#include <nitro/os.h>void OS_InitTick( void );
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This function allocates a timer for ticks and initializes it.
Ticks are a method of using a hardware timer to generate a u64 increment count. A tick is also the obtained value. Although the timer itself is 16 bits, in addition to the 16-bit cycle, which is one unit, there is also an internal counter. As a result it creates a 64-bit tick value. (The frequency of the system clock is OS_SYSTEM_CLOCK Hz, so ticks run at OS_SYSTEM_CLOCK / 64 Hz.)
The OS_InitTick function internally sets the tick value to 0. Therefore it is possible to assume that the value obtained with the OS_GetTick function is the time since OS_InitTick().
A timer that is allocated for ticks becomes system-reserved. A user cannot use it as a timer with the OS_StartTimer function or similar functions. Do not call the OS_InitTick function if the user wants to use all of the timers.
Ticks are necessary when you use the alarm system. Call OS_InitTick() before calling the alarm system initialization declaration function OS_InitAlarm.
OS_GetTick, OS_GetTickLo, OS_SetTick, OS_InitAlarm
2004/02/25 Changed systemClock to tick.
2004/02/04 Initial version.
CONFIDENTIAL