i2c.h

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/*
Cubesat Space Protocol - A small network-layer protocol designed for Cubesats
Copyright (C) 2012 GomSpace ApS (http://www.gomspace.com)
Copyright (C) 2012 AAUSAT3 Project (http://aausat3.space.aau.dk)

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef I2C_H_
#define I2C_H_

#define E_NO_ERR -1

#define I2C_MTU     256

#define I2C_MASTER  0
#define I2C_SLAVE   1

typedef struct __attribute__((packed)) i2c_frame_s {
    uint8_t padding;
    uint8_t retries;
    uint32_t reserved;
    uint8_t dest;
    uint8_t len_rx;
    uint16_t len;
    uint8_t data[I2C_MTU];
} i2c_frame_t;

typedef void (*i2c_callback_t) (i2c_frame_t * frame, void * pxTaskWoken);


int i2c_init(int handle, int mode, uint8_t addr, uint16_t speed, int queue_len_tx, int queue_len_rx, i2c_callback_t callback);

int i2c_send(int handle, i2c_frame_t * frame, uint16_t timeout);

#endif /* I2C_H_ */

/* @} */