protocol.h

Cypress公司开发的2.4G无线键盘鼠标及其Bridge源代码

#define SAVED_SYS_PARAMS_LEN            sizeof(SYS_PARAMETERS) - 8


#else //MASTER_PROTOCOL, for slave
 
// Sys Params is structured to improve memory utilization.  It is used
// to read the mid out of flash and then is converted to system parameters
// that are used during operation.
typedef struct _SYS_PARAMETERS
{
    // Structure used for flash reads
    struct 
    {
        unsigned char signature;      // Parameters initialized and valid signature
        unsigned char mid_1;          // Manufacturing id of bound bridge
        unsigned char mid_2;
        unsigned char mid_3;
        unsigned char mid_4;

    } bridge_mid;

#ifdef ENCRYPT_TEA
    struct
    {
        unsigned long key[4];              
        unsigned char signature;
    } encrypt_key;
#endif    // ENCRYPT_TEA

    // Structure used for system operation
    struct 
    {
        unsigned char channel;        // Currently selected channel
        unsigned char pn_code;        // Currently selected pncode
        unsigned char seed;           // CRC seed used for transmissions
        unsigned char pin;            // Pin used for transmissions

    } network_id;

} SYS_PARAMETERS;



#define SAVED_SYS_PARAMS_LEN            sizeof(SYS_PARAMETERS) - 4

#endif //MASTER_PROTOCOL

//! Size of encryption key
#define ENCRYPT_KEY_SIZE  17 


//! To set up a data packet
typedef union _LP_PACKET
{
    //! To hold all data of bind request packet
    struct 
    {  
        //! To hold the header data of bind request packet
        struct
        {
            //! Reserved
            unsigned reserved   : 0x01;

            //! Type of device part of bind request packet
            unsigned dev_type   : 0x02;   

            //! Reserved
            unsigned reserved1  : 0x01;

            //! Type of bind request packet
            unsigned type       : 0x04;   
        } hdr;
    } bind_request;

    //! To hold the data of bind response packet
    struct 
    {  
        //! To hold the header data of bind response packet
        struct
        {
            //! Reserved
            unsigned reserved   : 0x01;

            //! Type of device part of bind request packet
            unsigned dev_type   : 0x02;   

            //! Reserved
            unsigned reserved1  : 0x01;

            //! Type of bind response packet
            unsigned type       : 0x04;   
        } hdr;

        //! 1st byte of radio manufacturing ID
        unsigned char mid_1;

        //! 2nd byte of radio manufacturing ID
        unsigned char mid_2;

        //! 3rd byte of radio manufacturing ID
        unsigned char mid_3;

        //! 4th byte of radio manufacturing ID
        unsigned char mid_4;
        
    } bind_response;

    //! To hold the data of connect request packet
    struct
    {  
        //! To hold the header data of connect request packet
        struct
        {
            //! Reserved
            unsigned reserved   : 0x01;

            //! Type of device part of bind request packet
            unsigned dev_type   : 0x02;   

            //! Reserved
            unsigned reserved1  : 0x01;

            //! Type of connect request packet
            unsigned type       : 0x04;   

        } hdr;

        //! 1st byte of radio manufacturing ID
        unsigned char mid_1;

        //! 2nd byte of radio manufacturing ID
        unsigned char mid_2;

        //! 3rd byte of radio manufacturing ID
        unsigned char mid_3;

        //! 4th byte of radio manufacturing ID
        unsigned char mid_4;

    } connect_request;

    //! To hold the data of connect response packet
    struct 
    {  
        //! To hold the header data of connect response packet
        struct
        {
            //! Reserved
            unsigned reserved   : 0x03;

            //! Data packet flag to tell whether it was a good or bad data
            unsigned flag       : 0x01;   

            //! Type of connect response packet
            unsigned type       : 0x04;   

        } hdr;

    } connect_response;

    //! To hold the data of the ping packet
    struct
    {
        //! To hold the header data of the ping packet
        struct
        {
            //! Specify a Ping (0) or Ping Response (1)
            unsigned flag       : 0x01;

            //! Reserved
            unsigned reserved   : 0x03;    

            //! Type of ping packet
            unsigned type       : 0x04;   
        } hdr;
    } ping;

    //! To hold the data of an data packet
    struct
    {
        //! To hold the header of a data packet
        struct
        {
            //! Type of device part of data packet
            unsigned data_dev_type   : 0x02;   // bit0 and bit1 swapped for backward compatible

            //! Data toggle information of data part of packet
            unsigned dt_data    : 0x01;   

            // Back channel request
            unsigned back_ch_req: 0x01;    

            //! Packet type
            unsigned type       : 0x04;   
        } hdr;

        //! Buffer to hold data packet
        unsigned char payload[PAYLOAD_LENGTH];

    } data;

    //! To hold the transmit data of null packet
    struct
    {
        //! To hold the transmit header data of null packet
        struct
        {
            //! Type of device part of null packet
            unsigned dev_type   : 0x02;   // bit0 and bit1 swapped for backward compatible

            //! Reserved
            unsigned reserved   : 0x02;    

            //! Type of data packet
            unsigned type       : 0x04;   

        } hdr;
    } null;

#ifdef ENCRYPT_TEA    
    struct
    {
        //! To hold the header data of the encrypted data packet
        unsigned char header;

        //! Buffer to hold part of encrypted data packet
        unsigned long payload[2];
    } encrypt;
#endif // ENCRYPT_TEA

#ifdef ENCRYPT_AES
    struct
    {
        //! Buffer to hold part of encrypted data packet
        unsigned char payload[16];
    } encrypt_aes;
#endif //ENCRYPT_AES

    //! To hold the first byte of the receive packet
    struct
    {
        //! First byte of receive packet
        unsigned char byte;
    } first;
   
} LP_PACKET;



//--------------------------------------
// Globals
//--------------------------------------

//! Packet for receiving data from the radio
extern LP_PACKET  rx_packet;

//! Packet for transmitting data to the radio
extern LP_PACKET  tx_packet;

//! The number of bytes in rx_packet per the radio
extern unsigned char rx_data_length;

//! A collection of system parameters for easy encapsulation
extern SYS_PARAMETERS sys_params;


//--------------------------------------
// API Function Declarations
//--------------------------------------

#ifdef MASTER_PROTOCOL

    extern void MasterProtocolInit(void);
    extern void MasterProtocolPingMode(unsigned char reason);
    extern void MasterProtocolButtonBindMode(unsigned short retry_count);
    extern void MasterProtocolDataMode( void );
    extern void MasterProtocolUnbind(void);

#else //MASTER_PROTOCOL

    extern void SlaveProtocolInit(void);
    extern void SlaveProtocolButtonBind(unsigned char dev_type);
    extern void SlaveProtocolReconnect(unsigned char dev_type);

    extern PROTOCOL_STATUS SlaveProtocolSendPacket(  unsigned char dev_type 
                                                     ,unsigned char data_dev_type 
                                                     ,unsigned char data_length 

#ifdef BACK_CHANNEL_SUPPORT
                                                     ,unsigned char back_channel
#endif //BACK_CHANNEL_SUPPORT
                                                     );   


    extern void* SlaveProtocolGetTxPkt(void);
    extern void SlaveProtocolUnbind(void);

#endif //MASTER_PROTOCOL

extern unsigned char RadioReceivePacket(void);
extern unsigned char RadioSendPacket(unsigned char retry, unsigned char length);
extern void RadioStartReceivePacket(void);

        
#endif // _PROTOCOL_H_