spi.h

此程序为DP256的SPI实验程序,已经通过实验证明

#ifndef __SPI_H__
#define __SPI_H__

#ifdef SPI_GLOBALS
	#define SPI_EXT
#else
	#define SPI_EXT	extern
#endif

#define SPI_TX_REQ		1
#define SPI_RX_REQ		2
//#define SPI_TX_TX		4
#define SPI_RX_FULL		8
#define SPI_XMT_IDLE	0
#define SPI_ERR_OV		16
#define SPI_ERR_MODF	32
#define SPI_ERR_NORESPONSE	64
#define SPI_FLAG_INT	4
#define SPI_FLAG_THEM	128



#define SPI_MAX_DATA_LEN	3

#define SPI_CLK_DIV2		0
#define SPI_CLK_DIV8		1
#define SPI_CLK_DIV32		2
#define SPI_CLK_DIV128		3
#define SPI_CLK_DIVIDOR		SPI_CLK_DIV32

#define SPI_MODE_SLAVE		0
#define SPI_MODE_MASTER		1

#define SPI_SPRF		0x80
#define SPI_OVRF		0x20
#define SPI_MODF			0x10

#define SPI_ENABLE			1
#define SPI_DISABLE			0


#define	SPI_XMT_TIMEOUT		4
#define	SPI_ERR_TIMEOUT		4	//wait for 1s when spi communication error ocurred
#define SPI_TIMER_UNUSED	0xaa55

typedef struct
{
//	void	*mTXData;
//	void	*mRXData;
	unsigned char	mDataLength;
	unsigned char	mState;
	unsigned char	mRxCounter;
	unsigned char	mTxCounter;
	unsigned int	mTimer;
}SPIStr;

SPI_EXT SPIStr	SPIBuf;

SPI_EXT unsigned char	SPI_Tx_Buf[SPI_MAX_DATA_LEN];
SPI_EXT unsigned char	SPI_Rx_Buf[SPI_MAX_DATA_LEN];

SPI_EXT	unsigned char	SPI_State;

/************************************
*Function Name: SPI_SetMode
*Parameter: 	nMode, 0 - Slave Mode; 1 - Master Mode
*Orignator: 	Wang junpeng
*Date:			1st, June, 2005
*Discription:	Config SPI Mode as nMode 
*
**************************************/

void SPI_SetMode(unsigned char	nMode);


/************************************
*Function Name: SPI_Init
*Parameter: 	None
*Orignator: 	Wang junpeng
*Date:			2nd, June, 2005
*Discription:	Initialize SPI 
*
**************************************/

void SPI_Init(void);


/************************************
*Function Name: SPI_Enable
*Parameter: 	En, 0 - Disable; 1 - Enable
*Orignator: 	Wang junpeng
*Date:			2nd, June, 2005
*Discription:	Enable SPI Function
*
**************************************/

L_BOOL SPI_Enable(L_U8 En, L_U8 bInt);


/************************************
*Function Name: SPI_Start
*Parameter: 	nDataLength
*Orignator: 	Wang junpeng
*Date:			2nd, June, 2005
*Discription:	Start SPI Transmission
*
**************************************/

void SPI_Start(unsigned char nDataLength);


/************************************
*Function Name: SPI_RxIndicator
*Parameter: 	None
*Orignator: 	Wang junpeng
*Date:			2nd, June, 2005
*Discription:	All SPI Data received Indication
*
**************************************/

void SPI_RxIndicator(void);	

#if SPI_DEBUG_MODE	== 1
	void	SPI_Debug(void);
#endif

#endif