main.cpp

00001 /**
00002  * Demo for the Clock library <https://developer.mbed.org/users/hudakz/code/Clock/>
00003  *
00004  * Note: Software implemented Real Time Clock driven by a Ticker.
00005  *       No external hardware (like DS1307 or DS3231 or etc.) is needed.
00006  *
00007  */
00008 
00009 #include "mbed.h"
00010 #include "Clock.h"
00011 
00012 Serial pc(USBTX, USBRX);
00013 
00014 
00015 Clock rtc;    // Create an instance of Clock class (set to 00:00:00 January 1, 1970)
00016 
00017 // Create alarms as needed
00018 time_t  alarm1 = Clock::asTime(2015, 3, 24, 11, 36, 15);  // year, month (1 stands for Jan etc.), day of month, hour, minute, second
00019 time_t  alarm2 = Clock::asTime(2015, 3, 24, 11, 37, 30);
00020 
00021 volatile bool   ticked = false;  // tick flag
00022 
00023 /**
00024  * @brief   Clock tick ISR - event handler (called once a second)
00025  * @note    Keep it as short as possible.
00026  * @param
00027  * @retval
00028  */
00029 void onClockTick(void) {
00030     ticked = true;
00031 }
00032 
00033 /**
00034  * @brief   Main
00035  * @note
00036  * @param
00037  * @retval
00038  */
00039 int main() {
00040     time_t      rawtime;
00041     struct tm*  p_tm;
00042     
00043     rtc.attach(onClockTick);  // attach a handler function to the rtc's tick event
00044 
00045     //
00046     // Set rtc for instance to 2015, March, 24th, 11 hours, 35 minutes, 45 seconds
00047     //
00048     rtc.set(2015, 3, 24, 11, 35, 45);
00049     //rawtime = time(NULL);        // if you like to call C library time function 
00050     rawtime = rtc.time();        // if you like to call Clock function
00051                     
00052     p_tm = gmtime(&rawtime);
00053     printf("Current time around the World:\r\n");
00054     printf("Phoenix, AZ (U.S.) : %d:%d\r\n", (p_tm->tm_hour -7) % 24, p_tm->tm_min);
00055     printf("Reykjavik (Iceland) : %d:%d\r\n", (p_tm->tm_hour + 0) % 24, p_tm->tm_min);
00056     printf("Beijing (China) : %d:%d\r\n", (p_tm->tm_hour + 8) % 24, p_tm->tm_min);
00057 
00058 
00059 
00060     while (true) {
00061         if(ticked == true) {
00062             ticked = false;  // clear the flag for next use in ISR
00063 
00064             // You draw clock hands on a graphical display
00065             // or update/refresh digital display or etc.
00066             // ...
00067             // In this demo we just display some info on the PC's serial terminal ..
00068             //
00069             pc.printf("==================================================\r\n");
00070             //rawtime = time(NULL);        // if you like you can call C library time function 
00071             rawtime = rtc.time();        // or Clock's function
00072             pc.printf("Time as seconds since January 1, 1970 = %d\r\n", rawtime);
00073             pc.printf("Time as a basic string = %s", ctime(&rawtime));
00074             
00075             //
00076             // Use custom format:
00077             //
00078             char buffer[32];
00079             strftime(buffer, 32, "%I:%M %p", localtime(&rawtime));
00080             pc.printf("Time as a custom formatted string = %s\r\n", buffer);
00081 
00082             //
00083             // Create your own format:
00084             //
00085             pc.printf("Date:  %.4d-%.2d-%.2d\r\n", rtc.year(), rtc.mon(), rtc.mday());
00086             pc.printf("Time:  %.2d:%.2d:%.2d\r\n", rtc.hour(), rtc.min(), rtc.sec());
00087             
00088             pc.printf("------------------------------------\r\n");
00089 
00090             //
00091             // Perform periodical tasks:
00092             //
00093             if(rtc.sec() % 10 == 0) {
00094                 pc.printf("Called once a 10 seconds\r\n");
00095             }
00096 
00097             if(rtc.sec() == 0) {
00098                 pc.printf("Called once a minute.\r\n");
00099 
00100                 if(rtc.min() % 5 == 0)
00101                     pc.printf("Called once a 5 minutes\r\n");
00102 
00103                 if(rtc.min() == 0) {
00104                     pc.printf("Called once an hour\r\n");
00105 
00106                     if(rtc.hour() % 3 == 0)
00107                         pc.printf("Called once a 3 hours\r\n");
00108 
00109                     if(rtc.hour() == 0) {
00110                         pc.printf("Called at midnight\r\n");
00111 
00112                         if(rtc.wday() == 3)
00113                             pc.printf("Called on Wednesday at midnight\r\n");
00114                     }
00115                 }
00116             }
00117 
00118             //
00119             // Trigger the alarms:
00120             //
00121             if(rtc.time() == alarm1) {
00122                 pc.printf("Alarm1 triggered!\r\n");
00123             }
00124 
00125             if(rtc.time() == alarm2) {
00126                 pc.printf("Alarm2 triggered!\r\n");
00127             }
00128             
00129             pc.printf("------------------------------------\r\n");
00130         }
00131     }
00132 }