io.h

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#ifndef INCLUDE_INCLUDE_IO_H_
#define INCLUDE_INCLUDE_IO_H_
 
#include "fonts.h"
#include "spi.h"
#include <stdint.h>

struct oled_font {
  const void *table;       
  uint8_t bytes_per_glyph; 
  uint8_t height;          
  uint8_t spacing;         
};

static const struct oled_font OLED_FONT_8x8 = {font8, 8, 8, 1};
static const struct oled_font OLED_FONT_5x7 = {font5, 5, 7, 1};
static const struct oled_font OLED_FONT_4x6 = {font4, 4, 6, 1};

struct io_avr_device {
  enum spi_slave spi; 
};

struct io_oled_device {
  enum spi_slave spi;     
  uint8_t current_page;   
  uint8_t current_column; 
};

struct io_joystick_device {
  unsigned int adc_channel_x; 
  unsigned int adc_channel_y; 
 
  // Calibration
  int x_min; 
  int y_min; 
  int x_max; 
  int y_max; 
};

struct io_joystick_position {
  int8_t x; 
  int8_t y; 
};

enum io_joystick_direction {
  LEFT,   
  RIGHT,  
  UP,     
  DOWN,   
  NEUTRAL 
};

struct __attribute__((packed)) io_avr_buttons {
  union {
    uint8_t right; 
    struct {
      uint8_t R1 : 1;
      uint8_t R2 : 1;
      uint8_t R3 : 1;
      uint8_t R4 : 1;
      uint8_t R5 : 1;
      uint8_t R6 : 1;
    };
  };
  union {
    uint8_t left; 
    struct {
      uint8_t L1 : 1;
      uint8_t L2 : 1;
      uint8_t L3 : 1;
      uint8_t L4 : 1;
      uint8_t L5 : 1;
      uint8_t L6 : 1;
      uint8_t L7 : 1;
    };
  };
  union {
    uint8_t nav; 
    struct {
      uint8_t NB : 1; 
      uint8_t NR : 1; 
      uint8_t ND : 1; 
      uint8_t NL : 1; 
      uint8_t NU : 1; 
    };
  };
};
 
//------------------//
//     Joystick     //
//------------------//

int io_joystick_init(struct io_joystick_device *dev);

int io_joystick_read_position(struct io_joystick_device *dev,
                              struct io_joystick_position *buffer);

int io_joystick_read_direction(struct io_joystick_device *dev,
                               enum io_joystick_direction *direction);

int io_joystick_calibrate(struct io_joystick_device *dev);
 
//-------------------//
//   Button Inputs   //
//-------------------//
 
int io_avr_init(struct io_avr_device *dev);
int io_avr_buttons_read(struct io_avr_device *dev, struct io_avr_buttons *btn);
int io_avr_led_set(struct io_avr_device *dev, unsigned char led,
                   unsigned char brightness);
 
//------------------//
//       OLED       //
//------------------//

int io_oled_init(struct io_oled_device *dev);

// int io_oled_cmd(struct io_oled_device *dev, uint8_t command);

// int io_oled_write(struct io_oled_device *dev, uint8_t data);

int io_oled_reset(struct io_oled_device *dev);

int io_oled_home(struct io_oled_device *dev);

int io_oled_goto_line(struct io_oled_device *dev, int line);

int io_oled_goto_column(struct io_oled_device *dev, int column);

int io_oled_clear_line(struct io_oled_device *dev, int line);

volatile int io_oled_writedata(struct io_oled_device *dev, int data);

int io_oled_pos(struct io_oled_device *dev, int row, int column);

int io_oled_print(struct io_oled_device *dev, char *text);

int io_oled_set_brightness(struct io_oled_device *dev, uint8_t brightness);

int io_oled_reset_brightness(struct io_oled_device *dev);

int io_oled_print_arrow(struct io_oled_device *dev, uint8_t row, uint8_t col);

uint8_t io_oled_write_glyph(struct io_oled_device *dev,
                            const struct oled_font *font, char character_id);

int io_oled_print_with_font(struct io_oled_device *dev,
                            const struct oled_font *font, char *text);

int io_oled_test(struct io_oled_device *dev);

int io_oled_blink(struct io_oled_device *dev, uint8_t blinks);
 
int io_oled_write_data(struct io_oled_device *dev, uint8_t data);
int io_oled_write_command(struct io_oled_device *dev, uint8_t command);
 
// NEW FOR TESTING
int io_oled_clear_all(struct io_oled_device *dev);
 
#endif // INCLUDE_INCLUDE_IO_H_