clockdrv.c File Reference

#include <rtems.h>
#include <bsp/irq.h>
#include <bsp.h>
#include <stdio.h>
#include <stdlib.h>
#include "yamon_api.h"
#include "../../../shared/dev/clock/clockimpl.h"

Macros
#define	CLOCK_VECTOR   TX4938_IRQ_TMR0
#define	TX4938_TIMER_INTERVAL_MODE   1
#define	TX4938_TIMER_MODE   TX4938_TIMER_INTERVAL_MODE
#define	TX4938_TIMER_INTERRUPT_FLAG   TIIS
#define	Clock_driver_support_initialize_hardware()    Initialize_timer0_in_interval_mode()
#define	Clock_driver_support_install_isr(_new)
#define	Clock_driver_support_at_tick(arg)
#define	Initialize_timer0_in_interval_mode()
#define	CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER

Functions
void	new_brk_esr (void)

Variables
t_yamon_retfunc	esr_retfunc = 0
t_yamon_ref	original_brk_esr = 0
t_yamon_ref	original_tmr0_isr = 0

Detailed Description

Instantiate the clock driver shell.

Macro Definition Documentation

Clock_driver_support_at_tick

#define Clock_driver_support_at_tick

(

arg

)

Value:

  do { \
    uint32_t interrupt_flag; \
    do { \
        int loop_count; \
        TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_TISR, 0x0 ); /* Clear timer 0 interrupt */ \
            loop_count = 0; \
            do { /* Wait until interrupt flag is cleared (this prevents re-entering interrupt) */ \
                /* Read back interrupt status register and isolate interval timer flag */ \
                interrupt_flag = TX4938_REG_READ( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_TISR ) & TX4938_TIMER_INTERRUPT_FLAG; \
            } while (interrupt_flag && (++loop_count < 10)); /* Loop while timer interrupt bit is set, or loop count is lees than 10 */ \
    } while(interrupt_flag); \
  } while(0)

Clock_driver_support_install_isr

#define Clock_driver_support_install_isr

(

_new

)

Value:

  do { \
    rtems_interrupt_handler_install( \
      CLOCK_VECTOR, \
      "clock", \
      0, \
      _new, \
      NULL \
    ); \
    YAMON_FUNC_REGISTER_IC_ISR(17,(t_yamon_isr)_new,0,&original_tmr0_isr); /* Call Yamon to enable interrupt */ \
  } while(0)

Initialize_timer0_in_interval_mode

#define Initialize_timer0_in_interval_mode

(

)

Value:

  do { \
    uint32_t temp; \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_TCR, 0x0 ); /* Disable timer */ \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_CCDR, 0x0 ); /* Set register for divide by 2 clock */ \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_ITMR, TIMER_CLEAR_ENABLE_MASK ); /* Set interval timer mode register */ \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_CPRA, 0x3d090 ); /* Set tmier period ,10.0 msec (25 MHz timer clock) */ \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_TCR, 0xC0 ); /* Enable timer in interval mode */ \
    temp = TX4938_REG_READ( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_ITMR ); /* Enable interval timer interrupts */ \
    temp |= TIMER_INT_ENABLE_MASK; \
    TX4938_REG_WRITE( TX4938_REG_BASE, TX4938_TIMER0_BASE + TX4938_TIMER_ITMR, temp ); \
  } while(0)