pcf8574.h

MSP430的I2C模块

#ifndef _PCF8574_H
#define _PCF8574_H

#define PCF8574  0x40
#define PCF8574A 0x70
#define A2A1A0_0 0x00
#define A2A1A0_1 0x02
#define A2A1A0_2 0x04
#define A2A1A0_3 0x06
#define A2A1A0_4 0x08
#define A2A1A0_5 0x0A
#define A2A1A0_6 0x0C
#define A2A1A0_7 0x0E

#define I2CWR_ADDR  (PCF8574A | A2A1A0_1)>>1
#define I2CRD_ADDR  (PCF8574A | A2A1A0_1 | 0x01)>>1

#endif