Charlie Morris, ZL2CTM

Friday, 21 June 2019

Homebrew 80/40/20m SSB SDR Phasing Rig

Please see my YouTube channel for accompanying/explanation videos.

https://www.youtube.com/channel/UCSNPW3_gzuMJcX_ErBZTv2g

Antenna RF amplifer

Final configuration

Test Software for Phasing technique.

// Libraries

#include <Wire.h> // I2C comms library

#include <si5351.h> // Si5351Jason library

#include "ILI9341_t3.h"

#include <Audio.h> // Teensy audio library

#define NO_HILBERT_COEFFS 100 // Used to define the Hilbert transform filter arrays. More typical than 'const int'.

// Define Constants and Vaviables

static const long bandStart = 1000000; // start of HF band

static const long bandEnd = 30000000; // end of HF band

static const long bandInit = 3690000; // where to initially set the frequency

volatile long oldfreq = 0;

volatile long freq = bandInit ;

volatile long radix = 1000; // how much to change the frequency. Pushing the rotary encoder switch will change this.

volatile long oldradix = 1;

volatile int updatedisplay = 0;

volatile int mode = 1; // 1 = LSB, 0 = USB

volatile int oldmode = 0;

volatile int Even_Divisor = 0;

volatile int oldEven_Divisor = 0;

// Audio panel gains

static const int Linein_Gain = 10; // Range is 0-15. 0 = 3.12 Vp-p, 15 = 0.24 Vp-p. Default = 5

// Rotary Encoder

static const int EncoderPushButton = 39;

static const int rotBPin = 36;

static const int rotAPin = 35;

static const int ModeSwitch = 24;

static const int PTTSwitch = 25;

volatile int rotState = 0;

volatile int rotAval = 1;

volatile int rotBval = 1;

volatile int rotAcc = 0;

// For optimized ILI9341_t3 library

#define TFT_DC 20

#define TFT_CS 21

#define TFT_RST 255 // 255 = unused, connect to 3.3V

#define TFT_MOSI 7

#define TFT_SCLK 14

#define TFT_MISO 12

// Iowa Hills Hilbert transform filter coefficients

const short Hilbert_Plus_45_Coeffs[NO_HILBERT_COEFFS] = {

(short)(32768 * 483.9743406915770E-9),

(short)(32768 * 1.866685817417670E-6),

(short)(32768 * 4.392570072495770E-6),

(short)(32768 * 8.820636712774380E-6),

(short)(32768 * 0.000016184764415848),

(short)(32768 * 0.000027249288101724),

(short)(32768 * 0.000041920439805110),

(short)(32768 * 0.000059016345361008),

(short)(32768 * 0.000076756191268614),

(short)(32768 * 0.000094055071776657),

(short)(32768 * 0.000112261583662573),

(short)(32768 * 0.000136518354793722),

(short)(32768 * 0.000175696544399550),

(short)(32768 * 0.000240067250940666),

(short)(32768 * 0.000336609833081347),

(short)(32768 * 0.000462990951098187),

(short)(32768 * 0.000602421399161912),

(short)(32768 * 0.000722301614841713),

(short)(32768 * 0.000779305755125654),

(short)(32768 * 0.000732056920489209),

(short)(32768 * 0.000559948250896998),

(short)(32768 * 0.000283585816755988),

(short)(32768 * -0.000020215761694049),

(short)(32768 * -0.000216819118897174),

(short)(32768 * -0.000131758715732279),

(short)(32768 * 0.000409948902196685),

(short)(32768 * 0.001528130963104050),

(short)(32768 * 0.003227564604759798),

(short)(32768 * 0.005351504118228274),

(short)(32768 * 0.007567804706902511),

(short)(32768 * 0.009402820162611196),

(short)(32768 * 0.010328512135999630),

(short)(32768 * 0.009894246835039863),

(short)(32768 * 0.007879714166593881),

(short)(32768 * 0.004433421126740721),

(short)(32768 * 0.000156366633965185),

(short)(32768 * -0.003904389468521576),

(short)(32768 * -0.006371988171406650),

(short)(32768 * -0.005761887634323113),

(short)(32768 * -0.000778938771957753),

(short)(32768 * 0.009365085367419172),

(short)(32768 * 0.024681757404317366),

(short)(32768 * 0.044251382160327521),

(short)(32768 * 0.066233642104189930),

(short)(32768 * 0.088062621169129954),

(short)(32768 * 0.106806616459214951),

(short)(32768 * 0.119635362035632908),

(short)(32768 * 0.124309482163432433),

(short)(32768 * 0.119596382589365807),

(short)(32768 * 0.105526834497225247),

(short)(32768 * 0.083435851600156402),

(short)(32768 * 0.055774084237545388),

(short)(32768 * 0.025722508803868269),

(short)(32768 * -0.003316774367731974),

(short)(32768 * -0.028256325810852603),

(short)(32768 * -0.046784860848984686),

(short)(32768 * -0.057671422122216751),

(short)(32768 * -0.060863961385426720),

(short)(32768 * -0.057377469068775784),

(short)(32768 * -0.049008885222883866),

(short)(32768 * -0.037947605693328487),

(short)(32768 * -0.026365178611104038),

(short)(32768 * -0.016063741251826878),

(short)(32768 * -0.008242320709669780),

(short)(32768 * -0.003409329314875374),

(short)(32768 * -0.001436295024424050),

(short)(32768 * -0.001719754923178513),

(short)(32768 * -0.003400970055132929),

(short)(32768 * -0.005589187214751837),

(short)(32768 * -0.007542651980327935),

(short)(32768 * -0.008778747041127889),

(short)(32768 * -0.009105231860961261),

(short)(32768 * -0.008583286966676333),

(short)(32768 * -0.007445876442758468),

(short)(32768 * -0.005999873442098177),

(short)(32768 * -0.004537732597630097),

(short)(32768 * -0.003276341625911221),

(short)(32768 * -0.002330120643710241),

(short)(32768 * -0.001715559019593159),

(short)(32768 * -0.001377498498508186),

(short)(32768 * -0.001224659509681699),

(short)(32768 * -0.001162953813794283),

(short)(32768 * -0.001118850197066992),

(short)(32768 * -0.001049829425495061),

(short)(32768 * -0.000943240226180188),

(short)(32768 * -0.000807608474652057),

(short)(32768 * -0.000661296218869203),

(short)(32768 * -0.000522622836450865),

(short)(32768 * -0.000403818527830429),

(short)(32768 * -0.000309261220275339),

(short)(32768 * -0.000236981246010256),

(short)(32768 * -0.000181726899678497),

(short)(32768 * -0.000137960767232952),

(short)(32768 * -0.000101749677323657),

(short)(32768 * -0.000071268112804006),

(short)(32768 * -0.000046246069278189),

(short)(32768 * -0.000026984224473470),

(short)(32768 * -0.000013519855860183),

(short)(32768 * -5.268419079329310E-6),

(short)(32768 * -1.152120275972750E-6)

};

// Iowa Hills Hilbert transform filter coefficients

const short Hilbert_Minus_45_Coeffs[NO_HILBERT_COEFFS] = {

(short)(32768 * -1.152120275972720E-6),

(short)(32768 * -5.268419079329100E-6),

(short)(32768 * -0.000013519855860182),

(short)(32768 * -0.000026984224473469),

(short)(32768 * -0.000046246069278187),

(short)(32768 * -0.000071268112804004),

(short)(32768 * -0.000101749677323656),

(short)(32768 * -0.000137960767232950),

(short)(32768 * -0.000181726899678496),

(short)(32768 * -0.000236981246010254),

(short)(32768 * -0.000309261220275334),

(short)(32768 * -0.000403818527830420),

(short)(32768 * -0.000522622836450852),

(short)(32768 * -0.000661296218869189),

(short)(32768 * -0.000807608474652046),

(short)(32768 * -0.000943240226180185),

(short)(32768 * -0.001049829425495072),

(short)(32768 * -0.001118850197067017),

(short)(32768 * -0.001162953813794315),

(short)(32768 * -0.001224659509681719),

(short)(32768 * -0.001377498498508169),

(short)(32768 * -0.001715559019593075),

(short)(32768 * -0.002330120643710066),

(short)(32768 * -0.003276341625910951),

(short)(32768 * -0.004537732597629757),

(short)(32768 * -0.005999873442097817),

(short)(32768 * -0.007445876442758181),

(short)(32768 * -0.008583286966676212),

(short)(32768 * -0.009105231860961396),

(short)(32768 * -0.008778747041128323),

(short)(32768 * -0.007542651980328638),

(short)(32768 * -0.005589187214752684),

(short)(32768 * -0.003400970055133710),

(short)(32768 * -0.001719754923178943),

(short)(32768 * -0.001436295024423829),

(short)(32768 * -0.003409329314874256),

(short)(32768 * -0.008242320709667652),

(short)(32768 * -0.016063741251823811),

(short)(32768 * -0.026365178611100354),

(short)(32768 * -0.037947605693324706),

(short)(32768 * -0.049008885222880681),

(short)(32768 * -0.057377469068773987),

(short)(32768 * -0.060863961385426962),

(short)(32768 * -0.057671422122219533),

(short)(32768 * -0.046784860848990188),

(short)(32768 * -0.028256325810860565),

(short)(32768 * -0.003316774367741772),

(short)(32768 * 0.025722508803857579),

(short)(32768 * 0.055774084237534945),

(short)(32768 * 0.083435851600147395),

(short)(32768 * 0.105526834497218600),

(short)(32768 * 0.119596382589362227),

(short)(32768 * 0.124309482163432142),

(short)(32768 * 0.119635362035635753),

(short)(32768 * 0.106806616459220294),

(short)(32768 * 0.088062621169136893),

(short)(32768 * 0.066233642104197507),

(short)(32768 * 0.044251382160334737),

(short)(32768 * 0.024681757404323448),

(short)(32768 * 0.009365085367423625),

(short)(32768 * -0.000778938771955104),

(short)(32768 * -0.005761887634322139),

(short)(32768 * -0.006371988171407000),

(short)(32768 * -0.003904389468522771),

(short)(32768 * 0.000156366633963640),

(short)(32768 * 0.004433421126739255),

(short)(32768 * 0.007879714166592786),

(short)(32768 * 0.009894246835039278),

(short)(32768 * 0.010328512135999562),

(short)(32768 * 0.009402820162611529),

(short)(32768 * 0.007567804706903086),

(short)(32768 * 0.005351504118228925),

(short)(32768 * 0.003227564604760380),

(short)(32768 * 0.001528130963104480),

(short)(32768 * 0.000409948902196933),

(short)(32768 * -0.000131758715732195),

(short)(32768 * -0.000216819118897210),

(short)(32768 * -0.000020215761694147),

(short)(32768 * 0.000283585816755878),

(short)(32768 * 0.000559948250896909),

(short)(32768 * 0.000732056920489157),

(short)(32768 * 0.000779305755125639),

(short)(32768 * 0.000722301614841724),

(short)(32768 * 0.000602421399161936),

(short)(32768 * 0.000462990951098213),

(short)(32768 * 0.000336609833081367),

(short)(32768 * 0.000240067250940678),

(short)(32768 * 0.000175696544399555),

(short)(32768 * 0.000136518354793723),

(short)(32768 * 0.000112261583662573),

(short)(32768 * 0.000094055071776658),

(short)(32768 * 0.000076756191268616),

(short)(32768 * 0.000059016345361010),

(short)(32768 * 0.000041920439805112),

(short)(32768 * 0.000027249288101726),

(short)(32768 * 0.000016184764415849),

(short)(32768 * 8.820636712774440E-6),

(short)(32768 * 4.392570072495580E-6),

(short)(32768 * 1.866685817417500E-6),

(short)(32768 * 483.9743406915230E-9)

};

// Instantiate the Objects

ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);

Si5351 si5351; // Name for the Si5351 DDS

AudioControlSGTL5000 audioShield; // Name for the Teensy audio CODEC on the audio shield

// Audio shield

AudioInputI2S audioInput; // Name for the input to the audio shield (either line-in or mic)

AudioOutputI2S audioOutput; // Name for the output of the audio shield (either headphones or line-out)

// Receiver

AudioFilterFIR RX_Hilbert_Plus_45; // Name for the RX +45 Hilbert transform

AudioFilterFIR RX_Hilbert_Minus_45; // Name for the RX +45 Hilbert transform

AudioMixer4 RX_Summer; // Name for the RX summer

// Audio connections

AudioConnection patchCord5(audioInput, 0, RX_Hilbert_Plus_45, 0); // Left channel in Hilbert transform +45

AudioConnection patchCord10(audioInput, 1, RX_Hilbert_Minus_45, 0); // Right channel in Hilbert transform -45

AudioConnection patchCord15(RX_Hilbert_Plus_45, 0, RX_Summer, 0); // Hilbert transform +45 to receiver summer

AudioConnection patchCord20(RX_Hilbert_Minus_45, 0, RX_Summer, 1); // Hilbert transform -45 to receiver summer

AudioConnection patchCord25(RX_Summer, 0, audioOutput, 0);

AudioConnection patchCord30(RX_Summer, 0, audioOutput, 1);

void setup()

{

// Setup screen

tft.begin();

tft.setRotation(1);

tft.fillScreen(ILI9341_BLACK);

tft.drawRect(31, 0, 257, 37, ILI9341_YELLOW);

tft.drawRect(31, 36, 257, 103, ILI9341_YELLOW);

tft.drawRect(31, 138, 257, 102, ILI9341_YELLOW);

// Setup input switches

pinMode(rotAPin, INPUT);

pinMode(rotBPin, INPUT);

pinMode(EncoderPushButton, INPUT);

pinMode(ModeSwitch, INPUT);

digitalWrite(rotAPin, HIGH);

digitalWrite(rotBPin, HIGH);

digitalWrite(EncoderPushButton, HIGH);

digitalWrite(ModeSwitch, HIGH);

// Setup interrupt pins

attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);

attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);

// Initialize the DDS

si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0); // 25MHz crystal = 0, 27MHz crystal = 27000000

si5351.set_correction(62799, SI5351_PLL_INPUT_XO); // Set to specific Si5351 calibration number

si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_6MA);

si5351.drive_strength(SI5351_CLK1, SI5351_DRIVE_6MA);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

si5351.pll_reset(SI5351_PLLA);

// Setup the audio shield

AudioNoInterrupts();

AudioMemory(12);

audioShield.enable();

AudioInterrupts();

// Setup transceiver mode

Turn_On_Receiver();

UpdateDisplay();

}

void loop()

{

if (freq != oldfreq) // Check to see if the frequency has changed. If so, update everything.

{

EvenDivisor();

UpdateDisplay();

SendFrequency();

oldfreq = freq;

}

if (digitalRead(EncoderPushButton) == LOW) // Update cursor, but also stop it from flickering

{

delay(50);

while (digitalRead(EncoderPushButton) == LOW)

{

if (updatedisplay == 1)

{

UpdateDisplay();

updatedisplay = 0;

}

delay(50);

}

void Turn_On_Receiver()

{

AudioNoInterrupts();

audioShield.inputSelect(AUDIO_INPUT_LINEIN);

audioShield.lineInLevel(Linein_Gain);

audioShield.unmuteHeadphone(); // Output to the audio amplifier

audioShield.volume(0.7);

RX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NO_HILBERT_COEFFS);

RX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NO_HILBERT_COEFFS);

RX_Summer.gain(0, 1);

RX_Summer.gain(1, -1);

AudioInterrupts();

}

// Interrupt routines

void ISRrotAChange()

{

if (digitalRead(rotAPin))

{

rotAval = 1;

UpdateRot();

}

else

{

rotAval = 0;

UpdateRot();

}

void ISRrotBChange()

{

if (digitalRead(rotBPin))

{

rotBval = 1;

UpdateRot();

}

else

{

rotBval = 0;

UpdateRot();

}

void UpdateRot()

{

switch (rotState)

{

case 0: // Idle state, look for direction

if (!rotBval)

rotState = 1; // CW 1

if (!rotAval)

rotState = 11; // CCW 1

break;

case 1: // CW, wait for A low while B is low

if (!rotBval)

{

if (!rotAval)

{

// either increment radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

updatedisplay = 1;

if (radix == 1000000)

radix = 100000;

else if (radix == 100000)

radix = 10000;

else if (radix == 10000)

radix = 1000;

else if (radix == 1000)

radix = 100;

else if (radix == 100)

radix = 10;

else if (radix == 10)

radix = 1;

else

radix = 1000000;

}

else

{

freq = (freq + radix);

if (freq > bandEnd)

freq = bandEnd;

}

rotState = 2; // CW 2

}

else if (rotAval)

rotState = 0; // It was just a glitch on B, go back to start

break;

case 2: // CW, wait for B high

if (rotBval)

rotState = 3; // CW 3

break;

case 3: // CW, wait for A high

if (rotAval)

rotState = 0; // back to idle (detent) state

break;

case 11: // CCW, wait for B low while A is low

if (!rotAval)

{

if (!rotBval)

{

// either decrement radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

updatedisplay = 1;

if (radix == 1)

radix = 10;

else if (radix == 10)

radix = 100;

else if (radix == 100)

radix = 1000;

else if (radix == 1000)

radix = 10000;

else if (radix == 10000)

radix = 100000;

else if (radix == 100000)

radix = 1000000;

else

radix = 1;

}

else

{

freq = (freq - radix);

if (freq < bandStart)

freq = bandStart;

}

rotState = 12; // CCW 2

}

else if (rotBval)

rotState = 0; // It was just a glitch on A, go back to start

break;

case 12: // CCW, wait for A high

if (rotAval)

rotState = 13; // CCW 3

break;

case 13: // CCW, wait for B high

if (rotBval)

rotState = 0; // back to idle (detent) state

break;

}

void UpdateDisplay()

{

tft.setTextSize(2);

tft.setCursor(50, 10);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldfreq);

tft.setCursor(50, 10);

tft.setTextColor(ILI9341_WHITE);

tft.println(freq);

if (radix != oldradix) // stops radix display flashing/blinking on freq change

{

tft.setCursor(170, 10);

tft.setTextColor(ILI9341_BLACK);

if (oldradix == 1)

tft.print(" 1 Hz");

if (oldradix == 10)

tft.print(" 10 Hz");

if (oldradix == 100)

tft.print(" 100 Hz");

if (oldradix == 1000)

tft.print(" 1 kHz");

if (oldradix == 10000)

tft.print(" 10 kHz");

if (oldradix == 100000)

tft.print("100 kHz");

if (oldradix == 1000000)

tft.print(" 1 MHz");

tft.setCursor(170, 10);

tft.setTextColor(ILI9341_WHITE);

if (radix == 1)

tft.print(" 1 Hz");

if (radix == 10)

tft.print(" 10 Hz");

if (radix == 100)

tft.print(" 100 Hz");

if (radix == 1000)

tft.print(" 1 kHz");

if (radix == 10000)

tft.print(" 10 kHz");

if (radix == 100000)

tft.print("100 kHz");

if (radix == 1000000)

tft.print(" 1 MHz");

oldradix = radix;

}

void EvenDivisor()

{

if (freq < 6850000)

{

Even_Divisor = 126;

}

if ((freq >= 6850000) && (freq < 9500000))

{

Even_Divisor = 88;

}

if ((freq >= 9500000) && (freq < 13600000))

{

Even_Divisor = 64;

}

if ((freq >= 13600000) && (freq < 17500000))

{

Even_Divisor = 44;

}

if ((freq >= 17500000) && (freq < 25000000))

{

Even_Divisor = 34;

}

if ((freq >= 25000000) && (freq < 36000000))

{

Even_Divisor = 24;

}

if ((freq >= 36000000) && (freq < 45000000)) {

Even_Divisor = 18;

}

if ((freq >= 45000000) && (freq < 60000000)) {

Even_Divisor = 14;

}

if ((freq >= 60000000) && (freq < 80000000)) {

Even_Divisor = 10;

}

if ((freq >= 80000000) && (freq < 100000000)) {

Even_Divisor = 8;

}

if ((freq >= 100000000) && (freq < 146600000)) {

Even_Divisor = 6;

}

if ((freq >= 150000000) && (freq < 220000000)) {

Even_Divisor = 4;

}

void SendFrequency()

{

//freq = freq + 10;

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

if (Even_Divisor != oldEven_Divisor)

{

si5351.pll_reset(SI5351_PLLA);

oldEven_Divisor = Even_Divisor;

}

***********************************************

Test software for Weaver technique.

// Libraries

#include <Wire.h> // I2C comms library

#include <si5351.h> // Si5351Jason library

#include "ILI9341_t3.h"

#include <Audio.h> // Teensy audio library

#define NO_LPF_COEFFS 100 // Used to define the Hilbert transform filter arrays. More typical than 'const int'.

int Osc_freq = 1350;

// Define Constants and Vaviables

static const long bandStart = 1000000; // start of HF band

static const long bandEnd = 30000000; // end of HF band

static const long bandInit = 3690000 - 1350; // where to initially set the frequency

volatile long oldfreq = 0;

volatile long freq = bandInit;

volatile long dispfreq = 0;

volatile long olddispfreq = 0;

volatile long radix = 1000; // how much to change the frequency. Pushing the rotary encoder switch will change this.

volatile long oldradix = 1;

volatile int updatedisplay = 0;

volatile int mode = 1; // 1 = LSB, 0 = USB

volatile int oldmode = 0;

volatile int Even_Divisor = 0;

volatile int oldEven_Divisor = 0;

// Audio panel gains

static const int Linein_Gain = 10; // Range is 0-15. 0 = 3.12 Vp-p, 15 = 0.24 Vp-p. Default = 5

// Rotary Encoder

static const int EncoderPushButton = 39;

static const int rotBPin = 36;

static const int rotAPin = 35;

static const int ModeSwitch = 24;

static const int PTTSwitch = 25;

volatile int rotState = 0;

volatile int rotAval = 1;

volatile int rotBval = 1;

volatile int rotAcc = 0;

// For optimized ILI9341_t3 library

#define TFT_DC 20

#define TFT_CS 21

#define TFT_RST 255 // 255 = unused, connect to 3.3V

#define TFT_MOSI 7

#define TFT_SCLK 14

#define TFT_MISO 12

// Iowa Hills LPF filter coefficients

const short LPF_Coeffs[NO_LPF_COEFFS] = {

(short)(32768 * 306.4951185627353420E-9),

(short)(32768 * 2.389304478278580830E-6),

(short)(32768 * 7.113585052311595550E-6),

(short)(32768 * 14.72828307076125930E-6),

(short)(32768 * 24.58848420405347920E-6),

(short)(32768 * 35.02666821312011080E-6),

(short)(32768 * 43.43839783397800150E-6),

(short)(32768 * 46.61576513715636590E-6),

(short)(32768 * 41.31600135178678100E-6),

(short)(32768 * 24.99939715244948960E-6),

(short)(32768 * -3.381010660280591830E-6),

(short)(32768 * -42.69541258485239870E-6),

(short)(32768 * -89.23441801688076680E-6),

(short)(32768 * -136.7515827038860440E-6),

(short)(32768 * -177.0704045420265800E-6),

(short)(32768 * -201.2975885521037750E-6),

(short)(32768 * -201.5817136692013490E-6),

(short)(32768 * -173.2410096718713530E-6),

(short)(32768 * -116.9727242504059600E-6),

(short)(32768 * -40.76876611355810100E-6),

(short)(32768 * 38.88327362518843700E-6),

(short)(32768 * 96.92273299774292640E-6),

(short)(32768 * 101.0929496871475240E-6),

(short)(32768 * 14.95903728424654490E-6),

(short)(32768 * -197.4484620824715080E-6),

(short)(32768 * -565.6166584117947880E-6),

(short)(32768 * -0.001105659124309112),

(short)(32768 * -0.001813271033445281),

(short)(32768 * -0.002657413489625704),

(short)(32768 * -0.003575681889777568),

(short)(32768 * -0.004472272286104596),

(short)(32768 * -0.005219295852277327),

(short)(32768 * -0.005661909790021988),

(short)(32768 * -0.005627354513012373),

(short)(32768 * -0.004937547773786580),

(short)(32768 * -0.003424434146231942),

(short)(32768 * -946.8768746362549110E-6),

(short)(32768 * 0.002592437620492790),

(short)(32768 * 0.007231787528579316),

(short)(32768 * 0.012938601156477677),

(short)(32768 * 0.019602556730010448),

(short)(32768 * 0.027034742068844295),

(short)(32768 * 0.034973496032183256),

(short)(32768 * 0.043096926615698458),

(short)(32768 * 0.051041434503589389),

(short)(32768 * 0.058424937851007025),

(short)(32768 * 0.064872965661608481),

(short)(32768 * 0.070045425749411874),

(short)(32768 * 0.073661704425816404),

(short)(32768 * 0.075521841389624714),

(short)(32768 * 0.073661704425816404),

(short)(32768 * 0.070045425749411874),

(short)(32768 * 0.064872965661608481),

(short)(32768 * 0.058424937851007025),

(short)(32768 * 0.051041434503589389),

(short)(32768 * 0.043096926615698458),

(short)(32768 * 0.034973496032183256),

(short)(32768 * 0.027034742068844295),

(short)(32768 * 0.019602556730010448),

(short)(32768 * 0.012938601156477677),

(short)(32768 * 0.007231787528579316),

(short)(32768 * 0.002592437620492790),

(short)(32768 * -946.8768746362549110E-6),

(short)(32768 * -0.003424434146231942),

(short)(32768 * -0.004937547773786580),

(short)(32768 * -0.005627354513012373),

(short)(32768 * -0.005661909790021988),

(short)(32768 * -0.005219295852277327),

(short)(32768 * -0.004472272286104596),

(short)(32768 * -0.003575681889777568),

(short)(32768 * -0.002657413489625704),

(short)(32768 * -0.001813271033445281),

(short)(32768 * -0.001105659124309112),

(short)(32768 * -565.6166584117947880E-6),

(short)(32768 * -197.4484620824715080E-6),

(short)(32768 * 14.95903728424654490E-6),

(short)(32768 * 101.0929496871475240E-6),

(short)(32768 * 96.92273299774292640E-6),

(short)(32768 * 38.88327362518843700E-6),

(short)(32768 * -40.76876611355810100E-6),

(short)(32768 * -116.9727242504059600E-6),

(short)(32768 * -173.2410096718713530E-6),

(short)(32768 * -201.5817136692013490E-6),

(short)(32768 * -201.2975885521037750E-6),

(short)(32768 * -177.0704045420265800E-6),

(short)(32768 * -136.7515827038860440E-6),

(short)(32768 * -89.23441801688076680E-6),

(short)(32768 * -42.69541258485239870E-6),

(short)(32768 * -3.381010660280591830E-6),

(short)(32768 * 24.99939715244948960E-6),

(short)(32768 * 41.31600135178678100E-6),

(short)(32768 * 46.61576513715636590E-6),

(short)(32768 * 43.43839783397800150E-6),

(short)(32768 * 35.02666821312011080E-6),

(short)(32768 * 24.58848420405347920E-6),

(short)(32768 * 14.72828307076125930E-6),

(short)(32768 * 7.113585052311595550E-6),

(short)(32768 * 2.389304478278580830E-6),

(short)(32768 * 306.4951185627353420E-9)

};

// Instantiate the Objects

ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);

Si5351 si5351; // Name for the Si5351 DDS

AudioControlSGTL5000 audioShield; // Name for the Teensy audio CODEC on the audio shield

// Audio shield

AudioInputI2S audioInput; // Name for the input to the audio shield (either line-in or mic)

AudioOutputI2S audioOutput; // Name for the output of the audio shield (either headphones or line-out)

// Receiver

AudioFilterFIR RX_I_LPF; // Name for the RX LPF

AudioFilterFIR RX_Q_LPF; // Name for the RX LPF

AudioEffectMultiply RX_I_Mixer;

AudioEffectMultiply RX_Q_Mixer;

AudioSynthWaveform RX_I_Osc;

AudioSynthWaveform RX_Q_Osc;

AudioMixer4 RX_Summer; // Name for the RX summer

//Audio connections

AudioConnection patchCord5(audioInput, 0, RX_I_LPF, 0);

AudioConnection patchCord10(audioInput, 1, RX_Q_LPF, 0);

AudioConnection patchCord15(RX_I_LPF, 0, RX_I_Mixer, 0);

AudioConnection patchCord20(RX_Q_LPF, 0, RX_Q_Mixer, 0);

AudioConnection patchCord25(RX_I_Osc, 0, RX_I_Mixer, 1); // Left channel in Hilbert transform +45

AudioConnection patchCord30(RX_Q_Osc, 0, RX_Q_Mixer, 1); // Right channel in Hilbert transform -45

AudioConnection patchCord35(RX_I_Mixer, 0, RX_Summer, 0); // Hilbert transform +45 to receiver summer

AudioConnection patchCord40(RX_Q_Mixer, 0, RX_Summer, 1); // Hilbert transform -45 to receiver summer

AudioConnection patchCord45(RX_Summer, 0, audioOutput, 0);

AudioConnection patchCord50(RX_Summer, 0, audioOutput, 1);

void setup()

{

// Setup screen

tft.begin();

tft.setRotation(1);

tft.fillScreen(ILI9341_BLACK);

tft.drawRect(31, 0, 257, 37, ILI9341_YELLOW);

tft.drawRect(31, 36, 257, 103, ILI9341_YELLOW);

tft.drawRect(31, 138, 257, 102, ILI9341_YELLOW);

// Setup input switches

pinMode(rotAPin, INPUT);

pinMode(rotBPin, INPUT);

pinMode(EncoderPushButton, INPUT);

pinMode(ModeSwitch, INPUT);

digitalWrite(rotAPin, HIGH);

digitalWrite(rotBPin, HIGH);

digitalWrite(EncoderPushButton, HIGH);

digitalWrite(ModeSwitch, HIGH);

// Setup interrupt pins

attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);

attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);

// Initialize the DDS

si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0); // 25MHz crystal = 0, 27MHz crystal = 27000000

si5351.set_correction(62799, SI5351_PLL_INPUT_XO); // Set to specific Si5351 calibration number

si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_6MA);

si5351.drive_strength(SI5351_CLK1, SI5351_DRIVE_6MA);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

si5351.pll_reset(SI5351_PLLA);

// Setup the audio shield

AudioNoInterrupts();

AudioMemory(16);

audioShield.enable();

AudioInterrupts();

// Setup transceiver mode

Turn_On_Receiver();

UpdateDisplay();

}

void loop()

{

if (freq != oldfreq) // Check to see if the frequency has changed. If so, update everything.

{

EvenDivisor();

SendFrequency();

UpdateDisplay();

oldfreq = freq;

}

if (digitalRead(EncoderPushButton) == LOW) // Update cursor, but also stop it from flickering

{

delay(50);

while (digitalRead(EncoderPushButton) == LOW)

{

if (updatedisplay == 1)

{

UpdateDisplay();

updatedisplay = 0;

}

delay(50);

}

void Turn_On_Receiver()

{

AudioNoInterrupts();

audioShield.inputSelect(AUDIO_INPUT_LINEIN);

audioShield.lineInLevel(Linein_Gain);

audioShield.unmuteHeadphone(); // Output to the audio amplifier

audioShield.volume(0.7);

RX_I_LPF.begin(LPF_Coeffs, NO_LPF_COEFFS);

RX_Q_LPF.begin(LPF_Coeffs, NO_LPF_COEFFS);

RX_I_Osc.frequency(Osc_freq);

RX_I_Osc.amplitude(1);

RX_I_Osc.phase(0);

RX_Q_Osc.frequency(Osc_freq);

RX_Q_Osc.amplitude(1);

RX_Q_Osc.phase(90);

RX_Summer.gain(0, 1);

RX_Summer.gain(1, -1);

AudioInterrupts();

}

// Interrupt routines

void ISRrotAChange()

{

if (digitalRead(rotAPin))

{

rotAval = 1;

UpdateRot();

}

else

{

rotAval = 0;

UpdateRot();

}

void ISRrotBChange()

{

if (digitalRead(rotBPin))

{

rotBval = 1;

UpdateRot();

}

else

{

rotBval = 0;

UpdateRot();

}

void UpdateRot()

{

switch (rotState)

{

case 0: // Idle state, look for direction

if (!rotBval)

rotState = 1; // CW 1

if (!rotAval)

rotState = 11; // CCW 1

break;

case 1: // CW, wait for A low while B is low

if (!rotBval)

{

if (!rotAval)

{

// either increment radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

updatedisplay = 1;

if (radix == 1000000)

radix = 100000;

else if (radix == 100000)

radix = 10000;

else if (radix == 10000)

radix = 1000;

else if (radix == 1000)

radix = 100;

else if (radix == 100)

radix = 10;

else if (radix == 10)

radix = 1;

else

radix = 1000000;

}

else

{

freq = (freq + radix);

if (freq > bandEnd)

freq = bandEnd;

}

rotState = 2; // CW 2

}

else if (rotAval)

rotState = 0; // It was just a glitch on B, go back to start

break;

case 2: // CW, wait for B high

if (rotBval)

rotState = 3; // CW 3

break;

case 3: // CW, wait for A high

if (rotAval)

rotState = 0; // back to idle (detent) state

break;

case 11: // CCW, wait for B low while A is low

if (!rotAval)

{

if (!rotBval)

{

// either decrement radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

updatedisplay = 1;

if (radix == 1)

radix = 10;

else if (radix == 10)

radix = 100;

else if (radix == 100)

radix = 1000;

else if (radix == 1000)

radix = 10000;

else if (radix == 10000)

radix = 100000;

else if (radix == 100000)

radix = 1000000;

else

radix = 1;

}

else

{

freq = (freq - radix);

if (freq < bandStart)

freq = bandStart;

}

rotState = 12; // CCW 2

}

else if (rotBval)

rotState = 0; // It was just a glitch on A, go back to start

break;

case 12: // CCW, wait for A high

if (rotAval)

rotState = 13; // CCW 3

break;

case 13: // CCW, wait for B high

if (rotBval)

rotState = 0; // back to idle (detent) state

break;

}

void UpdateDisplay()

{

dispfreq = freq + 1350;

tft.setTextSize(2);

tft.setCursor(50, 10);

tft.setTextColor(ILI9341_BLACK);

tft.println(olddispfreq);

tft.setCursor(50, 10);

tft.setTextColor(ILI9341_WHITE);

tft.println(dispfreq);

olddispfreq = dispfreq;

if (radix != oldradix) // stops radix display flashing/blinking on freq change

{

tft.setCursor(170, 10);

tft.setTextColor(ILI9341_BLACK);

if (oldradix == 1)

tft.print(" 1 Hz");

if (oldradix == 10)

tft.print(" 10 Hz");

if (oldradix == 100)

tft.print(" 100 Hz");

if (oldradix == 1000)

tft.print(" 1 kHz");

if (oldradix == 10000)

tft.print(" 10 kHz");

if (oldradix == 100000)

tft.print("100 kHz");

if (oldradix == 1000000)

tft.print(" 1 MHz");

tft.setCursor(170, 10);

tft.setTextColor(ILI9341_WHITE);

if (radix == 1)

tft.print(" 1 Hz");

if (radix == 10)

tft.print(" 10 Hz");

if (radix == 100)

tft.print(" 100 Hz");

if (radix == 1000)

tft.print(" 1 kHz");

if (radix == 10000)

tft.print(" 10 kHz");

if (radix == 100000)

tft.print("100 kHz");

if (radix == 1000000)

tft.print(" 1 MHz");

oldradix = radix;

}

void EvenDivisor()

{

if (freq < 6850000)

{

Even_Divisor = 126;

}

if ((freq >= 6850000) && (freq < 9500000))

{

Even_Divisor = 88;

}

if ((freq >= 9500000) && (freq < 13600000))

{

Even_Divisor = 64;

}

if ((freq >= 13600000) && (freq < 17500000))

{

Even_Divisor = 44;

}

if ((freq >= 17500000) && (freq < 25000000))

{

Even_Divisor = 34;

}

if ((freq >= 25000000) && (freq < 36000000))

{

Even_Divisor = 24;

}

if ((freq >= 36000000) && (freq < 45000000)) {

Even_Divisor = 18;

}

if ((freq >= 45000000) && (freq < 60000000)) {

Even_Divisor = 14;

}

if ((freq >= 60000000) && (freq < 80000000)) {

Even_Divisor = 10;

}

if ((freq >= 80000000) && (freq < 100000000)) {

Even_Divisor = 8;

}

if ((freq >= 100000000) && (freq < 146600000)) {

Even_Divisor = 6;

}

if ((freq >= 150000000) && (freq < 220000000)) {

Even_Divisor = 4;

}

void SendFrequency()

{

//freq = freq + 10;

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

if (Even_Divisor != oldEven_Divisor)

{

si5351.pll_reset(SI5351_PLLA);

oldEven_Divisor = Even_Divisor;

}

*********************************************************

Transmit Software

// Libraries

#include <Wire.h> // I2C comms library

#include <si5351.h> // Si5351Jason library

#include <ILI9341_t3.h>

#include <font_Arial.h> // Arial font library

#include <Audio.h> // Teensy audio library

#include <Metro.h> // Metro library

// Define Constants and Variables

// Display

static const int TFT_DC = 20;

static const int TFT_CS = 21;

static const int TFT_RST = 255; // 255 = unused, connect to 3.3V

static const int TFT_MOSI = 7;

static const int TFT_SCLK = 14;

static const int TFT_MISO = 12;

// Switches, relays

static const int TxRxRelay = 29;

static const int Band80mSwitch = 28;

static const int Band40mSwitch = 27;

static const int Band20mSwitch = 26;

static const int PTTSwitch = 25;

static const int ModeSwitch = 24;

// Audio panel gains

static const int Linein_Gain = 10; // Range is 0-15. 0 = 3.12 Vp-p, 15 = 0.24 Vp-p. Default = 5

static const int Lineout_Gain = 20; // Range is 13-31. 13 = 3.16 Vp-p, 31 = 1.16 Vp-p Original was 20

static const int Mic_Gain = 30; // Range is 0-63dB. Original was 0

// Rotary Encoder

static const int EncoderPushButton = 39;

static const int rotBPin = 36;

static const int rotAPin = 35;

volatile int rotState = 0;

volatile int rotAval = 1;

volatile int rotBval = 1;

volatile int rotAcc = 0;

// Other

static const int NO_HILBERT_COEFFS = 100; // Used to define the Hilbert transform filter arrays

static const long bandInit = 3690000; // where to initially set the frequency

static const long band80mStart = 3500000; // start of 80m

static const long band80mEnd = 3900000; // end of 80m

static const long band40mStart = 7000000; // start of 40m

static const long band40mEnd = 7300000; // end of 40m

static const long band20mStart = 14000000; // start of 20m

static const long band20mEnd = 14350000; // end of 20m

volatile long oldfreq = 14123456;

volatile long old80mfreq = 3700000;

volatile long old40mfreq = 7100000;

volatile long old20mfreq = 14100000;

volatile long freq = bandInit ;

volatile long radix = 1000; // how much to change the frequency. Pushing the rotary encoder switch will change this.

volatile long oldradix = 1000;

volatile int band = 80; // 80 = 80m, 40 = 40m, 20 = 20m

volatile int oldband = 0;

volatile int Even_Divisor = 0;

volatile int oldEven_Divisor = 0;

char PTT = 'R'; // R = receive, T = transmit

volatile int oldPTT = 0;

float raw_sMeter[20] = {0}; // Raw received signal strength

volatile int sMeterBar = 0; // Received signal strength

volatile int oldsMeterBar = 0;

static const int scale = 60; // Scale factor for the S Meter

volatile int x = 0;

char mode = 'L'; // L = LSB, U = USB, C = CQ, A = AM

char oldmode = 'L';

volatile int MHz10, MHz1, kHz100, kHz10, kHz1, Hz100, Hz10, Hz1 = 0;

volatile int oldMHz10, oldMHz1, oldkHz100, oldkHz10, oldkHz1, oldHz100, oldHz10, oldHz1 = 0;

// Iowa Hills Hilbert transform filter coefficients

const short Hilbert_Plus_45_Coeffs[NO_HILBERT_COEFFS] = {

(short)(32768 * 483.9743406915770E-9),

(short)(32768 * 1.866685817417670E-6),

(short)(32768 * 4.392570072495770E-6),

(short)(32768 * 8.820636712774380E-6),

(short)(32768 * 0.000016184764415848),

(short)(32768 * 0.000027249288101724),

(short)(32768 * 0.000041920439805110),

(short)(32768 * 0.000059016345361008),

(short)(32768 * 0.000076756191268614),

(short)(32768 * 0.000094055071776657),

(short)(32768 * 0.000112261583662573),

(short)(32768 * 0.000136518354793722),

(short)(32768 * 0.000175696544399550),

(short)(32768 * 0.000240067250940666),

(short)(32768 * 0.000336609833081347),

(short)(32768 * 0.000462990951098187),

(short)(32768 * 0.000602421399161912),

(short)(32768 * 0.000722301614841713),

(short)(32768 * 0.000779305755125654),

(short)(32768 * 0.000732056920489209),

(short)(32768 * 0.000559948250896998),

(short)(32768 * 0.000283585816755988),

(short)(32768 * -0.000020215761694049),

(short)(32768 * -0.000216819118897174),

(short)(32768 * -0.000131758715732279),

(short)(32768 * 0.000409948902196685),

(short)(32768 * 0.001528130963104050),

(short)(32768 * 0.003227564604759798),

(short)(32768 * 0.005351504118228274),

(short)(32768 * 0.007567804706902511),

(short)(32768 * 0.009402820162611196),

(short)(32768 * 0.010328512135999630),

(short)(32768 * 0.009894246835039863),

(short)(32768 * 0.007879714166593881),

(short)(32768 * 0.004433421126740721),

(short)(32768 * 0.000156366633965185),

(short)(32768 * -0.003904389468521576),

(short)(32768 * -0.006371988171406650),

(short)(32768 * -0.005761887634323113),

(short)(32768 * -0.000778938771957753),

(short)(32768 * 0.009365085367419172),

(short)(32768 * 0.024681757404317366),

(short)(32768 * 0.044251382160327521),

(short)(32768 * 0.066233642104189930),

(short)(32768 * 0.088062621169129954),

(short)(32768 * 0.106806616459214951),

(short)(32768 * 0.119635362035632908),

(short)(32768 * 0.124309482163432433),

(short)(32768 * 0.119596382589365807),

(short)(32768 * 0.105526834497225247),

(short)(32768 * 0.083435851600156402),

(short)(32768 * 0.055774084237545388),

(short)(32768 * 0.025722508803868269),

(short)(32768 * -0.003316774367731974),

(short)(32768 * -0.028256325810852603),

(short)(32768 * -0.046784860848984686),

(short)(32768 * -0.057671422122216751),

(short)(32768 * -0.060863961385426720),

(short)(32768 * -0.057377469068775784),

(short)(32768 * -0.049008885222883866),

(short)(32768 * -0.037947605693328487),

(short)(32768 * -0.026365178611104038),

(short)(32768 * -0.016063741251826878),

(short)(32768 * -0.008242320709669780),

(short)(32768 * -0.003409329314875374),

(short)(32768 * -0.001436295024424050),

(short)(32768 * -0.001719754923178513),

(short)(32768 * -0.003400970055132929),

(short)(32768 * -0.005589187214751837),

(short)(32768 * -0.007542651980327935),

(short)(32768 * -0.008778747041127889),

(short)(32768 * -0.009105231860961261),

(short)(32768 * -0.008583286966676333),

(short)(32768 * -0.007445876442758468),

(short)(32768 * -0.005999873442098177),

(short)(32768 * -0.004537732597630097),

(short)(32768 * -0.003276341625911221),

(short)(32768 * -0.002330120643710241),

(short)(32768 * -0.001715559019593159),

(short)(32768 * -0.001377498498508186),

(short)(32768 * -0.001224659509681699),

(short)(32768 * -0.001162953813794283),

(short)(32768 * -0.001118850197066992),

(short)(32768 * -0.001049829425495061),

(short)(32768 * -0.000943240226180188),

(short)(32768 * -0.000807608474652057),

(short)(32768 * -0.000661296218869203),

(short)(32768 * -0.000522622836450865),

(short)(32768 * -0.000403818527830429),

(short)(32768 * -0.000309261220275339),

(short)(32768 * -0.000236981246010256),

(short)(32768 * -0.000181726899678497),

(short)(32768 * -0.000137960767232952),

(short)(32768 * -0.000101749677323657),

(short)(32768 * -0.000071268112804006),

(short)(32768 * -0.000046246069278189),

(short)(32768 * -0.000026984224473470),

(short)(32768 * -0.000013519855860183),

(short)(32768 * -5.268419079329310E-6),

(short)(32768 * -1.152120275972750E-6)

};

// Iowa Hills Hilbert transform filter coefficients

const short Hilbert_Minus_45_Coeffs[NO_HILBERT_COEFFS] = {

(short)(32768 * -1.152120275972720E-6),

(short)(32768 * -5.268419079329100E-6),

(short)(32768 * -0.000013519855860182),

(short)(32768 * -0.000026984224473469),

(short)(32768 * -0.000046246069278187),

(short)(32768 * -0.000071268112804004),

(short)(32768 * -0.000101749677323656),

(short)(32768 * -0.000137960767232950),

(short)(32768 * -0.000181726899678496),

(short)(32768 * -0.000236981246010254),

(short)(32768 * -0.000309261220275334),

(short)(32768 * -0.000403818527830420),

(short)(32768 * -0.000522622836450852),

(short)(32768 * -0.000661296218869189),

(short)(32768 * -0.000807608474652046),

(short)(32768 * -0.000943240226180185),

(short)(32768 * -0.001049829425495072),

(short)(32768 * -0.001118850197067017),

(short)(32768 * -0.001162953813794315),

(short)(32768 * -0.001224659509681719),

(short)(32768 * -0.001377498498508169),

(short)(32768 * -0.001715559019593075),

(short)(32768 * -0.002330120643710066),

(short)(32768 * -0.003276341625910951),

(short)(32768 * -0.004537732597629757),

(short)(32768 * -0.005999873442097817),

(short)(32768 * -0.007445876442758181),

(short)(32768 * -0.008583286966676212),

(short)(32768 * -0.009105231860961396),

(short)(32768 * -0.008778747041128323),

(short)(32768 * -0.007542651980328638),

(short)(32768 * -0.005589187214752684),

(short)(32768 * -0.003400970055133710),

(short)(32768 * -0.001719754923178943),

(short)(32768 * -0.001436295024423829),

(short)(32768 * -0.003409329314874256),

(short)(32768 * -0.008242320709667652),

(short)(32768 * -0.016063741251823811),

(short)(32768 * -0.026365178611100354),

(short)(32768 * -0.037947605693324706),

(short)(32768 * -0.049008885222880681),

(short)(32768 * -0.057377469068773987),

(short)(32768 * -0.060863961385426962),

(short)(32768 * -0.057671422122219533),

(short)(32768 * -0.046784860848990188),

(short)(32768 * -0.028256325810860565),

(short)(32768 * -0.003316774367741772),

(short)(32768 * 0.025722508803857579),

(short)(32768 * 0.055774084237534945),

(short)(32768 * 0.083435851600147395),

(short)(32768 * 0.105526834497218600),

(short)(32768 * 0.119596382589362227),

(short)(32768 * 0.124309482163432142),

(short)(32768 * 0.119635362035635753),

(short)(32768 * 0.106806616459220294),

(short)(32768 * 0.088062621169136893),

(short)(32768 * 0.066233642104197507),

(short)(32768 * 0.044251382160334737),

(short)(32768 * 0.024681757404323448),

(short)(32768 * 0.009365085367423625),

(short)(32768 * -0.000778938771955104),

(short)(32768 * -0.005761887634322139),

(short)(32768 * -0.006371988171407000),

(short)(32768 * -0.003904389468522771),

(short)(32768 * 0.000156366633963640),

(short)(32768 * 0.004433421126739255),

(short)(32768 * 0.007879714166592786),

(short)(32768 * 0.009894246835039278),

(short)(32768 * 0.010328512135999562),

(short)(32768 * 0.009402820162611529),

(short)(32768 * 0.007567804706903086),

(short)(32768 * 0.005351504118228925),

(short)(32768 * 0.003227564604760380),

(short)(32768 * 0.001528130963104480),

(short)(32768 * 0.000409948902196933),

(short)(32768 * -0.000131758715732195),

(short)(32768 * -0.000216819118897210),

(short)(32768 * -0.000020215761694147),

(short)(32768 * 0.000283585816755878),

(short)(32768 * 0.000559948250896909),

(short)(32768 * 0.000732056920489157),

(short)(32768 * 0.000779305755125639),

(short)(32768 * 0.000722301614841724),

(short)(32768 * 0.000602421399161936),

(short)(32768 * 0.000462990951098213),

(short)(32768 * 0.000336609833081367),

(short)(32768 * 0.000240067250940678),

(short)(32768 * 0.000175696544399555),

(short)(32768 * 0.000136518354793723),

(short)(32768 * 0.000112261583662573),

(short)(32768 * 0.000094055071776658),

(short)(32768 * 0.000076756191268616),

(short)(32768 * 0.000059016345361010),

(short)(32768 * 0.000041920439805112),

(short)(32768 * 0.000027249288101726),

(short)(32768 * 0.000016184764415849),

(short)(32768 * 8.820636712774440E-6),

(short)(32768 * 4.392570072495580E-6),

(short)(32768 * 1.866685817417500E-6),

(short)(32768 * 483.9743406915230E-9)

};

// Instantiate the Objects

ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);

Si5351 si5351; // Name for the Si5351 DDS

AudioControlSGTL5000 audioShield; // Name for the Teensy audio CODEC on the audio shield

Metro sMeterMetro = Metro(150); // Name for the sMeter update timer

// Audio shield objects

AudioInputI2S audioInput; // Name for the input to the audio shield (either line-in or mic)

AudioOutputI2S audioOutput; // Name for the output of the audio shield (either headphones or line-out)

// Receiver

AudioFilterFIR RX_Hilbert_Plus_45; // Name for the RX +45 Hilbert transform

AudioFilterFIR RX_Hilbert_Minus_45; // Name for the RX +45 Hilbert transform

AudioMixer4 RX_Summer; // Name for the RX summer

AudioAnalyzePeak S_Meter; // Received signal strength

// Transmitter

AudioFilterFIR TX_Hilbert_Plus_45; // Name for the TX +45 Hilbert transform

AudioFilterFIR TX_Hilbert_Minus_45; // Name for the TX +45 Hilbert transform

AudioMixer4 TX_I_Sideband_Switch; // Name for the sideband switching summer for the I channel

// Audio shield connections

// Receiver

AudioConnection patchCord5(audioInput, 0, RX_Hilbert_Plus_45, 0); // Left channel to Hilbert transform +45

AudioConnection patchCord10(audioInput, 1, RX_Hilbert_Minus_45, 0); // Right channel to Hilbert transform -45

AudioConnection patchCord15(RX_Hilbert_Plus_45, 0, RX_Summer, 0); // Hilbert transform +45 to receiver summer

AudioConnection patchCord20(RX_Hilbert_Minus_45, 0, RX_Summer, 1); // Hilbert transform -45 to receiver summer

AudioConnection patchCord25(RX_Summer, 0, S_Meter, 0);

AudioConnection patchCord30(RX_Summer, 0, audioOutput, 0);

AudioConnection patchCord35(RX_Summer, 0, audioOutput, 1);

// Transmitter

AudioConnection patchCord40(audioInput, 0, TX_Hilbert_Plus_45, 0); // Mic audio to Hilbert transform +45

AudioConnection patchCord45(audioInput, 0, TX_Hilbert_Minus_45, 0); // Mic audio to Hilbert transform -45

AudioConnection patchCord50(TX_Hilbert_Plus_45, 0, TX_I_Sideband_Switch, 0); // In phase channel to sideband switch

AudioConnection patchCord55(TX_I_Sideband_Switch, 0, audioOutput, 0); // I to left channel out

AudioConnection patchCord60(TX_Hilbert_Minus_45, 0, audioOutput, 1); // Q to right channel out

void setup()

{

// Setup screen

tft.begin();

tft.setRotation(1);

tft.fillScreen(ILI9341_BLACK);

// Setup input/output

pinMode(rotAPin, INPUT);

pinMode(rotBPin, INPUT);

pinMode(EncoderPushButton, INPUT);

pinMode(ModeSwitch, INPUT);

pinMode(Band80mSwitch, INPUT);

pinMode(Band40mSwitch, INPUT);

pinMode(Band20mSwitch, INPUT);

pinMode(PTTSwitch, INPUT);

pinMode(TxRxRelay, OUTPUT);

digitalWrite(rotAPin, HIGH);

digitalWrite(rotBPin, HIGH);

digitalWrite(EncoderPushButton, HIGH);

digitalWrite(ModeSwitch, HIGH);

digitalWrite(Band80mSwitch, HIGH);

digitalWrite(Band40mSwitch, HIGH);

digitalWrite(Band20mSwitch, HIGH);

digitalWrite(PTTSwitch, HIGH);

digitalWrite(TxRxRelay, LOW);

// Setup interrupt pins

attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);

attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);

// Initialize the DDS

si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0); // 25MHz crystal = 0, 27MHz crystal = 27000000

si5351.set_correction(62799, SI5351_PLL_INPUT_XO); // Set to specific Si5351 calibration number

si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_6MA);

si5351.drive_strength(SI5351_CLK1, SI5351_DRIVE_6MA);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

si5351.pll_reset(SI5351_PLLA);

// Setup the audio shield

AudioNoInterrupts();

AudioMemory(12);

audioShield.enable();

AudioInterrupts();

// Setup initial transceiver state

Receive();

UpdateMode();

UpdateDisplay();

UpdateFreqDisplay();

}

void loop()

{

// Check to see if the freq has changed

if (freq != oldfreq) // Check to see if the frequency has changed. If so, update everything.

{

EvenDivisor();

UpdateFreqDisplay();

SendFrequency();

oldfreq = freq;

}

// Check to see if the radix has changed

if (radix != oldradix)

{

UpdateFreqDisplay();

oldradix = radix;

}

// Check the mode switch

if (digitalRead(ModeSwitch) == LOW)

mode = 'L';

else

mode = 'U';

// Check to see if the mode has changed

if (mode != oldmode) // Only update the display on mode change

{

UpdateMode();

UpdateDisplay();

oldmode = mode;

}

// Check the band switch

if (digitalRead(Band80mSwitch) == LOW)

band = 80; // 80m band

if (digitalRead(Band40mSwitch) == LOW)

band = 40; // 40m band

if (digitalRead(Band20mSwitch) == LOW)

band = 20; // 20m band

// Check to see if the band has changed

if (band != oldband) // Only update the display on band change

{

UpdateBand();

UpdateFreqDisplay();

oldband = band;

}

// Check the PTT switch

if (digitalRead(PTTSwitch) == LOW)

PTT = 'T';

else

PTT = 'R';

// Check to see if PTT has changed

if (PTT != oldPTT)

{

if (PTT == 'T')

Transmit();

if (PTT == 'R')

Receive();

UpdateDisplay();

oldPTT = PTT;

}

// Read raw signal strength (running average)

if (S_Meter.available())

{

raw_sMeter[x] = S_Meter.read() * scale;

x++;

if (x == 20)

{

x = 0;

float av_raw_sMeter = 0;

for (int i = 0; i <= 19; i++)

av_raw_sMeter = av_raw_sMeter + raw_sMeter[i];

sMeterBar = (av_raw_sMeter / 20) * 250;

}

if (sMeterMetro.check() == 1) // Update sMeter every 250mS

{

UpdateSMeter();

oldsMeterBar = sMeterBar;

}

void Transmit()

{

AudioNoInterrupts();

// Turn off the receiver

audioShield.muteHeadphone();

RX_Hilbert_Plus_45.end();

RX_Hilbert_Minus_45.end();

// Turn on the trasmitter

audioShield.inputSelect(AUDIO_INPUT_MIC);

audioShield.micGain(Mic_Gain);

audioShield.unmuteLineout(); // Output to the TX

audioShield.lineOutLevel(Lineout_Gain);

TX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NO_HILBERT_COEFFS);

TX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NO_HILBERT_COEFFS);

AudioInterrupts();

digitalWrite(TxRxRelay, HIGH); // Key the transmitter

}

void Receive()

{

digitalWrite(TxRxRelay, LOW); // Unkey the transmitter

AudioNoInterrupts();

// Turn off the transmitter

audioShield.muteLineout();

TX_Hilbert_Plus_45.end();

TX_Hilbert_Minus_45.end();

// Turn on the receiver

audioShield.inputSelect(AUDIO_INPUT_LINEIN);

audioShield.lineInLevel(Linein_Gain);

audioShield.unmuteHeadphone(); // Output to the audio amplifier

audioShield.volume(0.7);

RX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NO_HILBERT_COEFFS);

RX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NO_HILBERT_COEFFS);

AudioInterrupts();

}

void UpdateMode()

{

if (mode == 'L') // LSB

{

RX_Summer.gain(0, 1);

RX_Summer.gain(1, -1); // Invert Q channel

RX_Summer.gain(2, 0);

RX_Summer.gain(3, 0);

TX_I_Sideband_Switch.gain(0, 1); // No inversion of I channel

TX_I_Sideband_Switch.gain(1, 0);

TX_I_Sideband_Switch.gain(2, 0);

TX_I_Sideband_Switch.gain(3, 0);

}

if (mode == 'U') // USB

{

RX_Summer.gain(0, 1);

RX_Summer.gain(1, 1); // No inversion of Q channel

RX_Summer.gain(2, 0);

RX_Summer.gain(3, 0);

TX_I_Sideband_Switch.gain(0, -1); // Invert I channel

TX_I_Sideband_Switch.gain(1, 0);

TX_I_Sideband_Switch.gain(2, 0);

TX_I_Sideband_Switch.gain(3, 0);

}

void UpdateBand()

{

if ((band == 80) && (oldband == 40))

{

old40mfreq = freq;

freq = old80mfreq;

}

if ((band == 80) && (oldband == 20))

{

old20mfreq = freq;

freq = old80mfreq;

}

if ((band == 40) && (oldband == 80))

{

old80mfreq = freq;

freq = old40mfreq;

}

if ((band == 40) && (oldband == 20))

{

old20mfreq = freq;

freq = old40mfreq;

}

if ((band == 20) && (oldband == 80))

{

old80mfreq = freq;

freq = old20mfreq;

}

if ((band == 20) && (oldband == 40))

{

old40mfreq = freq;

freq = old20mfreq;

}

// Interrupt routines

void ISRrotAChange()

{

if (digitalRead(rotAPin))

{

rotAval = 1;

UpdateRot();

}

else

{

rotAval = 0;

UpdateRot();

}

void ISRrotBChange()

{

if (digitalRead(rotBPin))

{

rotBval = 1;

UpdateRot();

}

else

{

rotBval = 0;

UpdateRot();

}

void UpdateRot()

{

switch (rotState)

{

case 0: // Idle state, look for direction

if (!rotBval)

rotState = 1; // CW 1

if (!rotAval)

rotState = 11; // CCW 1

break;

case 1: // CW, wait for A low while B is low

if (!rotBval)

{

if (!rotAval)

{

// either increment radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

if (radix == 100000)

radix = 10000;

else if (radix == 10000)

radix = 1000;

else if (radix == 1000)

radix = 100;

else if (radix == 100)

radix = 10;

else if (radix == 10)

radix = 1;

else

radix = 100000;

}

else

{

freq = (freq + radix);

if (band == 80)

if (freq > band80mEnd)

freq = band80mEnd;

if (band == 40)

if (freq > band40mEnd)

freq = band40mEnd;

if (band == 20)

if (freq > band20mEnd)

freq = band20mEnd;

}

rotState = 2; // CW 2

}

else if (rotAval)

rotState = 0; // It was just a glitch on B, go back to start

break;

case 2: // CW, wait for B high

if (rotBval)

rotState = 3; // CW 3

break;

case 3: // CW, wait for A high

if (rotAval)

rotState = 0; // back to idle (detent) state

break;

case 11: // CCW, wait for B low while A is low

if (!rotAval)

{

if (!rotBval)

{

// either decrement radixindex or freq

if (digitalRead(EncoderPushButton) == LOW)

{

if (radix == 1)

radix = 10;

else if (radix == 10)

radix = 100;

else if (radix == 100)

radix = 1000;

else if (radix == 1000)

radix = 10000;

else if (radix == 10000)

radix = 100000;

else

radix = 1;

}

else

{

freq = (freq - radix);

if (band == 80)

if (freq < band80mStart)

freq = band80mStart;

if (band == 40)

if (freq < band40mStart)

freq = band40mStart;

if (band == 20)

if (freq < band20mStart)

freq = band20mStart;

}

rotState = 12; // CCW 2

}

else if (rotBval)

rotState = 0; // It was just a glitch on A, go back to start

break;

case 12: // CCW, wait for A high

if (rotAval)

rotState = 13; // CCW 3

break;

case 13: // CCW, wait for B high

if (rotBval)

rotState = 0; // back to idle (detent) state

break;

}

void UpdateDisplay()

{

tft.setFont(Arial_16);

// RX, TX

if (PTT == 'R')

{

tft.drawRoundRect(0, 0, 60, 40, 5, tft.color565(0, 255, 0));

tft.setCursor(12, 12);

tft.setTextColor(tft.color565(0, 255, 0)); // Green

tft.println("RX");

tft.drawRoundRect(70, 0, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(83, 12);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("TX");

}

if (PTT == 'T')

{

tft.drawRoundRect(0, 0, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(12, 12);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("RX");

tft.drawRoundRect(70, 0, 60, 40, 5, tft.color565(255, 0, 0));

tft.setCursor(83, 12);

tft.setTextColor(tft.color565(255, 0, 0)); // Red

tft.println("TX");

}

// Tune

tft.drawRoundRect(140, 0, 80, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(149, 12);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("TUNE");

// Mode

if (mode == 'U')

{

tft.drawRoundRect(0, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(9, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("LSB");

tft.drawRoundRect(70, 50, 60, 40, 5, tft.color565(255, 255, 0)); // Yellow

tft.setCursor(79, 62);

tft.setTextColor(tft.color565(255, 255, 0));

tft.println("USB");

tft.drawRoundRect(140, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(150, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("CW");

}

if (mode == 'L')

{

tft.drawRoundRect(0, 50, 60, 40, 5, tft.color565(255, 255, 0)); // Yellow

tft.setCursor(9, 62);

tft.setTextColor(tft.color565(255, 255, 0));

tft.println("LSB");

tft.drawRoundRect(70, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(79, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("USB");

tft.drawRoundRect(140, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(150, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("CW");

}

if (mode == 'C')

{

tft.drawRoundRect(0, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(9, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("LSB");

tft.drawRoundRect(70, 50, 60, 40, 5, tft.color565(160, 160, 160));

tft.setCursor(79, 62);

tft.setTextColor(tft.color565(160, 160, 160));

tft.println("USB");

tft.drawRoundRect(140, 50, 60, 40, 5, tft.color565(255, 255, 0)); // Yellow

tft.setCursor(150, 62);

tft.setTextColor(tft.color565(255, 255, 0));

tft.println("CW");

}

// S Meter

tft.setFont(Arial_8);

tft.setTextColor(ILI9341_WHITE);

tft.setCursor(6, 230);

tft.println("S1");

tft.setCursor(38, 230);

tft.println("3");

tft.setCursor(68, 230);

tft.println("5");

tft.setCursor(98, 230);

tft.println("7");

tft.setCursor(128, 230);

tft.println("9");

tft.setTextColor(ILI9341_RED);

tft.setCursor(150, 230);

tft.println("+20");

tft.setCursor(180, 230);

tft.println("+40");

tft.setCursor(210, 230);

tft.println("+60");

tft.drawLine(10, 220, 10, 215, ILI9341_WHITE);

tft.drawLine(25, 220, 25, 218, ILI9341_WHITE);

tft.drawLine(40, 220, 40, 215, ILI9341_WHITE);

tft.drawLine(55, 220, 55, 218, ILI9341_WHITE);

tft.drawLine(70, 220, 70, 215, ILI9341_WHITE);

tft.drawLine(85, 220, 85, 218, ILI9341_WHITE);

tft.drawLine(100, 220, 100, 215, ILI9341_WHITE);

tft.drawLine(115, 220, 115, 218, ILI9341_WHITE);

tft.drawLine(130, 220, 130, 215, ILI9341_WHITE);

tft.drawLine(145, 220, 145, 218, ILI9341_WHITE);

tft.drawLine(160, 220, 160, 215, ILI9341_RED);

tft.drawLine(175, 220, 175, 218, ILI9341_RED);

tft.drawLine(190, 220, 190, 215, ILI9341_RED);

tft.drawLine(205, 220, 205, 218, ILI9341_RED);

tft.drawLine(220, 220, 220, 215, ILI9341_RED);

tft.drawLine(235, 220, 235, 218, ILI9341_RED);

tft.drawLine(10, 221, 159, 221, ILI9341_WHITE);

tft.drawLine(160, 221, 235, 221, ILI9341_RED);

}

void UpdateFreqDisplay()

{

oldMHz10 = (oldfreq % 100000000) / 10000000;

oldMHz1 = (oldfreq % 10000000) / 1000000;

oldkHz100 = (oldfreq % 1000000) / 100000;

oldkHz10 = (oldfreq % 100000) / 10000;

oldkHz1 = (oldfreq % 10000) / 1000;

oldHz100 = (oldfreq % 1000) / 100;

oldHz10 = (oldfreq % 100) / 10;

oldHz1 = (oldfreq % 10) / 1;

MHz10 = (freq % 100000000) / 10000000;

MHz1 = (freq % 10000000) / 1000000;

kHz100 = (freq % 1000000) / 100000;

kHz10 = (freq % 100000) / 10000;

kHz1 = (freq % 10000) / 1000;

Hz100 = (freq % 1000) / 100;

Hz10 = (freq % 100) / 10;

Hz1 = (freq % 10) / 1;

tft.setFont(Arial_40);

//10MHz

if (oldfreq > 10000000)

{

if (MHz10 != oldMHz10)

{

tft.setCursor(10, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldMHz10);

}

if (freq > 10000000)

{

tft.setCursor(10, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(MHz10);

}

//1MHz

if (MHz1 != oldMHz1)

{

tft.setCursor(40, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldMHz1);

tft.setCursor(40, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(MHz1);

}

// .

tft.setTextColor(ILI9341_WHITE);

tft.setCursor(70, 115);

tft.println(".");

//100kHz

if (kHz100 != oldkHz100)

{

tft.setCursor(85, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldkHz100);

tft.setCursor(85, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(kHz100);

}

//10kHz

if (kHz10 != oldkHz10)

{

tft.setCursor(115, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldkHz10);

tft.setCursor(115, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(kHz10);

}

//1kHz

if (kHz1 != oldkHz1)

{

tft.setCursor(145, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldkHz1);

tft.setCursor(145, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(kHz1);

}

// .

tft.setTextColor(ILI9341_WHITE);

tft.setCursor(175, 115);

tft.println(".");

//100Hz

if (Hz100 != oldHz100)

{

tft.setCursor(190, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldHz100);

tft.setCursor(190, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(Hz100);

}

//10Hz

if (Hz10 != oldHz10)

{

tft.setCursor(220, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldHz10);

tft.setCursor(220, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(Hz10);

}

//1Hz

if (Hz1 != oldHz1)

{

tft.setCursor(250, 115);

tft.setTextColor(ILI9341_BLACK);

tft.println(oldHz1);

tft.setCursor(250, 115);

tft.setTextColor(ILI9341_WHITE);

tft.println(Hz1);

}

// Radix line

if (oldradix == 1)

tft.fillRect(258, 160, 15, 4, ILI9341_BLACK);

if (oldradix == 10)

tft.fillRect(228, 160, 15, 4, ILI9341_BLACK);

if (oldradix == 100)

tft.fillRect(198, 160, 15, 4, ILI9341_BLACK);

if (oldradix == 1000)

tft.fillRect(153, 160, 15, 4, ILI9341_BLACK);

if (oldradix == 10000)

tft.fillRect(123, 160, 15, 4, ILI9341_BLACK);

if (oldradix == 100000)

tft.fillRect(93, 160, 15, 4, ILI9341_BLACK);

if (radix == 1)

tft.fillRect(258, 160, 15, 4, ILI9341_WHITE);

if (radix == 10)

tft.fillRect(228, 160, 15, 4, ILI9341_WHITE);

if (radix == 100)

tft.fillRect(198, 160, 15, 4, ILI9341_WHITE);

if (radix == 1000)

tft.fillRect(153, 160, 15, 4, ILI9341_WHITE);

if (radix == 10000)

tft.fillRect(123, 160, 15, 4, ILI9341_WHITE);

if (radix == 100000)

tft.fillRect(93, 160, 15, 4, ILI9341_WHITE);

oldMHz10 = MHz10;

oldMHz1 = MHz1;

oldkHz100 = kHz100;

oldkHz10 = kHz10;

oldkHz1 = kHz1;

oldHz100 = Hz100;

oldHz10 = Hz10;

oldHz1 = Hz1;

}

void UpdateSMeter()

{

tft.fillRect(10, 205, oldsMeterBar, 4, ILI9341_BLACK);

tft.fillRect(10, 205, sMeterBar, 4, tft.color565(0, 255, 255));

}

void EvenDivisor()

{

if (freq < 6850000)

Even_Divisor = 126;

if ((freq >= 6850000) && (freq < 9500000))

Even_Divisor = 88;

if ((freq >= 9500000) && (freq < 13600000))

Even_Divisor = 64;

if ((freq >= 13600000) && (freq < 17500000))

Even_Divisor = 44;

if ((freq >= 17500000) && (freq < 25000000))

Even_Divisor = 34;

if ((freq >= 25000000) && (freq < 36000000))

Even_Divisor = 24;

if ((freq >= 36000000) && (freq < 45000000))

Even_Divisor = 18;

if ((freq >= 45000000) && (freq < 60000000))

Even_Divisor = 14;

if ((freq >= 60000000) && (freq < 80000000))

Even_Divisor = 10;

if ((freq >= 80000000) && (freq < 100000000))

Even_Divisor = 8;

if ((freq >= 100000000) && (freq < 146600000))

Even_Divisor = 6;

if ((freq >= 150000000) && (freq < 220000000))

Even_Divisor = 4;

}

void SendFrequency()

{

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK0);

si5351.set_freq_manual(freq * SI5351_FREQ_MULT, Even_Divisor * freq * SI5351_FREQ_MULT, SI5351_CLK1);

si5351.set_phase(SI5351_CLK0, 0);

si5351.set_phase(SI5351_CLK1, Even_Divisor);

if (Even_Divisor != oldEven_Divisor)

{

si5351.pll_reset(SI5351_PLLA);

oldEven_Divisor = Even_Divisor;

}

***********************************************************

Thursday, 6 June 2019

20m WSPR Beacon

Below is the software. Looks like the formatting has been affected when it was copied over. Auto format in the Arduino IDE works great!

*****************************************************************

#include <DDS.h>
#include <SoftwareSerial.h>

#define RESET 2
#define FQ_UD 3
#define W_CLK 4
#define DATA 5
#define HighPWR_LED 6
#define LowPWR_LED 7
#define TX_LED 8
#define Percent25_LED 9
#define Percent50_LED 10
#define Percent75_LED 11
#define Percent100_LED 12
#define SerialTX 13
#define SerialRX A0
#define Tone0_LED A1
#define Tone1_LED A2
#define Tone2_LED A3
#define Tone3_LED A4

const int GPS_BUFFER_SIZE = 200; // The maximum size allowed for an NMEA sentence.
char sentence[GPS_BUFFER_SIZE] = {0};
volatile int _sentenceIndex = 0;
volatile char character = 0;
volatile int SymbolIndex = 0;
volatile int TX = 0;
volatile int Power = 0;
volatile int _UTCMinutes, _UTCSeconds = 0;
volatile long freq = 0;

const byte LowPWR_WSPR_Data[] = {3, 1, 2, 0, 2, 2, 0, 2, 3, 2, 0, 0, 1, 1, 1, 0, 2, 2, 3, 2, 2, 3, 2, 3, 1, 3, 3, 2, 0, 2, 0, 2,
0, 2, 3, 2, 2, 3, 2, 1, 0, 0, 2, 0, 0, 0, 1, 0, 1, 3, 2, 2, 1, 3, 0, 3, 0, 2, 2, 1, 3, 0, 3, 0,
2, 0, 0, 3, 3, 2, 3, 2, 3, 2, 3, 0, 1, 0, 0, 1, 2, 2, 1, 2, 1, 3, 0, 0, 0, 3, 3, 0, 1, 0, 1, 2,
2, 2, 3, 0, 0, 0, 2, 0, 3, 0, 0, 3, 0, 0, 3, 3, 3, 2, 3, 1, 2, 0, 1, 3, 2, 3, 0, 0, 2, 1, 3, 1,
2, 0, 0, 2, 2, 3, 0, 1, 0, 2, 1, 3, 0, 0, 0, 2, 2, 0, 0, 3, 3, 0, 3, 0, 3, 3, 2, 2, 2, 1, 3, 2,
2, 0
};

const byte HighPWR_WSPR_Data[] = {3, 1, 2, 0, 2, 0, 0, 2, 3, 0, 0, 2, 1, 3, 1, 2, 2, 2, 3, 2, 2, 3, 2, 3, 1, 3, 3, 0, 0, 0, 0, 0,
0, 2, 3, 0, 2, 1, 2, 3, 0, 0, 2, 0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 0, 3, 0, 0, 2, 1, 3, 0, 3, 0,
2, 0, 0, 1, 3, 2, 3, 2, 3, 2, 3, 2, 1, 0, 0, 1, 2, 2, 1, 0, 1, 1, 0, 0, 0, 1, 3, 2, 1, 0, 1, 0,
2, 2, 3, 0, 0, 2, 2, 0, 3, 2, 0, 1, 0, 2, 3, 1, 3, 0, 3, 1, 2, 2, 1, 3, 2, 1, 0, 2, 2, 3, 3, 1,
2, 0, 0, 2, 2, 1, 0, 3, 0, 2, 1, 1, 0, 0, 0, 2, 2, 0, 0, 3, 3, 2, 3, 0, 3, 1, 2, 0, 2, 3, 3, 0,
2, 0
};

// Create the objects
DDS dds(W_CLK, FQ_UD, DATA, RESET);
SoftwareSerial mySerial(SerialRX, SerialTX);

void setup()
{
// Initialize the AD9850
dds.init();
dds.trim(125000000);
dds.setFrequency(0);

// Initialize the Software serial port
mySerial.begin(38400);

pinMode(HighPWR_LED, OUTPUT);
pinMode(LowPWR_LED, OUTPUT);
pinMode(TX_LED, OUTPUT);
pinMode(Percent25_LED, OUTPUT);
pinMode(Percent50_LED, OUTPUT);
pinMode(Percent75_LED, OUTPUT);
pinMode(Percent100_LED, OUTPUT);
pinMode(Tone0_LED, OUTPUT);
pinMode(Tone1_LED, OUTPUT);
pinMode(Tone2_LED, OUTPUT);
pinMode(Tone3_LED, OUTPUT);

digitalWrite(HighPWR_LED, LOW);
digitalWrite(LowPWR_LED, LOW);
digitalWrite(TX_LED, LOW);
digitalWrite(Percent25_LED, LOW);
digitalWrite(Percent50_LED, LOW);
digitalWrite(Percent75_LED, LOW);
digitalWrite(Percent100_LED, LOW);
digitalWrite(Tone0_LED, LOW);
digitalWrite(Tone1_LED, LOW);
digitalWrite(Tone2_LED, LOW);
digitalWrite(Tone3_LED, LOW);
}

void loop()
{
if (TX == 0)
{
if (mySerial.available())
{
character = mySerial.read(); // Get a single character
sentence[_sentenceIndex] = character; // Append the current character to the sentence
_sentenceIndex++;

if (_sentenceIndex == GPS_BUFFER_SIZE) // Check for overrun of the sentence array. If so, restart
_sentenceIndex = 0;

if (character == '\r') // Carriage return. Look for RMC sentence
{
_sentenceIndex = 0; // Reset index counter ready for next timet

if ((sentence[4] == 'R') && (sentence[5] == 'M') && (sentence[6] == 'C'))
{
_UTCSeconds = (10 * (sentence[12] - 48) + (sentence[13] - 48));
_UTCMinutes = (10 * (sentence[10] - 48) + (sentence[11] - 48));

if ((_UTCMinutes % 2 == 0) && ((_UTCSeconds == 0) || (_UTCSeconds == 1) || (_UTCSeconds == 2)))
TX = 1;
}
}
}
}

if (TX == 1)
{
digitalWrite(TX_LED, HIGH); // Turn on the TX LED
freq = random(14097000, 14097200); // Select a random TX frequency

if (Power == 0)
for (SymbolIndex = 0; SymbolIndex <= 161; SymbolIndex++)
{
dds.setFrequency(freq + (LowPWR_WSPR_Data[SymbolIndex] * 1.4648)); // Change DDS freq
ToneLEDs(LowPWR_WSPR_Data[SymbolIndex]); // Update tone LEDs
ProgressLEDs(SymbolIndex); // Update progress LEDs
delay(683);
}

if (Power == 1)
for (SymbolIndex = 0; SymbolIndex <= 161; SymbolIndex++)
{
dds.setFrequency(freq + (HighPWR_WSPR_Data[SymbolIndex] * 1.4648)); // Change DDS freq
ToneLEDs(HighPWR_WSPR_Data[SymbolIndex]); // Update tone LEDs
ProgressLEDs(SymbolIndex); // Update progress LEDs
delay(683);
}

dds.setFrequency(0); // Turn off the DDS
ToneLEDs(4); // Turn off the tone LEDs
ProgressLEDs(0); // Turn off the progress LEDs
digitalWrite(TX_LED, LOW); // Turn off the TX LED
TX = 0;
Power = !Power; // Toggle transmit power
PowerLEDs(Power); // Toggle power level LED
}
}

void ToneLEDs(int x)
{
switch (x)
{
case 4:
digitalWrite(Tone0_LED, LOW);
digitalWrite(Tone1_LED, LOW);
digitalWrite(Tone2_LED, LOW);
digitalWrite(Tone3_LED, LOW);
break;
case 3:
digitalWrite(Tone0_LED, LOW);
digitalWrite(Tone1_LED, LOW);
digitalWrite(Tone2_LED, LOW);
digitalWrite(Tone3_LED, HIGH);
break;
case 2:
digitalWrite(Tone0_LED, LOW);
digitalWrite(Tone1_LED, LOW);
digitalWrite(Tone2_LED, HIGH);
digitalWrite(Tone3_LED, LOW);
break;
case 1:
digitalWrite(Tone0_LED, LOW);
digitalWrite(Tone1_LED, HIGH);
digitalWrite(Tone2_LED, LOW);
digitalWrite(Tone3_LED, LOW);
break;
case 0:
digitalWrite(Tone0_LED, HIGH);
digitalWrite(Tone1_LED, LOW);
digitalWrite(Tone2_LED, LOW);
digitalWrite(Tone3_LED, LOW);
break;
}
}

void ProgressLEDs(int x)
{
if (x <= 30)
{
digitalWrite(Percent25_LED, LOW);
digitalWrite(Percent50_LED, LOW);
digitalWrite(Percent75_LED, LOW);
digitalWrite(Percent100_LED, LOW);
}
if ((x > 30) && (x <= 70))
{
digitalWrite(Percent25_LED, LOW);
digitalWrite(Percent50_LED, LOW);
digitalWrite(Percent75_LED, LOW);
digitalWrite(Percent100_LED, HIGH);
}
if ((x > 70) && (x <= 110))
{
digitalWrite(Percent25_LED, LOW);
digitalWrite(Percent50_LED, LOW);
digitalWrite(Percent75_LED, HIGH);
digitalWrite(Percent100_LED, HIGH);
}
if ((x > 110) && (x <= 150))
{
digitalWrite(Percent25_LED, LOW);
digitalWrite(Percent50_LED, HIGH);
digitalWrite(Percent75_LED, HIGH);
digitalWrite(Percent100_LED, HIGH);
}
if (x > 150)
{
digitalWrite(Percent25_LED, HIGH);
digitalWrite(Percent50_LED, HIGH);
digitalWrite(Percent75_LED, HIGH);
digitalWrite(Percent100_LED, HIGH);
}
}

void PowerLEDs(int x)
{
switch (x)
{
case 0:
digitalWrite(LowPWR_LED, HIGH);
digitalWrite(HighPWR_LED, LOW);
break;
case 1:
digitalWrite(LowPWR_LED, LOW);
digitalWrite(HighPWR_LED, HIGH);
break;
}
}
*************************************************************

The link to the GENWSPR file is: http://www.g4jnt.com/JTModesBcns.htm

Saturday, 20 April 2019

Portable 20m SSB Rig

See YouTube for video log.

BPF

Ant Amplifier

IF Amp

#include <Wire.h>
#include <SPI.h>
#include <TM1637Display.h>
#include <si5351.h>
#include "LowPower.h"

const uint32_t bandStart = 14000000; // start of 20m
const uint32_t bandEnd = 14350000; // end of 20m
const uint32_t bandInit = 14100000; // where to initially set the frequency
volatile long currentfreq = 0;
volatile long oldfreq = 0;
volatile int currentmode = 0;
volatile int oldmode = 0;

volatile uint32_t freq = bandInit ; // this is a variable (changes) - set it to the beginning of the band
volatile uint32_t radix = 1000; // how much to change the frequency by, clicking the rotary encoder will change this.

const uint32_t BFO_freq = 8998450; // 8998450 = high side injection. For low side injection use 9001350;

// Rotary encoder pins and other inputs
static const int rotBPin = 2;
static const int rotAPin = 3;
static const int pushPin = 4;
static const int PTTInput = 8;
static const int brightnessPin = A3;
static const int tunespeedLED = A2;
static const int gnd = 10;
static const int vcc = 11;
static const int DIO = 12;
static const int CLK = 13;

// Rotary encoder variables, used by interrupt routines
volatile int rotState = 0;
volatile int rotAval = 1;
volatile int rotBval = 1;

volatile long remainder = 0;
volatile long OnesHz = 0;
volatile long TensHz = 0;
volatile long HundredsHz = 0;
volatile long OneskHz = 0;
volatile long TenskHz = 0;
volatile long HundredskHz = 0;
volatile long OnesMHz = 0;
volatile long TensMHz = 0;
volatile int Brightness = 3;
volatile int batterySave = 0;

// Instantiate the Objects
TM1637Display display(CLK, DIO); // CLK, DIO
Si5351 si5351;

void setup()
{
// Set up frequency and radix switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(pushPin, INPUT);
pinMode(brightnessPin, INPUT);
pinMode(gnd, OUTPUT);
pinMode(tunespeedLED, OUTPUT);
pinMode(vcc, OUTPUT);
pinMode(PTTInput, INPUT);

// Set up pull-up resistors on inputs
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(pushPin, HIGH);
digitalWrite(brightnessPin, HIGH);
digitalWrite(gnd, LOW);
digitalWrite(vcc, HIGH);
digitalWrite(tunespeedLED, LOW);
digitalWrite(PTTInput, LOW);

// Set up interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);

// Initialize the display
display.setBrightness(Brightness, true);
UpdateDisplay();
delay(1000);

// Initialize the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
si5351.set_correction(87000, SI5351_PLL_INPUT_XO); // Set to specific Si5351 calibration number
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_2MA);
si5351.drive_strength(SI5351_CLK2, SI5351_DRIVE_2MA);
si5351.set_freq((freq * 100ULL), SI5351_CLK0);
si5351.set_freq((BFO_freq * 100ULL), SI5351_CLK2);
}

void loop()
{
LowPower.idle(SLEEP_60MS, ADC_OFF, TIMER2_OFF, TIMER1_OFF, TIMER0_ON, SPI_OFF, USART0_OFF, TWI_OFF);

currentmode = digitalRead(PTTInput);
if (currentmode != oldmode)
{
SendFrequency();
oldmode = currentmode;
}

currentfreq = getfreq(); // Interrupt safe method to get the current frequency
if (currentfreq != oldfreq)
{
UpdateDisplay();
SendFrequency();
oldfreq = currentfreq;
}

if (digitalRead(brightnessPin) == LOW)
{
Brightness--;
display.setBrightness(Brightness, true);
if (Brightness == -1)
{
display.setBrightness(0, false);
digitalWrite(tunespeedLED, LOW);
batterySave = 1;
}
if (Brightness == -2)
{
Brightness = 3;
batterySave = 0;
}
UpdateDisplay();
delay(500);
}

if ((radix == 100) && (batterySave == 0))
digitalWrite(tunespeedLED, HIGH);

if (radix == 1000)
digitalWrite(tunespeedLED, LOW);
}

void wakeUp()
{
// Just a handler for the sleep pin interrupt.
}

long getfreq()
{
long temp_freq;
cli();
temp_freq = freq;
sei();
return temp_freq;
}

// Interrupt routines
void ISRrotAChange()
{
if (digitalRead(rotAPin))
{
rotAval = 1;
UpdateRot();
}
else
{
rotAval = 0;
UpdateRot();
}
}

void ISRrotBChange()
{
if (digitalRead(rotBPin))
{
rotBval = 1;
UpdateRot();
}
else
{
rotBval = 0;
UpdateRot();
}
}

void UpdateRot()
{
switch (rotState)
{

case 0: // Idle state, look for direction
if (!rotBval)
rotState = 1; // CW 1
if (!rotAval)
rotState = 11; // CCW 1
break;

case 1: // CW, wait for A low while B is low
if (!rotBval)
{
if (!rotAval)
{
// either increment radixindex or freq
if (digitalRead(pushPin) == LOW)
{
if (radix == 1000)
radix = 100;
else if (radix == 100)
radix = 1000;
}
else
{
freq = (freq + radix);
if (freq > bandEnd)
freq = bandEnd;
}
rotState = 2; // CW 2
}
}
else if (rotAval)
rotState = 0; // It was just a glitch on B, go back to start
break;

case 2: // CW, wait for B high
if (rotBval)
rotState = 3; // CW 3
break;

case 3: // CW, wait for A high
if (rotAval)
rotState = 0; // back to idle (detent) state
break;

case 11: // CCW, wait for B low while A is low
if (!rotAval)
{
if (!rotBval)
{
// either decrement radixindex or freq
if (digitalRead(pushPin) == LOW)
{
if (radix == 100)
radix = 1000;
else if (radix == 1000)
radix = 100;
}
else
{
freq = (freq - radix);
if (freq < bandStart)
freq = bandStart;
}
rotState = 12; // CCW 2
}
}
else if (rotBval)
rotState = 0; // It was just a glitch on A, go back to start
break;

case 12: // CCW, wait for A high
if (rotAval)
rotState = 13; // CCW 3
break;

case 13: // CCW, wait for B high
if (rotBval)
rotState = 0; // back to idle (detent) state
break;
}
}

void UpdateDisplay()
{
TensMHz = freq / 10000000; // TensMHz = 12345678 / 10000000 = 1
remainder = freq - (TensMHz * 10000000); // remainder = 12345678 - 10000000 = 2345678
OnesMHz = remainder / 1000000; // OnesMhz = 2345678 / 1000000 = 2
remainder = remainder - (OnesMHz * 1000000); // remainder = 2345678 - (2 * 1000000) = 345678
HundredskHz = remainder / 100000; // HundredskHz = 345678 / 100000 = 3
remainder = remainder - (HundredskHz * 100000); // remainder = 345678 - (3 * 100000) = 45678
TenskHz = remainder / 10000; // TenskHz = 45678 / 10000 = 4
remainder = remainder - (TenskHz * 10000); // remainder = 45678 - (4 * 10000) = 5678
OneskHz = remainder / 1000; // OneskHz = 5678 / 1000 = 5
remainder = remainder - (OneskHz * 1000); // remainder = 5678 - (5 * 1000) = 678
HundredsHz = remainder / 100; // HundredsHz = 678 / 100 = 6
remainder = remainder - (HundredsHz * 100); // remainder = 678 - (6 * 100) = 78
TensHz = remainder / 10; // TensHz = 78 / 10 = 7
remainder = remainder - (TensHz * 10); // remainder = 78 - (7 * 10) = 8
OnesHz = remainder; // OnesHz = 8

display.showNumberDec(((1000 * HundredskHz) + ( 100 * TenskHz) + (10 * OneskHz) + HundredsHz), true);
}

void SendFrequency()
{
if (currentmode == 1) // Transmit
{
si5351.set_freq(((freq - BFO_freq + 50) * 100ULL), SI5351_CLK2);
si5351.set_freq((BFO_freq * 100ULL), SI5351_CLK0);
}
else // Receive
{
si5351.set_freq(((freq - BFO_freq + 50) * 100ULL), SI5351_CLK0);
si5351.set_freq((BFO_freq * 100ULL), SI5351_CLK2);
}
}

Friday, 15 March 2019

Homebrew RF Power Amplifier

RF Power amplifier based on the W6JL amp. The intent is to use readily available parts in the first instant. These may be swapped out depending on how well they perform.

See YouTube for videos. https://www.youtube.com/channel/UCSNPW3_gzuMJcX_ErBZTv2g

The original circuit (minus the biasing RFCs)

My version of the bias network

The final amp has used a BN-43-202 for T1 (8:4) and a BN-43-3312 for T2 (1:3). I also left off the RFCs for the YouTube video. Adding the RFCs would increase the gain a little.

Friday, 8 March 2019

Homebrew Panadapter

Homebrew panadapter using a Teensy 3.5.

Test Code

#include "SPI.h"
#include "ILI9341_t3.h"
#include <si5351.h> // Si5351Jason library
#include <Audio.h>

//const int myInput = AUDIO_INPUT_MIC;
const int myInput = AUDIO_INPUT_LINEIN;

uint16_t WaterfallData[100][128] = {1};
int Gain = 50;

static const long bandInit = 9008450; // 8800000 8565000 to initially set the frequency. Was 9020000
volatile long freq = bandInit ;

// For optimized ILI9341_t3 library
#define TFT_DC 20
#define TFT_CS 21
#define TFT_RST 255 // 255 = unused, connect to 3.3V
#define TFT_MOSI 7
#define TFT_SCLK 14
#define TFT_MISO 12

ILI9341_t3 tft = ILI9341_t3(TFT_CS, TFT_DC, TFT_RST, TFT_MOSI, TFT_SCLK, TFT_MISO);
Si5351 si5351; // Name for the Si5351 DDS

// Setup audio shield
AudioInputI2S audioInput;
AudioMixer4 InputAmp;
AudioAnalyzeFFT256 FFT;

// Setup the audio connections
AudioConnection patchCord1(audioInput, 0, InputAmp, 0);
AudioConnection patchCord2(InputAmp, 0, FFT, 0);

// Instantiate the Audio Shield
AudioControlSGTL5000 audioShield;

void setup()
{
Serial.begin(9600);

// Setup screen
tft.begin();
tft.setRotation(1);
tft.fillScreen(ILI9341_BLACK);
tft.drawRect(31, 0, 257, 37, ILI9341_YELLOW);
tft.drawRect(31, 36, 257, 103, ILI9341_YELLOW);
tft.drawRect(31, 138, 257, 102, ILI9341_YELLOW);

// Setup audio shield.
AudioMemory(12);
audioShield.enable();
audioShield.inputSelect(myInput);
InputAmp.gain(0, Gain);
FFT.windowFunction(AudioWindowHanning256);
FFT.averageTogether(30);

// Setup the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK1, SI5351_DRIVE_8MA);
si5351.set_freq(freq * 100ULL, SI5351_CLK1);
}

void loop()
{
if (FFT.available())
UpdateDisplay();

if (Serial.available() > 0)
{
char c = Serial.read();
switch (c)
{
case 'w': Gain = Gain + 10; break;
case 's': Gain = Gain - 10; break;
}
Serial.println(Gain);
InputAmp.gain(0, Gain);
}
}

void UpdateDisplay()
{
int bar = 0;
int xPos = 0;
int low = 0;

// Spectrum
for (int x = 0; x <= 127; x++)
{
WaterfallData[0][x] = abs(FFT.output[x]);
bar = WaterfallData[0][x];
if (bar > 100)
bar = 100;
tft.drawFastVLine(32 + (xPos * 2), 138 - bar, bar, ILI9341_GREEN); //draw green bar
tft.drawFastVLine(32 + (xPos * 2), 38, 100 - bar, ILI9341_BLACK); //finish off with black to the top of the screen
xPos++;
}

// Waterfall
for (int row = 99; row >= 0; row--)
for (int col = 0; col <= 127; col++)
{
WaterfallData[row][col] = WaterfallData[row - 1][col];

if (WaterfallData[row][col] >= low + 75)
tft.drawPixel(32 + (col * 2), 139 + row, ILI9341_RED);

else if ((WaterfallData[row][col] >= low + 50) && (WaterfallData[row][col] < low + 75))
tft.drawPixel(32 + (col * 2), 139 + row, ILI9341_MAGENTA);

else if ((WaterfallData[row][col] >= low + 30) && (WaterfallData[row][col] < low + 50))
tft.drawPixel(32 + (col * 2), 139 + row, ILI9341_YELLOW);

else if ((WaterfallData[row][col] >= low + 20) && (WaterfallData[row][col] < low + 30))
tft.drawPixel(32 + (col * 2), 139 + row, ILI9341_BLUE);

else if (WaterfallData[row][col] < low + 20)
tft.drawPixel(32 + (col * 2), 139 + row, ILI9341_BLACK);
}
}

void SendFrequency()
{
si5351.set_freq(freq * 100ULL, SI5351_CLK1);
}