Time¶
OSTimeTick¶
void OSTimeTick(void);
- Called by the hardware timer tick. Use by uCOS to increment its internal timer.
- The timer interrupt should occur 10 to 100 times per second.
- This function should be called by the timer IRQ through a function pointer set in the VIC.
OSTimeDly¶
void OSTimeDly(INT16U ticks);
- Provides a timed delay.
- Ticks is a value between 0 to 65,536 (16 bits)
- A delay of 0 means no delay but it does remove the task from the ready list and calls the scheduler, forcing a context switch.
- The delay resolution is one tick. What that means is that a delay of N will actually be anywhere from N-1 to N. Possibly one less than asked for.
OSTimeDlyHMSM¶
INT8U OSTimeDlyHMSM(INT8U hours, INT8U minutes, INT8U seconds, INT16U milli);
- Alternative interface for the time delay.
- Enables setting the delay in hours, minutes, seconds, and milliseconds.
- Depends on a correctly set OS_TICKS_PER_SEC in os_cfg.h.
- Can delay up to 256 hours or 11 days.
- Forces a context switch.
OSTimeDlyResume¶
INT8U OSTimeDlyResume(INT8U prio);
- Cancels the delay of the task at the specified priority.
- Also cancels waiting for an event with a timeout delay. Though it will appear to the task that the timeout had expired.
OSTimeSet¶
void OSTimeSet(INT32U ticks);
- Sets the uCOS time count.
- Timer count is a 32 bit value.
- Rolls over at 4,294,967,295 ticks or 4GB ticks.