/*
*  DESCRIPTION for iomacros.h
*      Read/Write macros for memory mapped I/O
*/

#ifndef _IOMACROS_H
#define _IOMACROS_H
#include "type.h"
/****************************************************************************
                        Constants Definitions
****************************************************************************/
#define IO_READ8(p)      (Uint8)(*(volatile Uint8 *)(p))
#define IO_WRITE8(p,c)   (*((volatile Uint8 *)(p)) = ((Uint8)(c)))

#define IO_READ16(p)     (Uint16)(*(volatile Uint16 *)(p))
#define IO_WRITE16(p,v)  (*((volatile Uint16 *)(p)) = (Uint16)(v))

#define IO_READ32(p)     (Uint32)(*(volatile Uint32 *)(p))
#define IO_WRITE32(p,v)  (*((volatile Uint32 *)(p)) = (Uint32)(v))

//#define R32(p)     (Uint32)(*(volatile Uint32 *)(p))
//#define WR32(p,v)  (*((volatile Uint32 *)(p)) = (Uint32)(v))

#define W8(p,c)   (*((volatile Uint8 *)(p)) = ((Uint8)(c)))
#define W16(p,v)  (*((volatile Uint16 *)(p)) = (Uint16)(v))
#define W32(p,v)  (*((volatile Uint32 *)(p)) = (Uint32)(v))

#define R8(p,data)  (Uint8)(data = *(volatile Uint8 *)(p))
#define R16(p,data)  (Uint16)(data = *(volatile Uint16 *)(p))
#define R32(p,data)  (Uint32)(data = *(volatile Uint32 *)(p))
#endif

貌似是某芯片的IO口的读/写地址指针的宏定义。。。有高手能解读一下吗？