msp430i2c.h

这是一个在MSP430单片机上

#ifndef __MSP430I2C_H__
#define __MSP430I2C_H__

//定义IIC端口
#define IIC_DIR		P3DIR
#define IIC_OUT		P3OUT
#define IIC_IN		P3IN
#define IIC_SCL		BIT4					//SCL定义
#define IIC_SDA		BIT5					//SDA定义
//定义SDA和SCL德工作方式
#define S_SDA		IIC_OUT |= IIC_SDA		//sda置位
#define S_SCL		IIC_OUT |= IIC_SCL
#define C_SDA		IIC_OUT &= ~IIC_SDA
#define C_SCL		IIC_OUT &= ~IIC_SCL		//scl复位

#define SDA_IN		IIC_DIR &= ~IIC_SDA		//设置SDA为输入
#define SDA_OUT		IIC_DIR |= IIC_SDA

#define READ_SDA	( IIC_IN & IIC_SDA)		//读SDA电平

extern void InitIIC();
extern unsigned char I2CReadStr(unsigned char DeviceAddr, unsigned char DataAddr, unsigned char *data,unsigned char len);
extern unsigned char I2CWriteStr(unsigned char DeviceAddr, unsigned char DataAddr, unsigned char *data,unsigned char len);

#endif