si5351_vcxo.ino

/*
 * si5351_vcxo.ino - Example for using the Si5351B VCXO functions 
 * with Si5351Arduino library
 *
 * Copyright (C) 2015 Jason Milldrum <milldrum@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "si5351.h"
#include "Wire.h"

Si5351 si5351;

void setup()
{
  // Start serial and initialize the Si5351
  Serial.begin(57600);
  si5351.init(SI5351_CRYSTAL_LOAD_8PF, 0, 250000);

  // Set VCXO osc to 876 MHz (146 MHz x 6), 40 ppm pull
  si5351.set_vcxo(87600000000ULL, 40);

  // Set CLK0 to be locked to VCXO
  si5351.set_ms_source(SI5351_CLK0, SI5351_PLLB);

  // Tune to 146 MHz center frequency
  si5351.set_freq_manual(14600000000ULL, 87600000000ULL, SI5351_CLK0);
  
  si5351.update_status();
  delay(500);
}

void loop()
{
  // Read the Status Register and print it every 10 seconds
  si5351.update_status();
  Serial.print("corr: ");
  Serial.print(si5351.get_correction());
  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);
}