sdhal.h

周立功公司为LPC213X ARM7 编写的SD卡读写模块

/****************************************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:		sd 卡驱动软件包: 硬件抽象层 ---- SPI操作函数头文件
**						Soft Packet of SD Card Driver: hard abstrast layer ---- function of SPI operation 
**																			    header file
**------------------------------------------------------------------------------------------------------
** Created by:			Ming Yuan Zheng
** Created date:		2005-1-6
** Version:				V1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:			
** Modified date:		
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** Descriptions:		
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**------------------------------------------------------------------------------------------------------
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********************************************************************************************************/

/* 检测卡是否完全插入  check weather card is insert entirely */
extern INT8U SD_ChkCard(void);


extern INT8U SD_ChkCardWP(void);


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

/* 设置SPI的时钟小于400kHZ set the clock of SPI less than 400kHZ */
extern void SPI_Clk400k(void);

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

/* 通过SPI接口发送一个字节 send a byte by SPI interface */
extern void SPI_SendByte(INT8U byte);

/* 从SPI接口接收一个字节 receive a byte from SPI interface */
extern INT8U SPI_RecByte(void);

/* 片选SPI从机 select the SPI slave */
extern void SPI_CS_Assert(void);

/* 不片选SPI从机 not select the SPI slave */
extern void SPI_CS_Deassert(void);