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mcp2515.h
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mcp2515.h
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#ifndef MCP2515_H
#define MCP2515_H
// ----------------------------------------------------------------------------
/* Copyright (c) 2007 Fabian Greif
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
// ----------------------------------------------------------------------------
#include <inttypes.h>
#include "mcp2515_defs.h"
#include "global.h"
#ifdef __cplusplus
extern "C"
{
#endif
// ----------------------------------------------------------------------------
typedef struct
{
uint16_t id;
struct {
int8_t rtr : 1;
uint8_t length : 4;
} header;
uint8_t data[8];
} tCAN;
// ----------------------------------------------------------------------------
uint8_t spi_putc( uint8_t data );
// ----------------------------------------------------------------------------
void mcp2515_write_register( uint8_t adress, uint8_t data );
// ----------------------------------------------------------------------------
uint8_t mcp2515_read_register(uint8_t adress);
// ----------------------------------------------------------------------------
void mcp2515_bit_modify(uint8_t adress, uint8_t mask, uint8_t data);
// ----------------------------------------------------------------------------
uint8_t mcp2515_read_status(uint8_t type);
// ----------------------------------------------------------------------------
uint8_t mcp2515_init(uint8_t speed);
// ----------------------------------------------------------------------------
// check if there are any new messages waiting
uint8_t mcp2515_check_message(void);
// ----------------------------------------------------------------------------
// check if there is a free buffer to send messages
uint8_t mcp2515_check_free_buffer(void);
// ----------------------------------------------------------------------------
uint8_t mcp2515_get_message(tCAN *message);
// ----------------------------------------------------------------------------
uint8_t mcp2515_send_message(tCAN *message);
#ifdef __cplusplus
}
#endif
#endif // MCP2515_H