Utilizarea portului USB

Utilizarea portului USB pentru comunicatii

    Portul serial a fost utilizat pentru a realiza prima legatura intre doua calculatoare. Portul serial este des utilizat si in prezent pentru a conecta diverse dispozitive la calculator. Chiar daca majoritatea calculatoarelor nu mai dispun fizic de un port serial, se utilizeaza des porturi seriale virtuale, realizate prin intermediul portului USB (Universal Serial Bus). Cu alte cuvinte exista o serie de dispozitive conectate la calculator prin intermediul USB insa din punct de vedere logic ele sunt conectate printr-un port serial virtual.

    Vom lucra cu un sistem de achizitie date bazat pe controlerul Arduino UNO


    Sistemul de achizitie dispune de 5 intrari analogice 4 digitale si 8 iesiri digitale, conectate astfel:

     Pentru programator, conectarea prin USB este identica cu o conectare prin intermediul unui port serial fizic. Conectarea prin intermediul portului USB fiind deci "transparenta" din punctul de vedere al scrierii aplicatiilor, acestea fiind scrise la fel cu aplicatiile pentru portul serial.

  • Configurarea si initializarea portului serial

    C# - selectarea portului dorit 

                int i, j;
            // Listez porturile seriale
            Nume_porturi = System.IO.Ports.SerialPort.GetPortNames();
            this.Porturi_s.Items.Clear();

            //Adaug porturile exixtente

            for (i = 0; i < Nume_porturi.Length; i++)
            {
                this.Porturi_s.Items.Add(Nume_porturi[i]);

            }

            //Pozitionarea listei pe primul element
            this.Porturi_s.SelectedIndex = 0;


         Unde "Porturi_s" este un obiect de tip ListBox.

    C# - Conectarea la portul dorit 

                if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.textBox1.Text = "AA";
            this.serialPort1.Write("AA");


    C# - Deconectarea de la portul serial 

                this.serialPort1.Close();
            this.label1.Text = "Portul este deconectat!";


    C# - scrierea si citirea portului serial 

                cda = this.textBox1.Text;
 
            if (this.serialPort1.IsOpen)
            {
               this.serialPort1.Write(cda);
               txt = "";
               txt = this.serialPort1.ReadExisting();
               if (txt.Length > 0)
               {
                  this.textBox2.Text = txt;  
               }
               else
               {
                  this.label1.Text = "Nu vin date!";
               }
            }




    Utilizare sistem de achizitie

        Pentru a putea fi utilizat, portul serial trebuie configurat, cu alte cuvinte trebuiesc stabilite valorile pentru diversi parametri, cum ar fi: viteza de lucru, lungimea cuvantului, paritate etc.
        In vederea utilizarii portului serial, deschidem un nou proiect C# Windows Forms Application intitulat "RS_232_v1" . In cadrul acestei aplicatii, e nevoie de o interfata care sa permita selectarea portului serial, deschiderea si inchiderea acestuia, stabilirea unui sir de caractere pentru a fi trimis prin portul serial, trimiterea acestuia, citirea unui sir de caractere si afisarea sirului citit. Vom plasa deci



        Obiectul de tip "ListBox" este folosit pentru selectarea unui port serial. La un moment dat pot fi deschise mai multe porturi seriale, deci trebuie sa dispunem de o metoda prin care sa selectam portul serial dorit.
        Obiectul de tip "ListBox" este cel mai potrivit pentru a selecta unul din porturile seriale cu conditia ca in momentul lansarii aplicatiei sa fie insctrise elementele listei cu numele porturilor deschise in acel moment.

  • Citire intrari analogice



        Codul sursa fiind: 

    namespace RS_232_v01
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string txt, cda;
        int k;
        static String[] Nume_porturi = new String[11];
        private void Form1_Load(object sender, EventArgs e)
        {
            int i, j;
            // Listez porturile seriale
            Nume_porturi = System.IO.Ports.SerialPort.GetPortNames();
            this.Porturi_s.Items.Clear();

            //Adaug porturile exixtente

            for (i = 0; i < Nume_porturi.Length; i++)
            {
                this.Porturi_s.Items.Add(Nume_porturi[i]);
            }

            //Pozitionarea listei pe primul element
            this.Porturi_s.SelectedIndex = 0;
            this.label1.Text = "Conectati-va la portul serial!";

        }

        private void but_con_Click(object sender, EventArgs e)
        {
            if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.textBox1.Text = "AA";
            this.serialPort1.Write("AA");
        }

        private void but_dec_Click(object sender, EventArgs e)
        {
            this.serialPort1.Close();
            this.label1.Text = "Portul este deconectat!";

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            k++;
            if (k > 123456789)
                k = 0;
            this.label2.Text = k.ToString();

            cda = this.textBox1.Text;
 
            if (this.serialPort1.IsOpen)
            {
               this.serialPort1.Write(cda);
               txt = "";
               txt = this.serialPort1.ReadExisting();
               if (txt.Length > 0)
               {
                  this.textBox2.Text = txt;  
               }
               else
               {
                  this.label1.Text = "Nu vin date!";
               }
            }
        }
    }
}

        Datele primite trebiesc despachetate pentru a putea fi utilizate. Urmatoarea aplicatie "RS_232_v02" Extrage valorie V4-V0 din sirul primit. 



    namespace RS232_v02
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string cda, rec;
        int k;
        static String[] Nume_porturi = new String[11];
        private void Form1_Load(object sender, EventArgs e)
        {
            int i, j;
            // Listez porturile seriale
            Nume_porturi = System.IO.Ports.SerialPort.GetPortNames();
            this.Porturi_s.Items.Clear();

            //Adaug porturile exixtente

            for (i = 0; i < Nume_porturi.Length; i++)
            {
                this.Porturi_s.Items.Add(Nume_porturi[i]);
            }

            //Pozitionarea listei pe primul element
            this.Porturi_s.SelectedIndex = 0;
            this.label1.Text = "Conectati-va la portul serial!";

        }

        private void but_con_Click(object sender, EventArgs e)
        {
            if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.textBox1.Text = "AA";
            this.serialPort1.Write("AA");
        }

        private void but_con_Click_1(object sender, EventArgs e)
        {
            if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.textBox1.Text = "AA";
            this.serialPort1.Write("AA");
        }

        private void but_dec_Click(object sender, EventArgs e)
        {
            this.serialPort1.Close();
            this.label1.Text = "Portul este deconectat!";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            k++;
            if (k > 123456789)
                k = 0;
            this.label2.Text = k.ToString();

            cda = this.textBox1.Text;

            if (this.serialPort1.IsOpen)
            {
                this.serialPort1.Write(cda);
                rec = "";
                rec = this.serialPort1.ReadExisting();
                if (rec.Length > 0)
                {
                    this.textBox2.Text = rec;
                    int p1 = rec.IndexOf(",");
                    int p2 = rec.IndexOf(",", p1 + 1);
                    int p3 = rec.IndexOf(",", p2 + 1);
                    int p4 = rec.IndexOf(",", p3 + 1);
                    int p5 = rec.IndexOf(",", p4 + 1);
                    int p6 = rec.IndexOf(",", p5 + 1);
                    this.label7.Text = "V4: \n\n" + rec.Substring(p1 + 1, p2 - p1 - 1);
                    this.label8.Text = "V3: \n\n" + rec.Substring(p2 + 1, p3 - p2 - 1);
                    this.label9.Text = "V2: \n\n" + rec.Substring(p3 + 1, p4 - p3 - 1);
                    this.label10.Text = "V1: \n\n" + rec.Substring(p4 + 1, p5 - p4 - 1);
                    this.label11.Text = "V0: \n\n" + rec.Substring(p5 + 1, p6 - p5 - 1);

                }
                else
                {
                    this.label1.Text = "Nu vin date!";
                    this.label10.Text = " ";
                    this.label9.Text = " ";
                    this.label8.Text = " ";
                    this.label7.Text = " ";
                }
            }
        }
    }
}

        Se observa ca p1-p6 sunt pozitiile in care se gaseste separatorul "," iar p6 este pozitia in care se termina sirul, respectiv lungimea acestuia. Pozitia este determinata folosind metoda "IndexOf". Pentru a extrage parametrul curent, stiindu-se pozitia celor doi separatori "," adica inceputul si sfarsitul subsirului ce reprezinta parametrul respectiv, s-a folosit metoda "Substring".

  • Comanda iesiri digitale

        Urmatoarea aplicatie utilizeaza iesirile digitale: 



    namespace RS_232_v00
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string txt, cda;
        int k;
        static String[] Nume_porturi = new String[11];
        private void Form1_Load(object sender, EventArgs e)
        {
            int i, j;
            // Listez porturile seriale
            Nume_porturi = System.IO.Ports.SerialPort.GetPortNames();
            this.Porturi_s.Items.Clear();

            //Adaug porturile exixtente

            for (i = 0; i < Nume_porturi.Length; i++)
            {
                this.Porturi_s.Items.Add(Nume_porturi[i]);
            }

            //Pozitionarea listei pe primul element
            this.Porturi_s.SelectedIndex = 0;
            this.label1.Text = "Conectati-va la portul serial!";
        }

        private void but_con_Click(object sender, EventArgs e)
        {
            if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.serialPort1.Write("O77");
        }

        private void but_dec_Click(object sender, EventArgs e)
        {
            this.serialPort1.Close();
            this.label1.Text = "Portul este deconectat!";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            k++;
            if (k > 123456789)
                k = 0;
            this.label2.Text = k.ToString();

            cda = "O" + System.Convert.ToString(this.numericUpDown1.Value);

            if (this.serialPort1.IsOpen)
            {
                this.serialPort1.Write(cda);
                txt = "";
                txt = this.serialPort1.ReadExisting();
                if (txt.Length > 0)
                {
                    this.textBox2.Text = txt;
                }
                else
                {
                    this.label1.Text = "Nu vin date!";
                }
            }
        }
    }
}


  • Multiio

        Urmatoarea aplicatie utilizeaza intrarile analogice, digitale si iesirile digitale: 



    namespace Multiio_v05
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public System.Drawing.Graphics desen;
        public System.Drawing.Pen creion_blu;
        public System.Drawing.Pen creion_rosu;
        public System.Drawing.Pen creion_gri;
        public System.Drawing.SolidBrush pens_blu;
        public System.Drawing.SolidBrush pens_red;
        public System.Drawing.SolidBrush pens_back;
        public System.Drawing.SolidBrush radiera;
        public System.Drawing.Font font_nina;
        public binar binar1;
        public osciloscop grafic0;
        public osciloscop grafic1;
        public termo termo1;
        public termo termo2;
        public termo termo3;
        public termo termo4;
        public termo termo5;
        int a0_pozx = 350, a0_pozy = 50, a0_n_maxx = 300, a0_n_maxy = 200;
        Int32 a0_val, a0_val_max = 500, k, suma;
        int a1_pozx = 700, a1_pozy = 50, a1_n_maxx = 300, a1_n_maxy = 200;
        Int32 a1_val, a1_val_max = 1000;
        Int32 a2_val, a3_val, a4_val, a5_val;
        UInt64 digi;
        string txt, cda;
        int c0, c1, c2, c3, c4, c5, c6, c7, val_cmd, val_cmd_v;
        static int[] a0_valori = new int[0];
        static int[] a1_valori = new int[0];
        static String[] date_r = new String[11]; // Date receptionate
        static String[] date_c = new String[11]; // Date check - verificate daca sunt ok
        static String delimStr = " ,.:\t";
        static Char[] delimiter = delimStr.ToCharArray();
        static String[] Nume_porturi = new String[11];

        // --------------   Osciloscop ------------------ 

        public class osciloscop
        {
            int x0;
            int y0;
            int w;
            int h;
            int val_max,val_max_af, val, val_v;
            int nr_max;
            System.Drawing.Graphics zona_des;
            System.Drawing.Pen creion_r = new System.Drawing.Pen(System.Drawing.Color.Red);
            System.Drawing.Font font_ni = new System.Drawing.Font("Nina", 8);
            System.Drawing.SolidBrush pens_blu = new System.Drawing.SolidBrush(System.Drawing.Color.Blue);
            System.Drawing.SolidBrush radiera = new System.Drawing.SolidBrush(System.Drawing.Color.White);

            System.Drawing.Bitmap img;
            System.Drawing.Bitmap ims;

            public void setval(int[] vals, int nrv)
            {
                img = new Bitmap(nr_max, val_max, zona_des);
                int val, i, j;

                // afisare grafic sub forma de puncte

                val_v = System.Convert.ToInt16(System.Convert.ToDouble(vals[0]) * (System.Convert.ToDouble(h) / System.Convert.ToDouble(val_max))); //scalare
                for (i = 0; i < w; i++)
                {

                    val = System.Convert.ToInt16(System.Convert.ToDouble(vals[i]) * (System.Convert.ToDouble(h) / System.Convert.ToDouble(val_max))); //scalare
                    if (val_v < val)
                    {
                        for (j = val_v; j <= val; j++)
                            img.SetPixel(i, j, System.Drawing.Color.Red);
                    }
                    else
                    {
                        for (j = val; j <= val_v; j++)
                            img.SetPixel(i, j, System.Drawing.Color.Red);

                    }
                    val_v = val;
                }
                zona_des.DrawImage(ims, x0, y0);
                zona_des.DrawImage(img, x0, y0);

                //zona_des.FillRectangle(radiera, x0, y0 + h, w + 20, 20);
                for (i = 0; i <= w; i += 50)
                {
                    val = System.Convert.ToInt16(System.Convert.ToDouble(i) * (System.Convert.ToDouble(nr_max) / System.Convert.ToDouble(w))); //scalare
                    zona_des.DrawString(val.ToString(), font_ni, pens_blu, x0 + i, y0 + h);
                }
                //zona_des.FillRectangle(radiera, x0 - 20, y0 - 10, 20, h + 20);
                for (i = 0; i <= h; i += 50)
                {
                    val = System.Convert.ToInt16(System.Convert.ToDouble(i) * (System.Convert.ToDouble(val_max_af) / System.Convert.ToDouble(h))); //scalare
                    zona_des.DrawString(val.ToString(), font_ni, pens_blu, x0 - 20, y0 + h - i - 10);
                }

            }
            public osciloscop(System.Drawing.Graphics desen, int pozx, int pozy, int n_maxx, int n_maxy, int vmaxa)
            {
                x0 = pozx;
                y0 = pozy;
                w = n_maxx;
                h = n_maxy;
                nr_max = n_maxx;
                val_max = n_maxy;
                val_max_af = vmaxa;
                zona_des = desen;
                int i, j;
                img = new Bitmap(nr_max, n_maxy, zona_des);
                ims = new Bitmap(nr_max, n_maxy, zona_des);
                // sterg imaginea

                for (j = 0; j < val_max; j++)
                {
                    for (i = 0; i < nr_max; i++)
                    {
                        ims.SetPixel(i, j, System.Drawing.Color.WhiteSmoke);
                    }
                }
                // grid
                for (j = 0; j < val_max; j++)
                {

                    // grid orizontal


                    if (j % 10 == 0)
                    {
                        for (i = 0; i < nr_max; i++)
                        {
                            if (j % 50 == 0)
                                ims.SetPixel(i, j, System.Drawing.Color.Gray);
                            else
                                ims.SetPixel(i, j, System.Drawing.Color.LightGray);
                        }
                    }
                    else
                    {

                        // grid orizontal vertical

                        for (i = 0; i < nr_max; i++)
                        {
                            if (i % 10 == 0)
                            {
                                if (i % 50 == 0)
                                    ims.SetPixel(i, j, System.Drawing.Color.Gray);
                                else
                                    ims.SetPixel(i, j, System.Drawing.Color.LightGray);
                            }
                        }
                    }
                }

                //chenar

                for (i = 0; i < n_maxx; i++)
                {
                    ims.SetPixel(i, 0, System.Drawing.Color.Blue);
                    ims.SetPixel(i, val_max - 1, System.Drawing.Color.Blue);
                }
                for (j = 0; j < val_max; j++)
                {
                    ims.SetPixel(0, j, System.Drawing.Color.Blue);
                    ims.SetPixel(nr_max - 1, j, System.Drawing.Color.Blue);
                }

            }

        }

        // -------------- Clasa instrument ------------------ 
        public class binar
        {
            int x0;
            int y0;
            int w;
            int h;
            public void setval(int nrb, UInt64 n, System.Drawing.Graphics zona_des, System.Drawing.Pen creion, System.Drawing.SolidBrush pens_albastra, System.Drawing.SolidBrush radiera)
            {

                int wb = w / (3 * nrb);
                int hb = h / 3;
                int x = x0 + w - 3 * wb;
                int y = y0 + hb;
                int i;
                //zona_des.DrawRectangle(creion, x0, y0, w, h);
                for (i = nrb - 1; i >= 0; i--)
                {
                    System.UInt64 bit = ((n >> (nrb - i - 1)) & 1);
                    zona_des.DrawRectangle(creion, x - 1, y - 1, wb + 1, hb + 1);
                    if (bit == 1)
                        zona_des.FillRectangle(pens_albastra, x, y, wb, hb);
                    else
                        zona_des.FillRectangle(radiera, x, y, wb, hb);

                    x -= 3 * wb;

                }
            }
            public void init_binar(int pozx, int pozy, int lat, int inalt)
            {
                x0 = pozx;
                y0 = pozy;
                w = lat;
                h = inalt;
            }
        }

        public class termo
        {
            int x0;
            int y0;
            int w;
            int h;
            int val_max;
            public void desenez(System.Drawing.Graphics zona_des, System.Drawing.Pen creion_a, System.Drawing.Pen creion_gr, System.Drawing.SolidBrush pens_r, System.Drawing.Font font_ni)
            {
                zona_des.DrawRectangle(creion_a, x0, y0, w, h);
                for (int j = 0; j <= h; j += 5)// desenez gradatii
                {
                    if (j % 25 == 0)
                    {
                        zona_des.DrawLine(creion_gr, x0 + w + 2, y0 + j, x0 + w + 12, y0 + j);
                        zona_des.DrawString(System.Convert.ToString(val_max - j * val_max / h), font_ni, pens_r, x0 + w + 20, y0 + j - 7);
                    }
                    else
                    {
                        zona_des.DrawLine(creion_gr, x0 + w + 2, y0 + j, x0 + w + 7, y0 + j);
                    }
                }



            }
            public void sterg(System.Drawing.Graphics zona_des, System.Drawing.SolidBrush rad)
            {
                zona_des.FillRectangle(rad, x0 + 1, y0 + 1, w - 1, h - 1);
            }

            public void setval(float val, System.Drawing.Graphics zona_des, System.Drawing.SolidBrush pens_r, System.Drawing.SolidBrush pens_b)
            {
                val = System.Convert.ToInt16(System.Convert.ToDouble(val) * (System.Convert.ToDouble(h) / System.Convert.ToDouble(val_max))); //scalare
                zona_des.FillRectangle(pens_b, x0 + 1, y0 + 1, w - 1, h - 1);
                zona_des.FillRectangle(pens_r, x0 + 1, y0 + h - val, w - 1, val);

            }
            public termo(int pozx, int pozy, int lat, int inalt, int vmax)
            {
                x0 = pozx;
                y0 = pozy;
                w = lat;
                h = inalt;
                val_max = vmax;
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            date_r = "0,0,0,0,0,0,0,0,0,0,0".Split(delimiter);
            date_c = "0,0,0,0,0,0,0,0,0,0,0".Split(delimiter);
            desen = this.CreateGraphics();
            creion_blu = new System.Drawing.Pen(System.Drawing.Color.Blue);
            creion_rosu = new System.Drawing.Pen(System.Drawing.Color.Red);
            creion_gri = new System.Drawing.Pen(System.Drawing.Color.LightGray);
            pens_blu = new System.Drawing.SolidBrush(System.Drawing.Color.Blue);
            pens_red = new System.Drawing.SolidBrush(System.Drawing.Color.Red);
            pens_back = new System.Drawing.SolidBrush(this.BackColor);
            font_nina = new System.Drawing.Font("Nina", 8);
            binar1 = new binar();
            binar1.init_binar(0, 275, 330, 30);
            Array.Resize(ref a0_valori, a0_n_maxx + 1);
            grafic0 = new osciloscop(desen, a0_pozx, a0_pozy, a0_n_maxx, a0_n_maxy, a0_val_max);
            Array.Resize(ref a1_valori, a1_n_maxx + 1);
            grafic1 = new osciloscop(desen, a1_pozx, a1_pozy, a1_n_maxx, a1_n_maxy, a1_val_max);
            termo1 = new termo(10, 50, 10, 200, 1023);
            termo2 = new termo(65, 50, 10, 200, 1023);
            termo3 = new termo(120, 50, 10, 200, 1023);
            termo4 = new termo(175, 50, 10, 200, 1023);
            termo5 = new termo(230, 50, 10, 200, 1023);
            //int i, j;
            // Listez porturile seriale
            Nume_porturi = System.IO.Ports.SerialPort.GetPortNames();
            this.Porturi_s.Items.Clear();

            //Adaug porturile exixtente

            for (int i = 0; i < Nume_porturi.Length; i++)
            {
                this.Porturi_s.Items.Add(Nume_porturi[i]);
            }

            //Pozitionarea listei pe primul element
            this.Porturi_s.SelectedIndex = 0;
            this.label1.Text = "Conectati-va la portul serial!";

 

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            k++;
            if (k > 123456789)
                k = 0;
            this.label2.Text = k.ToString();
            if (this.checkBox8.Checked)
                c0 = 1;
            else
                c0 = 0;
            if (this.checkBox7.Checked)
                c1 = 1;
            else
                c1 = 0;
            if (this.checkBox6.Checked)
                c2 = 1;
            else
                c2 = 0;
            if (this.checkBox5.Checked)
                c3 = 1;
            else
                c3 = 0;
            if (this.checkBox4.Checked)
                c4 = 1;
            else
                c4 = 0;
            if (this.checkBox3.Checked)
                c5 = 1;
            else
                c5 = 0;
            if (this.checkBox2.Checked)
                c6 = 1;
            else
                c6 = 0;
            if (this.checkBox1.Checked)
                c7 = 1;
            else
                c7 = 0;

            val_cmd = 128 * c7 + 64 * c6 + 32 * c5 + 16 * c4 + 8 * c3 + 4 * c2 + 2 * c1 + c0;

            this.label16.Text = System.Convert.ToString(val_cmd);
            int transl = 0;
            int amplif = a0_n_maxy;
            int zero = a0_n_maxy - 1;

            if (this.serialPort1.IsOpen)
            {
                if (val_cmd == val_cmd_v)  //  nu am val_cmd noua deci lanxsez comanda "AA"
                {
                    cda = "AA" + val_cmd.ToString();
                    this.serialPort1.Write(cda);
                    txt = "";
                    txt = this.serialPort1.ReadExisting();
                    if (txt.Length > 0)
                    {
                        //this.label1.Text = txt;
                        //Despachetare date
                        date_r = txt.Split(delimiter);
                        if (date_r.Length == 8) //Verific daca am primit 8 valori
                        {
                            //Pentru comanda M1, verific daca sum ade control e corecta
                            //suma = Convert.ToInt16(date_r[0]) + Convert.ToInt16(date_r[1]) + Convert.ToInt16(date_r[2]) + Convert.ToInt16(date_r[3]) + Convert.ToInt16(date_r[4]) + Convert.ToInt16(date_r[5]) + Convert.ToInt16(date_r[6]) + Convert.ToInt16(date_r[7]);
                            //if (suma % 1024 == Convert.ToInt16(date_r[8]))
                            //{
                            this.label1.Text = txt;
                            date_c = txt.Split(delimiter);
                            //}
                        }
                        // Afisare A1
                        try
                        {
                            a0_val = System.Convert.ToInt16(date_c[2]);
                        }
                        catch (System.FormatException)
                        {
                            this.label1.Text = "Format necorespunzator!";
                        }

                        catch (System.IndexOutOfRangeException)
                        {
                            this.label1.Text = "Format necorespunzator!";
                        }
                        // Trasare grafic
                        int f = System.Convert.ToInt32(transl + zero - amplif * System.Convert.ToDouble(a0_val) / a0_val_max);
                        if (f > a0_n_maxy)
                            f = a0_n_maxy - 1;
                        if (f < 0)
                            f = 0;

                        for (int i =0;i< a0_n_maxx - 1; i++)
                        {
                            a0_valori[i] = a0_valori[i + 1];
                        }
                        a0_valori[a0_n_maxx - 1] = f;

                        //desen.DrawImage(im, a0_pozx, a0_pozy);
                        grafic0.setval(a0_valori, a0_n_maxx);

                        // Afisare A0
                        try
                        {
                            a1_val = System.Convert.ToInt16(date_c[1]);
                        }
                        catch (System.FormatException)
                        {
                            this.label1.Text = "Format necorespunzator!";
                        }

                        catch (System.IndexOutOfRangeException)
                        {
                            this.label1.Text = "Format necorespunzator!";
                        }
                        // Trasare grafic

                        f = System.Convert.ToInt32(transl + zero - amplif * System.Convert.ToDouble(a1_val) / a1_val_max);
                        if (f > a1_n_maxy)
                            f = a1_n_maxy - 1;
                        if (f < 0)
                            f = 0;
                        for (int i = 0; i < a1_n_maxx - 1; i++)
                        {
                            a1_valori[i] = a1_valori[i + 1];
                        }
                        a1_valori[a1_n_maxx - 1] = f;

                        //desen.DrawImage(im, a1_pozx, a1_pozy);
                        grafic1.setval(a1_valori, a1_n_maxx);

                        //Afisare valori analogice

                        try
                        {
                            a2_val = System.Convert.ToInt16(date_c[5]);
                            a3_val = System.Convert.ToInt16(date_c[4]);
                            a4_val = System.Convert.ToInt16(date_c[3]);
                            a5_val = System.Convert.ToInt16(date_c[2]);
                            this.label4.Text = date_c[5].ToString();
                            this.label6.Text = date_c[4].ToString();
                            this.label8.Text = date_c[3].ToString();
                            this.label10.Text = date_c[2].ToString();
                            this.label12.Text = date_c[1].ToString();
                            this.label14.Text = date_c[0].ToString();
                            digi = System.Convert.ToUInt64(date_c[7]);
                            this.label26.Text = System.Convert.ToString(digi);
                        }
                        catch (System.FormatException)
                        {
                            this.label1.Text = "Format necorespunzator!";
                        }

                        // Afisare DI sub forma binara

                        binar1.setval(8, digi, desen, creion_rosu, pens_blu, pens_back);

                        //Afisare termo1
                        termo1.desenez(desen, creion_blu, creion_gri, pens_red, font_nina);
                        termo1.setval(System.Convert.ToInt16(date_c[5]), desen, pens_blu, pens_back);
                        termo2.desenez(desen, creion_blu, creion_gri, pens_red, font_nina);
                        termo2.setval(System.Convert.ToInt16(date_c[4]), desen, pens_blu, pens_back);
                        termo3.desenez(desen, creion_blu, creion_gri, pens_red, font_nina);
                        termo3.setval(System.Convert.ToInt16(date_c[3]), desen, pens_blu, pens_back);
                        termo4.desenez(desen, creion_blu, creion_gri, pens_red, font_nina);
                        termo4.setval(System.Convert.ToInt16(date_c[2]), desen, pens_blu, pens_back);
                        termo5.desenez(desen, creion_blu, creion_gri, pens_red, font_nina);
                        termo5.setval(System.Convert.ToInt16(date_c[1]), desen, pens_blu, pens_back);
                    }
                    else
                    {
                        this.label1.Text = "Nu vin date!";
                    }
                }
                else   //trebuie sa dau comanda "O,val_cmd"
                {
                    this.serialPort1.Write("O" + System.Convert.ToString(val_cmd));
                    val_cmd_v = val_cmd;
                }
            }
           

        }

        private void but_con_Click(object sender, EventArgs e)
        {
            if (!this.serialPort1.IsOpen)
            {
                this.serialPort1.PortName = System.Convert.ToString(this.Porturi_s.Items[this.Porturi_s.SelectedIndex]);
                this.serialPort1.Open();
                this.label1.Text = "Portul a fost deschis";
            }
            else
            {
                this.label1.Text = "Portul este deja deschis deschis";
            }
            this.serialPort1.Write("AA");
        }

        private void but_dec_Click(object sender, EventArgs e)
        {
            this.serialPort1.Close();
            this.label1.Text = "Portul este deconectat!";
        }
    }
}