i2c.h

用于MSP430169驱动12864的液晶显示器

#ifndef  __I2C_H
#define  __I2C_H
unsigned char I2CWrMem(unsigned char,unsigned char,unsigned char *);
unsigned I2CRdMem(unsigned char,unsigned char,unsigned char *);
unsigned I2CWrByte(unsigned char,unsigned char);
unsigned I2CRdByte(unsigned char, unsigned char *);
void I2CDelay(unsigned char);
unsigned char AddrSetting(unsigned char,unsigned char,unsigned char);

#define FAILURE 1
#define SUCCESS 0
//SDA p3.1 SDA
//SCK P3.3 SCK
#define I2C_EN   P3SEL &=0xF5
#define SCK_HIGH P3OUT |=0x08
#define SCK_LOW  P3OUT &=0xF7
#define SDA_HIGH P3OUT |=0x02
#define SDA_LOW  P3OUT &=0xFD 
#define CHK_SCK  P3IN & 0x08
#define CHK_SDA  P3IN & 0x02
#define I2C_OUT  P3DIR |=0x0A
#define I2C_IN   P3DIR &=0xFD
//P1.6 I2C Interrupt
#define CHK_I2C  P1IN & 0x02
#define I2CDLY 10
#endif