1");

}
}

if (shuju[5] == 0x05)
{

{

label10.Text = ((double)(shuju[6] * 256 + shuju[7]) / 10).ToString("f3");

}
}

}

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