rc5.h

/* vim:fdm=marker ts=4 et ai
 * {{{
 *         fnordlicht firmware next generation
 *
 *    for additional information please
 *    see http://koeln.ccc.de/prozesse/running/fnordlicht
 *
 * (c) by Alexander Neumann <alexander@bumpern.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * For more information on the GPL, please go to:
 * http://www.gnu.org/copyleft/gpl.html
 }}} */

#ifndef RC5_H
#define RC5_H

#include "config.h"

#if RC5_DECODER

#include <inttypes.h>

/* warn, if F_CPU is not defined */
#ifndef F_CPU
#error F_CPU not defined
#endif


/* structs */
struct rc5_t {
    union {
        uint16_t raw;
        struct {
            uint8_t code:6;             /* first 6 bits: control code */
            uint8_t address:5;          /* next 5 bits: address */
            uint8_t toggle_bit:1;       /* next bit is the toggle bit */
            uint8_t spare:4;            /* spare bits */
        };
    };
};

struct global_rc5_t {
    struct rc5_t received_command;
    struct {
        uint8_t enabled:1;              /* if one, decoder is active */
        uint8_t new_data:1;             /* if one, new data is available */
    };
};

/* global variables */
extern volatile struct global_rc5_t global_rc5;

/* prototypes */
void init_rc5(void);

#endif

#endif