rfcommf.h

#include "headers.h"
//EA一直为1;
//对于SABM/UA/DM/DISC这几个命令帧：initiator(客户端)发给responder以及responder对其的回应，CR=1;
//对于SABM/UA/DM/DISC这几个命令帧：responder发给initiator以及initiator对其的回应，CR=0; 
//对于UIH数据帧,initiator发送给responder,CR=1，response发送给initiator CR=0;
typedef union
{
    unsigned char unused;
    struct
    {
        unsigned char EA:1;
        unsigned char CR:1;
        unsigned char D:1;
        unsigned char ServerChannel:5;
    };
}rcFrameAddress;

//连接命令
#define RC_CONTROL_SABM (0x2f)
//对SABM/DISC的应答
#define RC_CONTROL_UA (0x63)
//断开模式下收到DISC则回复DM
#define RC_CONTROL_DM (0x0f)
//断开连接指令
#define RC_CONTROL_DISC (0x43)
//数据帧
#define RC_CONTROL_UIH (0xef)
typedef union
{
    unsigned char init;
    struct
    {
        unsigned char b0:1;
        unsigned char b1:1;
        unsigned char b2:1;
        unsigned char b3:1;
        unsigned char PF:1;
        unsigned char b5:1;
        unsigned char b6:1;
        unsigned char b7:1;
    };
}rcFrameControl;

typedef union
{
    unsigned char unused;
    struct
    {
        unsigned char EA:1;
        unsigned char length:7;
    };
}rcFrameLength1;

typedef union
{
    unsigned short unused;
    struct
    {
        unsigned char EA:1;
        unsigned short length:15;
    };
}rcFrameLength2;

//-----------------------------------------1.rfcomm SAMB/UA/DM/DISC帧----------------------------------------//
typedef struct
{
    rcFrameAddress address;
    rcFrameControl control;
    rcFrameLength1 length;
    char fcs;
}rcCommandFrame;
//---------------------------------------------------------------------------------------------------------------------------//

//-----------------------------------------2.rfcomm UIH帧----------------------------------------//
typedef struct
{
    rcFrameAddress address;
    rcFrameControl control;
    rcFrameLength1 length;
    //+rcFramePN或者+rcFrameMSC
    //+FCS
}rcDataFrame;
//------------------------------------------------------------------------------------------------------//

#define RC_PN_PAYLOAD (0xa)
#define RC_PN_TYPE_C (0x83)
#define RC_PN_TYPE_R (0x81)
#define RC_PN_CL_C (0xf)
#define RC_PN_CL_R (0xe)
typedef struct
{
    char type;
    rcFrameLength1 length;//EA=1,length=8
    //1
    union
    {
        char D_bits;
        struct
        {
            unsigned char direction:1;
            unsigned char serverChannel:5;
            unsigned char zeroBits:2;
        };
    };
    //2
    union
    {
        char LCL_bits;
        struct
        {
            unsigned char L_bits:4; //0
            unsigned char CL_bits:4;
        };
    };
    //3
    union
    {
        char P_bits;
        struct
        {
            unsigned char priority:6; //优先级,可设置为0-63
            unsigned char zeroBits2:2;//0
        };
    };
    //4
    char T_bits;//0
    //5 and 6
    unsigned short maxFrameSize;
    //7
    char NA_bits;//0
    //8
    union
    {
        char K_bits;
        struct
        {
            unsigned char credit:3; //可设置为0-7
            unsigned char zeroBits3:5;//0
        };
    };

}rcFramePN;

#define RC_MSC_PAYLOAD (0x4)
#define RC_MSC_TYPE (0x38)
typedef struct
{
    //1
    union
    {
        char type_byte;
        struct
        {
            unsigned char EA:1;
            unsigned char CR:1;
            char type:6;
        };
    };
    //2
    rcFrameLength1 length;
    //3
    union
    {
        char dlci_byte:8;
        struct
        {
            unsigned char EA2:1;
            unsigned char onesPadding:1;
            unsigned char direction:1;
            unsigned char channel:5;
        };
    };
    //4
    union
    {
        char v24_byte:8;
        struct
        {
            unsigned char EA3:1;//1
            unsigned char FC:1;//1
            unsigned char RTC:1;
            unsigned char RTR:1;
            unsigned char unused:2;//0
            unsigned char IC:1;
            unsigned char DV:1;
        };
    };
}rcFrameMSC;

//-----------------------------------------------------------------fcs计算-------------------------------------------------//
const static unsigned char __crctable[256] =
{
    0x00, 0x91, 0xE3, 0x72, 0x07, 0x96, 0xE4, 0x75,
    0x0E, 0x9F, 0xED, 0x7C, 0x09, 0x98, 0xEA, 0x7B,
    0x1C, 0x8D, 0xFF, 0x6E, 0x1B, 0x8A, 0xF8, 0x69,
    0x12, 0x83, 0xF1, 0x60, 0x15, 0x84, 0xF6, 0x67,
    0x38, 0xA9, 0xDB, 0x4A, 0x3F, 0xAE, 0xDC, 0x4D,
    0x36, 0xA7, 0xD5, 0x44, 0x31, 0xA0, 0xD2, 0x43,
    0x24, 0xB5, 0xC7, 0x56, 0x23, 0xB2, 0xC0, 0x51,
    0x2A, 0xBB, 0xC9, 0x58, 0x2D, 0xBC, 0xCE, 0x5F,
    0x70, 0xE1, 0x93, 0x02, 0x77, 0xE6, 0x94, 0x05,
    0x7E, 0xEF, 0x9D, 0x0C, 0x79, 0xE8, 0x9A, 0x0B,
    0x6C, 0xFD, 0x8F, 0x1E, 0x6B, 0xFA, 0x88, 0x19,
    0x62, 0xF3, 0x81, 0x10, 0x65, 0xF4, 0x86, 0x17,
    0x48, 0xD9, 0xAB, 0x3A, 0x4F, 0xDE, 0xAC, 0x3D,
    0x46, 0xD7, 0xA5, 0x34, 0x41, 0xD0, 0xA2, 0x33,
    0x54, 0xC5, 0xB7, 0x26, 0x53, 0xC2, 0xB0, 0x21,
    0x5A, 0xCB, 0xB9, 0x28, 0x5D, 0xCC, 0xBE, 0x2F,
    0xE0, 0x71, 0x03, 0x92, 0xE7, 0x76, 0x04, 0x95,
    0xEE, 0x7F, 0x0D, 0x9C, 0xE9, 0x78, 0x0A, 0x9B,
    0xFC, 0x6D, 0x1F, 0x8E, 0xFB, 0x6A, 0x18, 0x89,
    0xF2, 0x63, 0x11, 0x80, 0xF5, 0x64, 0x16, 0x87,
    0xD8, 0x49, 0x3B, 0xAA, 0xDF, 0x4E, 0x3C, 0xAD,
    0xD6, 0x47, 0x35, 0xA4, 0xD1, 0x40, 0x32, 0xA3,
    0xC4, 0x55, 0x27, 0xB6, 0xC3, 0x52, 0x20, 0xB1,
    0xCA, 0x5B, 0x29, 0xB8, 0xCD, 0x5C, 0x2E, 0xBF,
    0x90, 0x01, 0x73, 0xE2, 0x97, 0x06, 0x74, 0xE5,
    0x9E, 0x0F, 0x7D, 0xEC, 0x99, 0x08, 0x7A, 0xEB,
    0x8C, 0x1D, 0x6F, 0xFE, 0x8B, 0x1A, 0x68, 0xF9,
    0x82, 0x13, 0x61, 0xF0, 0x85, 0x14, 0x66, 0xF7,
    0xA8, 0x39, 0x4B, 0xDA, 0xAF, 0x3E, 0x4C, 0xDD,
    0xA6, 0x37, 0x45, 0xD4, 0xA1, 0x30, 0x42, 0xD3,
    0xB4, 0x25, 0x57, 0xC6, 0xB3, 0x22, 0x50, 0xC1,
    0xBA, 0x2B, 0x59, 0xC8, 0xBD, 0x2C, 0x5E, 0xCF
};
 
 #define RC_FCS_SIZE_COMMAND (3)
 #define RC_FCS_SIZE_DATA (2)
unsigned char calc_fcs(const void *buf, int n)
{
    unsigned char fcs = 0xFF;
    int i;
    for(i=0; i<n; i++)
    {
        fcs = __crctable[fcs ^ ((unsigned char *)buf)[i]];
    }
    return (0xFF - fcs);
}
//-----------------------------------------------------------------------------------------------------------------------------//