iic.h

基于S3C4510的家庭网关的通讯进程程序源码

/***********************************************************
文件名：iic.h i2c函数库头文件
功能：i2c数据结构的定义和函数的定义
版本：version 1.0
完成日期：2004.7.18
***********************************************************/
#ifndef _IIC_H_
#define _IIC_H_

#define SYS_BASE 		0x03ff0000
#define SRAM_BASE		0x03fe0000
#define IO_BASE 			0x03600000
#define IOPMOD                 *((volatile unsigned*)(SYS_BASE+0x5000))
#define IOPCON                  *((volatile unsigned*)(SYS_BASE+0x5004))
#define IOPDATA                 *((volatile unsigned*)(SYS_BASE+0x5008))
/********************/
/* I2C Bus Register */
/********************/
#define IICCON                 *((volatile unsigned*)(SYS_BASE+0xf000))
#define IICBUF                  *((volatile unsigned*)(SYS_BASE+0xf004))
#define IICPS                    *((volatile unsigned*)(SYS_BASE+0xf008))
#define IICCOUNT 		*((volatile unsigned*)(SYS_Baser+0xf00c))

#define BF 				0x01        //Buffer flag
#define IEN				0x02        //Interrupt enable
#define LRB				0x04        //Last bit received
                                    			//ACK not received
#define ACK				0x08        //Acknowlege enable
                                    		//Generate an ACK signal at 9th SCL
#define NOACK			0x00        //No more received data is required
                                    			//from the slave
#define START			0x10
#define STOP				0x20
#define RESTART			0x30
#define BUSY				0x40
#define IICRESET			0x80        //Reset the IIC-BUS controller

#define IIC_DEV_0		0xa0    //IIC device's slave address
#define S_WRITE			0x00    //Write IIC data for slave
#define S_READ			0x01    //Read IIC data for slave
/* Byte Slave transmitter and receive status flags */
#define  iic_slave_addr       0x01  /* slave addr flag */
#define  iic_byte_addr_msb 0x02  /* byte msb addr */
#define  iic_byte_addr_lsb  0x04  /* byte lsb addr */
#define  iic_page_tx_done  0x08  /* Page data transmit done */
#define  iic_byte_rx_done   0x10  /* byte data receive done */
#define  iic_repeat_start     0x20  /* flag for repeat start */
#define  iic_multi_recv       	 0x40  /* recv multiple data */
#define  iic_no_more_recv  0x80  /* no more recv from slave */

#define S8            		signed char
#define S16           		signed short
#define S32           		signed long
#define U8            		unsigned char
#define U16           		unsigned short
#define U32           		unsigned long
#define REG8          		volatile unsigned char
#define REG16         		volatile unsigned short
#define REG32         		volatile unsigned long
#define BYTE          		U8

#define MHz      			1000000
#define fMCLK                 	50*MHz       
#define MCLK2                 	(fMCLK/2)
#define fSCL         		400000     /* IIC Serial clock frequency */
#define SizeOfPage		64
#define StorageSize    	((64*1024)/8)
/* Data structure for multiple byte slave transmitter format */
#define Write_Cycle_ms(x)     (x*0.001*fMCLK-1) 
typedef struct 
{
  volatile    U32  FLAG;
  volatile    U32  BuffByteCnt;             /* Page buffer byte counter */ 
  volatile    U32  WriteDataSize;           /* Page buffer byte counter */ 
  volatile    U8   SLAVE_ADDR;              /* Slave address */
  volatile    U8   BYTE_ADDR_MSB;           /* Byte MSB address */
  volatile    U8   BYTE_ADDR_LSB;           /* Byte LSB address */
  volatile    U8   PAGE_BUFFER[SizeOfPage+1]; /* IIC Page data buffer */

} IIC_DATA_TX_FORMAT;

typedef struct 
{
  volatile    U32  FLAG;
  volatile    U32  ByteReadCnt;             
  volatile    U32  ReadDataSize;             
  volatile    U8   SLAVE_ADDR;
  volatile    U8   BYTE_ADDR_MSB;
  volatile    U8   BYTE_ADDR_LSB;
  volatile    U8   *RCV_BUFFER;

} IIC_DATA_RX_FORMAT;
/*=====================================================================*/
/*                       IIC SETUP ROUTINES (iic.c)                    */
/*=====================================================================*/
extern int  SetPreScaler(int sclk);
extern void IicSetup(void);
extern void IICReadTest(void);
/*=====================================================================*/
/*             IIC LIBRARY FUNCTIONS FOR IIC READ & WRITE              */
/*=====================================================================*/
extern void IICWriteInt(U8 SlaveAddr,U16 WriteAddr,U8 *data,U32 SizeOfData);
extern void *IICReadInt(U8 SlaveAddr,U16 ReadAddr,U32 SizeOfData);
#endif   /* end of the IIC header file */