Code. This will be updated as additional SDR DSP functions are added.
#include <Wire.h> // I2C comms
#include <si5351.h> // Si5351 library
#include <LiquidCrystal_I2C.h> // LCD library
// 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 by, clicking the rotary encoder will change this.
volatile int updatedisplay = 0;
// Rotary Encoder
static const int pushPin = 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;
// Instantiate the Objects
LiquidCrystal_I2C lcd(0x3F, 16, 2); // set the LCD address to either 0x27 or 0x3F for a 16 chars and 2 line display
Si5351 si5351;
void setup()
{
// 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
lcd.begin();
lcd.backlight();
// Initialise the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.set_freq((freq * 100ULL), SI5351_PLL_FIXED, SI5351_CLK0);
UpdateDisplay();
}
void loop()
{
if (freq != oldfreq)
{
UpdateDisplay();
SendFrequency();
oldfreq = freq;
}
if (digitalRead(pushPin) == LOW)
{
delay(10);
while (digitalRead(pushPin) == LOW)
{
if (updatedisplay == 1)
{
UpdateDisplay();
updatedisplay = 0;
}
}
delay(50);
}
}
// 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 == 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(pushPin) == 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()
{
lcd.cursor(); // Turn on the cursor
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(freq);
lcd.setCursor(10, 0);
lcd.print("ZL2CTM");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
if (freq > 9999999)
{
if (radix == 1)
lcd.setCursor(7, 0);
if (radix == 10)
lcd.setCursor(6, 0);
if (radix == 100)
lcd.setCursor(5, 0);
if (radix == 1000)
lcd.setCursor(4, 0);
if (radix == 10000)
lcd.setCursor(3, 0);
if (radix == 100000)
lcd.setCursor(2, 0);
if (radix == 1000000)
lcd.setCursor(1, 0);
}
if (freq <= 9999999)
{
if (radix == 1)
lcd.setCursor(6, 0);
if (radix == 10)
lcd.setCursor(5, 0);
if (radix == 100)
lcd.setCursor(4, 0);
if (radix == 1000)
lcd.setCursor(3, 0);
if (radix == 10000)
lcd.setCursor(2, 0);
if (radix == 100000)
lcd.setCursor(1, 0);
if (radix == 1000000)
lcd.setCursor(0, 0);
}
}
void SendFrequency()
{
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
}
*****************************************************************************
Dual Quadrature NE612 Direct Conversion Front End
Antenna RF Amplifier
Please note the collector inductor below is 1mH NOT 1uH
80m/20m Bandpass Filter
Audio Pass-through Test Code
#include <Wire.h> // I2C comms
#include <si5351.h> // Si5351 library
#include <LiquidCrystal_I2C.h> // LCD library
#include <Audio.h> // Teensy audio library
// 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 by, clicking the rotary encoder will change this.
volatile int updatedisplay = 0;
// Rotary Encoder
static const int pushPin = 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;
// Instantiate the Objects
LiquidCrystal_I2C lcd(0x3F, 16, 2); // Set the LCD address to either 0x27 or 0x3F for a 16 chars and 2 line display
Si5351 si5351; // The Si5351 DDS
AudioControlSGTL5000 audioShield; // The Teensy audio CODEC on the audio shield
// Audio shield
AudioInputI2S audioInput; // What we call the input to the audio shield
AudioOutputI2S audioOutput; // What we call the output of the audio shield
AudioConnection patchCord5(audioInput, 0, audioOutput, 0); // Left channel in to left channel out
AudioConnection patchCord10(audioInput, 1, audioOutput, 1); // Right channel in to right channel out
void setup()
{
// Setup input switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(pushPin, INPUT);
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(pushPin, HIGH);
// Setup interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);
// Setup the lcd
lcd.begin();
lcd.backlight();
// Setup the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.set_freq((freq * 100ULL), SI5351_PLL_FIXED, SI5351_CLK0);
// Setup the audio shield
AudioNoInterrupts();
AudioMemory(16);
audioShield.enable();
audioShield.inputSelect(AUDIO_INPUT_LINEIN);
audioShield.volume(0.7);
audioShield.unmuteLineout();
AudioInterrupts();
UpdateDisplay();
}
void loop()
{
if (freq != oldfreq)
{
UpdateDisplay();
SendFrequency();
oldfreq = freq;
}
if (digitalRead(pushPin) == LOW)
{
delay(10);
while (digitalRead(pushPin) == LOW)
{
if (updatedisplay == 1)
{
UpdateDisplay();
updatedisplay = 0;
}
}
delay(50);
}
}
// 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 == 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(pushPin) == 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()
{
lcd.cursor(); // Turn on the cursor
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(freq);
lcd.setCursor(10, 0);
lcd.print("ZL2CTM");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
if (freq > 9999999)
{
if (radix == 1)
lcd.setCursor(7, 0);
if (radix == 10)
lcd.setCursor(6, 0);
if (radix == 100)
lcd.setCursor(5, 0);
if (radix == 1000)
lcd.setCursor(4, 0);
if (radix == 10000)
lcd.setCursor(3, 0);
if (radix == 100000)
lcd.setCursor(2, 0);
if (radix == 1000000)
lcd.setCursor(1, 0);
}
if (freq <= 9999999)
{
if (radix == 1)
lcd.setCursor(6, 0);
if (radix == 10)
lcd.setCursor(5, 0);
if (radix == 100)
lcd.setCursor(4, 0);
if (radix == 1000)
lcd.setCursor(3, 0);
if (radix == 10000)
lcd.setCursor(2, 0);
if (radix == 100000)
lcd.setCursor(1, 0);
if (radix == 1000000)
lcd.setCursor(0, 0);
}
}
void SendFrequency()
{
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
}
************************************************************************
AF Amplifier
Note. In the schematic below the audio output is from Pin 5 on the NE612, NOT 6 or 9.
Receive Test CodeNote. In the schematic below the audio output is from Pin 5 on the NE612, NOT 6 or 9.
// Libraries
#include <Wire.h> // I2C comms library
#include <si5351.h> // Si5351Jason library
#include <LiquidCrystal_I2C.h> // LCD library
#include <Audio.h> // Teensy audio library
// Number of Filter Coefficients
#define NO_HILBERT_COEFFS 70 // 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 by clicking the rotary encoder will change this.
volatile int updatedisplay = 0;
// Rotary Encoder
static const int pushPin = 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;
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Plus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000287988910943357),
(short)(32768 * -0.000383511439791303),
(short)(32768 * -0.000468041804899774),
(short)(32768 * -0.000529324432676899),
(short)(32768 * -0.000569479602046985),
(short)(32768 * -0.000616670267768531),
(short)(32768 * -0.000731530748681977),
(short)(32768 * -0.001002372095321225),
(short)(32768 * -0.001525299390682192),
(short)(32768 * -0.002370114347025230),
(short)(32768 * -0.003539247773172147),
(short)(32768 * -0.004932965382552984),
(short)(32768 * -0.006337182914262393),
(short)(32768 * -0.007448193692118567),
(short)(32768 * -0.007940501940620482),
(short)(32768 * -0.007570802072162988),
(short)(32768 * -0.006296120449841751),
(short)(32768 * -0.004371955618154949),
(short)(32768 * -0.002391875073164555),
(short)(32768 * -0.001236984700413469),
(short)(32768 * -0.001922560128827416),
(short)(32768 * -0.005356720327533458),
(short)(32768 * -0.012055656297010635),
(short)(32768 * -0.021882952959947619),
(short)(32768 * -0.033888748300090733),
(short)(32768 * -0.046312736456333638),
(short)(32768 * -0.056783367797647665),
(short)(32768 * -0.062699937453677912),
(short)(32768 * -0.061735375084135742),
(short)(32768 * -0.052358513976237808),
(short)(32768 * -0.034257179158167443),
(short)(32768 * -0.008554500746482946),
(short)(32768 * 0.022249911747384360),
(short)(32768 * 0.054622962942346594),
(short)(32768 * 0.084568844473140448),
(short)(32768 * 0.108316122839950818),
(short)(32768 * 0.122979341462627859),
(short)(32768 * 0.127056096658453188),
(short)(32768 * 0.120656295327679283),
(short)(32768 * 0.105420364259485699),
(short)(32768 * 0.084152608145489444),
(short)(32768 * 0.060257510644444748),
(short)(32768 * 0.037105711921879434),
(short)(32768 * 0.017464092086704748),
(short)(32768 * 0.003100559033325746),
(short)(32768 * -0.005373489802481697),
(short)(32768 * -0.008418211280310166),
(short)(32768 * -0.007286730644726664),
(short)(32768 * -0.003638388931163832),
(short)(32768 * 0.000858330713630433),
(short)(32768 * 0.004847436504682235),
(short)(32768 * 0.007476399317750315),
(short)(32768 * 0.008440227567663121),
(short)(32768 * 0.007898970420636600),
(short)(32768 * 0.006314366257036837),
(short)(32768 * 0.004261033495040515),
(short)(32768 * 0.002261843500794377),
(short)(32768 * 0.000680212977485724),
(short)(32768 * -0.000319493110301691),
(short)(32768 * -0.000751893569425181),
(short)(32768 * -0.000752248417868501),
(short)(32768 * -0.000505487955986662),
(short)(32768 * -0.000184645628631330),
(short)(32768 * 0.000087913008490067),
(short)(32768 * 0.000253106348867209),
(short)(32768 * 0.000306473486382603),
(short)(32768 * 0.000277637042003169),
(short)(32768 * 0.000207782317481292),
(short)(32768 * 0.000132446796990356),
(short)(32768 * 0.000072894261560354)
};
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Minus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000072894261560345),
(short)(32768 * -0.000132446796990344),
(short)(32768 * -0.000207782317481281),
(short)(32768 * -0.000277637042003168),
(short)(32768 * -0.000306473486382623),
(short)(32768 * -0.000253106348867259),
(short)(32768 * -0.000087913008490148),
(short)(32768 * 0.000184645628631233),
(short)(32768 * 0.000505487955986583),
(short)(32768 * 0.000752248417868491),
(short)(32768 * 0.000751893569425298),
(short)(32768 * 0.000319493110301983),
(short)(32768 * -0.000680212977485245),
(short)(32768 * -0.002261843500793748),
(short)(32768 * -0.004261033495039842),
(short)(32768 * -0.006314366257036280),
(short)(32768 * -0.007898970420636345),
(short)(32768 * -0.008440227567663343),
(short)(32768 * -0.007476399317751102),
(short)(32768 * -0.004847436504683540),
(short)(32768 * -0.000858330713632029),
(short)(32768 * 0.003638388931162351),
(short)(32768 * 0.007286730644725833),
(short)(32768 * 0.008418211280310565),
(short)(32768 * 0.005373489802483816),
(short)(32768 * -0.003100559033321630),
(short)(32768 * -0.017464092086698697),
(short)(32768 * -0.037105711921871905),
(short)(32768 * -0.060257510644436532),
(short)(32768 * -0.084152608145481672),
(short)(32768 * -0.105420364259479538),
(short)(32768 * -0.120656295327675800),
(short)(32768 * -0.127056096658453216),
(short)(32768 * -0.122979341462631633),
(short)(32768 * -0.108316122839958146),
(short)(32768 * -0.084568844473150454),
(short)(32768 * -0.054622962942358168),
(short)(32768 * -0.022249911747396132),
(short)(32768 * 0.008554500746472333),
(short)(32768 * 0.034257179158159054),
(short)(32768 * 0.052358513976232306),
(short)(32768 * 0.061735375084133286),
(short)(32768 * 0.062699937453678217),
(short)(32768 * 0.056783367797650072),
(short)(32768 * 0.046312736456337288),
(short)(32768 * 0.033888748300094730),
(short)(32768 * 0.021882952959951244),
(short)(32768 * 0.012055656297013388),
(short)(32768 * 0.005356720327535105),
(short)(32768 * 0.001922560128828006),
(short)(32768 * 0.001236984700413229),
(short)(32768 * 0.002391875073163812),
(short)(32768 * 0.004371955618154038),
(short)(32768 * 0.006296120449840938),
(short)(32768 * 0.007570802072162439),
(short)(32768 * 0.007940501940620253),
(short)(32768 * 0.007448193692118624),
(short)(32768 * 0.006337182914262643),
(short)(32768 * 0.004932965382553323),
(short)(32768 * 0.003539247773172483),
(short)(32768 * 0.002370114347025498),
(short)(32768 * 0.001525299390682370),
(short)(32768 * 0.001002372095321316),
(short)(32768 * 0.000731530748682004),
(short)(32768 * 0.000616670267768521),
(short)(32768 * 0.000569479602046963),
(short)(32768 * 0.000529324432676881),
(short)(32768 * 0.000468041804899765),
(short)(32768 * 0.000383511439791304),
(short)(32768 * 0.000287988910943362)
};
// Instantiate the Objects
LiquidCrystal_I2C lcd(0x3F, 16, 2); // Name for the LCD. Set the LCD address to either 0x27 or 0x3F for a 16 chars and 2 line display
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
AudioOutputI2S audioOutput; // Name for the output of the audio shield
// 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); // Receiver summer to receiver LPF
void setup()
{
// Setup input switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(pushPin, INPUT);
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(pushPin, HIGH);
// Setup interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);
// Setup the lcd
lcd.begin();
lcd.backlight();
// Setup the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.set_freq((freq * 100ULL), SI5351_PLL_FIXED, SI5351_CLK0);
// Setup the audio shield
AudioNoInterrupts();
AudioMemory(16);
audioShield.enable();
audioShield.volume(0.7); // Constant. Use external volume control on the audio amp
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.
{
UpdateDisplay();
SendFrequency();
oldfreq = freq;
}
if (digitalRead(pushPin) == LOW) // Update cursor, but also stop it from flickering
{
delay(10);
while (digitalRead(pushPin) == LOW)
{
if (updatedisplay == 1)
{
UpdateDisplay();
updatedisplay = 0;
}
}
delay(50);
}
}
void Turn_On_Receiver()
{
AudioNoInterrupts();
audioShield.inputSelect(AUDIO_INPUT_LINEIN);
audioShield.lineInLevel(5); // Default is 5
audioShield.unmuteHeadphone();
RX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NO_HILBERT_COEFFS);
RX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NO_HILBERT_COEFFS);
if (freq <= 9999999) // LSB
{
RX_Summer.gain(0, 1);
RX_Summer.gain(1, -1);
}
if (freq > 9999999) // USB
{
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(pushPin) == 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(pushPin) == 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()
{
lcd.cursor(); // Turn on the cursor
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(freq);
lcd.setCursor(10, 0);
lcd.print("ZL2CTM");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
if (freq > 9999999)
{
if (radix == 1)
lcd.setCursor(7, 0);
if (radix == 10)
lcd.setCursor(6, 0);
if (radix == 100)
lcd.setCursor(5, 0);
if (radix == 1000)
lcd.setCursor(4, 0);
if (radix == 10000)
lcd.setCursor(3, 0);
if (radix == 100000)
lcd.setCursor(2, 0);
if (radix == 1000000)
lcd.setCursor(1, 0);
}
if (freq <= 9999999)
{
if (radix == 1)
lcd.setCursor(6, 0);
if (radix == 10)
lcd.setCursor(5, 0);
if (radix == 100)
lcd.setCursor(4, 0);
if (radix == 1000)
lcd.setCursor(3, 0);
if (radix == 10000)
lcd.setCursor(2, 0);
if (radix == 100000)
lcd.setCursor(1, 0);
if (radix == 1000000)
lcd.setCursor(0, 0);
}
}
void SendFrequency()
{
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
}
***************************************************************
Transmit Test Configuration
Transmit Test Code
Note, the formatting has been messed up from cutting and pasting. Use auto format after pasting into the Arduino IDE)
// Libraries
#include <Wire.h> // I2C comms library
#include <si5351.h> // Si5351Jason library
#include <LiquidCrystal_I2C.h> // LCD library
#include <Audio.h> // Teensy audio library
// Number of Filter Coefficients
#define NO_HILBERT_COEFFS 70 // 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
//static const long bandInit = 14190000; // where to initially set the frequency
volatile long oldfreq = 0;
volatile long freq = bandInit ;
volatile long radix = 1000; // how much to change the frequency by clicking the rotary encoder will change this.
volatile int updatedisplay = 0;
static const int Mic_Gain = 0; // Range is 0-63dB.
static const int Lineout_Gain = 20; // Range is 13-31. 13 = 3.16 Vp-p, 31 = 1.16 Vp-p
// Rotary Encoder
static const int pushPin = 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;
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Plus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000287988910943357),
(short)(32768 * -0.000383511439791303),
(short)(32768 * -0.000468041804899774),
(short)(32768 * -0.000529324432676899),
(short)(32768 * -0.000569479602046985),
(short)(32768 * -0.000616670267768531),
(short)(32768 * -0.000731530748681977),
(short)(32768 * -0.001002372095321225),
(short)(32768 * -0.001525299390682192),
(short)(32768 * -0.002370114347025230),
(short)(32768 * -0.003539247773172147),
(short)(32768 * -0.004932965382552984),
(short)(32768 * -0.006337182914262393),
(short)(32768 * -0.007448193692118567),
(short)(32768 * -0.007940501940620482),
(short)(32768 * -0.007570802072162988),
(short)(32768 * -0.006296120449841751),
(short)(32768 * -0.004371955618154949),
(short)(32768 * -0.002391875073164555),
(short)(32768 * -0.001236984700413469),
(short)(32768 * -0.001922560128827416),
(short)(32768 * -0.005356720327533458),
(short)(32768 * -0.012055656297010635),
(short)(32768 * -0.021882952959947619),
(short)(32768 * -0.033888748300090733),
(short)(32768 * -0.046312736456333638),
(short)(32768 * -0.056783367797647665),
(short)(32768 * -0.062699937453677912),
(short)(32768 * -0.061735375084135742),
(short)(32768 * -0.052358513976237808),
(short)(32768 * -0.034257179158167443),
(short)(32768 * -0.008554500746482946),
(short)(32768 * 0.022249911747384360),
(short)(32768 * 0.054622962942346594),
(short)(32768 * 0.084568844473140448),
(short)(32768 * 0.108316122839950818),
(short)(32768 * 0.122979341462627859),
(short)(32768 * 0.127056096658453188),
(short)(32768 * 0.120656295327679283),
(short)(32768 * 0.105420364259485699),
(short)(32768 * 0.084152608145489444),
(short)(32768 * 0.060257510644444748),
(short)(32768 * 0.037105711921879434),
(short)(32768 * 0.017464092086704748),
(short)(32768 * 0.003100559033325746),
(short)(32768 * -0.005373489802481697),
(short)(32768 * -0.008418211280310166),
(short)(32768 * -0.007286730644726664),
(short)(32768 * -0.003638388931163832),
(short)(32768 * 0.000858330713630433),
(short)(32768 * 0.004847436504682235),
(short)(32768 * 0.007476399317750315),
(short)(32768 * 0.008440227567663121),
(short)(32768 * 0.007898970420636600),
(short)(32768 * 0.006314366257036837),
(short)(32768 * 0.004261033495040515),
(short)(32768 * 0.002261843500794377),
(short)(32768 * 0.000680212977485724),
(short)(32768 * -0.000319493110301691),
(short)(32768 * -0.000751893569425181),
(short)(32768 * -0.000752248417868501),
(short)(32768 * -0.000505487955986662),
(short)(32768 * -0.000184645628631330),
(short)(32768 * 0.000087913008490067),
(short)(32768 * 0.000253106348867209),
(short)(32768 * 0.000306473486382603),
(short)(32768 * 0.000277637042003169),
(short)(32768 * 0.000207782317481292),
(short)(32768 * 0.000132446796990356),
(short)(32768 * 0.000072894261560354)
};
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Minus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000072894261560345),
(short)(32768 * -0.000132446796990344),
(short)(32768 * -0.000207782317481281),
(short)(32768 * -0.000277637042003168),
(short)(32768 * -0.000306473486382623),
(short)(32768 * -0.000253106348867259),
(short)(32768 * -0.000087913008490148),
(short)(32768 * 0.000184645628631233),
(short)(32768 * 0.000505487955986583),
(short)(32768 * 0.000752248417868491),
(short)(32768 * 0.000751893569425298),
(short)(32768 * 0.000319493110301983),
(short)(32768 * -0.000680212977485245),
(short)(32768 * -0.002261843500793748),
(short)(32768 * -0.004261033495039842),
(short)(32768 * -0.006314366257036280),
(short)(32768 * -0.007898970420636345),
(short)(32768 * -0.008440227567663343),
(short)(32768 * -0.007476399317751102),
(short)(32768 * -0.004847436504683540),
(short)(32768 * -0.000858330713632029),
(short)(32768 * 0.003638388931162351),
(short)(32768 * 0.007286730644725833),
(short)(32768 * 0.008418211280310565),
(short)(32768 * 0.005373489802483816),
(short)(32768 * -0.003100559033321630),
(short)(32768 * -0.017464092086698697),
(short)(32768 * -0.037105711921871905),
(short)(32768 * -0.060257510644436532),
(short)(32768 * -0.084152608145481672),
(short)(32768 * -0.105420364259479538),
(short)(32768 * -0.120656295327675800),
(short)(32768 * -0.127056096658453216),
(short)(32768 * -0.122979341462631633),
(short)(32768 * -0.108316122839958146),
(short)(32768 * -0.084568844473150454),
(short)(32768 * -0.054622962942358168),
(short)(32768 * -0.022249911747396132),
(short)(32768 * 0.008554500746472333),
(short)(32768 * 0.034257179158159054),
(short)(32768 * 0.052358513976232306),
(short)(32768 * 0.061735375084133286),
(short)(32768 * 0.062699937453678217),
(short)(32768 * 0.056783367797650072),
(short)(32768 * 0.046312736456337288),
(short)(32768 * 0.033888748300094730),
(short)(32768 * 0.021882952959951244),
(short)(32768 * 0.012055656297013388),
(short)(32768 * 0.005356720327535105),
(short)(32768 * 0.001922560128828006),
(short)(32768 * 0.001236984700413229),
(short)(32768 * 0.002391875073163812),
(short)(32768 * 0.004371955618154038),
(short)(32768 * 0.006296120449840938),
(short)(32768 * 0.007570802072162439),
(short)(32768 * 0.007940501940620253),
(short)(32768 * 0.007448193692118624),
(short)(32768 * 0.006337182914262643),
(short)(32768 * 0.004932965382553323),
(short)(32768 * 0.003539247773172483),
(short)(32768 * 0.002370114347025498),
(short)(32768 * 0.001525299390682370),
(short)(32768 * 0.001002372095321316),
(short)(32768 * 0.000731530748682004),
(short)(32768 * 0.000616670267768521),
(short)(32768 * 0.000569479602046963),
(short)(32768 * 0.000529324432676881),
(short)(32768 * 0.000468041804899765),
(short)(32768 * 0.000383511439791304),
(short)(32768 * 0.000287988910943362)
};
// Instantiate the Objects
LiquidCrystal_I2C lcd(0x3F, 16, 2); // Name for the LCD. Set the LCD address to either 0x27 or 0x3F for a 16 chars and 2 line display
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)
// 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 connections
AudioConnection patchCord50(audioInput, 0, TX_Hilbert_Plus_45, 0); // Mic audio to Hilbert transform +45
AudioConnection patchCord55(audioInput, 0, TX_Hilbert_Minus_45, 0); // Mic audio to Hilbert transform -45
AudioConnection patchCord60(TX_Hilbert_Plus_45, 0, TX_I_Sideband_Switch, 0); // Hilbert transform +45 to receiver summer
AudioConnection patchCord65(TX_I_Sideband_Switch, 0, audioOutput, 0); // Output to the NE612
AudioConnection patchCord70(TX_Hilbert_Minus_45, 0, audioOutput, 1); // Output to the NE612
void setup()
{
// Setup input switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(pushPin, INPUT);
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(pushPin, HIGH);
// Setup interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);
// Setup the lcd
lcd.begin();
lcd.backlight();
// Setup the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.set_freq((freq * 100ULL), SI5351_PLL_FIXED, SI5351_CLK0);
// Setup the audio shield
AudioNoInterrupts();
AudioMemory(16);
audioShield.enable();
AudioInterrupts();
// Setup transceiver mode
Turn_On_Transmitter();
UpdateDisplay();
}
void loop()
{
if (freq != oldfreq) // Check to see if the frequency has changed. If so, update everything.
{
UpdateDisplay();
SendFrequency();
oldfreq = freq;
}
if (digitalRead(pushPin) == LOW) // Update cursor, but also stop it from flickering
{
delay(10);
while (digitalRead(pushPin) == LOW)
{
if (updatedisplay == 1)
{
UpdateDisplay();
updatedisplay = 0;
}
}
delay(50);
}
}
void Turn_On_Transmitter()
{
AudioNoInterrupts();
audioShield.inputSelect(AUDIO_INPUT_MIC);
audioShield.micGain(Mic_Gain);
audioShield.unmuteLineout(); // Output to the NE612s
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);
if (freq <= 9999999) // LSB
{
TX_I_Sideband_Switch.gain(0, 1);
}
if (freq > 9999999) // USB
{
TX_I_Sideband_Switch.gain(0, -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(pushPin) == 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(pushPin) == 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()
{
lcd.cursor(); // Turn on the cursor
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(freq);
lcd.setCursor(10, 0);
lcd.print("ZL2CTM");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
if (freq > 9999999)
{
if (radix == 1)
lcd.setCursor(7, 0);
if (radix == 10)
lcd.setCursor(6, 0);
if (radix == 100)
lcd.setCursor(5, 0);
if (radix == 1000)
lcd.setCursor(4, 0);
if (radix == 10000)
lcd.setCursor(3, 0);
if (radix == 100000)
lcd.setCursor(2, 0);
if (radix == 1000000)
lcd.setCursor(1, 0);
}
if (freq <= 9999999)
{
if (radix == 1)
lcd.setCursor(6, 0);
if (radix == 10)
lcd.setCursor(5, 0);
if (radix == 100)
lcd.setCursor(4, 0);
if (radix == 1000)
lcd.setCursor(3, 0);
if (radix == 10000)
lcd.setCursor(2, 0);
if (radix == 100000)
lcd.setCursor(1, 0);
if (radix == 1000000)
lcd.setCursor(0, 0);
}
}
void SendFrequency()
{
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
}
****************************************************************
Final Code (as is).
// Libraries
#include <Wire.h> // I2C comms library
#include <si5351.h> // Si5351Jason library
#include <LiquidCrystal_I2C.h> // LCD library
#include <Audio.h> // Teensy audio library
// Number of Filter Coefficients
#define NO_HILBERT_COEFFS 70 // 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 int updatedisplay = 0;
volatile int mode = 0; // 1 = LSB, 0 = USB
volatile int oldmode = 0;
volatile int Receive = 0; // 0 = Receiver off, 1 = Receiver on
volatile int Transmit = 0; // 0 = Transmitter off, 1 = Transmitter on
// Audio panel gains
static const int Mic_Gain = 0; // Range is 0-63dB.
static const int Lineout_Gain = 20; // Range is 13-31. 13 = 3.16 Vp-p, 31 = 1.16 Vp-p
static const int Linein_Gain = 5; // 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;
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Plus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000287988910943357),
(short)(32768 * -0.000383511439791303),
(short)(32768 * -0.000468041804899774),
(short)(32768 * -0.000529324432676899),
(short)(32768 * -0.000569479602046985),
(short)(32768 * -0.000616670267768531),
(short)(32768 * -0.000731530748681977),
(short)(32768 * -0.001002372095321225),
(short)(32768 * -0.001525299390682192),
(short)(32768 * -0.002370114347025230),
(short)(32768 * -0.003539247773172147),
(short)(32768 * -0.004932965382552984),
(short)(32768 * -0.006337182914262393),
(short)(32768 * -0.007448193692118567),
(short)(32768 * -0.007940501940620482),
(short)(32768 * -0.007570802072162988),
(short)(32768 * -0.006296120449841751),
(short)(32768 * -0.004371955618154949),
(short)(32768 * -0.002391875073164555),
(short)(32768 * -0.001236984700413469),
(short)(32768 * -0.001922560128827416),
(short)(32768 * -0.005356720327533458),
(short)(32768 * -0.012055656297010635),
(short)(32768 * -0.021882952959947619),
(short)(32768 * -0.033888748300090733),
(short)(32768 * -0.046312736456333638),
(short)(32768 * -0.056783367797647665),
(short)(32768 * -0.062699937453677912),
(short)(32768 * -0.061735375084135742),
(short)(32768 * -0.052358513976237808),
(short)(32768 * -0.034257179158167443),
(short)(32768 * -0.008554500746482946),
(short)(32768 * 0.022249911747384360),
(short)(32768 * 0.054622962942346594),
(short)(32768 * 0.084568844473140448),
(short)(32768 * 0.108316122839950818),
(short)(32768 * 0.122979341462627859),
(short)(32768 * 0.127056096658453188),
(short)(32768 * 0.120656295327679283),
(short)(32768 * 0.105420364259485699),
(short)(32768 * 0.084152608145489444),
(short)(32768 * 0.060257510644444748),
(short)(32768 * 0.037105711921879434),
(short)(32768 * 0.017464092086704748),
(short)(32768 * 0.003100559033325746),
(short)(32768 * -0.005373489802481697),
(short)(32768 * -0.008418211280310166),
(short)(32768 * -0.007286730644726664),
(short)(32768 * -0.003638388931163832),
(short)(32768 * 0.000858330713630433),
(short)(32768 * 0.004847436504682235),
(short)(32768 * 0.007476399317750315),
(short)(32768 * 0.008440227567663121),
(short)(32768 * 0.007898970420636600),
(short)(32768 * 0.006314366257036837),
(short)(32768 * 0.004261033495040515),
(short)(32768 * 0.002261843500794377),
(short)(32768 * 0.000680212977485724),
(short)(32768 * -0.000319493110301691),
(short)(32768 * -0.000751893569425181),
(short)(32768 * -0.000752248417868501),
(short)(32768 * -0.000505487955986662),
(short)(32768 * -0.000184645628631330),
(short)(32768 * 0.000087913008490067),
(short)(32768 * 0.000253106348867209),
(short)(32768 * 0.000306473486382603),
(short)(32768 * 0.000277637042003169),
(short)(32768 * 0.000207782317481292),
(short)(32768 * 0.000132446796990356),
(short)(32768 * 0.000072894261560354)
};
// Iowa Hills Hilbert transform filter coefficients
const short Hilbert_Minus_45_Coeffs[NO_HILBERT_COEFFS] = {
(short)(32768 * -0.000072894261560345),
(short)(32768 * -0.000132446796990344),
(short)(32768 * -0.000207782317481281),
(short)(32768 * -0.000277637042003168),
(short)(32768 * -0.000306473486382623),
(short)(32768 * -0.000253106348867259),
(short)(32768 * -0.000087913008490148),
(short)(32768 * 0.000184645628631233),
(short)(32768 * 0.000505487955986583),
(short)(32768 * 0.000752248417868491),
(short)(32768 * 0.000751893569425298),
(short)(32768 * 0.000319493110301983),
(short)(32768 * -0.000680212977485245),
(short)(32768 * -0.002261843500793748),
(short)(32768 * -0.004261033495039842),
(short)(32768 * -0.006314366257036280),
(short)(32768 * -0.007898970420636345),
(short)(32768 * -0.008440227567663343),
(short)(32768 * -0.007476399317751102),
(short)(32768 * -0.004847436504683540),
(short)(32768 * -0.000858330713632029),
(short)(32768 * 0.003638388931162351),
(short)(32768 * 0.007286730644725833),
(short)(32768 * 0.008418211280310565),
(short)(32768 * 0.005373489802483816),
(short)(32768 * -0.003100559033321630),
(short)(32768 * -0.017464092086698697),
(short)(32768 * -0.037105711921871905),
(short)(32768 * -0.060257510644436532),
(short)(32768 * -0.084152608145481672),
(short)(32768 * -0.105420364259479538),
(short)(32768 * -0.120656295327675800),
(short)(32768 * -0.127056096658453216),
(short)(32768 * -0.122979341462631633),
(short)(32768 * -0.108316122839958146),
(short)(32768 * -0.084568844473150454),
(short)(32768 * -0.054622962942358168),
(short)(32768 * -0.022249911747396132),
(short)(32768 * 0.008554500746472333),
(short)(32768 * 0.034257179158159054),
(short)(32768 * 0.052358513976232306),
(short)(32768 * 0.061735375084133286),
(short)(32768 * 0.062699937453678217),
(short)(32768 * 0.056783367797650072),
(short)(32768 * 0.046312736456337288),
(short)(32768 * 0.033888748300094730),
(short)(32768 * 0.021882952959951244),
(short)(32768 * 0.012055656297013388),
(short)(32768 * 0.005356720327535105),
(short)(32768 * 0.001922560128828006),
(short)(32768 * 0.001236984700413229),
(short)(32768 * 0.002391875073163812),
(short)(32768 * 0.004371955618154038),
(short)(32768 * 0.006296120449840938),
(short)(32768 * 0.007570802072162439),
(short)(32768 * 0.007940501940620253),
(short)(32768 * 0.007448193692118624),
(short)(32768 * 0.006337182914262643),
(short)(32768 * 0.004932965382553323),
(short)(32768 * 0.003539247773172483),
(short)(32768 * 0.002370114347025498),
(short)(32768 * 0.001525299390682370),
(short)(32768 * 0.001002372095321316),
(short)(32768 * 0.000731530748682004),
(short)(32768 * 0.000616670267768521),
(short)(32768 * 0.000569479602046963),
(short)(32768 * 0.000529324432676881),
(short)(32768 * 0.000468041804899765),
(short)(32768 * 0.000383511439791304),
(short)(32768 * 0.000287988910943362)
};
// Instantiate the Objects
LiquidCrystal_I2C lcd(0x3F, 16, 2); // Name for the LCD. Set the LCD address to either 0x27 or 0x3F for a 16 chars and 2 line display
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
// 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 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); // Receiver summer to receiver LPF
AudioConnection patchCord50(audioInput, 0, TX_Hilbert_Plus_45, 0); // Mic audio to Hilbert transform +45
AudioConnection patchCord55(audioInput, 0, TX_Hilbert_Minus_45, 0); // Mic audio to Hilbert transform -45
AudioConnection patchCord60(TX_Hilbert_Plus_45, 0, TX_I_Sideband_Switch, 0); // Hilbert transform +45 to receiver summer
AudioConnection patchCord65(TX_I_Sideband_Switch, 0, audioOutput, 0); // Output to the NE612
AudioConnection patchCord70(TX_Hilbert_Minus_45, 0, audioOutput, 1); // Output to the NE612
void setup()
{
// Setup input switches
pinMode(rotAPin, INPUT);
pinMode(rotBPin, INPUT);
pinMode(EncoderPushButton, INPUT);
pinMode(ModeSwitch, INPUT);
pinMode(PTTSwitch, INPUT);
digitalWrite(rotAPin, HIGH);
digitalWrite(rotBPin, HIGH);
digitalWrite(EncoderPushButton, HIGH);
digitalWrite(ModeSwitch, HIGH);
digitalWrite(PTTSwitch, HIGH);
// Setup interrupt pins
attachInterrupt(digitalPinToInterrupt(rotAPin), ISRrotAChange, CHANGE);
attachInterrupt(digitalPinToInterrupt(rotBPin), ISRrotBChange, CHANGE);
// Setup the lcd
lcd.begin();
lcd.backlight();
lcd.cursor();
// Setup the DDS
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0);
si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
si5351.drive_strength(SI5351_CLK0, SI5351_DRIVE_8MA);
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
// Setup the audio shield
AudioNoInterrupts();
AudioMemory(16);
audioShield.enable();
AudioInterrupts();
// Setup transceiver mode
Turn_On_Receiver();
Turn_Off_Transmitter();
UpdateDisplay();
}
void loop()
{
if (freq != oldfreq) // Check to see if the frequency has changed. If so, update everything.
{
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);
}
if (digitalRead(ModeSwitch) == LOW)
mode = 1; // LSB
else
mode = 0; // USB
if (mode != oldmode) // Only update the display on mode change
{
UpdateMode();
UpdateDisplay();
oldmode = mode;
}
if ((digitalRead(PTTSwitch) == 0) && (Receive == 1)) // Transmit
{
delay(50);
if ((digitalRead(PTTSwitch) == 0) && (Receive == 1))
{
Turn_Off_Receiver();
Turn_On_Transmitter();
}
delay(50);
}
if ((digitalRead(PTTSwitch) == 1) && (Transmit == 1)) // Receive
{
delay(50);
if ((digitalRead(PTTSwitch) == 1) && (Transmit == 1))
{
Turn_Off_Transmitter();
Turn_On_Receiver();
}
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(0.8);
RX_Hilbert_Plus_45.begin(Hilbert_Plus_45_Coeffs, NO_HILBERT_COEFFS);
RX_Hilbert_Minus_45.begin(Hilbert_Minus_45_Coeffs, NO_HILBERT_COEFFS);
UpdateMode();
AudioInterrupts();
Receive = 1;
}
void Turn_Off_Receiver()
{
AudioNoInterrupts();
audioShield.muteHeadphone();
RX_Hilbert_Plus_45.end();
RX_Hilbert_Minus_45.end();
AudioInterrupts();
Receive = 0;
}
void Turn_On_Transmitter()
{
AudioNoInterrupts();
audioShield.inputSelect(AUDIO_INPUT_MIC);
audioShield.micGain(Mic_Gain);
audioShield.unmuteLineout(); // Output to the NE612s
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);
UpdateMode();
AudioInterrupts();
Transmit = 1;
}
void Turn_Off_Transmitter()
{
AudioNoInterrupts();
audioShield.muteLineout();
TX_Hilbert_Plus_45.end();
TX_Hilbert_Minus_45.end();
AudioInterrupts();
Transmit = 0;
}
void UpdateMode()
{
if (Receive == 1)
{
if (mode == 1) // LSB
RX_Summer.gain(1, -1);
if (mode == 0) // USB
RX_Summer.gain(1, 1);
}
if (Transmit == 1)
{
if (mode == 1) // LSB
TX_I_Sideband_Switch.gain(0, 1);
if (mode == 0) // USB
TX_I_Sideband_Switch.gain(0, -1);
}
}
// 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()
{
lcd.setCursor(0, 0);
lcd.print(freq);
lcd.setCursor(10, 0);
lcd.print("ZL2CTM");
lcd.setCursor(0, 1);
if (mode == 1)
lcd.print("LSB");
else
lcd.print("USB");
if (freq > 9999999)
{
if (radix == 1)
lcd.setCursor(7, 0);
if (radix == 10)
lcd.setCursor(6, 0);
if (radix == 100)
lcd.setCursor(5, 0);
if (radix == 1000)
lcd.setCursor(4, 0);
if (radix == 10000)
lcd.setCursor(3, 0);
if (radix == 100000)
lcd.setCursor(2, 0);
if (radix == 1000000)
lcd.setCursor(1, 0);
}
if (freq <= 9999999)
{
if (radix == 1)
lcd.setCursor(6, 0);
if (radix == 10)
lcd.setCursor(5, 0);
if (radix == 100)
lcd.setCursor(4, 0);
if (radix == 1000)
lcd.setCursor(3, 0);
if (radix == 10000)
lcd.setCursor(2, 0);
if (radix == 100000)
lcd.setCursor(1, 0);
if (radix == 1000000)
lcd.setCursor(0, 0);
}
}
void SendFrequency()
{
si5351.set_freq((freq * 4) * 100ULL, SI5351_PLL_FIXED, SI5351_CLK0);
}
