source: EP9302-digital/digital.h

/*
 *  EP9302 Digital library
 *  Copyright (C) 2010  Andrea Milazzo aka Mancausoft
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define DATA_PAGE               0x80840000
#define SYSCON_PAGE     0x80930000

#define SYSCON_UNLOCK     0x00C0
#define UNLOCK_VAL        0xAA
#define DEVICECFG         0x80

//Registers
#define PADR  0x0
#define PBDR  0x04
#define PCDR  0x08
#define PDDR  0x0C
#define PADDR 0x10
#define PBDDR 0x14
#define PCDDR 0x18
#define PDDDR 0x1C
#define PEDR  0x20
#define PEDDR 0x24
#define PFDR  0x30
#define PFDDR 0x34
#define PGDR  0x38
#define PGDDR 0x3C
#define PHDR  0x40
#define PHDDR 0x44


#define MAX_PORT_USED 5
#define MAX_CONN 4
#define MAX_PIN 7

int init_ports();
void close_ports(int devmem);

int set_port_bit (uint8_t nport, bool value, uint8_t pos);
int get_port_bit (uint8_t nport, bool* value, uint8_t pos);
int set_port_dir_bit (uint8_t nport, bool value, uint8_t pos);
int get_port_dir_bit (uint8_t nport, bool* value, uint8_t pos);
int set_port_dir(uint8_t nport, uint8_t value);
int get_port_dir(uint8_t nport, uint8_t* value);
int set_port (uint8_t nport, uint8_t value);
int get_port (uint8_t nport, uint8_t* value);

inline void set_bit(bool src, volatile uint8_t *dst, uint8_t bit);
inline void get_bit(volatile uint8_t src, bool *dst, uint8_t bit);