Arduino: test

testAd8302.ino

//  Created by Jack Dev on 10/10/13.
//
//

/*
 AnalogReadSerial
 Reads an analog input on pin 0, prints the result to the serial monitor.
 Attach the center pin of a potentiometer to pin A0, and the outside pins to +5V and ground.
 
 This example code is in the public domain.
 */

#include <AH_AD9850.h>

//CLK - D6, FQUP - D7,  BitData - D8, RESET - D9
//AH_AD9850(int CLK, int FQUP, int BitData, int RESET);
AH_AD9850 AD9850(5, 6, 7, 4);
double freqStart;

//adc variables
float Adcphase;
float Adcmagnitude;

//swr etc. variables
float Returnloss;
float Angle ;
float Mag ;
float F ;
float G ;
float Rr ;
float Ss ;
float Ximp ;
float Rimp ;

float Zimpl ;                                         //Offset Z0

float Zimp ;
float Swr ;
float Rrsqrtmp ;
float Sssqrtmp ;
float Tmpsa ;
float Tmpsb ;
float Tmpsc ;

//from radians to degrees
const float R2d = 57.296;

//Standard characteristic impedance
const float Z0 = 51.1;

byte SWR[84];
double lastFreq ;
float minSwr;
float maxSwr;
void Docalcswr(){
    float Tmpsa ;
    float Tmpsb ;
    float Tmpsc ;
    float refer = 5.0*analogRead(A1)/1023;
    Adcphase = 5.0*analogRead(A2)/1023;
    Adcmagnitude = 5.0*analogRead(A0)/1023;
    Returnloss = (60.0 * (Adcmagnitude - (refer/2)) /refer);
    Returnloss = 19.0 - Returnloss - 2.7;
    Angle =  (180.0 * Adcphase /refer);

    Tmpsa = Returnloss / 20.0;
    Tmpsb = 10.0;
    Mag = pow(Tmpsb , Tmpsa);
    Mag = 1.0 / Mag;
    Tmpsa = 1.0 + Mag;
    Tmpsb = 1.0 - Mag;
    Tmpsc = Tmpsa / Tmpsb;
    Swr = abs(Tmpsc);
}

void Docalcall(){

    Docalcswr();
    float Tmpsa ;
    float Tmpsb ;
    float Tmpsc ;
    float Rrsqrtmp ;
    float Sssqrtmp ;
    float F ;
    float G ;
    float Rr ;
    float Ss ;

    Tmpsa = Angle / R2d;
    F = cos(Tmpsa);
    G = sin(Tmpsa);
    Rr = F * Mag;
    Ss = G * Mag;
    Tmpsa = 1.0 - Rr;
    Rrsqrtmp = Tmpsa * Tmpsa;
    Sssqrtmp = Ss * Ss;
    Tmpsa = Rrsqrtmp + Sssqrtmp;
    Tmpsb = 2.0 * Ss;
    Tmpsc = Tmpsb / Tmpsa;
    Tmpsa = Tmpsc * Z0;
    Ximp = abs(Tmpsa);

    Tmpsa = Rr * Rr;
    Tmpsb = 1.0 - Tmpsa;
    Tmpsa = Tmpsb - Sssqrtmp;
    Tmpsb = Rrsqrtmp + Sssqrtmp;
    Tmpsc = Tmpsa / Tmpsb;
    Tmpsa = Tmpsc * Z0;
    Rimp = abs(Tmpsa);

    Tmpsa = Rimp * Rimp;
    Tmpsb = Ximp * Ximp;
    Tmpsc = Tmpsa + Tmpsb;

    Zimpl = sqrt(Tmpsc);
}
void sweep(double f){
    
    double freq;
    for (int k = 0;k < 84; k++){
        freq = f + 8*k*1000.0;
        AD9850.set_frequency(freq);        //set 2.5kHz frequency
        delay(10);
        Docalcall();
       Serial.print ("    refer:    ");
        // Serial.print (refer,3);        
       Serial.print ("    freq:    ");
        Serial.print (freq,0);
        Serial.print ("   Angle:    ");
        Serial.print(Angle);
        Serial.print ("   Returnloss:    ");
        Serial.print(Returnloss);
        Serial.print ("   Rimp:    ");
        Serial.print(Rimp);
        Serial.print ("   Ximp:    ");
        Serial.print(Ximp);
                Serial.print ("   Zimpl:    ");
        Serial.print(Zimpl);
        Serial.print ("   Swr:    ");
        Serial.println(Swr);
        if (Swr < 1.1) Swr = 1.1;
        if (Swr > 3.0) Swr = 3.0;
        //  SWR[k] =  46 -(8*Swr);  //MAX SWR = 5.6
        SWR[k] =  54 -(18*Swr);  //MAX SWR = 3.0
        
        if (minSwr > Swr) minSwr = Swr;
        if (maxSwr < Swr) maxSwr = Swr;
        /* Serial.print(freq);
         Serial.print ("    ");
         Serial.println(Swr);*/
    }
    lastFreq = freq;
}

// the setup routine runs once when you press reset:
void setup() {
        Serial.begin(9600);

    AD9850.reset();                   //reset module
    delay(1000);
    AD9850.powerDown();               //set signal output to LOW
    // initialize serial communication at 9600 bits per second:

    freqStart = 7000000.0;
    AD9850.set_frequency(0,0,freqStart);
}

// the loop routine runs over and over again forever:
void loop() {
    sweep(freqStart);

}