Clock library
[Contiki system]

The clock library is the interface between Contiki and the platform specific clock functionality. More...

Defines
#define	CLOCK_SECOND
	A second, measured in system clock time.
Functions
void	clock_init (void)
	Initialize the clock library.
CCIF clock_time_t	clock_time (void)
	Get the current clock time.
void	clock_delay (unsigned int)
	Delay the CPU for a multiple of TODO.

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Detailed Description

The clock library is the interface between Contiki and the platform specific clock functionality.

The clock library performs a single function: measuring time. Additionally, the clock library provides a macro, CLOCK_SECOND, which corresponds to one second of system time.

Note:

The clock library need in many cases not be used directly. Rather, the timer library or the event timers should be used.

See also:

Timer library

Event timers

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Function Documentation

void clock_init

(

void

)

Initialize the clock library.

This function initializes the clock library and should be called from the main() function of the system.

set Timer/Counter0 to be asynchronous from the CPU clock with a second external clock(32,768kHz) driving it.

Wait for TCN0UB, OCR0UB, and TCR0UB.

Definition at line 37 of file clock.c.

References CLOCK_SECOND, INTERRUPTS_OFF, INTERRUPTS_ON, and TICK_VAL.

Referenced by main().

CCIF clock_time_t clock_time

(

void

)

Get the current clock time.

This function returns the current system clock time.

Returns:

The current clock time, measured in system ticks.

Examples:

example-rucb.c, and example-rudolph2.c.

Definition at line 42 of file clock.c.

Referenced by clock_wait().