Un exemple avec les timer

Bonjour,

Les Timers sont des registres très utiles dans le pic. Ils peuvent simuler le fonctionnement multitâche grâce aux interruptions qui génèrent.  

Dans cet exemple je vais vous montrer comment créer  un signal PWM grâce aux interruption de timer1 d'une pic 16F628A ,

Le code :

int cnt=0;

void interrupt(){

if(TMR1IF_bit){

     cnt++;

     TMR1IF_bit=0;//l3alam yarja3 lelsfer

     TMR1H=0X00;

     TMR1L=0X00;//nfarghou timer1

     }

}

void main() {

portb=0X00;

trisb=0X00;//portb out

T1CON=0X31;//timer1 ye5dem ==TME1ON_bit=1 plus prescaler 1:8

TMR1IF_bit=0;//l3alam fil sfer

TMR1H=0X00;

TMR1L=0X00;//TIMER1 feregh

TMR1IE_bit=1;//INterruption masmou7a

INTCON=0XC0;//GIE et PEIE masmou7in zeda

while(1){

         if(cnt==100){

           portb=~portb;

           cnt=0;

         }

}//mise en veille

}

Visualiser le résultat sur le port B avec un oscilloscope.

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Use the PWM

This is a little demonstration of how to use the pwm library to controle the speed motor (but you can use it in many different ways).
the task:
Read an analogic commande from a potentiometre and transform it to commande the speed motor.
the code:
unsigned int commande=0;//the value delivred by the poteintiometre
unsigned int controle=0;//the puls width that commands the motor speed
void main() {
    
     adc_init();//analogic to digital converter module initialisation
     pwm1_init(10000);//Puls width modulation module initialisation with 10KHz
     pwm1_set_duty(controle);//the motor is stopped
     pwm1_start();
    
     while(1){
        commande=adc_read(0);//read anaolgic value from channel number 0
        controle=(commande/4);//adapt the value of the control to the commande
        pwm1_set_duty(controle);//update the value of the pulse width
     }
}
simulation:

  

enjoy :))

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Programme de gestion de stock avec c# et MySql

Bonjour tout le monde,
Je vous présente mon projet qui consiste à un simple programme de gestion de stock qu'il sera mis à jour plusieurs fois dans le future inch'Allah.

Le programme est codé avec c# et la base de donnés est créer avec mysql.
vous devez tout d'abord téléchargerle le pilote connector/net http://dev.mysql.com/downloads/connector/net/5.2.html qui va occupé à la connexion entre l'application c# et la base de donnés MySql.

Asservissement vitesse d'un moteur à courant continu

Dans le cadre d'un projet en matière technologie d’acquisition et d'interfaçage j'ai réaliser ce projet qui est mieux expliquer dans la photo en bas.

Schéma synoptique

l'interface:

 

La carte sur isis:

 PCB sur ARES:

 

Code en c#

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;
using System.IO.Ports;

namespace WindowsFormsApplication1
{
    using ZedGraph;
    public partial class Form1 : Form
    {
        float temps=0;
        float consigne=0;
        float commande=0;
        float fecartold;
        float fIntegral = 0;
        float fDerive = 0;
        float freponseOld=0;
        byte[] buffer = new byte[8];
        #region partie test pour une foction de transfert numerique        
        float reponse = 0;
        #endregion        
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            CreerGraphique(zedGraphControl1);
        }
        #region  creeer graphique
        private void CreerGraphique(ZedGraphControl zgc)
        {
            GraphPane Pane = zgc.GraphPane;
            PointPairList list1 = new PointPairList();
            PointPairList list2 = new PointPairList();
            PointPairList list3 = new PointPairList();
            LineItem CourbeConsigne = Pane.AddCurve("Consigne", list1, Color.Red);
            LineItem CourbeMesure = Pane.AddCurve("Commande", list2, Color.Black);
            LineItem CourbeCommande = Pane.AddCurve("Mesure", list3, Color.Green);
            Pane.Title.Text = "Simulation en temps réel de la vitesse";
            Pane.XAxis.Title.Text = "Axe X";
            Pane.YAxis.Title.Text = "Axe Y";
            CourbeConsigne.Symbol.Size = 1.0F;
            CourbeConsigne.Line.Width = 2.0F;
            CourbeMesure.Symbol.Size = 1.0F;
            CourbeMesure.Line.Width = 2.0F;
            CourbeCommande.Symbol.Size = 1.0F;
            CourbeCommande.Line.Width = 2.0F;
        }
        #endregion

        #region taswer mte3 lgraph
        private void addDataToGraph(ZedGraphControl zg1, XDate x, double tconsigne,double tcommande, double treponse )
        {
            LineItem curve = zg1.GraphPane.CurveList[0] as LineItem;
            IPointListEdit list = curve.Points as IPointListEdit;
            list.Add(x,tconsigne);
            LineItem curve2 = zg1.GraphPane.CurveList[1] as LineItem;
            IPointListEdit list2 = curve2.Points as IPointListEdit;
            list2.Add(x, tcommande);
            LineItem curve3 = zg1.GraphPane.CurveList[2] as LineItem;
            IPointListEdit list3 = curve3.Points as IPointListEdit;
            list3.Add(x, treponse);            
            zg1.Invalidate();
            zedGraphControl1.AxisChange();
        }
#endregion

    

        private void zedGraphControl1_Load(object sender, EventArgs e)
        {
        }

        private void rdncnvar_CheckedChanged(object sender, EventArgs e)
        {
            if (rdncnvar.Checked==true)
            {
                hscrCons.Value = 0;
                hscrCons.Enabled = true;
                NumConVar.Enabled = true;
            }
            else
            {
                hscrCons.Enabled = false;
                NumConVar.Text = "0";
                NumConVar.Enabled = false;
            }
        }

        private void hscrCons_Scroll(object sender, ScrollEventArgs e)
        {
            NumConVar.Text = hscrCons.Value.ToString();
        }

        private void chkConsBoucleOuverte_CheckedChanged(object sender, EventArgs e)
        {
            if (chkConsBoucleOuverte.Checked == true)
            {
                Régulation.Enabled = false;                
            }
            else
            {
                Régulation.Enabled = true;                
            }
        }

        private void btnOuvrPort_Click(object sender, EventArgs e)
        {
            try
            {
                serialPort1.Open();
                lbCommunication.BackColor = Color.Green;
                lbCommunication.Text = "Connexion établie";
                Consignes.Enabled = true;                
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString(), "Impossible d'ouvrir le port ");
                
            }
        }

        private void comboCom_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.PortName = comboCom.Text;
        }

        private void ComboBaude_SelectedIndexChanged(object sender, EventArgs e)
        {
            serialPort1.BaudRate = int.Parse(ComboBaude.Text);
        }

        private void btnFermPort_Click(object sender, EventArgs e)
        {
            timer.Enabled = false;
            serialPort1.Close();
            lbCommunication.BackColor = Color.Red;
            lbCommunication.Text = "Pas de connexion";
            Consignes.Enabled = false;
        }

        private void btnValider_Click(object sender, EventArgs e)
        {
          
            timer.Enabled = true;            
            
        }

        private void timer_Tick(object sender, EventArgs e)
        {
            float inter;
            temps += 0.1F;
            if (rdnEchel.Checked == true)
            {
                float.TryParse(numConEche.Text,out consigne);
            }
            if (rdnRamp.Checked == true)
            {
                if (consigne >= 100) consigne = 100;
                else
                {
                    float.TryParse(NumConRamp.Text, out inter);
                    consigne = inter * temps;
                }                
            }
            if (rdncnvar.Checked == true) //Consigne variable
            {
                float.TryParse(NumConVar.Text,out consigne);
            }            
            float rconsigne = (commande / 100) * 255;
            int iconsigne = (int)rconsigne;
            if (iconsigne>255)
            {
                iconsigne = 255;
            }
            else if(iconsigne<0)
            {
                iconsigne = 0;
            }
            txtMesVit.Text = iconsigne.ToString();
            #region envoi serial
            byte[] wbuffer = new byte[1];
            byte buffe = Convert.ToByte(iconsigne);
            wbuffer[0] = buffe;
            serialPort1.Write(wbuffer, 0, wbuffer.Length);
            #endregion  
            serialPort1.Read(buffer, 0, 1);            
            reponse= BitConverter.ToInt16(buffer, 0);
            reponse = (reponse / 255) * 100;
            if (chkConsBoucleOuverte.Checked == true) commande = consigne;
            else RegulationPID();
            prgbrVitesse.Value = (int)reponse;
            if (commande < 0) commande = 0;
            if (commande > 100) commande = 100;
            txtMesEcar.Text = commande.ToString();    
            addDataToGraph(zedGraphControl1, temps, consigne, commande, reponse);            
            serialPort1.DiscardInBuffer();
            serialPort1.DiscardOutBuffer();
            freponseOld = reponse;  //enregistre la dernière mesure de la reponse
        }
        
        private void button1_Click(object sender, EventArgs e)
        {
            timer.Enabled = false;
        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            if (chkSimul.Checked == true)
            {
                GrpRs232.Enabled = false;
                chkSimul.Text = "End Simulation";
                timer.Enabled = false;
                serialPort1.Close();
                lbCommunication.BackColor = Color.Red;
                lbCommunication.Text = "Pas de connexion";
                Consignes.Enabled = true;
            }
            if (chkSimul.Checked == false)
            {
                GrpRs232.Enabled = true;
                chkSimul.Text = "Start Simulation";
                Consignes.Enabled = false;
            }
        }

        private void RegulationPID()
        {
            float ftermeP = 0;
            float ftermeI = 0;
            float ftermeD = 0;
            float fEcart = consigne-reponse;
            if (rdbTypeIntegral.Checked == true)
            {
                float fI0 = (fEcart + fecartold) / 2f;
                fIntegral+=fI0;
            }
            else fIntegral=0F;

            if (rdbTypeDeriv.Checked == true)
            {
                fDerive = freponseOld - reponse;
            }
            else fDerive = 0f;
           float kp = 0;
           float Ti = 0;
           float Td = 0;
           float.TryParse(txtParaKp.Text.ToString(), out kp);
           float.TryParse(txtParaTi.Text.ToString(), out Ti);
           float.TryParse(txtParaTd.Text.ToString(), out Td);
           ftermeP = fEcart * kp;
           if (Ti > 0.01f)
           ftermeI = fIntegral / Ti;
           ftermeD = Td * fDerive;

           if (rdbTypeProp.Checked==true)//P
           {
               commande = ftermeP;
           }
           else if (rdbTypeIntegral.Checked == true)//PI
           {
               commande = ftermeP + ftermeI;
           }
           else
           {
               commande = ftermeP+ftermeI+ftermeD;
           }
            fecartold=fEcart;
        }

        private void numConEche_TextChanged(object sender, EventArgs e)
        {
            if (this.Text == "1") this.Text = "2";
        }

        private void lbCommunication_Click(object sender, EventArgs e)
        {

        }
    }
}

Code C for PIC
unsigned int reponse=0;
int commande=0;
char txt[4];
void init(){
adc_init();//initialisation du module ANALOGIQUE
uart1_init(9600);//initialisation du module RS232
pwm1_init(12000);
pwm1_set_duty(0);
pwm1_start();
}
void main() {
     init();
     while(1){
        reponse=adc_read(0);
        reponse/=4;
        uart1_write(reponse);
        delay_ms(10);
        if(uart1_data_ready()){
          commande=uart1_read();
          pwm1_set_duty(commande);
        }
     }
}

Voltmètre avec pic 16F877 et afficheur lcd

Le cahier de charge
Réaliser un voltmètre simple qui mesure le ddp entre deux point et qui affiche cette tension sur un afficheur lcd
Le code en mikroc:
sbit LCD_RS at RD4_bit;
sbit LCD_EN at RD5_bit;
sbit LCD_D4 at RD0_bit;
sbit LCD_D5 at RD1_bit;
sbit LCD_D6 at RD2_bit;
sbit LCD_D7 at RD3_bit;

sbit LCD_RS_Direction at TRISD4_bit;
sbit LCD_EN_Direction at TRISD5_bit;
sbit LCD_D4_Direction at TRISD0_bit;
sbit LCD_D5_Direction at TRISD1_bit;
sbit LCD_D6_Direction at TRISD2_bit;
sbit LCD_D7_Direction at TRISD3_bit;
// End LCD module connections
float volt1=0X00;
float volt2=0X00;
char voltage[4];

void initialisation(){
     lcd_init();
     lcd_cmd(_lcd_clear);
     lcd_cmd(_lcd_cursor_off);
     lcd_out(1,1,"La Tension");
     adc_init();
     portd=0X00;
     porta=0X00;
     trisa=0xFF;
     trisd=0X00;
}

void main() {
 initialisation();
 while(1){
   volt1=adc_read(0);
   volt2=adc_read(1);
   volt1-=volt2;
   volt1*=0.00489;
   floattostr(volt1,voltage);
   lcd_out(2,1,voltage);
 }

}
le circuit

 

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