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Detailed Description

Function Documentation

Attach an external RTC to be used for the C time functions.

Note: Synchronization level: Thread safe

read_rtcpointer to function which returns current UNIX timestamp write_rtcpointer to function which sets current UNIX timestamp, can be NULL init_rtcpointer to function which initializes RTC, can be NULL isenabled_rtcpointer to function which returns if the RTC is enabled, can be NULL

Parameters

tvStructure containing time_t seconds and useconds_t microseconds. Due to separate target specific RTC implementations only the seconds component is used. tzDEPRECATED IN THE STANDARD: This parameter is left in for legacy code. It is not used.

Returns: 0 on success, -1 on a failure.

Note: Synchronization level: Thread safe

Implementation of the C time.h functions.

Provides mechanisms to set and read the current time, based on the microcontroller Real-Time Clock (RTC), plus some standard C manipulation and formatting functions.

Example:

       
         #include "mbed.h"
        
         int main() {
        
         set_time(1256729737);  // Set RTC time to Wed, 28 Oct 2009 11:35:37
        
         while (true) {
        
         time_t seconds = time(NULL);
        
         printf("Time as seconds since January 1, 1970 = %u\n", (unsigned int)seconds);
        
         printf("Time as a basic string = %s", ctime(&seconds));
        
         char buffer[32];
        
         strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
        
         printf("Time as a custom formatted string = %s", buffer);
        
         ThisThread::sleep_for(1000);
        
         }
        
         }

Set the current time

Initializes and sets the time of the microcontroller Real-Time Clock (RTC) to the time represented by the number of seconds since January 1, 1970 (the UNIX timestamp).

Parameters

tNumber of seconds since January 1, 1970 (the UNIX timestamp)

Note: Synchronization level: Thread safe

Example:

         
           #include "mbed.h"
          
           int main() {
          
           set_time(1256729737); // Set time to Wed, 28 Oct 2009 11:35:37
          
           }

Parameters

Returns: Time in seconds on success, -1 on a failure.

Note: Synchronization level: Thread safe

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