Sanal seri port üzerinden PIC16F877A ile C# haberleşmesi

using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO.Ports;

namespace WindowsFormsApplication4
{
    public partial class Form1 : Form
    {
        SerialPort picport = new SerialPort("COM5", 9600, Parity.None, 8, StopBits.One);
       
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
       
        {
      
        }

        private void timer1_Tick(object sender, EventArgs e)
        {

           label4.Text = picport.ReadExisting();
            
        }
        
        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            picport.Open();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            picport.Close();
        }

      
 
    }
   
}

#include <xc.h>
#include <pic16f877a.h>
#define _XTAL_FREQ 4000000
#pragma config FOSC = HS 
#pragma config WDTE = OFF 
#pragma config PWRTE = OFF
#pragma config BOREN = ON 
#pragma config LVP = OFF 
#pragma config CPD = OFF 
#pragma config WRT = OFF 
#pragma config CP = OFF 

char UART_Init(const long int);
void UART_Write(char);
void UART_Write_Text(char*text);
void UART_numara(unsigned int num);

void main(void)
 {
      int digital=0;
     
      ADCON0bits.ADCS0=0; // analog saat kaynak seçimi
      ADCON0bits.ADCS1=1; // FOSC/8
      ADCON1bits.ADCS2=0; //
      ADCON0bits.ADON=1;   // A/D on biti
      ADCON1bits.PCFG0 =0; //Analog Digital konfigürasyon kontrol bitleri
      ADCON1bits.PCFG1 =0; //Tüm analog pinler açıldı 
      ADCON1bits.PCFG2 =0;
      ADCON1bits.PCFG3 =0;
      ADCON1bits.ADFM =1; // Bitler sağa yaslandı
      ADCON0bits.CHS2=0; // AN1 kanalı seçildi
      ADCON0bits.CHS1=0;
      ADCON0bits.CHS0=1;
       
	  UART_Init(9600);
	  	
   while (1){
	    	
        ADCON0bits.GO =1; // ADC Çevrimine başlandı
		__delay_us(20);
	    while(ADCON0bits.GO_nDONE); //bitene kadar bekle
			
	    digital = ADRESH*256 + ADRESL; 
	    digital = (digital/10)-25;
		UART_numara(digital);
		UART_Write_Text("mm");
		UART_Write_Text("\n");
		__delay_ms(200);
		
			}
		}

char UART_Init(const long int baudrate)
{
  unsigned int x;
 
    x = (_XTAL_FREQ - baudrate*16)/(baudrate*16); // Yüksek baudrate ayarı SPBRG için
    BRGH = 1;                                     //Yüksek baudrate ayarı seçildi
  
  if(x<256)
  {
    SPBRG = x;                                   
    SYNC = 0;                                     //Setting Asynchronous Mode, ie UART
    SPEN = 1;                                     //Seri portu açma
    TRISC7 = 1;                                   //TRISC7 portları ayarlandı
    TRISC6 = 1;                                   //TRISC6
    CREN = 1;                                     //Sürekli veri alma
    TXEN = 1;                                     //Göndermeyi aktif etme
    return 1;                                     
  }
  return 0;                                       
}

void UART_Write(char data)
{
  while(!TRMT); // veri gelene kadar bekle 1 olduğunda veri yollar
  TXREG = data; // Gönderme bitine veriler aktarıldı
}

void UART_Write_Text(char *text)
{
  int i;
  for(i=0;text[i]!='\0';i++)
    UART_Write(text[i]);
}

void UART_numara(unsigned int num)
{
	   
	   UART_Write((num/10000)+0x30);
	   num=num%10000;
	   
	   UART_Write((num/1000)+0x30);
	   num=num%1000;
 
	   UART_Write((num/100)+0x30);
	   num=num%100;
 
	   UART_Write((num/10)+0x30);
 
       UART_Write((num%10)+0x30);
}