#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 */