Andrew Boyson / Mbed 2 deprecated iot

Backing up an unused program in case of future need

Dependencies:   mbed

time.cpp@7:024ace6d943c, 2016-06-02 (annotated)

Committer:
andrewboyson
Date:
Thu Jun 02 09:26:28 2016 +0000
Revision:
7:024ace6d943c
Parent:
6:be97d38e0b01
Child:
8:45a0205a298f
Added a routine to break time_t into a struct tm without using gmtime as that did not seem to work.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 0:09f915e6f9f6 1 #include "mbed.h"
andrewboyson 0:09f915e6f9f6 2 #define ONE_MILLION 1000000
andrewboyson 0:09f915e6f9f6 3
andrewboyson 6:be97d38e0b01 4 static Ticker ticker;
andrewboyson 6:be97d38e0b01 5 static volatile uint64_t unixTime16ths;
andrewboyson 0:09f915e6f9f6 6 static void tick(void)
andrewboyson 0:09f915e6f9f6 7 {
andrewboyson 0:09f915e6f9f6 8 unixTime16ths++;
andrewboyson 0:09f915e6f9f6 9 }
andrewboyson 0:09f915e6f9f6 10 void TimeSet(uint32_t t)
andrewboyson 0:09f915e6f9f6 11 {
andrewboyson 0:09f915e6f9f6 12 unixTime16ths = (uint64_t)t << 4;
andrewboyson 0:09f915e6f9f6 13 }
andrewboyson 0:09f915e6f9f6 14 uint32_t TimeGet()
andrewboyson 0:09f915e6f9f6 15 {
andrewboyson 0:09f915e6f9f6 16 return unixTime16ths >> 4;
andrewboyson 0:09f915e6f9f6 17 }
andrewboyson 0:09f915e6f9f6 18 void TimeSet16ths(uint64_t t)
andrewboyson 0:09f915e6f9f6 19 {
andrewboyson 0:09f915e6f9f6 20 unixTime16ths = t;
andrewboyson 0:09f915e6f9f6 21 }
andrewboyson 0:09f915e6f9f6 22 uint64_t TimeGet16ths()
andrewboyson 0:09f915e6f9f6 23 {
andrewboyson 0:09f915e6f9f6 24 return unixTime16ths;
andrewboyson 6:be97d38e0b01 25 }
andrewboyson 7:024ace6d943c 26 void TimeToTm(uint32_t time, struct tm* ptm)
andrewboyson 7:024ace6d943c 27 {
andrewboyson 7:024ace6d943c 28 int seconds = time % 60; time /= 60;
andrewboyson 7:024ace6d943c 29 int minutes = time % 60; time /= 60;
andrewboyson 7:024ace6d943c 30 int hours = time % 24; time /= 24;
andrewboyson 7:024ace6d943c 31 int daysLeft = time;
andrewboyson 7:024ace6d943c 32
andrewboyson 7:024ace6d943c 33 //Add a year at a time while there is more than a year of days left
andrewboyson 7:024ace6d943c 34 int year = 1970; //Unix epoch is 1970
andrewboyson 7:024ace6d943c 35 int dayOfWeek = 4; //1 Jan 1970 is a Thursday
andrewboyson 7:024ace6d943c 36 int dayOfYear;
andrewboyson 7:024ace6d943c 37 int leapYear;
andrewboyson 7:024ace6d943c 38 while(1)
andrewboyson 7:024ace6d943c 39 {
andrewboyson 7:024ace6d943c 40 //See if it is a leap year
andrewboyson 7:024ace6d943c 41 int year4 = !(year % 4);
andrewboyson 7:024ace6d943c 42 int year100 = !(year % 100);
andrewboyson 7:024ace6d943c 43 int year400 = !(year % 400);
andrewboyson 7:024ace6d943c 44 leapYear = false;
andrewboyson 7:024ace6d943c 45 if (year4) leapYear = true;
andrewboyson 7:024ace6d943c 46 if (year100) leapYear = false;
andrewboyson 7:024ace6d943c 47 if (year400) leapYear = true;
andrewboyson 7:024ace6d943c 48
andrewboyson 7:024ace6d943c 49 //Find the number of days in this year
andrewboyson 7:024ace6d943c 50 int daysInYear = leapYear ? 366 : 365;
andrewboyson 7:024ace6d943c 51
andrewboyson 7:024ace6d943c 52 //Stop if this is the final year
andrewboyson 7:024ace6d943c 53 if (daysLeft < daysInYear) break;
andrewboyson 7:024ace6d943c 54
andrewboyson 7:024ace6d943c 55 //Calculate the current day of the week at the start of the year
andrewboyson 7:024ace6d943c 56 dayOfWeek += leapYear ? 2 : 1;
andrewboyson 7:024ace6d943c 57 if (dayOfWeek >= 7) dayOfWeek -= 7;
andrewboyson 7:024ace6d943c 58
andrewboyson 7:024ace6d943c 59 //Move on to the next year
andrewboyson 7:024ace6d943c 60 daysLeft -= daysInYear;
andrewboyson 7:024ace6d943c 61 year++;
andrewboyson 7:024ace6d943c 62 }
andrewboyson 7:024ace6d943c 63
andrewboyson 7:024ace6d943c 64 dayOfYear = daysLeft;
andrewboyson 7:024ace6d943c 65 dayOfWeek += daysLeft;
andrewboyson 7:024ace6d943c 66 dayOfWeek %= 7;
andrewboyson 7:024ace6d943c 67
andrewboyson 7:024ace6d943c 68 //Add a month at a time while there is more than a month of days left
andrewboyson 7:024ace6d943c 69 int month = 0;
andrewboyson 7:024ace6d943c 70 while(1)
andrewboyson 7:024ace6d943c 71 {
andrewboyson 7:024ace6d943c 72 int daysInMonth;
andrewboyson 7:024ace6d943c 73 switch (month + 1)
andrewboyson 7:024ace6d943c 74 {
andrewboyson 7:024ace6d943c 75 case 1: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 76 case 2: daysInMonth = leapYear ? 29 : 28; break;
andrewboyson 7:024ace6d943c 77 case 3: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 78 case 4: daysInMonth = 30; break;
andrewboyson 7:024ace6d943c 79 case 5: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 80 case 6: daysInMonth = 30; break;
andrewboyson 7:024ace6d943c 81 case 7: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 82 case 8: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 83 case 9: daysInMonth = 30; break;
andrewboyson 7:024ace6d943c 84 case 10: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 85 case 11: daysInMonth = 30; break;
andrewboyson 7:024ace6d943c 86 case 12: daysInMonth = 31; break;
andrewboyson 7:024ace6d943c 87 }
andrewboyson 7:024ace6d943c 88
andrewboyson 7:024ace6d943c 89 //Stop if this is the last month
andrewboyson 7:024ace6d943c 90 if (daysLeft < daysInMonth) break;
andrewboyson 7:024ace6d943c 91
andrewboyson 7:024ace6d943c 92 //Move onto next month
andrewboyson 7:024ace6d943c 93 daysLeft -= daysInMonth;
andrewboyson 7:024ace6d943c 94 month++;
andrewboyson 7:024ace6d943c 95 }
andrewboyson 7:024ace6d943c 96
andrewboyson 7:024ace6d943c 97 ptm->tm_sec = seconds;
andrewboyson 7:024ace6d943c 98 ptm->tm_min = minutes;
andrewboyson 7:024ace6d943c 99 ptm->tm_hour = hours;
andrewboyson 7:024ace6d943c 100 ptm->tm_mday = daysLeft + 1;
andrewboyson 7:024ace6d943c 101 ptm->tm_mon = month;
andrewboyson 7:024ace6d943c 102 ptm->tm_year = year - 1900;
andrewboyson 7:024ace6d943c 103 ptm->tm_wday = dayOfWeek;
andrewboyson 7:024ace6d943c 104 ptm->tm_yday = dayOfYear;
andrewboyson 7:024ace6d943c 105 }
andrewboyson 7:024ace6d943c 106 void TimeGetTm(struct tm* ptm)
andrewboyson 7:024ace6d943c 107 {
andrewboyson 7:024ace6d943c 108 uint32_t time = TimeGet();
andrewboyson 7:024ace6d943c 109 TimeToTm(time, ptm);
andrewboyson 7:024ace6d943c 110 }
andrewboyson 6:be97d38e0b01 111 static Timer timer;
andrewboyson 6:be97d38e0b01 112 int TimeScanUs = 0;
andrewboyson 6:be97d38e0b01 113 int TimeMain()
andrewboyson 6:be97d38e0b01 114 {
andrewboyson 6:be97d38e0b01 115 int scanUs = timer.read_us();
andrewboyson 6:be97d38e0b01 116 timer.reset();
andrewboyson 6:be97d38e0b01 117 timer.start();
andrewboyson 6:be97d38e0b01 118 if (scanUs > TimeScanUs) TimeScanUs++;
andrewboyson 6:be97d38e0b01 119 if (scanUs < TimeScanUs) TimeScanUs--;
andrewboyson 6:be97d38e0b01 120 return 0;
andrewboyson 6:be97d38e0b01 121 }
andrewboyson 6:be97d38e0b01 122 int TimeInit()
andrewboyson 6:be97d38e0b01 123 {
andrewboyson 6:be97d38e0b01 124 ticker.attach_us(&tick, ONE_MILLION >> 4);
andrewboyson 6:be97d38e0b01 125 timer.stop();
andrewboyson 6:be97d38e0b01 126 timer.reset();
andrewboyson 6:be97d38e0b01 127 return 0;
andrewboyson 6:be97d38e0b01 128 }