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#ifndef XBEE_H

#define XBEE_H

#define XBEE_BUFFER_SIZE        227

// If API mode = 2 is enabled

#define XBEE_USE_ESCAPE_CHAR

#define XBEE_ESCAPE_VAL         0x20

#define XBEE_START_DELIMITER    0x7E

#define XBEE_ESCAPE_CHAR        0x7D

#define XBEE_XON                0x11

#define XBEE_XOFF               0x13

// Expected 'next' state

#define XBEE_STATE_READ_START               10

#define XBEE_STATE_READ_LENGTH_HIGH         11

#define XBEE_STATE_READ_LENGTH_LOW          12

#define XBEE_STATE_READ_FRAME_DATA          13

#define XBEE_STATE_READ_CHECKSUM            14

// Command Frame Type

#define XBEE_TX_AT_COMMAND                  0x08

#define XBEE_TX_AT_COMMAND_QUEUE            0x09

#define XBEE_RX_AT_COMMAND_RESPONSE         0x88

#define XBEE_TX_DATA_PACKET                 0x10

#define XBEE_RX_DATA_PACKET                 0x90

#define XBEE_RX_DATA_TX_STATUS              0x8B

#define XBEE_RX_IO_DATA_SAMPLE              0x92

#define XBEE_TX_EXPLICIT_COMMAND            0x11

#define XBEE_RX_EXPLICIT_COMMAND            0x91

#define XBEE_TX_REMOTE_AT_COMMAND           0x17

#define XBEE_RX_REMOTE_AT_COMMAND_RESPONSE  0x97

#define XBEE_TX_CREATE_SOURCE_ROUTE         0x21

#define XBEE_RX_ROUTE_RECORD                0xA1

#define XBEE_RX_NODE_IDENTIFICATION         0x95

#define XBEE_RX_FRAME_MODEM_STATUS          0x8A

typedef struct {

    union {

        unsigned long long_value;

        char char_value[4]; // Little Endian!!

    } UPPER_32;

    union {

        unsigned long long_value;

        char char_value[4]; // Little Endian!!

    } LOWER_32;

} XBEE_ADDRESS_64;

typedef struct {

    union {

        unsigned int int_value;

        char char_value[2]; // Little Endian!!

    } INT_16;

} XBEE_ADDRESS_16;

// Unique Frame Components

typedef struct {

    char frame_type;

    char frame_id;

    char command[2];

    char data[XBEE_BUFFER_SIZE];

} XBEE_TX_AT_COMMAND_FRAME;

#define XBEE_TX_AT_COMMAND_FRAME_SIZE 4

typedef struct {

    char frame_type;

    char frame_id;

    char command[2];

    char data[XBEE_BUFFER_SIZE];

} XBEE_TX_AT_COMMAND_QUEUE_FRAME;

#define XBEE_TX_AT_COMMAND_QUEUE_FRAME_SIZE 4

typedef struct {

    char frame_type;

    char frame_id;

    char command[2];

    char command_status;

    char data[XBEE_BUFFER_SIZE];

} XBEE_RX_AT_COMMAND_RESPONSE_FRAME;

#define XBEE_RX_AT_COMMAND_RESPONSE_FRAME_SIZE 5

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_64 destination_64;

    XBEE_ADDRESS_16 destination_16;

    char broadcast_radius;

    char options;

    char data[XBEE_BUFFER_SIZE];

} XBEE_TX_DATA_PACKET_FRAME;

#define XBEE_TX_DATA_PACKET_FRAME_SIZE 14

typedef struct {

    char frame_type;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char recieve_options;

    char data[XBEE_BUFFER_SIZE];

} XBEE_RX_DATA_PACKET_FRAME;

#define XBEE_RX_DATA_PACKET_FRAME_SIZE 12

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_16 destination_16;

    char transmit_retry_count;

    char delivery_status;

    char discovery_status;

} XBEE_RX_DATA_TX_STATUS_FRAME;

#define XBEE_RX_DATA_TX_STATUS_FRAME_SIZE 7

typedef struct {

    char frame_type;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char recieve_options;

    char number_of_samples;

    char digital_ch_mask[2];

    char analog_ch_mask;

    char digital_samples[2];

    char analog_samples[8];

} XBEE_RX_IO_DATA_SAMPLE_FRAME;

#define XBEE_RX_IO_DATA_SAMPLE_FRAME_SIZE 26

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_64 destination_64;

    XBEE_ADDRESS_16 destination_16;

    char source_endpoint;

    char destination_endpoint;

    char cluster_id[2];

    char profile_id[2];

    char broadcast_radius;

    char transmit_options;

    char data[XBEE_BUFFER_SIZE];

} XBEE_TX_EXPLICIT_COMMAND_FRAME;

#define XBEE_TX_EXPLICIT_COMMAND_FRAME_SIZE 20

typedef struct {

    char frame_type;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char source_endpoint;

    char destination_endpoint;

    char cluster_id[2];

    char profile_id[2];

    char recieve_options;

    char data[XBEE_BUFFER_SIZE];

} XBEE_RX_EXPLICIT_COMMAND_FRAME;

#define XBEE_RX_EXPLICIT_COMMAND_FRAME_SIZE 18

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_64 destination_64;

    XBEE_ADDRESS_16 destination_16;

    char remote_options;

    char command[2];

    char data[XBEE_BUFFER_SIZE];

} XBEE_TX_REMOTE_AT_COMMAND_FRAME;

#define XBEE_TX_REMOTE_AT_COMMAND_FRAME_SIZE 15

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char command[2];

    char command_status;

    char command_data[4];

} XBEE_RX_REMOTE_AT_COMMAND_FRAME;

#define XBEE_RX_REMOTE_AT_COMMAND_FRAME_SIZE 19

typedef struct {

    char frame_type;

    char frame_id;

    XBEE_ADDRESS_64 destination_64;

    XBEE_ADDRESS_16 destination_16;

    char route_options;

    char num_of_addresses;

    char addresses[XBEE_BUFFER_SIZE];

} XBEE_TX_CREATE_SOURCE_ROUTE_FRAME;

#define XBEE_TX_CREATE_SOURCE_ROUTE_FRAME_SIZE 14

typedef struct {

    char frame_type;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char recieve_options;

    char num_of_addresses;

    char addresses[XBEE_BUFFER_SIZE];

} XBEE_RX_ROUTE_RECORD_FRAME;

#define XBEE_RX_ROUTE_RECORD_FRAME_SIZE 13

typedef struct {

    char frame_type;

    XBEE_ADDRESS_64 source_64;

    XBEE_ADDRESS_16 source_16;

    char recieve_options;

    XBEE_ADDRESS_16 remote_16;

    XBEE_ADDRESS_64 remote_64;

    char NI_string[2];

    XBEE_ADDRESS_16 parent_16;

    char device_type;

    char source_event;

    char profile_id[2];

    char manufacturer_id[2];

} XBEE_RX_NODE_IDENTIFICATION_INDICATOR_FRAME;

#define XBEE_RX_NODE_IDENTIFICATION_INDICATOR_FRAME_SIZE 32

typedef struct {

    char frame_type;

    char status;

} XBEE_RX_MODEM_STATUS_FRAME;

#define XBEE_RX_MODEM_STATUS_FRAME_SIZE 2

// Common Frame Components

typedef struct {

    char start_delimiter;

    XBEE_ADDRESS_16 length;

    union {

        XBEE_TX_AT_COMMAND_FRAME            TX_AT_COMMAND;

        XBEE_TX_AT_COMMAND_QUEUE_FRAME      TX_AT_COMMAND_QUEUE;

        XBEE_RX_AT_COMMAND_RESPONSE_FRAME   RX_AT_COMMAND_RESPONSE;

        XBEE_TX_DATA_PACKET_FRAME           TX_DATA_PACKET;

        XBEE_RX_DATA_PACKET_FRAME           RX_DATA_PACKET;

        XBEE_RX_DATA_TX_STATUS_FRAME        RX_DATA_TX_STATUS;

        XBEE_RX_IO_DATA_SAMPLE_FRAME        RX_IO_DATA_SAMPLE;

        XBEE_TX_EXPLICIT_COMMAND_FRAME      TX_EXPLICIT_COMMAND;

        XBEE_RX_EXPLICIT_COMMAND_FRAME      RX_EXPLICIT_COMMAND;

        XBEE_TX_REMOTE_AT_COMMAND_FRAME     TX_REMOTE_AT_COMMAND;

        XBEE_RX_REMOTE_AT_COMMAND_FRAME     RX_REMOTE_AT_COMMAND;

        XBEE_TX_CREATE_SOURCE_ROUTE_FRAME   TX_CREATE_SOURCE_ROUTE;

        XBEE_RX_ROUTE_RECORD_FRAME          RX_ROUTE_RECORD;

        XBEE_RX_NODE_IDENTIFICATION_INDICATOR_FRAME     RX_NODE_IDENTIFICATION;

        XBEE_RX_MODEM_STATUS_FRAME          RX_MODEM_STATUS;

    } FRAME;

} XBEE_FRAME;

// Overall Data Structure

typedef struct {

    XBEE_FRAME rcv_frame;

    unsigned int dataind;

    char checksum_sum;

    char read_state;

    char frame_rdy;

    char escape_flag;

} XBEE_DATA;

void XBee_Init(XBEE_DATA *data);

void XBee_Serial_In(char);

void XBee_Process_Received_Frame(void);

void XBee_Process_Transmit_Frame(char *data, char length);

unsigned int XBee_Get_Received_Frame(char *frame);

void XBee_Set_RTS(char);

char XBee_Read_CTS(void);

void XBee_Convert_Endian_64(XBEE_ADDRESS_64 *src);

void XBee_Convert_Endian_16(XBEE_ADDRESS_16 *src);

#endif