clock.c File Reference

Use the last periodic interval timer (PIT3) as the system clock. More...

#include <rtems.h>
#include <bsp.h>
#include <mcf5282/mcf5282.h>
#include "../../../shared/dev/clock/clockimpl.h"

Macros
#define	CLOCK_VECTOR   (64+58)
#define	Clock_driver_support_at_tick(arg)
#define	Clock_driver_support_install_isr(_new)
#define	Clock_driver_support_initialize_hardware()
#define	CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER

Detailed Description

Use the last periodic interval timer (PIT3) as the system clock.

Macro Definition Documentation

Clock_driver_support_at_tick

#define Clock_driver_support_at_tick

(

arg

)

Value:

    do {                                           \
        MCF5282_PIT3_PCSR |= MCF5282_PIT_PCSR_PIF; \
    } while (0)                                    \

Clock_driver_support_initialize_hardware

#define Clock_driver_support_initialize_hardware

(

void

)

Value:

    do {                                                                 \
        int level;                                                       \
        int preScaleCode = 5;                                             \
        MCF5282_INTC0_ICR58 = MCF5282_INTC_ICR_IL(PIT3_IRQ_LEVEL) |      \
                              MCF5282_INTC_ICR_IP(PIT3_IRQ_PRIORITY);    \
        rtems_interrupt_disable( level );                                \
        MCF5282_INTC0_IMRH &= ~MCF5282_INTC_IMRH_INT58;                  \
        MCF5282_PIT3_PCSR &= ~MCF5282_PIT_PCSR_EN;                       \
        rtems_interrupt_enable( level );                                 \
        MCF5282_PIT3_PMR = 0x23FE;  \
        MCF5282_PIT3_PCSR = MCF5282_PIT_PCSR_PRE(preScaleCode) |         \
                            MCF5282_PIT_PCSR_PIE |                       \
                            MCF5282_PIT_PCSR_RLD |                       \
                            MCF5282_PIT_PCSR_EN;                         \
    } while (0)

Clock_driver_support_install_isr

#define Clock_driver_support_install_isr

(

_new

)

Value:

    rtems_interrupt_handler_install( \
        CLOCK_VECTOR, \
        "Install clock interrupt", \
        RTEMS_INTERRUPT_UNIQUE, \
        (void *)_new, \
        NULL \
    );