{"id":595,"date":"2025-07-24T11:56:49","date_gmt":"2025-07-24T09:56:49","guid":{"rendered":"http:\/\/www.f4irx.com\/wordpress\/?p=595"},"modified":"2025-07-24T11:59:23","modified_gmt":"2025-07-24T09:59:23","slug":"adf4351-synth-35mhz-4-4ghz","status":"publish","type":"post","link":"http:\/\/www.f4irx.com\/wordpress\/index.php\/2025\/07\/24\/adf4351-synth-35mhz-4-4ghz\/","title":{"rendered":"ADF4351 Synth 35Mhz-4.4Ghz"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

code :<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 * Name   : ADF4351 Controled Board 35Mhz-4.4Ghz with 10Mhz OCXO Reference<\/p>\n\n\n\n

 * Author : St\u00e9phane HELAIEM – F4IRX<\/p>\n\n\n\n

 * Date   : july 12, 2025<\/p>\n\n\n\n

 * Purpose: ADF 4351 Synth<\/p>\n\n\n\n

 * Versions:<\/p>\n\n\n\n

 *    1.0  : ARDUINO NANO  <\/p>\n\n\n\n

 *    1.1a : Change to ESP32 C3 ( 3.3v compatible )<\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *    <\/p>\n\n\n\n

 *  <\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       Include libraries<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

#include <adf4351.h> \/\/ need bignumber library see adf4351 lib<\/p>\n\n\n\n

#include <Arduino.h><\/p>\n\n\n\n

#include <LCD-I2C.h><\/p>\n\n\n\n

#include <Wire.h><\/p>\n\n\n\n

#include <Preferences.h><\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       Other definitions<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

#define PIN_CE   10  \/\/ Not connected Enable CE Pin on ADF4351 short 3.3v+CE on board<\/p>\n\n\n\n

#define PIN_SS   7   \/\/ LE of ADF4351<\/p>\n\n\n\n

#define PIN_MOSI  6  \/\/ DAT Pin on ADF4351<\/p>\n\n\n\n

#define PIN_MISO  5  \/\/ not Connected<\/p>\n\n\n\n

#define PIN_SCK  4   \/\/ CLK Pin on ADF4351<\/p>\n\n\n\n

static char freq_string[11];                  \/\/ string of Frequency<\/p>\n\n\n\n

String SaveMemory;                            \/\/ Frequency in memory<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       Object<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

Preferences preferences;<\/p>\n\n\n\n

LCD_I2C lcd(0x27, 16, 2);<\/p>\n\n\n\n

ADF4351  vfo(PIN_SS, SPI_MODE0, 250000UL , MSBFIRST) ; \/\/ See ADF4351 example<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       SET FRENQUENCY TIO ADF4351<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

void SetFrequency()<\/p>\n\n\n\n

{<\/p>\n\n\n\n

 if ( vfo.setf(strtoul(freq_string,NULL,0)) == 0 )      \/\/ convert and send frequency<\/p>\n\n\n\n

      {                                      <\/p>\n\n\n\n

        Serial.println(\u00ab\u00a0\u00a0\u00bb);<\/p>\n\n\n\n

        Serial.println(\u00ab\u00a0setf() r\u00e9ussi.\u00a0\u00bb);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0VFO CFREQ: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.cfreq) ;<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL INT: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.N_Int);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL FRAC: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.Frac);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL MOD: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.Mod);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL PFD: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.PFDFreq);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL output divider: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.outdiv);<\/p>\n\n\n\n

        Serial.print(\u00ab\u00a0PLL prescaler: \u00ab\u00a0);<\/p>\n\n\n\n

        Serial.println(vfo.Prescaler);<\/p>\n\n\n\n

        Serial.println(\u00ab\u00a0\u00a0\u00bb);<\/p>\n\n\n\n

        \/\/ store new frequency in memory<\/p>\n\n\n\n

        preferences.begin(\u00ab\u00a0adf4351\u00a0\u00bb, false);<\/p>\n\n\n\n

        preferences.putString(\u00ab\u00a0frequency\u00a0\u00bb, freq_string);<\/p>\n\n\n\n

        Serial.println(\u00ab\u00a0Actual: \u00a0\u00bb + preferences.getString(\u00ab\u00a0AutoManS\u00a0\u00bb, \u00ab\u00a00\u00a0\u00bb));<\/p>\n\n\n\n

        preferences.end();<\/p>\n\n\n\n

      }<\/p>\n\n\n\n

      else Serial.println(\u00ab\u00a0Erreur de setf()\u00a0\u00bb) ;    <\/p>\n\n\n\n

}<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       UPDATE LCD<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

void LCD_Update()<\/p>\n\n\n\n

{<\/p>\n\n\n\n

  static char buff[16];<\/p>\n\n\n\n

  sprintf(buff, \u00ab\u00a0% 10lu\u00a0\u00bb, strtoul(freq_string,NULL,0)); \/\/ %.2f.<\/p>\n\n\n\n

  buff[11] = buff[9];<\/p>\n\n\n\n

  buff[10] = buff[8];<\/p>\n\n\n\n

  buff[9] = buff[7];<\/p>\n\n\n\n

  buff[8] = ‘,’;<\/p>\n\n\n\n

  buff[7] = buff[6];<\/p>\n\n\n\n

  buff[6] = buff[5];<\/p>\n\n\n\n

  buff[5] = buff[4];<\/p>\n\n\n\n

  buff[4] = ‘.’;    <\/p>\n\n\n\n

  buff[3] = buff[3];<\/p>\n\n\n\n

  buff[2] = buff[2];<\/p>\n\n\n\n

  buff[1] = buff[1];<\/p>\n\n\n\n

  buff[0] = buff[0];<\/p>\n\n\n\n

  Serial.print(\u00ab\u00a0frequency :\u00a0\u00bb);<\/p>\n\n\n\n

  Serial.println(buff);<\/p>\n\n\n\n

  lcd.clear();<\/p>\n\n\n\n

  lcd.setCursor(0, 0);<\/p>\n\n\n\n

  lcd.print(\u00ab\u00a0Frequency :\u00a0\u00bb);<\/p>\n\n\n\n

  lcd.setCursor(0, 1);<\/p>\n\n\n\n

  lcd.print(buff);<\/p>\n\n\n\n

  lcd.setCursor(13, 1);<\/p>\n\n\n\n

  lcd.print(\u00ab\u00a0Mhz\u00a0\u00bb);<\/p>\n\n\n\n

}<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       SETUP<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

void setup()<\/p>\n\n\n\n

{<\/p>\n\n\n\n

  Serial.begin(9600);<\/p>\n\n\n\n

  delay(2000);<\/p>\n\n\n\n

  Wire.begin() ;    <\/p>\n\n\n\n

  lcd.begin(&Wire);<\/p>\n\n\n\n

  lcd.display();<\/p>\n\n\n\n

  lcd.backlight();<\/p>\n\n\n\n

  vfo.pwrlevel = 3;  \/\/ amplitude de sortie \u00e0 -4 dBm (valeurs 0, 1, 2, 3 correspondent \u00e0 -4dBm, -1dBm, +2 dBm, +5dBm)<\/p>\n\n\n\n

  vfo.RD2refdouble = 0 ;  \/\/ ref doubleur off<\/p>\n\n\n\n

  vfo.RD1Rdiv2 = 0 ;      \/\/ ref diviseur off<\/p>\n\n\n\n

  vfo.ClkDiv = 150 ;<\/p>\n\n\n\n

  vfo.BandSelClock = 80 ;<\/p>\n\n\n\n

  vfo.RCounter = 1 ;    <\/p>\n\n\n\n

  vfo.ChanStep = steps[2] ;<\/p>\n\n\n\n

  if ( vfo.setrf(10000000UL) ==  0 ) Serial.println(\u00ab\u00a0Fr\u00e9quence de r\u00e9f\u00e9rence Interne 10Mhz OCXO\u00a0\u00bb);<\/p>\n\n\n\n

  else Serial.println(\u00ab\u00a0Erreur de setrf() (fr\u00e9quence de r\u00e9f\u00e9rence)\u00a0\u00bb) ;                    \/\/ Sinon, afficher un message d’erreur<\/p>\n\n\n\n

  vfo.init();<\/p>\n\n\n\n

  vfo.enable();<\/p>\n\n\n\n

  Serial.println(\u00ab\u00a0F4IRX – ADF4351 Synth – 35Mhz -> 4.4Ghz\u00a0\u00bb) ;<\/p>\n\n\n\n

  Serial.println(\u00ab\u00a0=======================================\u00a0\u00bb) ;<\/p>\n\n\n\n

  Serial.println(\u00ab\u00a0Entrez la  Fr\u00e9quence (Hz): et Puissance \u00ab\u00a0) ;<\/p>\n\n\n\n

  lcd.clear();<\/p>\n\n\n\n

  lcd.setCursor(0, 0); \/\/ Or setting the cursor in the desired position.<\/p>\n\n\n\n

  lcd.print(\u00ab\u00a0ADF4351 USB-9600\u00a0\u00bb);<\/p>\n\n\n\n

  lcd.setCursor(0, 1);<\/p>\n\n\n\n

  lcd.print(\u00ab\u00a0Waiting 10MhzRef\u00a0\u00bb);<\/p>\n\n\n\n

  delay(9000);<\/p>\n\n\n\n

  Serial.println(\u00ab\u00a0Please wait for heating and stablize the OCXO Ref 10Mhz\u00a0\u00bb) ;<\/p>\n\n\n\n

  preferences.begin(\u00ab\u00a0adf4351\u00a0\u00bb, false);<\/p>\n\n\n\n

  Serial.println(\u00ab\u00a0Store Frequency : \u00a0\u00bb + preferences.getString(\u00ab\u00a0frequency\u00a0\u00bb, \u00ab\u00a00\u00a0\u00bb));<\/p>\n\n\n\n

  SaveMemory=preferences.getString(\u00ab\u00a0frequency\u00a0\u00bb, \u00ab\u00a00\u00a0\u00bb);<\/p>\n\n\n\n

  SaveMemory.toCharArray(freq_string,11);<\/p>\n\n\n\n

  preferences.end();<\/p>\n\n\n\n

  SetFrequency();<\/p>\n\n\n\n

  LCD_Update();<\/p>\n\n\n\n

}<\/p>\n\n\n\n

\/* ————————————————————————- *<\/p>\n\n\n\n

 *       LOOP<\/p>\n\n\n\n

 * ————————————————————————- *\/<\/p>\n\n\n\n

void loop()<\/p>\n\n\n\n

{<\/p>\n\n\n\n

  static unsigned char i;<\/p>\n\n\n\n

  if (Serial.available() > 0)<\/p>\n\n\n\n

  {    <\/p>\n\n\n\n

    freq_string[i] = Serial.read();<\/p>\n\n\n\n

    if (freq_string[i] == 10)      <\/p>\n\n\n\n

    {<\/p>\n\n\n\n

      freq_string[i] = NULL;  <\/p>\n\n\n\n

      SetFrequency();<\/p>\n\n\n\n

      LCD_Update();<\/p>\n\n\n\n

      Serial.print(\u00ab\u00a0Entrez la Fr\u00e9quence (Hz) {example 135000000 for 135Mhz} : \u00ab\u00a0) ;  <\/p>\n\n\n\n

      i = 0;        <\/p>\n\n\n\n

    }<\/p>\n\n\n\n

    else i++;      <\/p>\n\n\n\n

  }<\/p>\n\n\n\n

}<\/p>\n\n\n\n

ref : https:\/\/github.com\/dfannin\/adf4351<\/a><\/p>\n\n\n\n

Ref : https:\/\/www.youtube.com\/watch?v=vJ-pmoxcYvI&ab_channel=%C3%89lectro-Bidouilleur<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

code : \/* ————————————————————————- *  * Name   : ADF4351 Controled Board 35Mhz-4.4Ghz with 10Mhz OCXO Reference  * Author : St\u00e9phane HELAIEM – F4IRX  * Date   : july 12, 2025  * Purpose: ADF 4351 Synth  * Versions:  *    1.0  : ARDUINO NANO    *    1.1a : Change to ESP32 C3 ( 3.3v […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-595","post","type-post","status-publish","format-standard","hentry","category-projet"],"_links":{"self":[{"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/comments?post=595"}],"version-history":[{"count":3,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/595\/revisions"}],"predecessor-version":[{"id":601,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/595\/revisions\/601"}],"wp:attachment":[{"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/media?parent=595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/categories?post=595"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.f4irx.com\/wordpress\/index.php\/wp-json\/wp\/v2\/tags?post=595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}