Data Structures | |
struct | timeval |
Functions | |
void | set_time (time_t t) |
Implementation of the C time.h functions. More... | |
void | attach_rtc (time_t(*read_rtc)(void), void(*write_rtc)(time_t), void(*init_rtc)(void), int(*isenabled_rtc)(void)) |
Attach an external RTC to be used for the C time functions. More... | |
int | gettimeofday (struct timeval *tv, void *tz) |
Standard lib retarget, get time since Epoch. More... | |
int | settimeofday (const struct timeval *tv, const struct timezone *tz) |
Standard lib retarget, set time since Epoch. More... | |
void attach_rtc | ( | time_t(*)(void) | read_rtc, |
void(*)(time_t) | write_rtc, | ||
void(*)(void) | init_rtc, | ||
int(*)(void) | isenabled_rtc | ||
) |
Attach an external RTC to be used for the C time functions.
read_rtc | pointer to function which returns current UNIX timestamp |
write_rtc | pointer to function which sets current UNIX timestamp, can be NULL |
init_rtc | pointer to function which initializes RTC, can be NULL |
isenabled_rtc | pointer to function which returns if the RTC is enabled, can be NULL |
int gettimeofday | ( | struct timeval * | tv, |
void * | tz | ||
) |
Standard lib retarget, get time since Epoch.
tv | Structure containing time_t seconds and useconds_t microseconds. Due to separate target specific RTC implementations only the seconds component is used. |
tz | DEPRECATED IN THE STANDARD: This parameter is left in for legacy code. It is not used. |
void set_time | ( | time_t | t | ) |
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:
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).
t | Number of seconds since January 1, 1970 (the UNIX timestamp) |
Example:
int settimeofday | ( | const struct timeval * | tv, |
const struct timezone * | tz | ||
) |
Standard lib retarget, set time since Epoch.
tv | Structure containing time_t seconds and useconds_t microseconds. Due to separate target specific RTC implementations only the seconds component is used. |
tz | DEPRECATED IN THE STANDARD: This parameter is left in for legacy code. It is not used. |