La page contient la synthèse (pas toutes) des fonctions utilisées dans les projets. La page sera mis à jour de temps en temps. Les fonctions récentes seront intégrées à la fin de la page. Vous pouvez consulter la page si vous avez des difficultés à trouver une fonction dans le code fournit du projet ou effectuer une recherche par mot clés dans le blog.

 

Onduleur triphasé

void SetCMD1( int *pins)
{
static int I=0;
const bool Cmd[6][6]={{0,1,1,0,0,1},
{1,0,1,0,0,1},
{1,0,0,1,0,1},
{1,0,0,1,1,0},
{0,1,0,1,1,0},
{0,1,1,0,1,0}};

for (int i=0;i<6; i++) digitalWrite(pins[i], Cmd[I][i]);
I++; I%=6;

return 0;
}
void SetCMD2( int *pins)
{
static unsigned char I=0;
const unsigned char Cmd[6]={B00011001,
B00101001,
B00100101,
B00100110,
B00010110,
B00011010};

PORTA=Cmd[I];
I++;

//I%=6; // Fréquence: +
//I=I*(I<6); // Fréquence: ++
if (I>=6)I=0; // Fréquence: +++

return 0;
}
void SetCMD3( int *pins)
{
static unsigned char I=0;
const bool Cmd[12][6]={
{0,1,1,0,0,0},
{0,0,1,0,0,1},
{0,0,1,0,0,1},
{1,0,0,0,0,1},
{1,0,0,0,0,1},
{1,0,0,1,0,0},
{1,0,0,1,0,0},
{0,0,0,1,1,0},
{0,0,0,1,1,0},
{0,1,0,0,1,0},
{0,1,0,0,1,0},
{0,1,1,0,0,0},
};

for (int i=0;i<6; i++) digitalWrite(pins[i], Cmd[I][i]);
I++;
if (I>=12)I=0;

return 0;
}
void SetCMD4( int *pins)
{
static unsigned char I=0;
const unsigned char Cmd[12]= {
B00011000,
B00001001,
B00001001,
B00100001,
B00100001,
B00100100,
B00100100,
B00000110,
B00000110,
B00010010,
B00010010,
B00011000
};

PORTA=Cmd[I];
I++;
if (I>=12)I=0;

return 0;
}

Analyse fréquentielle

float DFT(float *data, int Ndata, float *real, float *imag, float fs)
{
int nfft=floor((float)Ndata/2.0);
float df=(fs/2.0)/(float)nfft;
float somme_r=0.0, somme_i=0.0;
float wt=0.0;

for (int i=0; i<nfft; i++)
{
for (int j=0; j<Ndata; j++)
{
wt=-2.0*PI*(float)i*(float)j/Ndata;
somme_r+=data[j]*cos(wt);
somme_i+=data[j]*sin(wt);
}
real[i]= somme_r; somme_r=0.0;
imag[i]= somme_i; somme_i=0.0;
}
return df;
}
float DFTn(float *data, int Ndata, float *realImag, int n, float fs)
{
int nfft=floor((float)Ndata/2.0);
float df=(fs/2.0)/(float)nfft;
float somme_r=0.0, somme_i=0.0;
float wt=0.0;

if (n>=nfft) return 0.0;

int i=n;
for (int j=0; j<Ndata; j++)
{
wt=-2.0*PI*(float)i*(float)j/(float)Ndata;
somme_r+=data[j]*cos(wt);
somme_i+=data[j]*sin(wt);
}
realImag[0]= somme_r;
realImag[1]= somme_i;
return df;
}
float getFreqHz(int Ai, int s_max, int s_min)
{
static long T_2=0, T_1=0;
static int ai_1=0, ai_2=0;
static float freq=0.0;

ai_1=analogRead(54+Ai);
if((ai_2-ai_1)>s_max)
{
T_2=micros()-T_1;
freq=1.0/((float)T_2*1E-6);
T_1=micros();
}
ai_2=ai_1;
return freq;
}
float setWindow(float *datain, float *dataout, int n, int type)
{
float Hi, t=0.0,t0=0.0, sig=0.0;
const float gain[6]={0.5581,0.5934,0.4765,0.6456,0.5581,1.0000};

switch(type)
{
//Fenêtre de Hann
case 0:
for(int i=0;i<n; i++)
{
t=(float)i/float(n);
Hi=0.5-0.5*cos(2.0*PI*t);
dataout[i]=Hi*datain[i];
}
return gain[type];

//Fenêtre de Hamming
case 1:
for(int i=0;i<n; i++)
{
t=(float)i/float(n);
Hi=0.54-0.46*cos(2.0*PI*t);
dataout[i]=Hi*datain[i];
}
return gain[type];

// Fenêtre de Blackman
case 2:
for(int i=0;i<n; i++)
{
t=(float)i/float(n);
Hi=0.42-0.5*cos(2.0*PI*t)+0.08*cos(4.0*PI*t);
dataout[i]=Hi*datain[i];
}
return gain[type];

//Fenêtre de Gauss
case 3:
for(int i=0;i<n; i++)
{
t=((float)i/float(n))-0.5;
t0=0.5;
sig=t0/2.0;
Hi=exp(-0.5*t*t/(sig*sig));
dataout[i]=Hi*datain[i];
}
return gain[type];

//Fenêtre sin²
case 4:
for(int i=0;i<n; i++)
{
t=(float)i/float(n);
Hi=sin(2.0*0.5*PI*t)*sin(2.0*0.5*PI*t); // sin(x)²=(1-cos(2x))/2
dataout[i]=Hi*datain[i];
}
return gain[type];

default:
for(int i=0;i<n; i++)
{
dataout[i]=datain[i];
}
return gain[5];
}
}

Diverses

void getMax(float *datain, int n, float *maxid)
{
float maxe=datain[0];
float id=0;

for (int i=1;i<n; i++)
{
if (datain[i]>=maxe)
{
maxe=datain[i];
id=i;
}
}
maxid[0]=maxe;
maxid[1]=id;
}
double rand10(void)
{
double rn1=2.0*((random(1e10)/1e10)-0.5);
double rn2=2.0*((random(1e10)/1e10)-0.5);
double rn=tanh((rn1-rn2));

return rn;
}
float getData(float *dataout,int nn, unsigned long ts_us, int analogpin, float gain, int noDC)
{
// Lecture des données brutes
float ts_f=0.0;
unsigned long t11;
for(int i=0; i<nn; i++)
{
t11=micros();
dataout[i]=(float)analogRead(54+analogpin);
delayMicroseconds(ts_us);
ts_f+=(float)micros()-(float)t11;
}
ts_f=ts_f/(float)nn;

// Conversion en V
for(int i=0; i<nn; i++)
dataout[i]=gain*dataout[i]*3.3/4095.0;

// Suppression de la valeur DC
if(noDC==0)
{
float Vm=0.0;
for(int i=0; i<nn;i++) Vm+=dataout[i];
Vm/=(float)nn;
for(int i=0; i<nn;i++) dataout[i]=dataout[i]-Vm;
}
return 1E6/ts_f;
}
Retour en haut

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