multifeaturedvfo

MULTI-FEATURED VFO - from AK2B Tom Hall

Este artigo refere-se a este link :

Multi-Featured VFO April, 6 , 2015

Veja tambem detalhes de layout em :

Si5351 simple VFO hardware setup

Eu usei um shield home made e meu esquema ficou assim:

A cópia da biblioteca esta aqui library NT7S por motivos de update.

O sketch modificado :

/*
This entire program is taken from Jason Mildrum, NT7S and Przemek Sadowski, SQ9NJE.
There is not enough original code written by me (AK2B) to make it worth mentioning.
http://nt7s.com/
http://sq9nje.pl/
http://ak2b.blogspot.com/
Changed some lines to be OK according new library from NT7S - py2ohh Miguel
http://py2ohh.w2c.com.br/
*/

#include <Rotary.h>
#include <si5351.h>
#include <Wire.h>
#include <LiquidCrystal.h>

#define F_MIN        100000000UL               // Lower frequency limit
#define F_MAX        5000000000UL

#define ENCODER_A    3                      // Encoder pin A
#define ENCODER_B    2                      // Encoder pin B
#define ENCODER_BTN 11
#define LCD_RS        5
#define LCD_E                6
#define LCD_D4        7
#define LCD_D5        8
#define LCD_D6        9
#define LCD_D7        10

LiquidCrystal lcd(LCD_RS, LCD_E, LCD_D4, LCD_D5, LCD_D6, LCD_D7);       // LCD - pin assignement in
Si5351 si5351;
Rotary r = Rotary(ENCODER_A, ENCODER_B);
volatile uint32_t LSB = 899950000ULL;
volatile uint32_t USB = 900150000ULL;
volatile uint32_t bfo = 900150000ULL; //start in usb
//These USB/LSB frequencies are added to or subtracted from the vfo frequency in the "Loop()"
//In this example my start frequency will be 14.20000 plus 9.001500 or clk0 = 23.2015Mhz
volatile uint32_t vfo = 1420000000ULL / SI5351_FREQ_MULT; //start freq - change to suit
volatile uint32_t radix = 100;    //start step size - change to suit
boolean changed_f = 0;
String tbfo = "";

//------------------------------- Set Optional Features here --------------------------------------
//Remove comment (//) from the option you want to use. Pick only one
//#define IF_Offset //Output is the display plus or minus the bfo frequency
#define Direct_conversion //What you see on display is what you get
//#define FreqX4 //output is four times the display frequency
//--------------------------------------------------------------------------------------------------

/**************************************/
/* Interrupt service routine for      */
/* encoder frequency change           */
/**************************************/
ISR(PCINT2_vect) {
unsigned char result = r.process();
if (result == DIR_CW)
    set_frequency(1);
else if (result == DIR_CCW)
    set_frequency(-1);
}
/**************************************/
/* Change the frequency               */
/* dir = 1    Increment               */
/* dir = -1   Decrement56
/**************************************/
void set_frequency(short dir)
{
if (dir == 1)
    vfo += radix;
if (dir == -1)
    vfo -= radix;

//    if(vfo > F_MAX)
//      vfo = F_MAX;
//    if(vfo < F_MIN)
//      vfo = F_MIN;

changed_f = 1;
}
/**************************************/
/* Read the button with debouncing    */
/**************************************/
boolean get_button()
{
if (!digitalRead(ENCODER_BTN))
{
    delay(20);
    if (!digitalRead(ENCODER_BTN))
    {
      while (!digitalRead(ENCODER_BTN));
      return 1;
    }
}
return 0;
}

/**************************************/
/* Displays the frequency             */
/**************************************/
void display_frequency()
{
uint16_t f, g;

lcd.setCursor(3, 0);
f = vfo / 1000000;     //variable is now vfo instead of 'frequency'
if (f < 10)
    lcd.print(' ');
lcd.print(f);
lcd.print('.');
f = (vfo % 1000000) / 1000;
if (f < 100)
    lcd.print('0');
if (f < 10)
    lcd.print('0');
lcd.print(f);
lcd.print('.');
f = vfo % 1000;
if (f < 100)
    lcd.print('0');
if (f < 10)
    lcd.print('0');
lcd.print(f);
lcd.print("Hz");
lcd.setCursor(0, 1);
lcd.print(tbfo);
//Serial.println(vfo + bfo);
//Serial.println(tbfo);

}

/**************************************/
/* Displays the frequency change step */
/**************************************/
void display_radix()
{
lcd.setCursor(9, 1);
switch (radix)
{
    case 1:
      lcd.print("    1");
      break;
    case 10:
      lcd.print("   10");
      break;
    case 100:
      lcd.print(" 100");
      break;
    case 1000:
      lcd.print("   1k");
      break;
    case 10000:
      lcd.print(" 10k");
      break;
    case 100000:
      //lcd.setCursor(10, 1);
      lcd.print(" 100k");
      break;
      case 1000000:
      lcd.setCursor(9, 1);
      lcd.print("1000k"); //1MHz increments
      break;
}
lcd.print("Hz");
}

void setup()
{
Serial.begin(19200);
lcd.begin(16, 2);                                                    // Initialize and clear the LCD
lcd.clear();
Wire.begin();

si5351.set_correction(140); //**mine. There is a calibration sketch in File/Examples/si5351Arduino-Jason
//where you can determine the correction by using the serial monitor.

//initialize the Si5351
si5351.init(SI5351_CRYSTAL_LOAD_8PF, 27000000,0); //If you're using a 27Mhz crystal, put in 27000000 instead of 0
// 0 is the default crystal frequency of 25Mhz.

si5351.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
// Set CLK0 to output the starting "vfo" frequency as set above by vfo = ?

#ifdef IF_Offset
  si5351.set_freq((vfo * SI5351_FREQ_MULT) + bfo, SI5351_CLK0);
volatile uint32_t vfoT = (vfo * SI5351_FREQ_MULT) + bfo;
tbfo = "USB";
// Set CLK2 to output bfo frequency
// si5351.set_freq( bfo, 0, SI5351_CLK2);
//si5351.drive_strength(SI5351_CLK0,SI5351_DRIVE_2MA); //you can set this to 2MA, 4MA, 6MA or 8MA
//si5351.drive_strength(SI5351_CLK1,SI5351_DRIVE_2MA); //be careful though - measure into 50ohms
//si5351.drive_strength(SI5351_CLK2,SI5351_DRIVE_2MA); //
#endif

#ifdef Direct_conversion
si5351.set_freq((vfo * SI5351_FREQ_MULT), SI5351_CLK0);
#endif

#ifdef FreqX4
si5351.set_freq((vfo * SI5351_FREQ_MULT) * 4, SI5351_CLK0);
#endif

pinMode(ENCODER_BTN, INPUT_PULLUP);
PCICR |= (1 << PCIE2);           // Enable pin change interrupt for the encoder
PCMSK2 |= (1 << PCINT18) | (1 << PCINT19);
sei();
display_frequency(); // Update the display
display_radix();
}

void loop()
{
// Update the display if the frequency has been changed
if (changed_f)
{
    display_frequency();

#ifdef IF_Offset
    si5351.set_freq((vfo * SI5351_FREQ_MULT) + bfo, SI5351_CLK0);
    //you can also subtract the bfo to suit your needs
    //si5351.set_freq((vfo * SI5351_FREQ_MULT) - bfo  , SI5351_CLK0);

    if (vfo >= 10000000ULL & tbfo != "USB")
    {
      bfo = USB;
      tbfo = "USB";
      si5351.set_freq( bfo, SI5351_CLK2);
      Serial.println("We've switched from LSB to USB");
    }
    else if (vfo < 10000000ULL & tbfo != "LSB")
    {
      bfo = LSB;
      tbfo = "LSB";
      si5351.set_freq( bfo, SI5351_CLK2);
      Serial.println("We've switched from USB to LSB");
    }
#endif

#ifdef Direct_conversion
    si5351.set_freq((vfo * SI5351_FREQ_MULT), SI5351_CLK0);
    tbfo = "";
#endif

#ifdef FreqX4
    si5351.set_freq((vfo * SI5351_FREQ_MULT) * 4, SI5351_CLK0);
    tbfo = "";
#endif

    changed_f = 0;
}

// Button press changes the frequency change step for 1 Hz steps
if (get_button())
{
    switch (radix)
    {
      case 1:
        radix = 10;
        break;
      case 10:
        radix = 100;
        break;
      case 100:
        radix = 1000;
        break;
      case 1000:
        radix = 10000;
        break;
      case 10000:
        radix = 100000;
        break;
      case 100000:
        radix = 1000000;
        break;
    }
    display_radix();
}
}

73 de py2ohh miguel (maio -2017)