// PCF8574 driver header


#define PCFP0 0x01
#define PCFP1 0x02
#define PCFP2 0x04
#define PCFP3 0x08
#define PCFP4 0x10
#define PCFP5 0x20
#define PCFP6 0x40
#define PCFP7 0x80   //128

void pcf_init();

void pcf_setbits(uint8_t ports);
void pcf_resetbits(uint8_t ports);