pucspi.h

这是单板上DPRAM的驱动程序

/*Programed by zhoudb 2002-6-21*/
#ifndef __GENERAL_PORT_SPI_H
#define __GENERAL_PORT_SPI_H
/*物料层的相关定义*/
#define BitMask     0x80
#define SS_EN   	0
#define SS_DIS  	1
#define HALFPERIOD  1   /*用于调整SCK的半周期*/

#define SCK(val)  	SET_PB_BIT(30,val)
#define MOSI(val) 	SET_PB_BIT(29,val) 
#define MISO      	GET_PB_BIT(28)
#define SS1(val)    SET_PB_BIT(31,val)
#define SS2(val)    SET_PB_BIT(27,val)
/*数据链路层的相关定义*/
#define YYES        1
#define NNO         0
#define COMMANDWRITE  0x61
#define COMMANDREAD   0x60
#define IDMASK        0xf1

#define SOFTWARETIMEOUT 	1000		
#define MAXTIMEOUTNUM		6
#define RESETTIME		3
/*BCM5328的SPI相关寄存器地址*/
#define SPI_DATA0       	0xf0
#define SPI_DATA1       	0xf1
#define SPI_DATA2       	0xf2
#define SPI_DATA3       	0xf3
#define SPI_DATA4       	0xf4
#define SPI_DATA5       	0xf5
#define SPI_DATA6       	0xf6
#define SPI_DATA7       	0xf7
#define SPI_STS				0xfe
#define SPI_PAGE			0xff
/*BCM5328的SPI状态寄存器的比特屏蔽字节*/
#define MASK_STS_SPIF		0x80
#define MASK_STS_RACK		0x20
#define MASK_STS_TXRDY		0x02
#define MASK_STS_RXRDY		0x01

typedef struct
{
unsigned char RegPageAddr;
unsigned char RegAddr;
unsigned char DataLength;
unsigned char DataBuf[8]; /*DataBuf[]是次高位的BYTE,DataBuf[0]是最高位的BYTE*/
unsigned char BcmID;	
}BcmRegStruct;
 
typedef enum
{
	BCM_OK=0,			/*操作成功*/
	BCM_INVALID_ID=1,   /*无效的ID号*/
	BCM_TIME_OUT=2,     /*软件超时*/
	BCM_INVLAID_DATA_LENGTH=3,/*无效的数据长度，为了简化协议，这儿的最大长度为8*/	
}BCM_STATUS;

/*供应用层软件调用的的接口函数*/
void Bcm5328SpiInit(void);
void Bcm5328CLK(void);
BCM_STATUS Bcm5328RegWrite(BcmRegStruct *RegStruct);
BCM_STATUS Bcm5328RegRead(BcmRegStruct *RegStruct);
#endif