Need help with DDS encoder. A used a sketch from a third party altered to use with an old radio. It worked very well until I shorted out the Arduino Uno. The original code called for Include rotary.h. I have not been able to find a library with "small cap" rotary.h. If I change it to Rotary.h the Rotary-master library works to get it to compile. The coder works to change the step rate but not the frequency.
Any help would be very much appreciated. Is there a "rotary.h" library out there? I am a beginner.
Thanks Tom w6kan@arrl.net
// Include the library code
#include <LiquidCrystal.h>
#include <rotary.h>
#include <EEPROM.h>
//Setup some items
#define W_CLK 8 // Pin 8 - connect to AD9850 module word load clock pin (CLK)
#define FQ_UD 9 // Pin 9 - connect to freq update pin (FQ)
#define DATA 10 // Pin 10 - connect to serial data load pin (DATA)
#define RESET 11 // Pin 11 - connect to reset pin (RST)
#define pulseHigh(pin) {digitalWrite(pin, HIGH); digitalWrite(pin, LOW); }
Rotary r = Rotary(2, 3); // sets the pins the rotary encoder uses. Must be interrupt pins.
LiquidCrystal lcd(12, 13, 7, 6, 5, 4); // I used an odd pin combination because I need pin 2 and 3 for the interrupts.
int_fast32_t rx = 5300000; //starting frequency.
int_fast32_t rx2 = 1; // variable to hold the updated frequency
int_fast32_t increment = 10; // starting VFO update increment in HZ.
int buttonstate = 0;
String hertz = "10 Hz";
int hertzPosition = 5;
byte ones, tens, hundreds, thousands, tenthousands, hundredthousands, millions ; //Placeholders
String freq; // string to hold the frequency
int_fast32_t timepassed = millis(); // int to hold the arduino miilis since startup
int memstatus = 1; // value to notify if memory is current or old. 0=old, 1=current.
int ForceFreq = 1; // Change this to 0 after you upload and run a working sketch to activate the EEPROM memory. YOU MUST PUT THIS BACK TO 0 AND UPLOAD THE SKETCH AGAIN AFTER STARTING FREQUENCY IS SET!
void setup() {
pinMode(A0, INPUT); // Connect to a button that goes to GND on push
digitalWrite(A0, HIGH);
lcd.begin(16, 2);
PCICR |= (1 << PCIE2);
PCMSK2 |= (1 << PCINT18) | (1 << PCINT19);
sei();
pinMode(FQ_UD, OUTPUT);
pinMode(W_CLK, OUTPUT);
pinMode(DATA, OUTPUT);
pinMode(RESET, OUTPUT);
pulseHigh(RESET);
pulseHigh(W_CLK);
pulseHigh(FQ_UD); // this pulse enables serial mode on the AD9850 - Datasheet page 12.
lcd.setCursor(hertzPosition, 1);
lcd.print(hertz);
// Load the stored frequency
if (ForceFreq == 0) {
freq = String(EEPROM.read(0)) + String(EEPROM.read(1)) + String(EEPROM.read(2)) + String(EEPROM.read(3)) + String(EEPROM.read(4)) + String(EEPROM.read(5)) + String(EEPROM.read(6));
rx = freq.toInt();
}
}
void loop() {
if (rx != rx2) {
showFreq();
sendFrequency(rx);
rx2 = rx;
}
buttonstate = digitalRead(A0);
if (buttonstate == LOW) {
setincrement();
};
// Write the frequency to memory if not stored and 2 seconds have passed since the last frequency change.
if (memstatus == 0) {
if (timepassed + 2000 < millis()) {
storeMEM();
}
}
}
ISR(PCINT2_vect) {
unsigned char result = r.process();
if (result) {
if (result == DIR_CW) {
rx = rx + increment;
}
else {
rx = rx - increment;
};
if (rx >= 30000000) {
rx = rx2;
}; // UPPER VFO LIMIT
if (rx <= 1000000) {
rx = rx2;
}; // LOWER VFO LIMIT
}
}
// frequency calc from datasheet page 8 = * /2^32
void sendFrequency(double frequency) {
int32_t freq = frequency * 4294967295 / 30000000; // note 125 MHz clock on 9850. You can make 'slight' tuning variations here by adjusting the clock frequency.
for (int b = 0; b < 4; b++, freq >>= 8) {
tfr_byte(freq & 0xFF);
}
tfr_byte(0x000); // Final control byte, all 0 for 9850 chip
pulseHigh(FQ_UD); // Done! Should see output
}
// transfers a byte, a bit at a time, LSB first to the 9850 via serial DATA line
void tfr_byte(byte data)
{
for (int i = 0; i < 8; i++, data >>= 1) {
digitalWrite(DATA, data & 0x01);
pulseHigh(W_CLK); //after each bit sent, CLK is pulsed high
}
}
void setincrement() {
if (increment == 10) {
increment = 50;
hertz = "50 Hz";
hertzPosition = 5;
}
else if (increment == 50) {
increment = 100;
hertz = "100 Hz";
hertzPosition = 4;
}
else if (increment == 100) {
increment = 500;
hertz = "500 Hz";
hertzPosition = 4;
}
else if (increment == 500) {
increment = 1000;
hertz = "1 Khz";
hertzPosition = 6;
}
else if (increment == 1000) {
increment = 2500;
hertz = "2.5 Khz";
hertzPosition = 4;
}
else if (increment == 2500) {
increment = 5000;
hertz = "5 Khz";
hertzPosition = 6;
}
else if (increment == 5000) {
increment = 10000;
hertz = "10 Khz";
hertzPosition = 5;
}
else if (increment == 10000) {
increment = 100000;
hertz = "100 Khz";
hertzPosition = 4;
}
else if (increment == 100000) {
increment = 1000000;
hertz = "1 Mhz";
hertzPosition = 6;
}
else {
increment = 10;
hertz = "10 Hz";
hertzPosition = 5;
};
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(hertzPosition, 1);
lcd.print(hertz);
delay(250); // Adjust this delay to speed up/slow down the button menu scroll speed.
};
void showFreq() {
millions = int(rx / 1000000);
hundredthousands = ((rx / 100000) % 10);
tenthousands = ((rx / 10000) % 10);
thousands = ((rx / 1000) % 10);
hundreds = ((rx / 100) % 10);
tens = ((rx / 10) % 10);
ones = ((rx / 1) % 10);
lcd.setCursor(0, 0);
lcd.print(" ");
if (millions > 9) {
lcd.setCursor(1, 0);
}
else {
lcd.setCursor(2, 0);
}
lcd.print(millions);
lcd.print(".");
lcd.print(hundredthousands);
lcd.print(tenthousands);
lcd.print(thousands);
lcd.print(".");
lcd.print(hundreds);
lcd.print(tens);
lcd.print(ones);
lcd.print(" Mhz ");
timepassed = millis();
memstatus = 0; // Trigger memory write
delay (500);
lcd.clear();
lcd.setCursor (5,0);
lcd.print (12506360 - rx);
lcd.setCursor (7,1);
lcd.print(hertz);
};
void storeMEM() {
//Write each frequency section to a EPROM slot. Yes, it's cheating but it works!
EEPROM.write(0, millions);
EEPROM.write(1, hundredthousands);
EEPROM.write(2, tenthousands);
EEPROM.write(3, thousands);
EEPROM.write(4, hundreds);
EEPROM.write(5, tens);
EEPROM.write(6, ones);
memstatus = 1; // Let program know memory has been written
};