File can_driver.c¶

/*******************************************************************************
 * ISO-TP-C: ISO 15765-2 Protocol Implementation
 *
 * Project:     ISO-TP-C - Embedded-Grade Refactoring & Optimization
 * Description: The CAN driver interface definition for the ISO-TP implementation. This header
 *              defines the structure and functions required to interact with a CAN driver. It
 *              allows for abstraction of the CAN communication layer, enabling the use of different
 *              CAN drivers without modifying the ISO-TP implementation. The mock CAN driver
 *              provided in this project implements this interface for testing purposes.
 *
 * Author:      Anton Vynohradov
 * Email:       avynohradov@systemfromscratch.com
 *
 * License:     MIT License
 *
 * Copyright (c) 2026 Anton Vynohradov
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * SPDX-License-Identifier: MIT
 ******************************************************************************/

/* ==============================================================================
 * INCLUDES
 * =============================================================================*/

#include "can_driver.h"

/* ==============================================================================
 * DEFINES & MACROS
 * =============================================================================*/

/* Internal macros and constants */

/* ==============================================================================
 * PRIVATE TYPE DEFINITIONS
 * =============================================================================*/

/* Static type definitions local to this file */

/* ==============================================================================
 * PRIVATE VARIABLES (static)
 * =============================================================================*/

// clang-format off
static const can_driver_t* active_driver = 0;  
// clang-format on

/* ==============================================================================
 * PRIVATE FUNCTION DECLARATIONS (static)
 * =============================================================================*/


/* ==============================================================================
 * PRIVATE FUNCTION IMPLEMENTATIONS
 * =============================================================================*/


/* ==============================================================================
 * PUBLIC FUNCTION IMPLEMENTATIONS
 * =============================================================================*/

void can_set_driver(const can_driver_t* driver)
{
    active_driver = driver;
}

int can_send(uint32_t id, const uint8_t* data, uint8_t len)
{
    if (!active_driver || !active_driver->send)
    {
        return -1;
    }
    return active_driver->send(id, data, len);
}

int can_receive(uint32_t* id, uint8_t* data, uint8_t* len)
{
    if (!active_driver || !active_driver->receive)
    {
        return -1;
    }
    return active_driver->receive(id, data, len);
}