enc28j60-struct.example.h

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// Copyright (c) 2020 Dalibor Drgon <dalibor.drgon@gmail.com>
// This code is licensed under MIT license (see LICENSE.txt for details)
#ifndef __ENC28J60_H
#error "Don't include this file directly, only via enc28j60.h"
#endif

#ifndef __ENC28J60_STRUCT_H
#define __ENC28J60_STRUCT_H

#include <stdint.h>

#define ENC28J60_ERROR_TOO_MANY_COLLISIONS -0x900

#define ENC28J60_ERROR_RX_TIMED_OUT -0x901

// TODO: Define or comment this
#define ENC28J60_HAS_ADVANCED_DRIVER

typedef uint16_t enc28j60_tick;

#define ENC28J60_TIMER_TICK_PER_SECOND 1000

#define ENC28J60_CALC_REMAINING_TICKS(GOAL, CUR) ((int16_t) (GOAL) - (int16_t) (CUR))

struct enc28j60 {
    enc28j60_spi_callback callback; 
    char *frame;
    unsigned length;
    uint16_t rxstatus;
    uint16_t retry_count;
    uint16_t retry_count_reg;

    uint16_t cur_rx_frame;
    uint16_t next_rx_frame;
    
    uint16_t current_pointer;

    uint16_t erxst;
    uint16_t erxnd;

    uint8_t bank;
    uint8_t current_action;

    // struct spi_device *device;
    // int file_handle;
    // SPI_t *spi;
    // bool (*error_callback)(enc28j60 *instance, int error_code);
    // etc... depending on your implementation
};

#ifdef ENC28J60_HAS_ADVANCED_DRIVER
int enc28j60_spi_advanced_transfer(
    enc28j60 *instance,
    const char* tx1, 
    char *rx1, 
    unsigned length1,
    const char* tx2, 
    char *rx2, 
    unsigned length2,
    enc28j60_spi_callback on_finish
);
#else
int enc28j60_spi_transfer(
    enc28j60 *instance,
    const char* tx, 
    char *rx, 
    unsigned length,
    enc28j60_spi_callback on_finish
);
#endif


int enc28j60_spi_transfer_join(
    enc28j60 *instance
);

bool enc28j60_spi_error_handler(
    enc28j60 *instance,
    int error_code,
    uint16_t retry
);

int enc28j60_delay(enc28j60 *ins, enc28j60_tick ticks);

int enc28j60_getticks(enc28j60 *ins, enc28j60_tick *ticks);



#endif