Nut/OS System Timer implemented on the GBA. More...

Collaboration diagram for GBA System Timer:

Defines
#define	NUT_CPU_FREQ 1000000UL
#define	NUT_TICK_FREQ 1000UL
Functions
void	Timer3Entry (void *arg)
	Timer 0 interrupt entry.
void	NutRegisterTimer (void(handler)(void ))
	Initialize system timer.
uint32_t	NutArchClockGet (int idx)
	Return the CPU clock in Hertz.
uint32_t	NutGetTickClock (void)
	Return the number of system ticks per second.
uint32_t	NutTimerMillisToTicks (uint32_t ms)
	Calculate system ticks for a given number of milliseconds.

Detailed Description

Nut/OS System Timer implemented on the GBA.

Define Documentation

#define NUT_CPU_FREQ 1000000UL

Definition at line 92 of file ostimer_gba.c.

Referenced by NutArchClockGet().

#define NUT_TICK_FREQ 1000UL

Definition at line 96 of file ostimer_gba.c.

Referenced by NutGetTickClock(), and NutTimerMillisToTicks().

Function Documentation

void Timer3Entry ( void * arg )

Timer 0 interrupt entry.

Definition at line 104 of file ostimer_gba.c.

References INT_TMR3, outw, and REG_IF.

Referenced by NutRegisterTimer().

void NutRegisterTimer ( void(*)(void *) handler )

Initialize system timer.

This function is automatically called by Nut/OS during system initialization.

Nut/OS uses on-chip timer 0 for its timer services. Applications should not modify any registers of this timer, but make use of the Nut/OS timer API. Timer 1 and timer 2 are available to applications.

Definition at line 121 of file ostimer_gba.c.

References INT_TMR3, inw, NutRegisterIrqHandler(), outdw, outw, REG_IE, REG_IME, REG_TMR3CNT, sig_TMR3, Timer3Entry(), TMR_ENA, and TMR_IRQ_ENA.