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/* WWVB Clock v 1.0
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*
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* A WWVB (NIST Time Code Broadcast) receiving clock powered by an
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* Arduino (ATMega328), a DS1307 Real Time Clock, and a C-Max
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* C-Max CMMR-6P-60 WWVB receiver module.
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*
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* This code builds on Capt.Tagon's code at duinolab.blogspot.com
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* which was a great reference. Specifically, I used almost without change
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* his struct / unsigned long long overlay for the received WWVB Buffer,
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* which apparently in turn draws on DCF77 decoding code by Rudi Niemeijer,
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* Mathias Dalheimer, and "Captain."
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*
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* The RTC (DS1307) interface code builds in part on code by
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* Jon McPhalen (www.jonmcphalen.com)
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*
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* There you have it.
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*
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* This code supports the "Atomic Clock" article in the April 2010 issue
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* of Popular Science. There is also a schematic for this project. There
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* is also WWVB signal simulator code, to facilitate debugging and
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* hacking on this project when the reception of the WWVB signal
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* itself is less than stellar.
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*
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* The code for both the clock and the WWVB simulator, and the schematic
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* are available online at:
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* http://www.popsci.com/diy/article/2010-03/build-clock-uses-atomic-timekeeping
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*
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* and on GitHub at: http://github.com/vinmarshall/WWVB-Clock
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*
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* Version 1.0
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* Notes:
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* - No timezone support in this version. UTC only.
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* - No explicit leapsecond (3 frame marker bits) support in this version.
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* - 24 hour mode only
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*
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*
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* Copyright (c) 2010 Vin Marshall (vlm@2552.com, www.2552.com)
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <stdio.h>
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#include <LiquidCrystal.h>
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#include <Wire.h>
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//
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// Initializations
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// Debugging mode - prints debugging information on the Serial port.
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boolean debug = true;
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// Front Panel Light
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int lightPin = 13;
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// WWVB Receiver Pin
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int wwvbInPin = 2;
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// LCD init
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LiquidCrystal lcd(12, 11, 6, 5, 4, 3);
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// RTC init
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// RTC uses pins Analog4 = SDA, Analog5 = SCL
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// RTC I2C Slave Address
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#define DS1307 0xD0 >> 1
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// RTC Memory Registers
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#define RTC_SECS 0
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#define RTC_MINS 1
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#define RTC_HRS 2
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#define RTC_DAY 3
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#define RTC_DATE 4
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#define RTC_MONTH 5
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#define RTC_YEAR 6
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#define RTC_SQW 7
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// Month abbreviations
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char *months[12] = {
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"Jan",
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"Feb",
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"Mar",
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"Apr",
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"May",
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"Jun",
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"Jul",
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"Aug",
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"Sep",
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"Oct",
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"Nov",
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"Dec"
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};
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// Day of Year to month translation (thanks to Capt.Tagon)
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// End of Month - to calculate Month and Day from Day of Year
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int eomYear[14][2] = {
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{0,0}, // Begin
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{31,31}, // Jan
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{59,60}, // Feb
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{90,91}, // Mar
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{120,121}, // Apr
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{151,152}, // May
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{181,182}, // Jun
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{212,213}, // Jul
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{243,244}, // Aug
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{273,274}, // Sep
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{304,305}, // Oct
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{334,335}, // Nov
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{365,366}, // Dec
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{366,367} // overflow
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};
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//
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// Globals
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// Timing and error recording
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unsigned long pulseStartTime = 0;
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unsigned long pulseEndTime = 0;
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unsigned long frameEndTime = 0;
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unsigned long lastRtcUpdateTime = 0;
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boolean bitReceived = false;
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boolean wasMark = false;
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int framePosition = 0;
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int bitPosition = 1;
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char lastTimeUpdate[17];
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char lastBit = ' ';
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int errors[10] = { 1,1,1,1,1,1,1,1,1,1 };
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int errIdx = 0;
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int bitError = 0;
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boolean frameError = false;
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// RTC clock variables
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byte second = 0x00;
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byte minute = 0x00;
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byte hour = 0x00;
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byte day = 0x00;
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byte date = 0x01;
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byte month = 0x01;
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byte year = 0x00;
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byte ctrl = 0x00;
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// WWVB time variables
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byte wwvb_hour = 0;
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byte wwvb_minute = 0;
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byte wwvb_day = 0;
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byte wwvb_year = 0;
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/* WWVB time format struct - acts as an overlay on wwvbRxBuffer to extract time/date data.
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* This points to a 64 bit buffer wwvbRxBuffer that the bits get inserted into as the
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* incoming data stream is received. (Thanks to Capt.Tagon @ duinolab.blogspot.com)
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*/
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struct wwvbBuffer {
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unsigned long long U12 :4; // no value, empty four bits only 60 of 64 bits used
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unsigned long long Frame :2; // framing
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unsigned long long Dst :2; // dst flags
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unsigned long long Leapsec :1; // leapsecond
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unsigned long long Leapyear :1; // leapyear
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unsigned long long U11 :1; // no value
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unsigned long long YearOne :4; // year (5 -> 2005)
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unsigned long long U10 :1; // no value
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unsigned long long YearTen :4; // year (5 -> 2005)
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unsigned long long U09 :1; // no value
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unsigned long long OffVal :4; // offset value
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unsigned long long U08 :1; // no value
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unsigned long long OffSign :3; // offset sign
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unsigned long long U07 :2; // no value
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unsigned long long DayOne :4; // day ones
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unsigned long long U06 :1; // no value
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unsigned long long DayTen :4; // day tens
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unsigned long long U05 :1; // no value
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unsigned long long DayHun :2; // day hundreds
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unsigned long long U04 :3; // no value
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unsigned long long HourOne :4; // hours ones
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unsigned long long U03 :1; // no value
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unsigned long long HourTen :2; // hours tens
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unsigned long long U02 :3; // no value
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unsigned long long MinOne :4; // minutes ones
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unsigned long long U01 :1; // no value
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unsigned long long MinTen :3; // minutes tens
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};
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struct wwvbBuffer * wwvbFrame;
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unsigned long long receiveBuffer;
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unsigned long long lastFrameBuffer;
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/*
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* setup()
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*
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* uC Initialization
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*/
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void setup() {
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// Debugging information prints to the serial line
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if (debug) { Serial.begin(9600); }
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if (debug) { Serial.println("Ready."); }
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// Initialize the I2C Two Wire Communication for the RTC
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Wire.begin();
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// Set up the LCD's number of rows and columns:
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lcd.begin(16, 2);
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// Setup the light pin
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pinMode(lightPin, OUTPUT);
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digitalWrite(lightPin, HIGH);
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// Print a message to the LCD.
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lcd.clear();
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lcd.setCursor(0, 0);
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lcd.print("WWVB Clock v 1.0");
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lcd.setCursor(0, 1);
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lcd.print("PopSci Apr. 2010");
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delay(5000);
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// Front panel light lights for 10 seconds on a successful frame rcpt.
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digitalWrite(lightPin, LOW);
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// Setup the WWVB Signal In Handling
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pinMode(wwvbInPin, INPUT);
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attachInterrupt(0, wwvbChange, CHANGE);
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// Setup the WWVB Buffer
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lastFrameBuffer = 0;
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receiveBuffer = 0;
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wwvbFrame = (struct wwvbBuffer *) &lastFrameBuffer;
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}
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/*
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* loop()
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*
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* Main program loop
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*/
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void loop() {
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// If we've received another bit, process it
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if (bitReceived == true) {
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processBit();
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}
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// Read from the RTC and update the display 4x per second
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if (millis() - lastRtcUpdateTime > 250) {
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// Snag the RTC time and store it locally
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getRTC();
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// And record the time of this last update.
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lastRtcUpdateTime = millis();
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// Update RTC if there has been a successfully received WWVB Frame
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if (frameEndTime != 0) {
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updateRTC();
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frameEndTime = 0;
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}
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// Update the display
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updateDisplay();
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}
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}
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/*
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* updateDisplay()
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*
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* Update the 2 line x 16 char LCD display
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*/
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void updateDisplay() {
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// Turn off the front panel light marking a successfully
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// received frame after 10 seconds of being on.
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if (bcd2dec(second) >= 10) {
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digitalWrite(lightPin, LOW);
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}
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// Update the LCD
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lcd.clear();
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// Update the first row
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lcd.setCursor(0,0);
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char *time = buildTimeString();
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lcd.print(time);
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// Update the second row
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// Cycle through our list of status messages
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lcd.setCursor(0,1);
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int cycle = bcd2dec(second) / 10; // This gives us 6 slots for messages
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char msg[17]; // 16 chars per line on display
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switch (cycle) {
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// Show the Date
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case 0:
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{
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sprintf(msg, "%s %0.2i 20%0.2i",
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months[bcd2dec(month)-1], bcd2dec(date), bcd2dec(year));
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break;
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}
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// Show the WWVB signal strength based on the # of recent frame errors
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case 1:
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{
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int signal = (10 - sumFrameErrors()) / 2;
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sprintf(msg, "WWVB Signal: %i", signal);
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break;
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}
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// Show LeapYear and LeapSecond Warning bits
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case 2:
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{
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const char *leapyear = ( ((byte) wwvbFrame->Leapyear) == 1)?"Yes":"No";
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const char *leapsec = ( ((byte) wwvbFrame->Leapsec) == 1)?"Yes":"No";
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sprintf(msg, "LY: %s LS: %s", leapyear, leapsec);
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break;
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}
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// Show our Daylight Savings Time status
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case 3:
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{
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switch((byte)wwvbFrame->Dst) {
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case 0:
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sprintf(msg, "DST: No");
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break;
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case 1:
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sprintf(msg, "DST: Ending");
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break;
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case 2:
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sprintf(msg, "DST: Starting");
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break;
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case 3:
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sprintf(msg, "DST: Yes");
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break;
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}
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break;
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}
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// Show the UT1 correction sign and amount
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case 4:
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{
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char sign;
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if ((byte)wwvbFrame->OffSign == 2) {
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sign = '-';
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} else if ((byte)wwvbFrame->OffSign == 5) {
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sign = '+';
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} else {
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sign = '?';
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}
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sprintf(msg, "UT1 %c 0.%i", sign, (byte) wwvbFrame->OffVal);
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break;
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}
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// Show the time and date of the last successfully received
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// wwvb frame
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case 5:
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{
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sprintf(msg, "[%s]", lastTimeUpdate);
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break;
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}
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}
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lcd.print(msg);
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}
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/*
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* buildTimeString
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*
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* Prepare the string for displaying the time on line 1 of the LCD
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*/
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char* buildTimeString() {
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char rv[255];
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sprintf(rv,"%0.2i:%0.2i:%0.2i UTC %c",
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bcd2dec(hour),
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bcd2dec(minute),
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bcd2dec(second),
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lastBit);
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return rv;
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}
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/*
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* getRTC
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*
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* Read data from the DS1307 RTC over the I2C 2 wire interface.
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* Data is stored in the uC's global clock variables.
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*/
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void getRTC() {
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// Begin the Transmission
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Wire.beginTransmission(DS1307);
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// Point the request at the first register (seconds)
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Wire.send(RTC_SECS);
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// End the Transmission and Start Listening
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Wire.endTransmission();
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Wire.requestFrom(DS1307, 8);
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second = Wire.receive();
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minute = Wire.receive();
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hour = Wire.receive();
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day = Wire.receive();
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date = Wire.receive();
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month = Wire.receive();
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year = Wire.receive();
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ctrl = Wire.receive();
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}
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/*
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* setRTC
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*
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* Set the DS1307 RTC over the I2C 2 wire interface.
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* Data is read from the uC's global clock variables.
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*/
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void setRTC() {
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// Begin the Transmission
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Wire.beginTransmission(DS1307);
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// Start at the beginning
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Wire.send(RTC_SECS);
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// Send data for each register in order
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Wire.send(second);
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Wire.send(minute);
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Wire.send(hour);
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Wire.send(day);
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Wire.send(date);
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Wire.send(month);
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Wire.send(year);
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Wire.send(ctrl);
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// End the transmission
|
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Wire.endTransmission();
|
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}
|
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|
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/*
|
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* updateRTC
|
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*
|
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* Update the time stored in the RTC to match the received WWVB frame.
|
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*/
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void updateRTC() {
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// Find out how long since the frame's On Time Marker (OTM)
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// We'll need this adjustment when we set the time.
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unsigned int timeSinceFrame = millis() - frameEndTime;
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byte secondsSinceFrame = timeSinceFrame / 1000;
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if (timeSinceFrame % 1000 > 500) {
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secondsSinceFrame++;
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}
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// The OTM for a minute comes at the beginning of the frame, meaning that
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// the WWVB time we have is now 1 minute + `secondsSinceFrame` seconds old.
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incrementWwvbMinute();
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// Set up data for the RTC clock write
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second = secondsSinceFrame;
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minute = ((byte) wwvbFrame->MinTen << 4) + (byte) wwvbFrame->MinOne;
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hour = ((byte) wwvbFrame->HourTen << 4) + (byte) wwvbFrame->HourOne;
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day = 0; // we're not using day of week at this time.
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// Translate wwvb day of year into a month and a day of month
|
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// This routine is courtesy of Capt.Tagon
|
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int doy = ((byte) wwvbFrame->DayHun * 100) +
|
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((byte) wwvbFrame->DayTen * 10) +
|
||||
((byte) wwvbFrame->DayOne);
|
||||
|
||||
int i = 0;
|
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byte isLeapyear = (byte) wwvbFrame->Leapyear;
|
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while ( (i < 14) && (eomYear[i][isLeapyear] < doy) ) {
|
||||
i++;
|
||||
}
|
||||
if (i>0) {
|
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date = dec2bcd(doy - eomYear[i-1][isLeapyear]);
|
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month = dec2bcd((i > 12)?1:i);
|
||||
}
|
||||
|
||||
year = ((byte) wwvbFrame->YearTen << 4) + (byte) wwvbFrame->YearOne;
|
||||
|
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// And write the update to the RTC
|
||||
setRTC();
|
||||
|
||||
// Store the time of update for the display status line
|
||||
sprintf(lastTimeUpdate, "%0.2i:%0.2i %0.2i/%0.2i/%0.2i",
|
||||
bcd2dec(hour), bcd2dec(minute), bcd2dec(month),
|
||||
bcd2dec(date), bcd2dec(year));
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* processBit()
|
||||
*
|
||||
* Decode a received pulse. Pulses are decoded according to the
|
||||
* length of time the pulse was in the low state.
|
||||
*/
|
||||
|
||||
void processBit() {
|
||||
|
||||
// Clear the bitReceived flag, as we're processing that bit.
|
||||
bitReceived = false;
|
||||
|
||||
// determine the width of the received pulse
|
||||
unsigned int pulseWidth = pulseEndTime - pulseStartTime;
|
||||
|
||||
// Attempt to decode the pulse into an Unweighted bit (0),
|
||||
// a Weighted bit (1), or a Frame marker.
|
||||
|
||||
// Pulses < 0.2 sec are an error in reception.
|
||||
if (pulseWidth < 100) {
|
||||
buffer(-2);
|
||||
bitError++;
|
||||
wasMark = false;
|
||||
|
||||
// 0.2 sec pulses are an Unweighted bit (0)
|
||||
} else if (pulseWidth < 400) {
|
||||
buffer(0);
|
||||
wasMark = false;
|
||||
|
||||
// 0.5 sec pulses are a Weighted bit (1)
|
||||
} else if (pulseWidth < 700) {
|
||||
buffer(1);
|
||||
wasMark = false;
|
||||
|
||||
// 0.8 sec pulses are a Frame Marker
|
||||
} else if (pulseWidth < 900) {
|
||||
|
||||
// Two Frame Position markers in a row indicate an
|
||||
// end/beginning of frame marker
|
||||
if (wasMark) {
|
||||
|
||||
// For the display update
|
||||
lastBit = '*';
|
||||
if (debug) { Serial.print("*"); }
|
||||
|
||||
// Verify that our position data jives with this being
|
||||
// a Frame start/end marker
|
||||
if ( (framePosition == 6) &&
|
||||
(bitPosition == 60) &&
|
||||
(bitError == 0)) {
|
||||
|
||||
// Process a received frame
|
||||
frameEndTime = pulseStartTime;
|
||||
lastFrameBuffer = receiveBuffer;
|
||||
digitalWrite(lightPin, HIGH);
|
||||
logFrameError(false);
|
||||
|
||||
if (debug) {
|
||||
debugPrintFrame();
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
frameError = true;
|
||||
}
|
||||
|
||||
// Reset the position counters
|
||||
framePosition = 0;
|
||||
bitPosition = 1;
|
||||
wasMark = false;
|
||||
bitError = 0;
|
||||
receiveBuffer = 0;
|
||||
|
||||
// Otherwise, this was just a regular frame position marker
|
||||
} else {
|
||||
|
||||
buffer(-1);
|
||||
wasMark = true;
|
||||
|
||||
}
|
||||
|
||||
// Pulses > 0.8 sec are an error in reception
|
||||
} else {
|
||||
buffer(-2);
|
||||
bitError++;
|
||||
wasMark = false;
|
||||
}
|
||||
|
||||
// Reset everything if we have more than 60 bits in the frame. This means
|
||||
// the frame markers went missing somewhere along the line
|
||||
if (frameError == true || bitPosition > 60) {
|
||||
|
||||
// Debugging
|
||||
if (debug) { Serial.print(" Frame Error\n"); }
|
||||
|
||||
// Reset all of the frame pointers and flags
|
||||
frameError = false;
|
||||
logFrameError(true);
|
||||
framePosition = 0;
|
||||
bitPosition = 1;
|
||||
wasMark = false;
|
||||
bitError = 0;
|
||||
receiveBuffer = 0;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* logFrameError
|
||||
*
|
||||
* Log the error in the buffer that is a window on the past 10 frames.
|
||||
*/
|
||||
|
||||
void logFrameError(boolean err) {
|
||||
|
||||
// Add a 1 to log errors to the buffer
|
||||
int add = err?1:0;
|
||||
errors[errIdx] = add;
|
||||
|
||||
// and move the buffer loop-around pointer
|
||||
if (++errIdx >= 10) {
|
||||
errIdx = 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* sumFrameErrors
|
||||
*
|
||||
* Turn the errors in the frame error buffer into a number useful to display
|
||||
* the quality of reception of late in the status messages. Sums the errors
|
||||
* in the frame error buffer.
|
||||
*/
|
||||
|
||||
int sumFrameErrors() {
|
||||
|
||||
// Sum all of the values in our error buffer
|
||||
int i, rv;
|
||||
for (i=0; i< 10; i++) {
|
||||
rv += errors[i];
|
||||
}
|
||||
|
||||
return rv;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* debugPrintFrame
|
||||
*
|
||||
* Print the decoded frame over the seriail port
|
||||
*/
|
||||
|
||||
void debugPrintFrame() {
|
||||
|
||||
char time[255];
|
||||
byte minTen = (byte) wwvbFrame->MinTen;
|
||||
byte minOne = (byte) wwvbFrame->MinOne;
|
||||
byte hourTen = (byte) wwvbFrame->HourTen;
|
||||
byte hourOne = (byte) wwvbFrame->HourOne;
|
||||
byte dayHun = (byte) wwvbFrame->DayHun;
|
||||
byte dayTen = (byte) wwvbFrame->DayTen;
|
||||
byte dayOne = (byte) wwvbFrame->DayOne;
|
||||
byte yearOne = (byte) wwvbFrame->YearOne;
|
||||
byte yearTen = (byte) wwvbFrame->YearTen;
|
||||
|
||||
byte wwvb_minute = (10 * minTen) + minOne;
|
||||
byte wwvb_hour = (10 * hourTen) + hourOne;
|
||||
byte wwvb_day = (100 * dayHun) + (10 * dayTen) + dayOne;
|
||||
byte wwvb_year = (10 * yearTen) + yearOne;
|
||||
|
||||
sprintf(time, "\nFrame Decoded: %0.2i:%0.2i %0.3i 20%0.2i\n",
|
||||
wwvb_hour, wwvb_minute, wwvb_day, wwvb_year);
|
||||
Serial.print(time);
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* buffer
|
||||
*
|
||||
* Places the received bits in the receive buffer in the order they
|
||||
* were recived. The first received bit goes in the highest order
|
||||
* bit of the receive buffer.
|
||||
*/
|
||||
|
||||
void buffer(int bit) {
|
||||
|
||||
// Process our bits
|
||||
if (bit == 0) {
|
||||
lastBit = '0';
|
||||
if (debug) { Serial.print("0"); }
|
||||
|
||||
} else if (bit == 1) {
|
||||
lastBit = '1';
|
||||
if (debug) { Serial.print("1"); }
|
||||
|
||||
} else if (bit == -1) {
|
||||
lastBit = 'M';
|
||||
if (debug) { Serial.print("M"); }
|
||||
framePosition++;
|
||||
|
||||
} else if (bit == -2) {
|
||||
lastBit = 'X';
|
||||
if (debug) { Serial.print("X"); }
|
||||
}
|
||||
|
||||
// Push the bit into the buffer. The 0s and 1s are the only
|
||||
// ones we care about.
|
||||
if (bit < 0) { bit = 0; }
|
||||
receiveBuffer = receiveBuffer | ( (unsigned long long) bit << (64 - bitPosition) );
|
||||
|
||||
// And increment the counters that keep track of where we are
|
||||
// in the frame.
|
||||
bitPosition++;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* incrementWwvbMinute
|
||||
*
|
||||
* The frame On Time Marker occurs at the beginning of the frame. This means
|
||||
* that the time in the frame is one minute old by the time it has been fully
|
||||
* received. Adding one to the minute can be somewhat complicated, in as much
|
||||
* as it can roll over the successive hours, days, and years in just the right
|
||||
* circumstances. This handles that.
|
||||
*/
|
||||
|
||||
void incrementWwvbMinute() {
|
||||
|
||||
// Increment the Time and Date
|
||||
if (++(wwvbFrame->MinOne) == 10) {
|
||||
wwvbFrame->MinOne = 0;
|
||||
wwvbFrame->MinTen++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->MinTen == 6) {
|
||||
wwvbFrame->MinTen = 0;
|
||||
wwvbFrame->HourOne++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->HourOne == 10) {
|
||||
wwvbFrame->HourOne = 0;
|
||||
wwvbFrame->HourTen++;
|
||||
}
|
||||
|
||||
if ( (wwvbFrame->HourTen == 2) && (wwvbFrame->HourOne == 4) ) {
|
||||
wwvbFrame->HourTen = 0;
|
||||
wwvbFrame->HourOne = 0;
|
||||
wwvbFrame->DayOne++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->DayOne == 10) {
|
||||
wwvbFrame->DayOne = 0;
|
||||
wwvbFrame->DayTen++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->DayTen == 10) {
|
||||
wwvbFrame->DayTen = 0;
|
||||
wwvbFrame->DayHun++;
|
||||
}
|
||||
|
||||
if ( (wwvbFrame->DayHun == 3) &&
|
||||
(wwvbFrame->DayTen == 6) &&
|
||||
(wwvbFrame->DayOne == (6 + (int) wwvbFrame->Leapyear)) ) {
|
||||
// Happy New Year.
|
||||
wwvbFrame->DayHun = 0;
|
||||
wwvbFrame->DayTen = 0;
|
||||
wwvbFrame->DayOne = 1;
|
||||
wwvbFrame->YearOne++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->YearOne == 10) {
|
||||
wwvbFrame->YearOne = 0;
|
||||
wwvbFrame->YearTen++;
|
||||
}
|
||||
|
||||
if (wwvbFrame->YearTen == 10) {
|
||||
wwvbFrame->YearTen = 0;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* wwvbChange
|
||||
*
|
||||
* This is the interrupt servicing routine. Changes in the level of the
|
||||
* received WWVB pulse are recorded here to be processed in processBit().
|
||||
*/
|
||||
|
||||
void wwvbChange() {
|
||||
|
||||
int signalLevel = digitalRead(wwvbInPin);
|
||||
|
||||
// Determine if this was triggered by a rising or a falling edge
|
||||
// and record the pulse low period start and stop times
|
||||
if (signalLevel == LOW) {
|
||||
pulseStartTime = millis();
|
||||
} else {
|
||||
pulseEndTime = millis();
|
||||
bitReceived = true;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* bcd2dec
|
||||
*
|
||||
* Utility function to convert 2 bcd coded hex digits into an integer
|
||||
*/
|
||||
|
||||
int bcd2dec(int bcd) {
|
||||
return ( (bcd>>4) * 10) + (bcd % 16);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* dec2bcd
|
||||
*
|
||||
* Utility function to convert an integer into 2 bcd coded hex digits
|
||||
*/
|
||||
|
||||
int dec2bcd(int dec) {
|
||||
return ( (dec/10) << 4) + (dec % 10);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,175 @@
|
|||
94.34
|
||||
39.62
|
||||
67.36
|
||||
48.64
|
||||
71.57
|
||||
78.93
|
||||
86.80
|
||||
37.59
|
||||
41.87
|
||||
76.45
|
||||
65.54
|
||||
70.19
|
||||
77.87
|
||||
73.15
|
||||
70.13
|
||||
33.27
|
||||
27.52
|
||||
87.68
|
||||
74.66
|
||||
49.75
|
||||
74.90
|
||||
68.83
|
||||
69.74
|
||||
58.10
|
||||
49.23
|
||||
61.75
|
||||
94.63
|
||||
85.94
|
||||
46.70
|
||||
68.18
|
||||
48.62
|
||||
75.80
|
||||
50.17
|
||||
52.28
|
||||
66.22
|
||||
68.36
|
||||
70.89
|
||||
46.68
|
||||
71.96
|
||||
90.99
|
||||
74.44
|
||||
97.34
|
||||
22.63
|
||||
25.14
|
||||
54.39
|
||||
47.70
|
||||
80.27
|
||||
75.28
|
||||
73.23
|
||||
63.09
|
||||
71.75
|
||||
73.39
|
||||
29.64
|
||||
60.99
|
||||
78.13
|
||||
73.29
|
||||
52.33
|
||||
68.42
|
||||
71.71
|
||||
60.31
|
||||
54.13
|
||||
76.60
|
||||
58.99
|
||||
75.99
|
||||
85.64
|
||||
74.30
|
||||
77.69
|
||||
79.76
|
||||
79.61
|
||||
60.93
|
||||
54.99
|
||||
45.50
|
||||
81.65
|
||||
74.05
|
||||
67.01
|
||||
85.79
|
||||
83.92
|
||||
76.03
|
||||
72.04
|
||||
32.79
|
||||
33.62
|
||||
67.26
|
||||
71.17
|
||||
78.02
|
||||
63.84
|
||||
67.86
|
||||
58.04
|
||||
71.88
|
||||
72.92
|
||||
72.11
|
||||
68.45
|
||||
68.71
|
||||
93.77
|
||||
65.92
|
||||
78.33
|
||||
63.78
|
||||
58.41
|
||||
48.74
|
||||
71.87
|
||||
53.10
|
||||
80.33
|
||||
58.18
|
||||
72.19
|
||||
79.94
|
||||
85.44
|
||||
78.55
|
||||
82.78
|
||||
71.12
|
||||
63.79
|
||||
62.94
|
||||
63.66
|
||||
58.44
|
||||
50.59
|
||||
91.02
|
||||
89.28
|
||||
68.35
|
||||
86.34
|
||||
31.90
|
||||
69.33
|
||||
65.45
|
||||
76.41
|
||||
83.79
|
||||
73.95
|
||||
73.08
|
||||
60.52
|
||||
51.60
|
||||
59.42
|
||||
82.91
|
||||
82.62
|
||||
64.72
|
||||
69.13
|
||||
67.46
|
||||
71.94
|
||||
78.55
|
||||
73.33
|
||||
70.58
|
||||
80.87
|
||||
77.23
|
||||
75.79
|
||||
87.83
|
||||
88.32
|
||||
79.55
|
||||
60.92
|
||||
71.68
|
||||
69.79
|
||||
83.03
|
||||
89.25
|
||||
76.60
|
||||
55.45
|
||||
67.67
|
||||
82.52
|
||||
77.72
|
||||
65.99
|
||||
60.15
|
||||
73.46
|
||||
68.14
|
||||
61.96
|
||||
85.54
|
||||
64.17
|
||||
83.86
|
||||
61.66
|
||||
79.66
|
||||
64.02
|
||||
45.70
|
||||
76.10
|
||||
63.10
|
||||
64.77
|
||||
94.71
|
||||
76.37
|
||||
75.78
|
||||
76.00
|
||||
35.66
|
||||
65.96
|
||||
68.23
|
||||
91.41
|
||||
|
File diff suppressed because it is too large
Load Diff
|
|
@ -1,110 +1,405 @@
|
|||
/*
|
||||
ESP8266 Blink by Simon Peter
|
||||
Blink the blue LED on the ESP-01 module
|
||||
This example code is in the public domain
|
||||
|
||||
The blue LED on the ESP-01 module is connected to GPIO1
|
||||
(which is also the TXD pin; so we cannot use Serial.print() at the same time)
|
||||
|
||||
Note that this sketch uses LED_BUILTIN to find the pin with the internal LED
|
||||
*/
|
||||
#include <LiquidCrystal_I2C.h>
|
||||
LiquidCrystal_I2C lcd(0x27, 16, 2);
|
||||
|
||||
#define SERIAL_RATE 115200
|
||||
#define WWV_SIGNAL_PIN 14
|
||||
#define PPS_OUTPUT_PIN 16
|
||||
#define LOSC_INPUT_PIN 0
|
||||
#define DEBUG1_OUTPUT_PIN 15
|
||||
|
||||
void ICACHE_RAM_ATTR readLevel();
|
||||
#define ONEBIT 1
|
||||
#define ZEROBIT 2
|
||||
#define MARKBIT 3
|
||||
|
||||
volatile byte wwvbInState; // store receiver signal level
|
||||
#define NUM_SAMPLES_PER_FRAME 32000
|
||||
#define CLOCKS_PER_MS 32
|
||||
|
||||
byte prevWwvbInState; // store previous signal level
|
||||
unsigned int prevEdgeMillis; // store time signal was read
|
||||
byte bitVal; // bit decoded 0, 1 or Mark
|
||||
byte badBit; // bad bit, noise detected
|
||||
byte prevMark; // store previous mark bit
|
||||
char statusString[25] = "LOS";
|
||||
|
||||
volatile unsigned int lowLatencyInState;
|
||||
volatile unsigned int wwvbInState;
|
||||
volatile unsigned int lastWWVBInState;
|
||||
|
||||
volatile unsigned int stateStableCounter = 0;
|
||||
volatile unsigned int stateStableMillis = 0;
|
||||
volatile unsigned int lastStateStableMillis = 0;
|
||||
|
||||
volatile unsigned int secondCounter = 0;
|
||||
volatile unsigned int milliCounter = 0;
|
||||
volatile unsigned int clockCounter = 0;
|
||||
|
||||
volatile unsigned int timeToTick = 0;
|
||||
volatile unsigned int frameReadyToStart = 0;
|
||||
volatile unsigned int beginFrameSearch = 0;
|
||||
volatile unsigned int frameSamples = 0;
|
||||
volatile unsigned int lossOfSignal = 1;
|
||||
volatile unsigned int displayUpdateRequired = 1;
|
||||
volatile unsigned int frameSearch = 0;
|
||||
volatile unsigned int frameStart = 0;
|
||||
volatile unsigned int frameStartTime = 0;
|
||||
volatile unsigned int frameHigh = 0;
|
||||
volatile unsigned int frameHighReadOut = 0;
|
||||
volatile unsigned int frameLow = 0;
|
||||
volatile unsigned int frameLowReadOut = 0;
|
||||
volatile unsigned int frameCounter = 0;
|
||||
volatile unsigned int frameReadyForRead = 0;
|
||||
volatile unsigned int lastBitReceived = 0;
|
||||
volatile unsigned int millisSinceBoot = 0;
|
||||
volatile unsigned int ppsActivationTime;
|
||||
volatile unsigned int millisSinceSignalStateChange = 0;
|
||||
volatile unsigned int minuteSync = 0;
|
||||
|
||||
void ICACHE_RAM_ATTR WWVFallingEdge();
|
||||
void ICACHE_RAM_ATTR OSCEdge();
|
||||
void ICACHE_RAM_ATTR MilliEdge();
|
||||
void ICACHE_RAM_ATTR SecondEdge();
|
||||
|
||||
void setup() {
|
||||
pinMode(LED_BUILTIN, OUTPUT); // Initialize the LED_BUILTIN pin as an output
|
||||
pinMode(LED_BUILTIN, OUTPUT);
|
||||
pinMode(PPS_OUTPUT_PIN, OUTPUT);
|
||||
pinMode(DEBUG1_OUTPUT_PIN, OUTPUT);
|
||||
pinMode(WWV_SIGNAL_PIN, INPUT);
|
||||
attachInterrupt(digitalPinToInterrupt(WWV_SIGNAL_PIN), readLevel, CHANGE); // fire interrupt on edge detected
|
||||
Serial.begin(9600);
|
||||
Serial.print("herro booted\n");
|
||||
pinMode(LOSC_INPUT_PIN, INPUT);
|
||||
attachInterrupt(digitalPinToInterrupt(LOSC_INPUT_PIN), OSCEdge, RISING);
|
||||
lcd.init();
|
||||
lcd.backlight();
|
||||
lcd.setCursor(0, 0);
|
||||
lcd.print("booting");
|
||||
Serial.begin(SERIAL_RATE);
|
||||
Serial.print("\n\n************\n\nherro booted\n");
|
||||
ppsActivationTime = millis();
|
||||
}
|
||||
|
||||
void OSCEdge() {
|
||||
clockCounter++;
|
||||
if(clockCounter > CLOCKS_PER_MS) {
|
||||
clockCounter -= CLOCKS_PER_MS;
|
||||
|
||||
// *****************************************************************************
|
||||
// LOW LATENCY HACK to respond in 1/32nd of a ms to a falling
|
||||
// start-of-second edge
|
||||
// respond really fast to a falling edge if in the frameReadyToStart
|
||||
// state
|
||||
lowLatencyInState = digitalRead(WWV_SIGNAL_PIN);
|
||||
if(!lowLatencyInState && frameReadyToStart && !lossOfSignal && !frameStart) {
|
||||
// TICK!
|
||||
// falling edge, beginning of a new frame and second
|
||||
digitalWrite(PPS_OUTPUT_PIN, 1);
|
||||
timeToTick = 1;
|
||||
frameStart = 1;
|
||||
frameStartTime = millisSinceBoot;
|
||||
frameReadyToStart = 0;
|
||||
frameSearch = 0;
|
||||
}
|
||||
// *****************************************************************************
|
||||
MilliEdge();
|
||||
}
|
||||
}
|
||||
|
||||
void SecondEdge() {
|
||||
secondCounter++;
|
||||
displayUpdateRequired = 1;
|
||||
}
|
||||
|
||||
void MilliEdge() {
|
||||
digitalWrite(DEBUG1_OUTPUT_PIN, 1);
|
||||
wwvbInState = digitalRead(WWV_SIGNAL_PIN);
|
||||
|
||||
milliCounter++;
|
||||
millisSinceBoot++;
|
||||
|
||||
if(milliCounter > 1000) {
|
||||
milliCounter -= 1000;
|
||||
SecondEdge();
|
||||
}
|
||||
|
||||
if(wwvbInState == lastWWVBInState) {
|
||||
stateStableMillis++;
|
||||
|
||||
if(stateStableMillis > 1000) {
|
||||
stateStableMillis = 1000;
|
||||
}
|
||||
|
||||
} else {
|
||||
|
||||
//edge of some sort.
|
||||
lastStateStableMillis = stateStableMillis;
|
||||
// if it's a falling edge
|
||||
if(!wwvbInState && (stateStableMillis > 100) && (stateStableMillis < 2000)) {
|
||||
// main screen turn on
|
||||
lossOfSignal = 0;
|
||||
frameSearch = 1;
|
||||
}
|
||||
stateStableMillis = 0;
|
||||
}
|
||||
|
||||
lastWWVBInState = wwvbInState; // copy/save for next loop
|
||||
|
||||
if((stateStableMillis > 2000) && !lossOfSignal) {
|
||||
// we have received nothing for 2 seconds, loss of signal:
|
||||
lossOfSignal = 1;
|
||||
frameStart = 0;
|
||||
frameCounter = 0;
|
||||
minuteSync = 0;
|
||||
digitalWrite(DEBUG1_OUTPUT_PIN, 0);
|
||||
return;
|
||||
}
|
||||
|
||||
if(frameSearch && wwvbInState) {
|
||||
// if we have been high for 100ms (frameSearch) we are ready to start a new frame on the mark
|
||||
frameHigh = 0;
|
||||
frameLow = 0;
|
||||
frameReadyToStart = 1;
|
||||
digitalWrite(DEBUG1_OUTPUT_PIN, 0);
|
||||
return;
|
||||
}
|
||||
|
||||
if (frameStart && (frameSamples < NUM_SAMPLES_PER_FRAME)) {
|
||||
//begin sampling
|
||||
if (wwvbInState) {
|
||||
frameHigh++;
|
||||
} else {
|
||||
frameLow++;
|
||||
}
|
||||
frameSamples++;
|
||||
digitalWrite(DEBUG1_OUTPUT_PIN, 0);
|
||||
return;
|
||||
}
|
||||
|
||||
if(frameStart && (frameSamples >= NUM_SAMPLES_PER_FRAME)) {
|
||||
frameReadyForRead = 1;
|
||||
frameHighReadOut = frameHigh;
|
||||
frameLowReadOut = frameLow;
|
||||
frameStart = 0;
|
||||
frameHigh = 0;
|
||||
frameLow = 0;
|
||||
frameSamples = 0;
|
||||
}
|
||||
digitalWrite(DEBUG1_OUTPUT_PIN, 0);
|
||||
}
|
||||
|
||||
char pb[255];
|
||||
// the loop function runs over and over again forever
|
||||
void loop() {
|
||||
if (wwvbInState != prevWwvbInState) {
|
||||
pulseValue();
|
||||
prevWwvbInState = wwvbInState;
|
||||
}
|
||||
yield();
|
||||
}
|
||||
digitalWrite(LED_BUILTIN, !wwvbInState);
|
||||
|
||||
void pulseValue() {
|
||||
unsigned int edgeMillis = millis(); // save current time
|
||||
badBit = 0; // set noise counter to zero
|
||||
if (wwvbInState == 1) { // rising edge
|
||||
prevEdgeMillis = edgeMillis; // set previous time to current
|
||||
if(timeToTick) {
|
||||
Serial.println("*** TICK in loop()");
|
||||
timeToTick = 0;
|
||||
TickSecond();
|
||||
}
|
||||
else { // falling edge
|
||||
int pulseLength = edgeMillis - prevEdgeMillis; // calculate pulse length millis
|
||||
if (pulseLength < 100) { // less than 100ms, noise pulses
|
||||
badBit = 1;
|
||||
}
|
||||
else if (pulseLength < 400) { // 800ms carrier drop mark
|
||||
bitVal = 2;
|
||||
}
|
||||
else if (pulseLength < 700) { // 500ms carrier drop one
|
||||
bitVal = 1;
|
||||
}
|
||||
else { // 200ms carrier drop zero
|
||||
bitVal = 0;
|
||||
}
|
||||
if (badBit == 0) {
|
||||
printBitVal();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void readLevel() {
|
||||
wwvbInState = digitalRead(WWV_SIGNAL_PIN); // read signal level
|
||||
digitalWrite(LED_BUILTIN, !wwvbInState); // flash WWVB receiver indicator pin
|
||||
yield();
|
||||
|
||||
}
|
||||
|
||||
|
||||
void printBitVal() {
|
||||
if ((bitVal == 2) && (prevMark == 0)) {
|
||||
Serial.print(" : ");
|
||||
|
||||
prevMark = 1;
|
||||
if(frameReadyForRead) {
|
||||
Serial.println("*** processFrame() in loop()");
|
||||
frameReadyForRead = 0;
|
||||
processFrame();
|
||||
}
|
||||
else if ((bitVal == 2) && (prevMark == 1)) {
|
||||
Serial.print("\nBit Value: ");
|
||||
Serial.print("| ");
|
||||
|
||||
prevMark = 0;
|
||||
}
|
||||
else {
|
||||
Serial.print(bitVal, DEC);
|
||||
prevMark = 0;
|
||||
yield();
|
||||
|
||||
PPSLowIfRequired();
|
||||
|
||||
yield();
|
||||
|
||||
if (displayUpdateRequired) {
|
||||
Serial.println("*** updateDisplay() in loop()");
|
||||
sprintf(pb,"*** secondCounter=%d\n", secondCounter);
|
||||
Serial.print(pb);
|
||||
updateDisplay();
|
||||
displayUpdateRequired = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/*****************************************************************************
|
||||
* Time display functions
|
||||
*****************************************************************************/
|
||||
|
||||
void printTime() {
|
||||
Serial.print("?x00?y0?f"); // movie cursor to line 1 char 1, clear screen
|
||||
void SetPPSHigh() {
|
||||
digitalWrite(PPS_OUTPUT_PIN, 1);
|
||||
}
|
||||
|
||||
// LCD routines to initialize LCD and clear screen
|
||||
void lcdInit() { // using P H Anderson Serial LCD driver board
|
||||
Serial.print("?G216"); // configure driver for 2 x 16 LCD
|
||||
delay(300);
|
||||
Serial.print("?BDD"); // set backlight brightness
|
||||
delay(300);
|
||||
Serial.print("?f"); // clear screen
|
||||
Serial.print("?c0"); // set cursor off
|
||||
void SetPPSLow() {
|
||||
digitalWrite(PPS_OUTPUT_PIN, 0);
|
||||
}
|
||||
|
||||
void SendPPS() {
|
||||
unsigned int tickInterval = millisSinceBoot - ppsActivationTime;
|
||||
ppsActivationTime = millisSinceBoot;
|
||||
SetPPSHigh();
|
||||
}
|
||||
|
||||
void PPSLowIfRequired() {
|
||||
if ((millisSinceBoot - ppsActivationTime) > 500) {
|
||||
SetPPSLow();
|
||||
}
|
||||
}
|
||||
|
||||
void TickSecond() {
|
||||
char buf[255];
|
||||
sprintf(buf, "TICK(%d): WWVB going low after %d ms high\n", frameCounter, lastStateStableMillis);
|
||||
SendPPS();
|
||||
Serial.print(buf);
|
||||
}
|
||||
|
||||
void processFrame() {
|
||||
char buf[255];
|
||||
sprintf(buf, "end of frame summary: frameHigh: %d, frameLow: %d\n", frameHighReadOut, frameLowReadOut);
|
||||
Serial.print(buf);
|
||||
float rawVal = (float)frameHighReadOut / frameLowReadOut;
|
||||
rawVal *= 1000;
|
||||
unsigned int intRawVal = (int)rawVal;
|
||||
if (intRawVal > 100000) {
|
||||
intRawVal = 100000;
|
||||
}
|
||||
displayUpdateRequired++;
|
||||
registerBit(convertDutyCycleToBit(intRawVal));
|
||||
}
|
||||
|
||||
int convertDutyCycleToBit(unsigned int rawVal) {
|
||||
char buf[255];
|
||||
/*
|
||||
|
||||
20% - marker
|
||||
50% - one bit
|
||||
80% - zero bit
|
||||
our cutoff points will be 50% and 80%
|
||||
*/
|
||||
char bitbuf[20];
|
||||
|
||||
int output = 0;
|
||||
output = ZEROBIT;
|
||||
sprintf(bitbuf, "ZERO");
|
||||
|
||||
if (rawVal > 20000) {
|
||||
output = MARKBIT;
|
||||
sprintf(bitbuf, "MARK");
|
||||
}
|
||||
|
||||
if (rawVal > 30000) {
|
||||
output = ONEBIT;
|
||||
sprintf(bitbuf, "ONE");
|
||||
}
|
||||
|
||||
sprintf(buf, "frame rawVal=%d, bit=%s\n", rawVal, bitbuf);
|
||||
Serial.print(buf);
|
||||
return output;
|
||||
}
|
||||
|
||||
void registerBit(int doot) {
|
||||
if (minuteSync) {
|
||||
frameCounter++;
|
||||
}
|
||||
|
||||
if (doot == MARKBIT) {
|
||||
if (lastBitReceived == MARKBIT) {
|
||||
// two mark bits in a row means we are in the first second of the minute
|
||||
frameCounter = 0;
|
||||
minuteSync = 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (!minuteSync) {
|
||||
frameCounter = 0;
|
||||
}
|
||||
|
||||
sanityCheckFrame(doot);
|
||||
lastBitReceived = doot;
|
||||
logBit(doot);
|
||||
}
|
||||
|
||||
void logBit(int doot) {
|
||||
|
||||
}
|
||||
|
||||
void lossOfSync(int errorFrame) {
|
||||
char buf[255];
|
||||
sprintf(buf, "ERROR: %d bit incorrect for framing, loss of sync!\n", errorFrame);
|
||||
Serial.print(buf);
|
||||
minuteSync = 0;
|
||||
displayUpdateRequired++;
|
||||
}
|
||||
|
||||
|
||||
void sanityCheckFrame(int doot) {
|
||||
if (
|
||||
(
|
||||
(frameCounter == 9)
|
||||
||
|
||||
(frameCounter == 19)
|
||||
||
|
||||
(frameCounter == 29)
|
||||
||
|
||||
(frameCounter == 39)
|
||||
||
|
||||
(frameCounter == 49)
|
||||
)
|
||||
&& doot != MARKBIT) {
|
||||
lossOfSync(frameCounter);
|
||||
}
|
||||
|
||||
if (
|
||||
(doot == MARKBIT)
|
||||
&&
|
||||
(
|
||||
(frameCounter != 0)
|
||||
&&
|
||||
(frameCounter != 9)
|
||||
&&
|
||||
(frameCounter != 19)
|
||||
&&
|
||||
(frameCounter != 29)
|
||||
&&
|
||||
(frameCounter != 39)
|
||||
&&
|
||||
(frameCounter != 49)
|
||||
)
|
||||
) {
|
||||
lossOfSync(frameCounter);
|
||||
}
|
||||
}
|
||||
|
||||
void updateDisplay() {
|
||||
//Serial.print("updateDisplay()\n");
|
||||
|
||||
if (frameStart) {
|
||||
// don't do anything if we are currently sampling.
|
||||
return;
|
||||
}
|
||||
|
||||
if (lossOfSignal) {
|
||||
sprintf(statusString, "LOS");
|
||||
}
|
||||
|
||||
if (millisSinceBoot - frameStartTime < 10000) {
|
||||
sprintf(statusString, "RX(syncing)");
|
||||
}
|
||||
if (minuteSync) {
|
||||
sprintf(statusString, "RX(bit %d)", frameCounter);
|
||||
}
|
||||
|
||||
char d[20];
|
||||
|
||||
if (lastBitReceived == MARKBIT) {
|
||||
sprintf(d, "%d=MARK", frameCounter);
|
||||
}
|
||||
if (lastBitReceived == ONEBIT) {
|
||||
sprintf(d, "%d=ONE ", frameCounter);
|
||||
}
|
||||
if (lastBitReceived == ZEROBIT) {
|
||||
sprintf(d, "%d=ZERO", frameCounter);
|
||||
}
|
||||
|
||||
lcd.clear();
|
||||
lcd.setCursor(0, 0);
|
||||
char msg[20];
|
||||
sprintf(msg, "up:%03d", millisSinceBoot/1000);
|
||||
lcd.print(msg);
|
||||
lcd.setCursor(0, 1);
|
||||
sprintf(msg, "s:%s", statusString);
|
||||
lcd.print(msg);
|
||||
|
||||
|
||||
if (minuteSync) {
|
||||
lcd.setCursor(10, 0);
|
||||
lcd.print(d);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue