藍天。玄舍。這起航的旅程

Visual Studio ( Windows Form ) 程式碼 :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace RS232_TF
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            serialPort1.Close();
            CheckForIllegalCrossThreadCalls = false;        //允許 Text 跨執行緒作業無效
            
            //取得所有可用的連接埠
            foreach(string com in System.IO.Ports.SerialPort.GetPortNames())
            {
                comboBox2.Items.Add(com);
            }
        }

        //設定通訊埠的Baud Rate
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.BaudRate = Convert.ToInt32(comboBox1.Text);
        }

        //設定通訊埠的Chanel
        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.PortName = Convert.ToString(comboBox2.Text);
        }

        //收到資料
        private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                if (serialPort1.BytesToRead != 0)
                {
                    string message = serialPort1.ReadTo(Convert.ToString('\n')); //將資料讀取至'\n'
                    textBox1.Text += Convert.ToString(message) + '\r' + '\n';
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.Close();
                comboBox1.Enabled = true;
                comboBox2.Enabled = true;
                button1.Text = "啟動";
            }
            else
            {
                serialPort1.Open();
                comboBox1.Enabled = false;
                comboBox2.Enabled = false;
                button1.Text = "中斷";
                textBox1.Text += "Connect" + '\r' + '\n';
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            serialPort1.Write("" + textBox2.Text + '\n'); //輸出字
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {

        }

    }
}

8051燒錄程式碼 ( Keil ) :

void main( void ){
    int i;
    System_Init();
    
    printf("Hello World!\r\n");
    while(1){
        if( b1s ){
            b1s = 0;
            LED ^= 1;
        }
        if( bRI ){
            bRI = 0;            
        }
        if( B_Print ){
            B_Print = 0;            
            printf( "%s\r\n" , BufRx );
        }
    }
}

void RS233() interrupt 4 {
    char ch;
    if( RI ){
        RI = 0;
        ch = SBUF;
        bRI = 1;
        word = ch;
        
        if( ( ch != LF ) && ( ch != CR ) ) {    // if not (carriage return) or (line feed)
            BufRx[BufIndex++] = ch;                //put received data to BufRx[]
            BufIndex &= 0x3F;                   // Boundary of BufIndex is 0-63
        }
        if ( (ch == CR )|| (ch == LF) ) {             
            BufRx[BufIndex++] = 0;
            for( C_Bufindex = BufIndex; C_Bufindex < 32; C_Bufindex++ ) BufRx[C_Bufindex] = 0;
            B_Print = 1;                        
            BufIndex = 0;        
        }
        
    }else{
        TI = 0;
        bTI = 1;
    }
}

char putchar( char ch ){
    static int i;
    bTI = 0;    
    while ( (!bTI) && ( i < 2000 ) ) i++;
    i = 0;
    SBUF = ch;
    return ch;
}