pwrman.c

NXP产品LPC23XX的开发板的源文件

/*****************************************************************************
 *   pwrman.c:  Power Management module file for NXP LPC23xx/24xx Family Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.07.20  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#include "LPC230x.h"                        /* LPC23xx/24xx definitions */
#include "type.h"
#include "irq.h"
#include "target.h"
#include "pwrman.h"

#include <intrinsics.h>

volatile DWORD eint0_counter;
/*****************************************************************************
** Function name:		EINT0_Handler
**
** Descriptions:		external INT handler
**
** parameters:			None
** Returned value:		None
** 
*****************************************************************************/
__irq __nested __arm void EINT0_Handler (void)
{
    EXTINT = EINT0;		/* clear interrupt */

    __enable_interrupt();	/* handles nested interrupt */

    eint0_counter++;

    VICVectAddr = 0;		/* Acknowledge Interrupt */
}

/*****************************************************************************
** Function name:		EINTInit
**
** Descriptions:		Initialize external interrupt pin and
**				install interrupt handler
**
** parameters:			None
** Returned value:		true or false, return false if the interrupt
**				handler can't be installed to the VIC table.
** 
*****************************************************************************/
DWORD EINTInit( void )
{
    PINSEL4 = 0x00100000;	/* set P2.10 as EINT0 and
							P2.0~7 GPIO output */
	FIO2DIR = 0x000000FF;	/* port 2, bit 0~7 only */
    FIO2CLR = 0x000000FF;	/* turn off LEDs */

	IO2_INT_EN_F = 0x200;	/* Port2.10 is falling edge. */
    EXTMODE = EINT0_EDGE;	/* INT0 edge trigger */
    EXTPOLAR = 0;			/* INT0 is falling edge by default */
     
    if ( install_irq( EINT0_INT, (void *)EINT0_Handler, HIGHEST_PRIORITY ) == FALSE )
    {
		return (FALSE);
    }
        
    return( TRUE );
}

/******************************************************************************
** Function name:		PM_Init
**
** Descriptions:		Set up wakeup source before powering down
**						Use EXTINT0 as wakeup source		
**
** parameters:			
** Returned value:		true or fase, if VIC table is full, return false
** 
******************************************************************************/
DWORD PM_Init( void )
{
	if ( EINTInit() != TRUE )	/* Enable external interrupt 0 */
	{
		return ( FALSE );
	}
	INTWAKE |= 0x01;			/* Set EXTINT0 as wakeup source */
	return ( TRUE );    
}

/******************************************************************************
**                            End Of File
******************************************************************************/