// port defines
#define PORTA   'A'
#define PORTB   'B'
#define PORTG   'G'

//direction defines
#define DIRIN   'I'
#define DIROUT  'O'

// pin defines for PORTG
#define PG0     (1<<0)
#define PG1     (1<<1)
#define PG2     (1<<2)
#define PG3     (1<<3)
#define PG4     (1<<4)
#define PG5     (1<<5)
#define PG6     (1<<6)
#define PG7     (1<<7)
#define PG8     (1<<8)
#define PG9     (1<<9)
#define PG10    (1<<10)
#define PG11    (1<<11)
#define PG12    (1<<12)
#define PG13    (1<<13)
#define PG14    (1<<14)
#define PG15    (1<<15)
#define PG16    (1<<16)
#define PG17    (1<<17)
#define PG18    (1<<18)
#define PG19    (1<<19)
#define PG20    (1<<20)
#define PG21    (1<<21)
#define PG22    (1<<22)
#define PG23    (1<<23)
#define PG24    (1<<24)

#define PG8_15  0x00ff00
#define PG16_23 0xff0000


// pin defines for PORTA
#define PA0     (1<<0)
#define PA1     (1<<1)
#define PA2     (1<<2)
#define PA3     (1<<3)
#define PA4     (1<<4)
#define PA5     (1<<5)
#define PA6     (1<<6)
#define PA7     (1<<7)

// pin defines for PORTB
#define PB0     (1<<0)
#define PB1     (1<<1)
#define PB2     (1<<2)
#define PB3     (1<<3)
#define PB4     (1<<4)
#define PB5     (1<<5)
#define PB6     (1<<6)
#define PB7     (1<<7)

void gpiosetbits(unsigned char port, unsigned int bits);
void gpioclearbits(unsigned char port, unsigned int bits);
void gpiosetdir(unsigned char port, unsigned char dir, unsigned int bits);
void gpiotogglebit(unsigned char port, unsigned int bits);
unsigned int gpiogetbits(unsigned char port, unsigned int bits);