#include "si5351.h"
#include "Wire.h"
Si5351 si5351;
void setup()
{
  bool i2c_found;
  // Start serial and initialize the Si5351
  Serial.begin(57600);
  i2c_found = si5351.init(SI5351_CRYSTAL_LOAD_8PF, 25000000, 0);

  if(!i2c_found)
  {
    Serial.println("Device not found on I2C bus!");
  }
  // Set CLK0 to output 1550 KHz...uscita r.f. su CLK0
  si5351.set_freq(155000000ULL, SI5351_CLK1);//1550 Khz onde medie tx...999khz=99900000ULL....1638khz=163800000ULL
  si5351.drive_strength(SI5351_CLK0,SI5351_DRIVE_10ma);//PWR OUT SI5351...2ma=2Mw....8ma=10Mw
  
  // Query a status update and wait a bit to let the Si5351 populate the
  // status flags correctly.
  si5351.update_status();
  delay(500);
}
void loop()
{
  // Read the Status Register and print it every 10 seconds
  si5351.update_status();
  Serial.print("SYS_INIT: ");
  Serial.print(si5351.dev_status.SYS_INIT);
  Serial.print("  LOL_A: ");
  Serial.print(si5351.dev_status.LOL_A);
  Serial.print("  LOL_B: ");
  Serial.print(si5351.dev_status.LOL_B);
  Serial.print("  LOS: ");
  Serial.print(si5351.dev_status.LOS);
  Serial.print("  REVID: ");
  Serial.println(si5351.dev_status.REVID);
  delay(10000);
}
[/code]