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/LPC24xx Family Microprocessors
 *
 *   Copyright(C) 2006, NXP Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.07.13  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#include <nxp/iolpc2468.h>
#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, Mask
** Returned value:    None
**
*****************************************************************************/
void GPIOInit( DWORD PortNum, DWORD PortType, DWORD PortDir, DWORD Mask)
{
  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)) |= Mask;
    }
    else
    {
      (*(volatile unsigned long *)(REGULAR_PORT_DIR_BASE
          + PortNum * REGULAR_PORT_DIR_INDEX)) &= ~Mask;
    }
  }
  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)) |= Mask;
    }
    else
    {
      (*(volatile unsigned long *)(HS_PORT_DIR_BASE
          + PortNum * HS_PORT_DIR_INDEX)) &= ~Mask;
      }
  }
    return;
}

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