iic.h

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#define IIC_READ 0XA1    //定义读指令
#define IIC_WRITE 0XA0   //定义写指令
#define NOP _nop_()
#define uchar unsigned char
#define uint  unsigned int
#include "reg52.h"
#define IIC_READ 0XA1    //定义读指令
#define IIC_WRITE 0XA0   //定义写指令
#define NOP _nop_()
extern uchar readbyteseq(uint add,uchar *ptr,uint readlen);
extern uchar writebyteseq(uint add,uchar *ptr,uint writelen);
extern void delay10ms(void);
//#define SDA INT0
//#define SCL T0
//==============================
uchar xdata buff[2000]; //save the byte read out  form iic device in test operation
uchar xdata readbuff[232];//测试数组，暂存写入读出数据
//uchar writebuff[32];
//===============================
sbit SDA=P3^5;//P2^7; //THE SDA BIT IS PORT 2 BIT 7
sbit SCL=P3^4;//P2^6; //THE SCL BIT IS PORT 2 BIT 6
sbit SEN=P3^3;//P2^6; //THE SCL BIT IS PORT 2 BIT 6
sbit STE=P3^2;//P2^6; //THE SCL BIT IS PORT 2 BIT 6



uchar bdata bbyte;//定义位操作用数组，采用此方法可提高位操作速度
sbit a0=bbyte^0;
sbit a1=bbyte^1;
sbit a2=bbyte^2;
sbit a3=bbyte^3;
sbit a4=bbyte^4;
sbit a5=bbyte^5;
sbit a6=bbyte^6;
sbit a7=bbyte^7;
//========================================
bit IFACK; //record the SDA state to confirn if ACK has happened 
bit NO_ACK; //no ack flag
bit BUS_FAULT; //bus fault flag
//========================================