#ifndef GPIO_H
#define GPIO_H

#ifdef        __cplusplus
extern "C" {
#endif

#include "erlcommon.h"

typedef union
{
  unsigned int _val;
  struct
  {
    unsigned int PIN0      :1;
    unsigned int PIN1      :1;
    unsigned int PIN2      :1;
    unsigned int PIN3      :1;
    unsigned int PIN4      :1;
    unsigned int PIN5      :1;
    unsigned int PIN6      :1;
    unsigned int PIN7      :1;
    unsigned int PIN8      :1;
    unsigned int PIN9      :1;
    unsigned int PIN10     :1;
    unsigned int PIN11     :1;
    unsigned int PIN12     :1;
    unsigned int PIN13     :1;
    unsigned int PIN14     :1;
    unsigned int PIN15     :1;
    unsigned int PIN16     :1;
    unsigned int PIN17     :1;
    unsigned int PIN18     :1;
    unsigned int PIN19     :1;
    unsigned int PIN20     :1;
    unsigned int PIN21     :1;
    unsigned int PIN22     :1;
    unsigned int PIN23     :1;
    unsigned int PIN24     :1;
    unsigned int PIN25     :1;
    unsigned int PIN26     :1;
    unsigned int PIN27     :1;
    unsigned int PIN28     :1;
    unsigned int PIN29     :1;
    unsigned int PIN30     :1;
    unsigned int PIN31     :1;
  };
} GPIO_REG;

typedef struct
{
  GPIO_REG port_dr;
  GPIO_REG port_ddr;
  GPIO_REG port_ctl;

} gpio_port;

gpio_port* get_gpio_dev(char port);

enum ERL_ERROR gpio_pin_config(char port, int pin, int val, int dir, int ctl);

enum ERL_ERROR gpio_pin_set(char port, int pin, int val);

enum ERL_ERROR gpio_pin_invert(char port, int pin);

#define GPIO_BASE 0x38034000

/* TODO: Example address shown, but the proper address */
#define GPIO_PORTA_DR (*(volatile GPIO_REG *) (GPIO_BASE + 0x24))
#define GPIO_PORTA_DDR (*(volatile GPIO_REG *) (GPIO_BASE + 0x28))
#define GPIO_PORTA_CTL (*(volatile GPIO_REG *) (GPIO_BASE + 0x2C))

#define GPIO_PORTB_DR (*(volatile GPIO_REG *) (GPIO_BASE + 0x24))
#define GPIO_PORTB_DDR (*(volatile GPIO_REG *) (GPIO_BASE + 0x28))
#define GPIO_PORTB_CTL (*(volatile GPIO_REG *) (GPIO_BASE + 0x2C))

#define GPIO_PORTC_DR (*(volatile GPIO_REG *) (GPIO_BASE + 0x24))
#define GPIO_PORTC_DDR (*(volatile GPIO_REG *) (GPIO_BASE + 0x28))
#define GPIO_PORTC_CTL (*(volatile GPIO_REG *) (GPIO_BASE + 0x2C))

#define GPIO_PORTD_DR (*(volatile GPIO_REG *) (GPIO_BASE + 0x24))
#define GPIO_PORTD_DDR (*(volatile GPIO_REG *) (GPIO_BASE + 0x28))
#define GPIO_PORTD_CTL (*(volatile GPIO_REG *) (GPIO_BASE + 0x2C))




#ifdef	__cplusplus
}
#endif

#endif	/* GPIO_H */