fio.c

NXP LPC系列AMR7的开发程序源码（LCD

/*****************************************************************************
 *   fio.c:  Fast I/O module file for NXP LPC23xx Family Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.07.13  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#include "LPC230x.h"				/* LPC23xx definitions */
#include "type.h"
#include "irq.h"
#include "timer.h"
#include "fio.h"

/*****************************************************************************
** Function name:		GPIOInit
**
** Descriptions:		initialize GPIO port
**
** parameters:			port number and port type, Fast I/O or 
** 						regular GPIO, direction
** Returned value:		None
** 
*****************************************************************************/
void GPIOInit( DWORD PortNum, DWORD PortType, DWORD PortDir )
{
    if ( (PortType == REGULAR_PORT) && ((PortNum == 0) || (PortNum == 1)) )
	{
		SCS &= ~GPIOM;		/* set GPIOx to use regular I/O */
		if ( PortDir == DIR_OUT )
		{
			(*(volatile unsigned long *)(REGULAR_PORT_DIR_BASE 
					+ PortNum * REGULAR_PORT_DIR_INDEX)) = 0xFFFFFFFF;
		}
		else
		{
			(*(volatile unsigned long *)(REGULAR_PORT_DIR_BASE 
					+ PortNum * REGULAR_PORT_DIR_INDEX)) = 0x00000000;
		}
	}
	else if ( PortType == FAST_PORT )
	{
		if ( (PortNum == 0) || (PortNum == 1) )
		{
			SCS |= GPIOM;	/* set GPIOx to use Fast I/O */
		}
		if ( PortDir == DIR_OUT )
		{
			(*(volatile unsigned long *)(HS_PORT_DIR_BASE 
					+ PortNum * HS_PORT_DIR_INDEX)) = 0xFFFFFFFF;
		}
		else
		{
			(*(volatile unsigned long *)(HS_PORT_DIR_BASE 
					+ PortNum * HS_PORT_DIR_INDEX)) = 0x00000000;
    	}
	}
    return;
}

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