This class provides an API to communicate with a u-blox GNSS chip. The files here were originally part of the C027_Support library (https://developer.mbed.org/teams/ublox/code/C027_Support/ at revision 138:dafbbf31bf76) but have been separated out, primarily for use on the u-blox C030 board where the cellular interace portion of the C027_Support library will instead be provided through the new mbed Cellular API.
Dependents: example-ublox-at-cellular-interface-ext example-low-power-sleep example-C030-out-of-box-demo example-C030-out-of-box-demo ... more
Diff: gnss.h
- Revision:
- 33:75163fa7e453
- Parent:
- 30:de9fcdbc4d06
--- a/gnss.h Wed Apr 24 17:55:48 2019 +0500 +++ b/gnss.h Wed May 29 16:45:00 2019 +0500 @@ -53,68 +53,68 @@ enum eUBX_MESSAGE {UBX_LOG_BATCH, UBX_ACK_ACK, UBX_ACK_NAK, UBX_NAV_ODO, UBX_NAV_PVT, UBX_NAV_STATUS, UBX_NAV_SAT, UNKNOWN_UBX}; typedef struct UBX_ACK_ACK { - uint8_t msg_class; - uint8_t msg_id; + uint8_t msg_class; + uint8_t msg_id; -}tUBX_ACK_ACK; +} tUBX_ACK_ACK; typedef struct UBX_NAV_ODO { - uint8_t version; - uint8_t reserved[3]; - uint32_t itow; - uint32_t distance; - uint32_t totalDistance; - uint32_t distanceSTD; -}tUBX_NAV_ODO; + uint8_t version; + uint8_t reserved[3]; + uint32_t itow; + uint32_t distance; + uint32_t totalDistance; + uint32_t distanceSTD; +} tUBX_NAV_ODO; typedef struct UBX_NAV_PVT { - uint32_t itow; - uint16_t year; - uint8_t month; - uint8_t day; - uint8_t fixType; + uint32_t itow; + uint16_t year; + uint8_t month; + uint8_t day; + uint8_t fixType; uint8_t flag1; // gnssFixOK, diffSoln, psmState, headVehValid and carrSoln. - int32_t lon; // scaling 1e-7 - int32_t lat; // scaling 1e-7 - int32_t height; - int32_t speed; + int32_t lon; // scaling 1e-7 + int32_t lat; // scaling 1e-7 + int32_t height; + int32_t speed; -}tUBX_NAV_PVT; +} tUBX_NAV_PVT; typedef struct UBX_LOG_BATCH { - uint32_t itow; - int32_t lon; // scaling 1e-7 - int32_t lat; // scaling 1e-7 - int32_t height; - uint32_t distance; - uint32_t totalDistance; - uint32_t distanceSTD; + uint32_t itow; + int32_t lon; // scaling 1e-7 + int32_t lat; // scaling 1e-7 + int32_t height; + uint32_t distance; + uint32_t totalDistance; + uint32_t distanceSTD; -}tUBX_LOG_BATCH; +} tUBX_LOG_BATCH; typedef struct UBX_CFG_BATCH { - uint32_t version; - uint8_t flags; - uint32_t bufSize; - uint32_t notifThrs; - uint8_t pioId; - uint8_t reserved1; + uint32_t version; + uint8_t flags; + uint32_t bufSize; + uint32_t notifThrs; + uint8_t pioId; + uint8_t reserved1; -}tUBX_CFG_BATCH; +} tUBX_CFG_BATCH; -typedef struct UBX_NAV_STATUS{ - uint32_t itow; - uint8_t fix; - uint8_t flags; - uint32_t ttff; - uint32_t msss; +typedef struct UBX_NAV_STATUS { + uint32_t itow; + uint8_t fix; + uint8_t flags; + uint32_t ttff; + uint32_t msss; -}tUBX_NAV_STATUS; +} tUBX_NAV_STATUS; -typedef struct UBX_NAV_SAT{ - bool status; +typedef struct UBX_NAV_SAT { + bool status; -}tUBX_NAV_SAT; +} tUBX_NAV_SAT; /** Basic GNSS parser class. */ @@ -131,45 +131,45 @@ /** Power-on/wake-up the GNSS. */ virtual bool init(PinName pn) = 0; - - enum { + + enum { // getLine Responses WAIT = -1, //!< wait for more incoming data (the start of a message was found, or no data available) NOT_FOUND = 0, //!< a parser concluded the the current offset of the pipe doe not contain a valid message - - #define LENGTH(x) (x & 0x00FFFF) //!< extract/mask the length - #define PROTOCOL(x) (x & 0xFF0000) //!< extract/mask the type - UNKNOWN = 0x000000, //!< message type is unknown +#define LENGTH(x) (x & 0x00FFFF) //!< extract/mask the length +#define PROTOCOL(x) (x & 0xFF0000) //!< extract/mask the type + + UNKNOWN = 0x000000, //!< message type is unknown UBX = 0x100000, //!< message if of protocol NMEA NMEA = 0x200000 //!< message if of protocol UBX }; - + /** Get a line from the physical interface. This function * needs to be implemented in the inherited class. * @param buf the buffer to store it. * @param len size of the buffer. - * @return type and length if something was found, + * @return type and length if something was found, * WAIT if not enough data is available, * NOT_FOUND if nothing was found - */ + */ virtual int getMessage(char* buf, int len) = 0; - + /** Send a buffer. * @param buf the buffer to write. * @param len size of the buffer to write. * @return bytes written. */ virtual int send(const char* buf, int len); - - /** send a NMEA message, this function just takes the + + /** send a NMEA message, this function just takes the * payload and calculates and adds checksum. ($ and *XX\r\n will be added). * @param buf the message payload to write. * @param len size of the message payload to write. * @return total bytes written. */ virtual int sendNmea(const char* buf, int len); - + /** Send a UBX message, this function just takes the * payload and calculates and adds checksum. * @param cls the UBX class id. @@ -178,27 +178,27 @@ * @param len size of the message payload to write. * @return total bytes written. */ - virtual int sendUbx(unsigned char cls, unsigned char id, + virtual int sendUbx(unsigned char cls, unsigned char id, const void* buf = NULL, int len = 0); - + /** Power off the GNSS, it can be again woken up by an - * edge on the serial port on the external interrupt pin. + * edge on the serial port on the external interrupt pin. */ void powerOff(void); - - /** Cuts off the power supply of GNSS by disabling gnssEnable pin - * Backup supply is provided, can turn it on again by enabling PA15 - */ + + /** Cuts off the power supply of GNSS by disabling gnssEnable pin + * Backup supply is provided, can turn it on again by enabling PA15 + */ void cutOffPower(void); - + /** get the first character of a NMEA field. * @param ix the index of the field to find. * @param start the start of the buffer. * @param end the end of the buffer. - * @return the pointer to the first character of the field. + * @return the pointer to the first character of the field. */ static const char* findNmeaItemPos(int ix, const char* start, const char* end); - + /** Extract a double value from a buffer containing a NMEA message. * @param ix the index of the field to extract. * @param buf the NMEA message. @@ -207,7 +207,7 @@ * @return true if successful, false otherwise. */ static bool getNmeaItem(int ix, char* buf, int len, double& val); - + /** Extract a interger value from a buffer containing a NMEA message. * @param ix the index of the field to extract. * @param buf the NMEA message. @@ -217,7 +217,7 @@ * @return true if successful, false otherwise. */ static bool getNmeaItem(int ix, char* buf, int len, int& val, int base/*=10*/); - + /** Extract a char value from a buffer containing a NMEA message. * @param ix the index of the field to extract. * @param buf the NMEA message. @@ -226,7 +226,7 @@ * @return true if successful, false otherwise. */ static bool getNmeaItem(int ix, char* buf, int len, char& val); - + /** Extract a latitude/longitude value from a buffer containing a NMEA message. * @param ix the index of the field to extract (will extract ix and ix + 1), * @param buf the NMEA message, @@ -237,11 +237,11 @@ static bool getNmeaAngle(int ix, char* buf, int len, double& val); /** Enable UBX messages. - * @param none - * @return 1 if successful, false otherwise. - */ + * @param none + * @return 1 if successful, false otherwise. + */ int enable_ubx(); - + /** GET Message type of receiver UBX message * @param buff the UXB message * @return eUBX_MESSAGE @@ -261,33 +261,33 @@ tUBX_NAV_ODO decode_ubx_nav_odo_msg(char *); /** Method to parse contents of UBX_NAV_PVT and return decoded msg - * @param buff the UXB message - * @return tUBX_NAV_PVT - */ + * @param buff the UXB message + * @return tUBX_NAV_PVT + */ tUBX_NAV_PVT decode_ubx_nav_pvt_msg(char *); /** Method to parse contents of UBX_LOG_BATCH and return decoded msg - * @param buff the UXB message - * @return tUBX_LOG_BATCH - */ + * @param buff the UXB message + * @return tUBX_LOG_BATCH + */ tUBX_LOG_BATCH decode_ubx_log_batch_msg(char *); /** Method to parse contents of UBX_NAV_STATUS and return decoded msg - * @param buff the UXB message - * @return tUBX_NAV_STATUS - */ + * @param buff the UXB message + * @return tUBX_NAV_STATUS + */ tUBX_NAV_STATUS decode_ubx_nav_status_msg(char *); /** Method to parse contents of UBX_NAV_SAT and return decoded msg - * @param buff the UXB message, int length - * @return tUBX_NAV_SAT - */ + * @param buff the UXB message, int length + * @return tUBX_NAV_SAT + */ tUBX_NAV_SAT decode_ubx_nav_sat_msg(char *, int); /** Method to send UBX LOG-RETRIEVEBATCH msg. This message is used to request batched data. - * @param bool - * @return int - */ + * @param bool + * @return int + */ int ubx_request_batched_data(bool sendMonFirst = false); protected: @@ -299,43 +299,43 @@ * @param pipe the receiveing pipe to parse messages . * @param buf the buffer to store it. * @param len size of the buffer. - * @return type and length if something was found, + * @return type and length if something was found, * WAIT if not enough data is available, * NOT_FOUND if nothing was found. - */ + */ static int _getMessage(Pipe<char>* pipe, char* buf, int len); - + /** Check if the current offset of the pipe contains a NMEA message. * @param pipe the receiveing pipe to parse messages. * @param len numer of bytes to parse at maximum. * @return length if something was found (including the NMEA frame), * WAIT if not enough data is available, * NOT_FOUND if nothing was found. - */ + */ static int _parseNmea(Pipe<char>* pipe, int len); - + /** Check if the current offset of the pipe contains a UBX message. * @param pipe the receiveing pipe to parse messages. * @param len numer of bytes to parse at maximum. * @return length if something was found (including the UBX frame), * WAIT if not enough data is available, * NOT_FOUND if nothing was found. - */ + */ static int _parseUbx(Pipe<char>* pipe, int len); - - /** Write bytes to the physical interface. This function - * needs to be implemented by the inherited class. + + /** Write bytes to the physical interface. This function + * needs to be implemented by the inherited class. * @param buf the buffer to write. * @param len size of the buffer to write. * @return bytes written. */ virtual int _send(const void* buf, int len) = 0; - + static const char _toHex[16]; //!< num to hex conversion DigitalInOut *_gnssEnable; //!< IO pin that enables GNSS }; -/** GNSS class which uses a serial port as physical interface. +/** GNSS class which uses a serial port as physical interface. */ class GnssSerial : public SerialPipe, public GnssParser { @@ -350,29 +350,29 @@ GnssSerial(PinName tx GNSS_IF( = GNSSTXD, = D8 /* = D8 */), // resistor on shield not populated PinName rx GNSS_IF( = GNSSRXD, = D9 /* = D9 */), // resistor on shield not populated int baudrate GNSS_IF( = GNSSBAUD, = 9600 ), - int rxSize = 512 , + int rxSize = 512, int txSize = 512 ); - + /** Destructor. */ virtual ~GnssSerial(void); - + /** Initialise the GNSS device. * @param pn NOT USED. * @param baudrate * @return true if successful, otherwise false. */ virtual bool init(PinName pn = NC); - - /** Get a line from the physical interface. + + /** Get a line from the physical interface. * @param buf the buffer to store it. * @param len size of the buffer. - * @return type and length if something was found, + * @return type and length if something was found, * WAIT if not enough data is available, * NOT_FOUND if nothing was found. - */ + */ virtual int getMessage(char* buf, int len); - + protected: /** Write bytes to the physical interface. * @param buf the buffer to write. @@ -386,7 +386,7 @@ */ class GnssI2C : public I2C, public GnssParser { -public: +public: /** Constructor. * @param sda is the I2C SDA pin (between CPU and GNSS). * @param scl is the I2C SCL pin (CPU to GNSS). @@ -400,38 +400,38 @@ /** Destructor */ virtual ~GnssI2C(void); - + /** Helper function to probe the i2c device. * @param pn the power-on pin for the chip. * @return true if successfully detected the GNSS chip. - */ + */ virtual bool init(PinName pn = GNSS_IF( NC, NC /* D7 resistor R67 on shield not mounted */)); - - /** Get a line from the physical interface. + + /** Get a line from the physical interface. * @param buf the buffer to store it. * @param len size of the buffer. - * @return type and length if something was found, + * @return type and length if something was found, * WAIT if not enough data is available, * NOT_FOUND if nothing was found. - */ + */ virtual int getMessage(char* buf, int len); - + /** Send a buffer. * @param buf the buffer to write. * @param len size of the buffer to write. * @return bytes written. */ virtual int send(const char* buf, int len); - - /** Send an NMEA message, this function just takes the + + /** Send an NMEA message, this function just takes the * payload and calculates and adds checksum ($ and *XX\r\n will be added). * @param buf the message payload to write. * @param len size of the message payload to write. * @return total bytes written. */ virtual int sendNmea(const char* buf, int len); - - /** Send a UBX message, this function just takes the + + /** Send a UBX message, this function just takes the * payload and calculates and adds checksum. * @param cls the UBX class id. * @param id the UBX message id. @@ -439,35 +439,40 @@ * @param len size of the message payload to write. * @return total bytes written. */ - virtual int sendUbx(unsigned char cls, unsigned char id, + virtual int sendUbx(unsigned char cls, unsigned char id, const void* buf = NULL, int len = 0); - + protected: /** Check if the port is writeable (like SerialPipe) - * @return true if writeable + * @return true if writeable */ - bool writeable(void) {return true;} - + bool writeable(void) { + return true; + } + /** Write a character (like SerialPipe). * @param c the character to write. * @return true if succesffully written . */ - bool putc(int c) {char ch = c; return send(&ch, 1);} - + bool putc(int c) { + char ch = c; + return send(&ch, 1); + } + /** Write bytes to the physical interface. * @param buf the buffer to write. * @param len size of the buffer to write. * @return bytes written. */ virtual int _send(const void* buf, int len); - + /** Read bytes from the physical interface. * @param buf the buffer to read into. * @param len size of the read buffer . * @return bytes read. */ int _get(char* buf, int len); - + Pipe<char> _pipe; //!< the rx pipe. unsigned char _i2cAdr; //!< the i2c address. static const char REGLEN; //!< the length i2c register address.