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Demo for the Clock library (real time clock driven by a Ticker).
Revision 0:81acb52fed21, committed 2015-04-30
- Comitter:
- hudakz
- Date:
- Thu Apr 30 10:31:45 2015 +0000
- Child:
- 1:0e2956eaae94
- Commit message:
- Initial release.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Clock.lib Thu Apr 30 10:31:45 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/hudakz/code/Clock/#af43d5d263e7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Apr 30 10:31:45 2015 +0000 @@ -0,0 +1,104 @@ +/** + * Demonstrates how to use the Clock library + * + * Note: It's a soft Real Time Clock. No external hardware is needed. + * + */ + +#include "mbed.h" +#include "Clock.h" + +Serial serial(USBTX, USBRX); + + +Clock rtc; // Create Clock instance (set to 00:00:00 January 1, 1970) + +// Create some alarm times +time_t alarm1 = Clock::asTime(2015, 3, 24, 11, 36, 15); // year, month, day of month, hour, minute, second +time_t alarm2 = Clock::asTime(2015, 3, 24, 11, 37, 30); // year, month, day of month, hour, minute, second + +// Create flags to support performing time consuming tasks in main() (in case you have such tasks) +bool minute_tick_flag = false; + +/** + * @brief Clock tick event handler (called once a second) + * @note Make sure that it takes less than 1 second to execute + * this function. Otherwise the rtc will fall behind! + * One technique is to set some flags here and + * then test them in the while loop of main(). + * See minute_tick_flag. + * @param + * @retval + */ +void onRtcTick(void) { + serial.printf("==================================================\r\n"); +// time_t time = time(NULL); // you can call C time function if you like + time_t time = rtc.time(); // or rtc equivalent + serial.printf("Time as seconds since January 1, 1970 = %d\r\n", time); + serial.printf("Time as a basic string = %s\r\n", ctime(&time)); + + // You can use also custom format. + char buffer[32]; + strftime(buffer, 32, "%I:%M %p", localtime(&time)); + serial.printf("Time as a custom formatted string = %s\r\n", buffer); + // Or design your own: + serial.printf("Date: %.4d-%.2d-%.2d\r\n", rtc.year(), rtc.mon(), rtc.mday()); + serial.printf("Time: %.2d:%.2d:%.2d\r\n", rtc.hour(), rtc.min(), rtc.sec()); + + // But if it takes too much time (more than 1s) to execute this Interrupt Service Routine + // then the RTC will fall behind! + // That's why we shall keep this routine as short as possible. + // For time consuming tasks we better set flags here and after testing them in the main() + // perform the task there. For an example have a look at the minute_tick_flag. + + // + // Execute periodical tasks + // + if(rtc.sec() % 10 == 0) { + serial.printf("\r\n Called each 10 seconds\r\n\r\n"); + } + + if(rtc.sec() == 0) { + serial.printf("\r\n Called each minute.\r\n\r\n"); + + if(rtc.min() % 5 == 0) + serial.printf("\r\n Called each 5 minutes\r\n"); + + if(rtc.min() == 0) + serial.printf("\r\n Called each hour\r\n"); + + if(rtc.hour() == 0) + serial.printf("\r\n Called at midnight\r\n"); + + minute_tick_flag = true; // set the flag here (to be tested and reset in main()) + } + + // + // Trigger alarms + // + if(rtc.time() == alarm1) { + serial.printf("\r\n Alarm1 triggered!\r\n\r\n"); + } + + if(rtc.time() == alarm2) { + serial.printf("\r\n Alarm2 triggered!\r\n\r\n"); + } +} + +int main() { + rtc.attach(onRtcTick); // attach a handler function to the rtc tick event + + // + // Set time. For instance 2015, March, 24th, 11 hours, 35 minutes, 45 seconds + // + rtc.set(2015, 3, 24, 11, 35, 45); // year, month (1 stands for Jan etc.), day of month, hour, minute, second + + while (true) { + if(minute_tick_flag == true) { + minute_tick_flag = false; // clear the flag for next use + // Perform time consuming tasks at defined times! + serial.printf("Performing some time consuming tasks in the main() ...\r\n\r\n"); + // ... + } + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Apr 30 10:31:45 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/8ab26030e058 \ No newline at end of file