/*
 * Copyright (C) 2009 Freie Universität Berlin
 * Copyright (C) 2013 INRIA
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @defgroup    drivers_cc110x_legacy CC110x_legacy
 * @brief       Driver for Texas Instruments CC110x (without MAC protocol)
 * @ingroup     drivers
 * @{
 *
 * @file
 * @brief       Data structures and variables for the cc110x driver interface
 *
 * @author      Oliver Hahm <oliver.hahm@inria.fr>
 */

#ifndef CC110X_LEGACY_INTERFACE_H
#define CC110X_LEGACY_INTERFACE_H

#include <stdint.h>
#include "radio/radio.h"
#include "radio/types.h"
#include "cc110x-config.h"
#include "kernel_types.h"
#include "transceiver.h"

#ifdef __cplusplus
extern "C" {
#endif

#define CC1100_MAX_DATA_LENGTH      (58)

#define CC1100_HEADER_LENGTH         (3) /**< Header covers SRC, DST and FLAGS */

#define CC1100_BROADCAST_ADDRESS  (0x00) /**< CC1100 broadcast address */

#define MAX_UID                   (0xFF) /**< Maximum UID of a node is 255 */
#define MIN_UID                   (0x01) /**< Minimum UID of a node is 1 */

#define MIN_CHANNR                   (0) /**< Minimum channel number */
#define MAX_CHANNR                  (24) /**< Maximum channel number */

#define MIN_OUTPUT_POWER             (0) /**< Minimum output power value */
#define MAX_OUTPUT_POWER            (11) /**< Maximum output power value */

#define PACKET_LENGTH             (0x3E) /**< Packet length = 62 Bytes. */
#define CC1100_SYNC_WORD_TX_TIME (90000) /**< loop count (max. timeout ~15 ms)
                                          * to wait for sync word to be
                                          * transmitted (GDO2 from low to high) */
/**
 * @name    Defines used as state values for state machine
 * @{
 */
#define RADIO_UNKNOWN           (0)
#define RADIO_AIR_FREE_WAITING  (1)
#define RADIO_WOR               (2)
#define RADIO_IDLE              (3)
#define RADIO_SEND_BURST        (4)
#define RADIO_RX                (5)
#define RADIO_SEND_ACK          (6)
#define RADIO_PWD               (7)

/** @} */

extern volatile cc110x_flags rflags;    /**< Radio flags */
extern char cc110x_conf[];

/**
 * @brief   CC1100 layer 0 protocol
 *
 * <pre>
---------------------------------------------------
|        |         |         |       |            |
| Length | Address | PhySrc  | Flags |    Data    |
|        |         |         |       |            |
---------------------------------------------------
  1 byte   1 byte    1 byte   1 byte   <= 58 bytes

Flags:
        Bit | Meaning
        --------------------
        7:4 | -
        3:1 | Protocol
          0 | Identification
</pre>
Notes:
\li length & address are given by CC1100
\li Identification is increased is used to scan duplicates. It must be increased
    for each new packet and kept for packet retransmissions.
 */
typedef struct __attribute__((packed))
{
    uint8_t length;                         /**< Length of the packet (without length byte) */
    uint8_t address;                        /**< Destination address */
    uint8_t phy_src;                        /**< Source address (physical source) */
    uint8_t flags;                          /**< Flags */
    uint8_t data[CC1100_MAX_DATA_LENGTH];   /**< Data (high layer protocol) */
}
cc110x_packet_t;

typedef struct {
    uint8_t rssi;
    uint8_t lqi;
    cc110x_packet_t packet;
} rx_buffer_t;

enum radio_mode {
    RADIO_MODE_GET  = -1,       /**< leave mode unchanged */
    RADIO_MODE_OFF  = 0,        /**< turn radio off */
    RADIO_MODE_ON   = 1         /**< turn radio on */
};

extern rx_buffer_t cc110x_rx_buffer[];

extern volatile uint8_t rx_buffer_next;     /**< Next packet in RX queue */

extern volatile uint8_t radio_state;        /**< Radio state */
extern cc110x_statistic_t cc110x_statistic;

void cc110x_init(kernel_pid_t transceiver_pid);

void cc110x_rx_handler(void);

int8_t cc110x_send(cc110x_packet_t *pkt);

uint8_t cc110x_get_buffer_pos(void);

void cc110x_setup_rx_mode(void);
void cc110x_switch_to_rx(void);
void cc110x_wakeup_from_rx(void);
void cc110x_switch_to_pwd(void);

void cc110x_disable_interrupts(void);
int16_t cc110x_set_config_channel(uint8_t channr);
int16_t cc110x_set_channel(uint8_t channr);
int16_t cc110x_get_channel(void);

radio_address_t cc110x_set_address(radio_address_t addr);
radio_address_t cc110x_set_config_address(radio_address_t addr);
radio_address_t cc110x_get_address(void);
void cc110x_set_monitor(uint8_t mode);

void cc110x_print_config(void);

/**
 * @brief   GDO0 interrupt handler.
 */
void cc110x_gdo0_irq(void);

/**
 * @brief   GDO2 interrupt handler.
 *
 * @note    Wakes up MCU on packet reception.
 */
void cc110x_gdo2_irq(void);

#ifdef DBG_IGNORE
/**
 * @brief   Initialize ignore function
 */
void cc110x_init_ignore(void);

/**
 * @brief       Adds a address to the ignore list
 *
 * @param addr  The physical address to be ignored
 *
 * @return      0 if list is full, 1 otherwise
 *
 */
uint8_t cc110x_add_ignored(radio_address_t addr);
#endif

#ifdef __cplusplus
}
#endif

/** @} */
#endif /* CC110X_LEGACY_INTERFACE_H */