pcf8574.h

/*
pcf8574 lib 0x01

copyright (c) Davide Gironi, 2012

Released under GPLv3.
Please refer to LICENSE file for licensing information.
*/


#ifndef PCF8574_H_
#define PCF8574_H_

#define PCF8574_ADDRBASE (0x20) //device base address

#define PCF8574_MAXDEVICES 8 //max devices, depends on address (3 bit)
#define PCF8574_MAXPINS 8 //max pin per device

//settings
#define PCF8574_I2CFLEURYPATH "i2cmaster.h" //define the path to i2c fleury lib

//pin status
volatile uint8_t pcf8574_pinstatus[PCF8574_MAXDEVICES];


//functions
void pcf8574_init(void);
extern int8_t pcf8574_getoutput(uint8_t deviceid);
extern int8_t pcf8574_getoutputpin(uint8_t deviceid, uint8_t pin);
extern int8_t pcf8574_setoutput(uint8_t deviceid, uint8_t data);
extern int8_t pcf8574_setoutputpins(uint8_t deviceid, uint8_t pinstart, uint8_t pinlength, int8_t data);
extern int8_t pcf8574_setoutputpin(uint8_t deviceid, uint8_t pin, uint8_t data);
extern int8_t pcf8574_setoutputpinhigh(uint8_t deviceid, uint8_t pin);
extern int8_t pcf8574_setoutputpinlow(uint8_t deviceid, uint8_t pin);
extern int8_t pcf8574_getinput(uint8_t deviceid);
extern int8_t pcf8574_getinputpin(uint8_t deviceid, uint8_t pin);
#endif