gp4020_io.c

此程序为GPS接收机的源码

// gp4020_io.c hardware I/O for GP4020
// Copyright (C) 2005  Andrew Greenberg
// Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2 (June 1991).
// See the "COPYING" file distributed with this software for more information.
#include <cyg/kernel/kapi.h>
#include "gp4020_io.h"

//==========================================================================
// 32 bit access functions
//==========================================================================

inline void
out32 (cyg_uint32 address, cyg_uint32 data)
{
    *((volatile cyg_uint32 *)address) = data;
}

inline cyg_uint32
in32 (cyg_uint32 address)
{
    return( *((volatile cyg_uint32 *)address));
}

inline void
setbits32 (cyg_uint32 address, cyg_uint32 data)
{
    *((volatile cyg_uint32 *)address) |= data;
}

inline void
clearbits32 (cyg_uint32 address, cyg_uint32 data)
{
    *((volatile cyg_uint32 *)address) &= ~data;
}

//==========================================================================
// 16 bit access functions
//==========================================================================

inline void
out16 (cyg_uint32 address, cyg_uint16 data)
{
     *((volatile cyg_uint16 *)address) = data;
}

inline cyg_uint16
in16 (cyg_uint32 address)
{
    return( *((volatile cyg_uint16 *)address));
}

inline void
setbits16 (cyg_uint32 address, cyg_uint16 data)
{
    *((volatile cyg_uint16 *)address) |= data;
}

inline void
clearbits16 (cyg_uint32 address, cyg_uint16 data)
{
    *((volatile cyg_uint16 *)address) &= ~data;
}