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#include <Wire.h> // I2C comms
#include "si5351.h" // Si5351 library
#include <arm_math.h> // Needed for float64_t
#include "ILI9341_t3.h"
#include <Audio.h>
#include "font_Arial.h"
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
#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);
// Define Constants and Variables
static const uint64_t BAND_START = 700000000ULL; // start of HF band
static const uint64_t BAND_END = 1400000000ULL; // end of HF band
static const uint64_t BAND_INIT = 720000000ULL; // where to initially set the frequency
static const uint64_t PLL_MIN = 60000000000ULL;
static const uint64_t PLL_MAX = 90000000000ULL;
volatile uint64_t oldfreq = 0;
volatile uint64_t freq = BAND_INIT ;
volatile long radix = 1000000; // how much to change the frequency by, clicking the rotary encoder will change this.
volatile int updatedisplay = 0;
uint64_t pll_freq;
int multiple;
// Rotary Encoder
static const int pushPin = 39;
static const int rotBPin = 37;
static const int rotAPin = 36;
volatile int rotState = 0;
volatile int rotAval = 1;
volatile int rotBval = 1;
volatile int rotAcc = 0;
// Instantiate the Objects
Si5351 si5351;
#define NUM_HILBERT_COEFFS 70
const short Hilbert_Plus_45_Coeffs[NUM_HILBERT_COEFFS] = {
(short)(32768 * 0.000026665388842506),
(short)(32768 * 0.000045350266683587),
(short)(32768 * 0.000049535194963343),
(short)(32768 * 0.000013929445802525),
(short)(32768 * -0.000089756932471845),
(short)(32768 * -0.000280899822020724),
(short)(32768 * -0.000554463834139723),
(short)(32768 * -0.000866732397801864),
(short)(32768 * -0.001128869571306335),
(short)(32768 * -0.001214793584591925),
(short)(32768 * -0.000987123427391450),
(short)(32768 * -0.000339739120777462),
(short)(32768 * 0.000751166835621107),
(short)(32768 * 0.002181855899770147),
(short)(32768 * 0.003699317878546329),
(short)(32768 * 0.004919290372383914),
(short)(32768 * 0.005393023804155144),
(short)(32768 * 0.004719490953542981),
(short)(32768 * 0.002684917857603390),
(short)(32768 * -0.000601873045713977),
(short)(32768 * -0.004617356732843290),
(short)(32768 * -0.008411605699112680),
(short)(32768 * -0.010701388680801362),
(short)(32768 * -0.010070233160010302),
(short)(32768 * -0.005250377124685787),
(short)(32768 * 0.004564114354746081),
(short)(32768 * 0.019440673287414619),
(short)(32768 * 0.038537923280388298),
(short)(32768 * 0.060096847866633052),
(short)(32768 * 0.081618252179492840),
(short)(32768 * 0.100211560649161716),
(short)(32768 * 0.113059746959379301),
(short)(32768 * 0.117914393674033696),
(short)(32768 * 0.113521768501838344),
(short)(32768 * 0.099889668870034684),
(short)(32768 * 0.078334626955959316),
(short)(32768 * 0.051293625327079304),
(short)(32768 * 0.021933662563154727),
(short)(32768 * -0.006365101806065199),
(short)(32768 * -0.030551195192096176),
(short)(32768 * -0.048364086483228520),
(short)(32768 * -0.058631997671255619),
(short)(32768 * -0.061357904565856151),
(short)(32768 * -0.057592344202841303),
(short)(32768 * -0.049135236893174006),
(short)(32768 * -0.038140342465779013),
(short)(32768 * -0.026708902650401732),
(short)(32768 * -0.016552007744391070),
(short)(32768 * -0.008777661819717671),
(short)(32768 * -0.003825446520437530),
(short)(32768 * -0.001537721831848443),
(short)(32768 * -0.001329366926757822),
(short)(32768 * -0.002403463761614129),
(short)(32768 * -0.003959730656157654),
(short)(32768 * -0.005353975172548658),
(short)(32768 * -0.006185747399762316),
(short)(32768 * -0.006311999590758985),
(short)(32768 * -0.005801655201517503),
(short)(32768 * -0.004856081867239870),
(short)(32768 * -0.003722447168239438),
(short)(32768 * -0.002621972625618343),
(short)(32768 * -0.001705906352533607),
(short)(32768 * -0.001041873927200467),
(short)(32768 * -0.000624975669045641),
(short)(32768 * -0.000403299387333375),
(short)(32768 * -0.000306778456517453),
(short)(32768 * -0.000270745067644623),
(short)(32768 * -0.000249620856480216),
(short)(32768 * -0.000220358422272639000),
(short)(32768 * -0.000178283990611435),
};
const short Hilbert_Minus_45_Coeffs[NUM_HILBERT_COEFFS] = {
(short)(32768 * -0.000178283990611436),
(short)(32768 * -0.000220358422272644),
(short)(32768 * -0.000249620856480226),
(short)(32768 * -0.000270745067644634),
(short)(32768 * -0.000306778456517456),
(short)(32768 * -0.000403299387333353),
(short)(32768 * -0.000624975669045577),
(short)(32768 * -0.001041873927200345),
(short)(32768 * -0.001705906352533420),
(short)(32768 * -0.002621972625618107),
(short)(32768 * -0.003722447168239188),
(short)(32768 * -0.004856081867239669),
(short)(32768 * -0.005801655201517424),
(short)(32768 * -0.006311999590759096),
(short)(32768 * -0.006185747399762651),
(short)(32768 * -0.005353975172549197),
(short)(32768 * -0.003959730656158292),
(short)(32768 * -0.002403463761614686),
(short)(32768 * -0.001329366926758052),
(short)(32768 * -0.001537721831848083),
(short)(32768 * -0.003825446520436358),
(short)(32768 * -0.008777661819715581),
(short)(32768 * -0.016552007744388125),
(short)(32768 * -0.026708902650398218),
(short)(32768 * -0.038140342465775433),
(short)(32768 * -0.049135236893170994),
(short)(32768 * -0.057592344202839631),
(short)(32768 * -0.061357904565856464),
(short)(32768 * -0.058631997671258360),
(short)(32768 * -0.048364086483233870),
(short)(32768 * -0.030551195192103930),
(short)(32768 * -0.006365101806074743),
(short)(32768 * 0.021933662563144312),
(short)(32768 * 0.051293625327069131),
(short)(32768 * 0.078334626955950518),
(short)(32768 * 0.099889668870028217),
(short)(32768 * 0.113521768501834860),
(short)(32768 * 0.117914393674033446),
(short)(32768 * 0.113059746959382076),
(short)(32768 * 0.100211560649166906),
(short)(32768 * 0.081618252179499598),
(short)(32768 * 0.060096847866640407),
(short)(32768 * 0.038537923280395278),
(short)(32768 * 0.019440673287420517),
(short)(32768 * 0.004564114354750423),
(short)(32768 * -0.005250377124683159),
(short)(32768 * -0.010070233160009257),
(short)(32768 * -0.010701388680801569),
(short)(32768 * -0.008411605699113688),
(short)(32768 * -0.004617356732844640),
(short)(32768 * -0.000601873045715285),
(short)(32768 * 0.002684917857602387),
(short)(32768 * 0.004719490953542407),
(short)(32768 * 0.005393023804154996),
(short)(32768 * 0.004919290372384100),
(short)(32768 * 0.003699317878546716),
(short)(32768 * 0.002181855899770600),
(short)(32768 * 0.000751166835621515),
(short)(32768 * -0.000339739120777163),
(short)(32768 * -0.000987123427391280),
(short)(32768 * -0.001214793584591868),
(short)(32768 * -0.001128869571306359),
(short)(32768 * -0.000866732397801929),
(short)(32768 * -0.000554463834139796),
(short)(32768 * -0.000280899822020784),
(short)(32768 * -0.000089756932471884),
(short)(32768 * 0.000013929445802507),
(short)(32768 * 0.000049535194963339),
(short)(32768 * 0.000045350266683589),
(short)(32768 * 0.000026665388842510),
};
AudioInputI2S audioInput;
AudioOutputI2S audioOutput;
AudioAnalyzeFFT1024 FFT;
//AudioFilterBiquad LPF_2800;
AudioFilterFIR RX_Hilbert_Plus_45;
AudioFilterFIR RX_Hilbert_Minus_45;
AudioMixer4 RX_Summer;
AudioConnection patchCord10(audioInput, 0, RX_Hilbert_Plus_45, 0);
AudioConnection patchCord11(audioInput, 1, RX_Hilbert_Minus_45, 0);
AudioConnection patchCord20(RX_Hilbert_Plus_45, 0, RX_Summer, 0);
AudioConnection patchCord21(RX_Hilbert_Minus_45, 0, RX_Summer, 1);
AudioConnection patchCord22(RX_Summer, 0, FFT, 0);
AudioConnection patchCord98(RX_Summer, 0, audioOutput, 0);
AudioConnection patchCord99(RX_Summer, 0, audioOutput, 1);
AudioControlSGTL5000 audioShield;
void setup()
{
delay(1000);
// Set up input switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(pushPin, INPUT);
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(pushPin, HIGH);
// Set up interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);
// Initialise the lcd
tft.begin();
tft.setRotation(1);
tft.fillScreen(ILI9341_BLACK);
// Initialise the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
GetPLLFreq();
si5351.set_pll(pll_freq, SI5351_PLLA);
si5351.set_ms_source(SI5351_CLK0, SI5351_PLLA);
si5351.set_ms_source(SI5351_CLK1, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_2MA);
si5351.drive_strength(SI5351_CLK1, SI5351_DRIVE_2MA);
si5351.set_freq_manual(freq, pll_freq, SI5351_CLK0);
si5351.set_freq_manual(freq, pll_freq, SI5351_CLK1);
si5351.set_phase(SI5351_CLK0, 0);
si5351.set_phase(SI5351_CLK1, multiple);
si5351.pll_reset(SI5351_PLLA);
AudioMemory(16);
AudioNoInterrupts();
audioShield.enable();
//audioShield.adcHighPassFilterDisable(); // cuts out that squeal/whine
audioShield.inputSelect(AUDIO_INPUT_LINEIN);
audioShield.lineInLevel(5);
audioShield.volume(0.8);
audioShield.unmuteHeadphone();
RX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NUM_HILBERT_COEFFS);
RX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NUM_HILBERT_COEFFS);
RX_Summer.gain(0, 40);
RX_Summer.gain(1, 40);
FFT.windowFunction(AudioWindowHanning1024);
AudioInterrupts();
UpdateDisplay();
}
void loop()
{
if (freq != oldfreq)
{
SendFrequency();
oldfreq = freq;
}
UpdateDisplay();
}
// 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)
{
updatedisplay = 1;
if (radix == 100000000)
radix = 10000000;
else if (radix == 10000000)
radix = 1000000;
else if (radix == 1000000)
radix = 100000;
else if (radix == 100000)
radix = 10000;
else if (radix == 10000)
radix = 1000;
else if (radix == 1000)
radix = 100;
else
radix = 100000000;
}
else
{
freq = (freq + radix);
if (freq > BAND_END)
freq = BAND_END;
}
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)
{
updatedisplay = 1;
if (radix == 100)
radix = 1000;
else if (radix == 1000)
radix = 10000;
else if (radix == 10000)
radix = 100000;
else if (radix == 100000)
radix = 1000000;
else if (radix == 1000000)
radix = 10000000;
else if (radix == 10000000)
radix = 100000000;
else
radix = 100;
}
else
{
freq = (freq - radix);
if (freq < BAND_START)
freq = BAND_START;
}
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()
{
char freq_disp[7];
sprintf(freq_disp, "%llu", (freq / 100));
int font_width = 30;
//tft.setCursor(0, 1);
// if using free font, then setTextColor wont redraw background
//tft.setFont(Arial_40);
tft.setTextSize(5);
for ( int i = 0; i < 7; i++ ) {
tft.setCursor(font_width * i, 1);
tft.setTextColor(ILI9341_GREEN, ILI9341_BLACK);
if (i == 0 && radix == 100000000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 1 && radix == 10000000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 2 && radix == 1000000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 3 && radix == 100000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 4 && radix == 10000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 5 && radix == 1000)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
if (i == 6 && radix == 100)
tft.setTextColor(ILI9341_RED, ILI9341_BLACK);
tft.print(freq_disp[i]);
}
if (FFT.available()) {
int fft_x_min = 240; // bottom of fft line
int fft_x_max = 90; //140; // top of fft line
int scale = 511 / (fft_x_min - fft_x_max); // 3;
int x_pos = 0;
int bin_no = 0;
uint16_t fft_color = ILI9341_CYAN;
uint16_t fft_bg_color = ILI9341_BLACK;
for (bin_no = 0; bin_no < 511; bin_no = bin_no + 2) {
int bar = abs(FFT.output[bin_no]) / scale;
if (bar > (fft_x_min - fft_x_max)) {
bar = (fft_x_min - fft_x_max);
}
// 240 = fft x min
// 140 = fft x max
// 240 - height of bar = top of line
if (x_pos != 159 && x_pos != 160) {
// x, y, h, color
tft.drawFastVLine(x_pos, fft_x_min - bar, bar, fft_color);
tft.drawFastVLine(x_pos + 1, fft_x_min - bar, bar, fft_color);
tft.drawFastVLine(x_pos, fft_x_max, abs(fft_x_max - (fft_x_min - bar)), fft_bg_color);
tft.drawFastVLine(x_pos + 1, fft_x_max , abs(fft_x_max - (fft_x_min - bar)), fft_bg_color);
}
tft.drawFastHLine(0, fft_x_max, 320, ILI9341_YELLOW);
tft.drawFastVLine(160, fft_x_max, 150, ILI9341_YELLOW);
x_pos = x_pos + 4;
}
}
}
void GetPLLFreq() {
float64_t f_pll_freq; // floating point pll_freq
for (int i = 10; i <= 200; i = i + 2) { // loop through even numbers from 10 to 200
f_pll_freq = freq * i; // set f_pll_freq
if (f_pll_freq >= PLL_MIN) { //
if (f_pll_freq <= PLL_MAX) { // if f_pll_freq between PLL_MIN & PLL_MAX
if (f_pll_freq == floor(f_pll_freq)) { // if f_pll_freq is a whole integer
pll_freq = f_pll_freq; // set pll_freq = f_pll_freq
multiple = pll_freq/freq; // set multiple
break; // exit loop & function
}
}
}
}
}
void SendFrequency()
{
GetPLLFreq();
si5351.set_pll(pll_freq, SI5351_PLLA); // set pll frequency
si5351.set_freq_manual(freq, pll_freq, SI5351_CLK0); // manually set clock frequency and pll frequency for CLK0
si5351.set_freq_manual(freq, pll_freq, SI5351_CLK1); // manually set clock frequency and pll frequency for CLK1
si5351.set_phase(SI5351_CLK0, 0); // set CLK0 phase to 0
si5351.set_phase(SI5351_CLK1, multiple); // set CLK1 phase to multiple for 90 degree phase shift
si5351.pll_reset(SI5351_PLLA); // reset pll to lock in phase alignment
}
```
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