/**--------------File Info-------------------------------------------------------------------------------
** File name:			sdhal.h
** Last modified Date:	2005-1-6
** Last Version:		V1.0
** Descriptions:		sd 卡驅動軟件包: 硬件抽象層 ---- SPI操作函數頭文件
**						Soft Packet of SD Card Driver: hard abstrast layer ---- function of SPI operation 
**																			    header file
**------------------------------------------------------------------------------------------------------
** Created by:			gan peng
** Created date:		2005-1-6
** Version:				V1.0
** Descriptions:		The original version
**
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** Descriptions:		
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/* 檢測卡是否完全插入  check weather card is insert entirely */
extern INT8U SD_ChkCard(void);


extern INT8U SD_ChkCardWP(void);


/* 初始化訪問SD卡的硬件初始化 initialize the hardware that access sd card */
extern void SD_HardWareInit(void);

/* 設置SPI的時鐘小于400kHZ set the clock of SPI less than 400kHZ */
extern void SPI_Clk400k(void);

/* 設置SPI的clock到最大值 set the clock of SPI to maximum */
extern void SPI_ClkToMax(void);

/* 通過SPI接口發送一個字節 send a byte by SPI interface */
extern void SPI_SendByte(INT8U byte);

/* 從SPI接口接收一個字節 receive a byte from SPI interface */
extern INT8U SPI_RecByte(void);

/* 片選SPI從機 select the SPI slave */
extern void SPI_CS_Assert(void);

/* 不片選SPI從機 not select the SPI slave */
extern void SPI_CS_Deassert(void);