sdhal.h

SD卡的SPI驱动程序

/****************************************Copyright (c)**************************************************
**                               Guangzhou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			sdhal.h
** Last modified Date:	2005-1-6
** Last Version:		V1.0
** Descriptions:		Soft Packet of SD Card Driver: hard abstrast layer ---- Physical layer for SD card
**
**------------------------------------------------------------------------------------------------------
** Created by:			Ming Yuan Zheng
** Created date:		2005-1-6
** Version:				V1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:			Jing.Zhang
** Modified date:		2005-12-19
** Version:				
** Descriptions:		
**
**------------------------------------------------------------------------------------------------------
** Modified by: 
** Modified date:
** Version:	
** Descriptions: 
**
********************************************************************************************************/
#ifndef  __SD_HAL_H__
#define  __SD_HAL_H__
#include "alt_types.h"
#include "zlg_avalon_spi.h"
/* check whether the SD card is inserted entirely */
extern INT8U SD_ChkCard(void);

/* check whether the SD card is in the Write-protection status */
extern INT8U SD_ChkCardWP(void);

/* initialize the hardware that related to SD card */
extern void SD_HardWareInit(void);

/* send a byte by SPI interface */
extern void SPI_SendByte(INT8U byte);

/* receive a byte from SPI interface */
extern INT8U SPI_RecByte(void);

/* select the SPI slave */
static ALT_INLINE void ALT_ALWAYS_INLINE SPI_CS_Assert(void)
{
   SPI_SS_ASSERT();
}

/* not select the SPI slave */
static ALT_INLINE void ALT_ALWAYS_INLINE SPI_CS_Deassert(void)
{
  SPI_SS_DEASSERT();
}

#endif /*  __SD_HAL_H__ */