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#define INVALID         0x00
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#define INVALID         0x00
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#define NEWDATA         0x01
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#define NEWDATA         0x01
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#define PROCESSED       0x02
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#define UBX_CLASS_CFG   0x06
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#define PROCESSED       0x02
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typedef struct
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typedef struct
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{
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{
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        s32 Longitude;  // in 1E-7 deg
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        s32 Longitude;  // in 1E-7 deg
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// The data are valid if the GPSData.Status is NEWDATA or PROCESSED.
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// The data are valid if the GPSData.Status is NEWDATA or PROCESSED.
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// To achieve new data after reading the GPSData.Status should be set to PROCESSED.
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// To achieve new data after reading the GPSData.Status should be set to PROCESSED.
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extern gps_data_t  GPSData;
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#define UBX_CLASS_CFG   0x06
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extern gps_data_t  GPSData;
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#define UBX_CLASS_ACK   0x05
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typedef struct
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{
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        u8 Class;
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typedef struct
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        u8 Id;
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        u16 Length;
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}  __attribute__((packed)) ubxmsghdr_t;
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{
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typedef struct
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{
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        u8 Ack;                                 // 1: msg acknowledged, 0: not acknowledged
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        u8 ClassMask;
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        u8 IdMask;
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        u8 clsID;                               // the msg class
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        ubxmsghdr_t Hdr;
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        u8 msgID;                           // the msg id
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        u8 Data[100];
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        u8 Status;
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} __attribute__((packed)) ubxmsg_t;
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        u8 Status;                              // invalid/newdata/processed   
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// msg obj to reveive
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// set Class and Id and correspoinding masks of a message that should be received
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} __attribute__((packed)) ubx_ack_t;
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extern volatile ubxmsg_t UbxMsg;
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extern volatile ubx_ack_t UbxAck;
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extern u32 UBX_Timeout;
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extern u32 UBX_Timeout;
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