can.h

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#ifndef INCLUDE_CAN_H_
#define INCLUDE_CAN_H_
 
#include <avr/io.h>
#include <stdbool.h>
#include <stdint.h>
 
#include "spi.h"
 
#define CAN_ID_ERROR 0x01
#define CAN_ID_GAMEOVER 0x02
#define CAN_ID_GAMESTART 0x03
#define CAN_ID_JOYPOS 0x04
#define CAN_ID_RESET 0x05
#define CAN_ID_READY 0x06
#define CAN_ID_SCORE 0x07
#define CAN_ID_DEFAULT 0x08
 
#define CAN_RXQ_SIZE 8

struct can_msg {
  uint8_t adress; 
  uint8_t num_df; 
  uint8_t data;   
};

struct can_device {
  enum spi_slave spi; 
};

struct CAN_frame {
  uint32_t id;      
  uint8_t dlc;      
  char data[8];     
  uint8_t extended; 
  uint8_t rtr; 
};
 
//------------------//
//   GENERAL CAN    //
//------------------//

int8_t can_init(struct can_device *dev);

int8_t can_write(struct can_device *dev, struct CAN_frame msg);

int8_t can_read_rx0(struct can_device *dev, struct CAN_frame *out);

int8_t can_read_rx1(struct can_device *dev, struct CAN_frame *out);

int can_rxq_add(struct CAN_frame *msg);

int can_rxq_pull(struct CAN_frame *out);
 
int8_t can_reset(struct can_device *dev, uint8_t address,
                 struct CAN_frame data_frame);
 
//------------------//
//   MSCP2515    //
//------------------//
 
int8_t MCP2515_init(struct can_device *dev);
int8_t MCP2515_read(struct can_device *dev, uint8_t rx_buf_num, uint8_t *out);
int8_t MCP2515_write(struct can_device *dev, uint8_t addr, uint8_t data);
int8_t MCP2515_request_to_send(struct can_device *dev, uint8_t tx_buf_num);
int8_t MCP2515_bit_modify(struct can_device *dev, uint8_t reg, uint8_t mask,
                          uint8_t set_val);
int8_t MCP2515_reset(struct can_device *dev);
int8_t MCP2515_read_status(struct can_device *dev, uint8_t *out);
 
#endif // INCLUDE_CAN_H_