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Copy pathdc8lz_aadds.ino
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dc8lz_aadds.ino
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/***************************************************************************\
dc8lz_aadds.ino
Antenna Analyzer & DDS AADDS
Stephan Lauffer, DC8LZ
Partly based on DDS_Sweeper.BAS from Beric Dunn (K6BEZ)
Copyright (c) 2013,2018 CC-BY-SA
Creative Commons Attribution-ShareAlike 3.0 Unported License
Date : 2018/06/15
*/
#define VERSION 0.22
/* Notes : Written using for the Arduino Nano in 5 volt version
: Pins:
: A0 - Reverse Detector Analog in
: A1 - Forward Detector Analog in
: 5 - Speaker
: 6-8 - Three buttons 0 - Previous, 1 - Next, 3 - Select
: 9-12 - Comminucate with the AD9850 DDS
***************************************************************************/
#include "U8glib.h"
#include <EEPROM.h>
// OLED display connected via A4 (SDA), A5 (SCL)
U8GLIB_SH1106_128X64 u8g(U8G_I2C_OPT_NONE); // I2C / TWI
// Debug via Serial...
uint8_t Debug = 2; // 0 -> NO SERIAL (!) and no debugging, 1 -> state, key, 2 -> debug more...
// Define Pins used to control AD9850 DDS
#define FQ_UD 10
#define SDAT 11
#define SCLK 9
#define RESET 12
// Define Pins used to read voltage value, two analog pins:
#define PIN_A0 A0
#define PIN_A1 A1
// Define Pin for speaker
#define SPEAKER 3
// Define Pins for the three buttons
#define uiKeySelect 6
#define uiKeyPrev 7
#define uiKeyNext 8
// Non-Arduino pin definitions...
#define KEY_NONE 0
#define KEY_PREV 1
#define KEY_NEXT 2
#define KEY_SELECT 3
uint8_t uiKeyCodeFirst = KEY_NONE;
uint8_t uiKeyCodeSecond = KEY_NONE;
uint8_t uiKeyCode = KEY_NONE;
#define MENU_ITEMS 6
const char *menu_strings[MENU_ITEMS] = { "Hold", "Start Freq", "End Freq", "Sweep Steps", "Run Graph", "Run Text"};
#define INT_VALS 11
const char *int_val[INT_VALS] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
uint8_t menu_current = 0;
uint8_t num_current = 0;
uint8_t last_key_code = KEY_NONE;
char redraw_required = 't'; // menu_redraw_required -> m
// text_redraw_required -> t
// drawIntInput_redraw_required -> i
// drawGraph_redraw_required -> g
// draw nothing... -> x
uint8_t SweepMode = 0; // 0 -> hold an meassure current (start) frequence and vswr
// 1 -> sweep from start to stop freq (one time)
// 2 -> sweep from start to stop freq (endles loop)
uint8_t In_State = 0; // 0 -> hold text mode , 1 -> In Menue, 2 -> Set Start F, 3 -> Set End F, 4 -> Sweep Steps, 5 -> graphic run, 6 -> text run, 7 -> Calibration
unsigned int NumSteps; // Number of steps to use in the sweep
unsigned int Step; // actual step in the sweep
char charBuf[9]; // here we store the array of the values to change (f.e. Fstart_MHz or NumSteps)
uint8_t Input_Length = 9; // length of the charBuf. Depends on the value to change
double Fstart_MHz; // Start Frequency for sweep. Stored in eeprom.
double Fstop_MHz; // Stop Frequency for sweep. Stored in eeprom.
double current_freq_MHz; // Temp variable used during sweep.
double VSWR_Min; // Best SWR from the last measure(s). Stored in eeprom.
double VSWR_Max;
double Fres_MHz; // Frequency at the best SWR. Stored in eeprom.
double Fset_MHz = 0; // Temp variable...
double Fstep_MHz = 0; // Step length during a sweep.
double VSWR; // current VSWR
// The measure failure is very close to a linear function.
// So in calibration mode we get the curve by measure two points:
#define CalMHzMin 5 // low calibration frequence
#define CalMHzMax 20 // hight calibration frequencve
// The curve is defined by:
double CalM; // round about 0.004827;
double CalB; // round abot 0.525;
#define MeasureRuns 5 // default/min runs of internal analog read measures
uint8_t SpeakerOn; // 0 -> Speaker for tuning in hold off/on
uint8_t toneUp = 0; // current speaker state...
#define SpeakerFreq 5100 // the min speaker freq at best swr == 1
#define SoundPauseInteval 1000 // longest sound pausing -> worst SWR. Continously sound -> best SWR.
// SoundInterval in millis.
unsigned long TimeLast = 0; // ...
unsigned int VSWR_Sweep[128]; // array for the SWR measures in the graph mode
long serial_input_number; // Used to build number from serial stream
char incoming_char; // Character read from serial stream
void calibrate() {
// Sweep from CalMHzMin MHz to CalMHzMax MHz with a 50R dummy ends closely in a linear function.
// So take min. and max... get the linear curve...
double y0, y1;
SetDDSFreq(CalMHzMin);
y0 = MeasureVoltage(PIN_A0, 10); // average if ten measures...
SetDDSFreq(CalMHzMax);
y1 = MeasureVoltage(PIN_A0, 10);
// find out linear function...
CalM = ( y1 - y0 ) / (CalMHzMax - CalMHzMin); // ...slope...
CalB = y1 - (CalM * CalMHzMax); // ...intercept..
if (Debug > 1) {
Serial.print("Debug: calibrate: y0, y1, CalM, CalB: "); Serial.print(y0,6); Serial.print (" "); Serial.print(y1,6); Serial.print (" "); Serial.print(CalM,6); Serial.print (" "); Serial.print(CalB,6); Serial.println();
}
updateEEPROM();
}
double fixREV(double REV) {
if (Debug > 1 ) {
Serial.print("Debug: fixREV: REV, Offset "); Serial.print(REV);
}
REV = (REV - ((current_freq_MHz * CalM + CalB)) ) ;
if (REV < 0)
REV = 0;
if (Debug > 1 ) {
Serial.print(" "); Serial.print(current_freq_MHz * CalM + CalB); Serial.println();
}
return REV;
}
void setFont(uint8_t Font) {
// 0 == tiny... 3 large
if (Font == 0)
//u8g.setFont(u8g_font_4x6);
u8g.setFont(u8g_font_04b_03br);
/*
if (Font == 1)
u8g.setFont(u8g_font_5x7);
if (Font == 2)
u8g.setFont(u8g_font_5x8);
*/
if (Font == 3)
u8g.setFont(u8g_font_6x12);
if (Font == 4)
u8g.setFont(u8g_font_9x15B);
u8g.setFontRefHeightText();
u8g.setFontPosTop();
}
void updateEEPROM(void) {
int eeAddress = 0;
EEPROM.put(eeAddress, Fstart_MHz);
eeAddress = sizeof(double);
EEPROM.put(eeAddress, Fstop_MHz);
eeAddress += sizeof(double);
EEPROM.put(eeAddress, VSWR_Min);
eeAddress += sizeof(double);
EEPROM.put(eeAddress, Fres_MHz);
eeAddress += sizeof(double);
EEPROM.put(eeAddress, NumSteps);
eeAddress += sizeof(unsigned int); // size offset is value of previous address size (!)
EEPROM.put(eeAddress, CalM);
eeAddress += sizeof(double);
EEPROM.put(eeAddress, CalB);
eeAddress += sizeof(double);
EEPROM.put(eeAddress, SpeakerOn);
}
void getEEPROM(void) {
int eeAddress = 0;
EEPROM.get(eeAddress, Fstart_MHz);
eeAddress = sizeof(double);
EEPROM.get(eeAddress, Fstop_MHz);
eeAddress += sizeof(double);
EEPROM.get(eeAddress, VSWR_Min);
eeAddress += sizeof(double);
EEPROM.get(eeAddress, Fres_MHz);
eeAddress += sizeof(double);
EEPROM.get(eeAddress, NumSteps);
eeAddress += sizeof(unsigned int); // size offset is value of previous address size (!)
EEPROM.get(eeAddress, CalM);
eeAddress += sizeof(double);
EEPROM.get(eeAddress, CalB);
eeAddress += sizeof(double);
EEPROM.get(eeAddress, SpeakerOn);
if ( (Fstart_MHz <= 0.000001) || (Fstart_MHz >= 99) )
Fstart_MHz = 7;
if ( (Fstop_MHz <= 0.000001) || (Fstop_MHz >= 99) )
Fstop_MHz = 9;
if (Fstart_MHz > Fstop_MHz)
Fstop_MHz = Fstart_MHz + 1;
if ( (NumSteps <= 0) || (NumSteps >= 999) )
NumSteps = 100;
if (VSWR_Min < 1)
VSWR_Min = 1234;
if ( (Fres_MHz <= 0.000001) || (Fres_MHz >= 99) )
Fres_MHz = 12.3456789;
if ( (CalM < 0.00001) || (CalM > 200) )
CalM = 0.5;
if ( (CalB < 0.00001) || (CalB > 200) )
CalB = 12;
if ( (SpeakerOn != 0) || (SpeakerOn != 1) )
SpeakerOn = 0;
// save changed setting...
updateEEPROM();
//Serial.print("get: "); Serial.print(CalM); Serial.print (" "); Serial.print(CalB); Serial.print(" "); Serial.print(SpeakerOn); Serial.println();
}
void calcStep() {
Fstep_MHz = (Fstop_MHz - Fstart_MHz) / (NumSteps -1);
}
double char2double() {
String inString(charBuf);
double Fnew_MHz;
Fnew_MHz = inString.toDouble();
return Fnew_MHz;
}
unsigned int char2Int() {
String inString(charBuf);
unsigned int Steps;
Steps = atoi(inString.c_str());
return Steps;
}
void clearOLED() {
u8g.firstPage();
do {
} while ( u8g.nextPage() );
u8g.setDefaultForegroundColor();
u8g.setFontRefHeightText();
u8g.setFontPosTop();
}
void drawText(void) {
drawHeader();
u8g_uint_t d;
u8g.setDefaultForegroundColor();
u8g.setFontRefHeightText();
u8g.setFontPosTop();
setFont(3);
d = u8g.getStrWidth("0");
u8g.setPrintPos(0 , 13);
if (SweepMode == 0) {
u8g.print ("H");
} else if (SweepMode == 1) {
u8g.print ("S");
} else if (SweepMode == 2) {
u8g.print ("L");
}
if (In_State == 6) {
u8g.setPrintPos(d * 13, 13); u8g.print (Step);
u8g.setPrintPos(d * 16, 13); u8g.print ("/");
u8g.setPrintPos(d * 18, 13); u8g.print (NumSteps);
}
u8g.setPrintPos(0, 26); u8g.print (current_freq_MHz, 6);
u8g.setPrintPos(d * 13, 26); u8g.print (Fstep_MHz, 6);
u8g.setPrintPos(0, 39 ); u8g.print (VSWR_Max,3);
u8g.setPrintPos(d * 12 , 39 ); u8g.print (VSWR, 3);
u8g.setPrintPos(0, 52 ); u8g.print (Fres_MHz, 6);
u8g.setPrintPos(d * 12 , 52); u8g.print (VSWR_Min, 3);
}
void drawHeader(void) {
uint8_t i, h;
u8g_uint_t w, d;
setFont(0);
h = u8g.getFontAscent() - u8g.getFontDescent();
w = u8g.getWidth();
d = u8g.getStrWidth("0");
u8g.setDefaultForegroundColor();
u8g.setPrintPos(2, 0); u8g.print (Fstart_MHz, 3);
u8g.setPrintPos(d * 6 , 0); u8g.print ("-");
u8g.setPrintPos(d * 8, 0); u8g.print (Fstop_MHz, 3);
u8g.setPrintPos(d * 16, 0); u8g.print (Fres_MHz, 3);
u8g.setPrintPos(d * 23 - 2, 0); u8g.print (VSWR_Min, 1);
u8g.setPrintPos(123 , 0);
u8g.setColorIndex(1);
u8g.drawLine (0, h + 1 , 128, h + 1);
}
void drawMenu(void) {
uint8_t i, h, y; // y offset to take care of the header
u8g_uint_t w, d;
y = 10;
drawHeader();
setFont(3);
h = u8g.getFontAscent() - u8g.getFontDescent();
w = u8g.getWidth();
u8g.setDefaultForegroundColor();
for ( i = 0; i < MENU_ITEMS; i++ ) {
d = (w - u8g.getStrWidth(menu_strings[i])) / 2;
u8g.setDefaultForegroundColor();
if ( i == menu_current ) {
u8g.drawBox(0, i * h + y, w, h);
u8g.setDefaultBackgroundColor();
}
u8g.drawStr(d, i * h + y, menu_strings[i]);
}
}
void drawIntInput() {
uint8_t i, h;
unsigned int Num ;
u8g_uint_t w, d;
uint8_t x, y; // offset for the position of the text
x = 20;
y = 30;
String inString = "";
drawHeader();
setFont(4);
h = u8g.getFontAscent() - u8g.getFontDescent();
w = u8g.getWidth();
d = u8g.getStrWidth("0");
for ( i = 0 ; i < Input_Length; i++) {
inString = String (charBuf[i]);
if ( ((i == 0) and (inString == " ")) ) { // skip the first|null values. This is neededs since charBuf may
//continue; // be much longer than f.e. the length of the sweep number.
Num = 0;
} else {
Num = inString.toInt();
}
u8g.setDefaultForegroundColor();
if ( inString == "." ) {
u8g.drawStr( i * d + x, y, ".");
continue;
} else {
if ( i == num_current ) { // highlight the current number (draw a box)
u8g.drawBox( i * d + x, y , d, h);
u8g.setDefaultBackgroundColor();
}
u8g.drawStr( i * d + x, y, int_val[Num]); // print the current bumber
}
}
}
void drawGraph() {
uint8_t i, h;
int Num ;
u8g_uint_t w, d;
uint8_t x, y0, y1; // offset for the position of the text
double y_fact;
x = 0;
y0 = 0;
y1 = 0;
h = u8g.getHeight();
w = u8g.getWidth(); // get width of the display
y_fact = (h - 5) / (VSWR_Max - VSWR_Min) ;
for ( i = 0 ; i < 127 ; i++) {
y0 = h - 3 - (((double (VSWR_Sweep[i]) / 1000) - VSWR_Min) * y_fact);
y1 = h - 3 - (((double (VSWR_Sweep[i+1]) / 1000) - VSWR_Min) * y_fact);
u8g.drawLine (i, y0, i + 1 , y1 );
if (Debug > 1) {
Serial.print("Debug: drawGraph done: i, y0, y1, VSWR_Sweep[i], VSWR_Sweep[i+1]: ");
Serial.print(i); Serial.print(", ");Serial.print(y0); Serial.print(", "); Serial.print(y1);Serial.print(", "); Serial.print(VSWR_Sweep[i]);Serial.print(", "); Serial.println(VSWR_Sweep[i+1]);
}
}
// print scale...
setFont(0);
d = u8g.getStrWidth("0");
u8g.setDefaultBackgroundColor();
u8g.drawBox( 0, 0 , 20 , 7);
u8g.drawBox( w / 2 - 2 * d , 0, 20 , 7);
u8g.drawBox( w - 1 - 4 * d , 0, 4 * d, 7);
u8g.drawBox( 0, 10 , 20, 7);
u8g.drawBox( 0, 55 , 20, 7);
u8g.setDefaultForegroundColor();
u8g.setPrintPos(0, 0); u8g.print (Fstart_MHz, 2);
u8g.setPrintPos(w / 2 - 2 * d , 0); u8g.print (Fstart_MHz + (Fstop_MHz - Fstart_MHz) / 2, 2);
u8g.setPrintPos(w - 5 * d, 0); u8g.print (Fstop_MHz, 2);
u8g.setPrintPos(0, 10); u8g.print (VSWR_Max);
u8g.setPrintPos(0, 55); u8g.print (VSWR_Min);
u8g.drawLine(w/2, h - 1 , w/2, h - 4);
u8g.drawLine (0 , h - 1 , w, h - 1);
}
void SWRSound() {
int Pulse = SoundPauseInteval - (SoundPauseInteval / VSWR);
if ( Pulse < 47 ) { // this means tune down at swr < 1.05... continously sound...
// if (toneUp == 0) { // and if speaker was off...
toneUp = 1;
tone(SPEAKER, SpeakerFreq);
// }
} else { // Not that perfekt SWR ... pulsed sound with increased freq if swr increases
if ( (millis() - TimeLast) > (Pulse/4) ) {
if (toneUp == 1) { // if already on, mute...
toneUp = 0;
noTone(SPEAKER);
} else {
toneUp = 1;
tone(SPEAKER, SpeakerFreq / VSWR); // better swr -> higher swr (getting close to 5100Hz)
}
TimeLast = millis();
}
}
}
void SwitchSpeaker() {
if (SpeakerOn == 0 ) { // only in text hold enable/diasble speaker
SpeakerOn = 1;
} else {
SpeakerOn = 0;
noTone(SPEAKER);
}
}
void SwitchRunHold() {
SweepMode++;
if (SweepMode == 3) {
SweepMode = 0;
}
switch (SweepMode) {
case 0:
break;
case 1:
case 2:
VSWR_Max = 0;
VSWR_Min = 1234;
Switch2TextRun();
break;
}
redraw_required = 't';
}
void SwitchMenuNext() {
menu_current++;
if ( menu_current >= MENU_ITEMS )
menu_current = 0;
redraw_required = 'm';
}
void SwitchMenuPrev() {
if ( menu_current == 0 )
menu_current = MENU_ITEMS;
menu_current--;
redraw_required = 'm';
}
void SwitchIncChar() {
int Num;
String inString;
inString = String(charBuf[num_current]);
Num = inString.toInt();
Num++;
if ( Num >= 10 ) {
Num = 0;
}
charBuf[num_current] = (char) Num + 48;
redraw_required = 'i';
}
void SwitchDecChar() {
int Num;
String inString;
inString = String ( charBuf[num_current] );
Num = inString.toInt();
Num--;
if ( Num < 0 ) {
Num = 9;
}
charBuf[num_current] = (char) Num + 48;
redraw_required = 'i';
}
void Switch2SetFstart() {
In_State = 2;
Input_Length = 9;
dtostrf(Fstart_MHz, 9, 6, charBuf);
num_current = 0;
redraw_required = 'i';
}
void Switch2SetFstop() {
In_State = 3;
Input_Length = 9;
dtostrf(Fstop_MHz, 9, 6, charBuf);
num_current = 0;
redraw_required = 'i';
}
void Switch2SetSweepSteps() {
In_State = 4;
Input_Length = 3;
dtostrf((double) NumSteps, 3, 0, charBuf);
num_current = 0;
redraw_required = 'i';
calcStep();
}
void Switch2Menu() {
In_State = 1;
SweepMode = 0;
// menu_current = 0;
num_current = 0;
noTone(SPEAKER);
redraw_required = 'm';
}
void Switch2TextHold() {
In_State = 0;
SweepMode = 0;
if (Step >= NumSteps) {
Step= 0;
}
menu_current = 0;
num_current = 0;
current_freq_MHz = Fstart_MHz;
SetDDSFreq(Fstart_MHz);
redraw_required = 't';
}
void Switch2GraphMode() {
In_State = 5;
SweepMode = 1;
Fstep_MHz = (Fstop_MHz - Fstart_MHz) / ( NumSteps -1) ;
VSWR_Max = 0;
VSWR_Min = 1234;
menu_current = 0;
num_current = 0;
redraw_required = 'g';
}
void Switch2TextRun() {
In_State = 6;
Fstep_MHz = (Fstop_MHz - Fstart_MHz) / ( NumSteps -1) ;
menu_current = 0;
num_current = 0;
redraw_required = 't';
}
void ZoomMeas() {
// getting closer to the res frequence...
/*
double Fgap_MHz = ( round (( Fstop_MHz - Fstart_MHz ) * 100) / 100 ) / 10;
Fstart_MHz = round (Fres_MHz * 100 ) / 100 - Fgap_MHz;
Fstop_MHz = round (Fres_MHz * 100 ) / 100 + Fgap_MHz;
*/
double Fgap_MHz = ( Fstop_MHz - Fstart_MHz ) / 10;
Fstart_MHz = Fres_MHz - Fgap_MHz;
Fstop_MHz = Fres_MHz + Fgap_MHz;
if (Fstart_MHz <= 0)
Fstart_MHz = 0.0001; // at least 100Hz should be fine
if ((Fstop_MHz <= 0) or (Fstop_MHz <= Fstart_MHz) )
Fstop_MHz = Fstart_MHz + Fgap_MHz;
Fstep_MHz = (Fstop_MHz - Fstart_MHz) / ( NumSteps -1) ;
}
void updateMenu(void) {
if ( uiKeyCode != KEY_NONE && last_key_code == uiKeyCode ) {
return;
}
last_key_code = uiKeyCode;
switch ( uiKeyCode ) {
// In_State 0 display values
// In_State 1 change settings
// ...2 start freq
// ...3 stop freq
// ...4 sweep steps
// ...5 Graph run
// ...6 Text run
case KEY_NEXT:
if ( In_State == 0 ) {
Switch2SetFstart();
break;
}
if ( In_State == 1 ) {
SwitchMenuNext();
break;
}
if ( (In_State == 2) || (In_State == 3) || (In_State == 4)) {
SwitchDecChar();
break;
}
if ( In_State == 5 ) {
Switch2TextRun();
break;
}
if ( In_State == 6 ) {
ZoomMeas();
Switch2TextRun();
break;
}
break;
case KEY_PREV:
if ( In_State == 0 ) {
// SwitchRunHold();
SwitchSpeaker();
break;
}
if ( In_State == 1 ) {
SwitchMenuPrev();
break;
}
if ( (In_State == 2) || (In_State == 3) || (In_State == 4)) {
SwitchIncChar();
break;
}
if ( In_State == 5 ) {
Switch2GraphMode();
break;
}
if ( In_State == 6 ) {
SwitchRunHold();
break;
}
break;
case KEY_SELECT:
if ( In_State == 0 ) {
Switch2Menu();
break;
}
if ( In_State == 1 ) {
if (menu_current == 0) {
Switch2TextHold();
break;
}
if (menu_current == 1 ) {
Switch2SetFstart();
break;
}
if (menu_current == 2 ) {
Switch2SetFstop();
break;
}
if (menu_current == 3 ) {
Switch2SetSweepSteps();
break;
}
if (menu_current == 4 ) {
Switch2GraphMode();
break;
}
if (menu_current == 5 ) {
SweepMode = 1;
Switch2TextRun();
break;
}
}
if ( (In_State == 2) || (In_State == 3) || (In_State == 4) ) {
num_current++;
if (num_current == 2 ) {
if ( (In_State == 2) || ( In_State == 3 ) )
num_current = 3; // skip the "."
redraw_required = 'i';
break;
}
if (num_current == Input_Length) { // we just changed the last number of the frequence... store and exit to main menue
num_current = 0;
if ( In_State == 2 )
Fstart_MHz = char2double();
if ( In_State == 3 )
Fstop_MHz = char2double();
if ( In_State == 4 )
NumSteps = char2Int();
// chech new frequences and calc steps
if (Fstart_MHz >= Fstop_MHz ) {
Fstop_MHz = Fstart_MHz + 1;
}
calcStep();
redraw_required = 'm';
In_State = 1;
break;
} else {
redraw_required = 'i';
break;
}
}
if ( In_State == 5 ) {
Switch2Menu();
break;
}
if ( In_State == 6 ) {
Switch2Menu();
break;
}
break;
}
}
void uiStep(void) {
uiKeyCodeSecond = uiKeyCodeFirst;
if ( digitalRead(uiKeyPrev) == LOW )
uiKeyCodeFirst = KEY_PREV;
else if ( digitalRead(uiKeyNext) == LOW )
uiKeyCodeFirst = KEY_NEXT;
else if ( digitalRead(uiKeySelect) == LOW )
uiKeyCodeFirst = KEY_SELECT;
else
uiKeyCodeFirst = KEY_NONE;
if ( uiKeyCodeSecond == uiKeyCodeFirst )
uiKeyCode = uiKeyCodeFirst;
else
uiKeyCode = KEY_NONE;
}
void Comm_Serial() {
incoming_char = Serial.read();
switch(incoming_char){
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':