www.pudn.com > 2minilib.rar > spi.h

/***************************************************************************\ 
	Copyright (c) 2004-2007 threewater@up-tech.com, All rights reserved. 
	by threewter	2005.2.26 
\***************************************************************************/ 
/***************************************************************************\ 
    #说明: spi接口驱动程序 
	----------------------------------  Bug  -------------------------------------- 
 
	----------------------------------  TODO list  -------------------------------------- 
 
	----------------------------------修正-------------------------------------- 
 
	2005-2-26	创建 
 
\***************************************************************************/ 
#ifndef __ASM_ARCH_SPI_H__ 
#define __ASM_ARCH_SPI_H__ 
 
#define fSPCON_SMOD	Fld(2,5)	/* SPI Mode Select */ 
#define SPCON_SMOD	FMsk(fSPCON_SMOD) 
#define SPCON_SMOD_POLL	FInsrt(0x0, fSPCON_SMOD)	/* polling mode */ 
#define SPCON_SMOD_INT	FInsrt(0x1, fSPCON_SMOD)	/* interrupt mode */ 
#define SPCON_SMOD_DMA	FInsrt(0x2, fSPCON_SMOD)	/* DMA mode */ 
#define SPCON_ENSCK	(1 << 4)	/* Enable SCK */ 
#define SPCON_MSTR	(1 << 3)	/* Master/Slave select 
					   0: slave, 1: master */ 
#define SPCON_CPOL	(1 << 2)	/* Clock polarity select 
					   1: active low, 0: active high */ 
#define SPCON_CPOL_LOW	(1 << 2) 
#define SPCON_CPOL_HIGH	(0 << 2) 
#define SPCON_CPHA	(1 << 1)	/* Clock Phase Select 
					   0: format A, 1: format B */ 
#define SPCON_CPHA_FMTA	(0 << 1) 
#define SPCON_CPHA_FMTB	(1 << 1) 
#define SPCON_TAGD	(1 << 0)	/* Tx auto garbage data mode enable 
			in normal mode, you only want to receive data, 
					you should tranmit dummy 0xFF data */ 
 
#define SPSTA_DCOL	(1 << 2)	/* Data Collision Error */ 
#define SPSTA_MULF	(1 << 1)	/* Multi Master Error */ 
#define SPSTA_READY	(1 << 0)	/* data Tx/Rx ready */ 
 
#define SPPIN_ENMUL	(1 << 2)	/* Multi Master Error detect Enable */ 
#define SPPIN_KEEP	(1 << 0)	/* Master Out keep */ 
 
 
void SPISend ( unsigned char val, int channel ); 
unsigned char SPIRecv ( int channel ); 
void Set_SIO_mode(int channel, int nSPCON, int nSPPRE, int SPPIN, 
		int *poldnSPCON, int *poldnSPPRE, int *poldSPPIN); 
 
void SPI_initIO(int channel); 
 
__inline static unsigned char SendReadData(unsigned char data, int ch) 
{ 
	SPISend(data, ch); 
	return SPIRecv(ch); 
} 
 
 
#endif