MSF_Time.h

00001 /*This library will decode an MSF signal on a digital input pin and turn it 
00002 into a timestamp.
00003 Copyright (C) 2017 Duncan Wood
00004 
00005 This library is free software; you can redistribute it and/or
00006 modify it under the terms of the GNU Lesser General Public
00007 License as published by the Free Software Foundation; either
00008 version 2.1 of the License, or (at your option) any later version.
00009 
00010 This library is distributed in the hope that it will be useful,
00011 but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 Lesser General Public License for more details.
00014 
00015 You should have received a copy of the GNU Lesser General Public
00016 License along with this library; if not, write to the Free Software
00017 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00018 */
00019 
00020 
00021 
00022 #include "mbed.h"
00023 class MSF_Time
00024 {
00025 public:
00026 /* Start MSF_Time with this function
00027 InputPin is the data coming from your reciever
00028  Polarity is 0 if your receiver output is high for no carrier
00029  polarity is 1 to invert this logic. */
00030  
00031  
00032 MSF_Time(PinName InputPin, int polarity,int OffsetTuning =48000);
00033 
00034 bool Valid(); // Is the time valid
00035 time_t Read();
00036 
00037 protected:
00038 struct MSF_Data {
00039     int BCDYear;
00040     int BCDMonth;
00041     int DayOfWeek;
00042     int BCDTime;
00043     int SyncByte;  //This is sent and allows you to detect leap seconds
00044     int DUT;
00045     int BST;
00046 };
00047 
00048 struct MSF_Data MyData;    
00049 struct tm Received_Time; // Normal data coming in
00050 time_t Received_timestamp;  //Data converted to timestamp
00051 unsigned int Time_Data_Duration; //Pulse length - The minute marker is 500ms
00052 bool Time_Data_Sync;  // True when a 500ms pulse is detected denoting the start of a minute
00053 Ticker Time_Data_Ticker;  // A 50ms clock used to clock in data
00054 unsigned int Time_Data_Count;//  counts the 50ms for clocking in the data
00055 void Time_Data_Strobe(); // When the ticker ticks do this
00056 void Falling();
00057 void Rising();
00058 bool DataValid;
00059 Timeout offset; // used to fine tune the seconds 50ms equals zero offset
00060 InterruptIn Time_Data;
00061 DigitalIn MyInput;
00062 int Polarity;
00063 int OffsetTuning;
00064 Timer Time_Data_timer;
00065 void LogicOne();
00066 void LogicZero();
00067 int ParityCheck(unsigned int CheckMe);
00068 void ProcessData();
00069 void IncrementSeconds();
00070 void IncrementSecondsNow();
00071 //int const OffsetTuning=48000; //in microseconds
00072 bool debug;  //turn on off debugging noise
00073 bool DV;
00074 
00075 };