GPS/GNSS UBX library for UART
Dependencies: Vector3
GPSUBX_UART.hpp
- Committer:
- cocorlow
- Date:
- 2021-09-20
- Revision:
- 9:874d7633e358
- Parent:
- 8:1eb5f701a0d0
- Child:
- 10:a90d07e4c34d
File content as of revision 9:874d7633e358:
#ifndef __GPSUBX_UART_HPP__ #define __GPSUBX_UART_HPP__ #include "mbed.h" #include "Vector3.hpp" #define POSECEF_LEN 20 #define POSLLH_LEN 28 #define TIMEUTC_LEN 20 #define VELECEF_LEN 20 #define VELNED_LEN 36 #define UBX_SYNC 0x62 << 8 | 0xb5 #define RECEIVE_SIZE 1024 #define SENTENCE_SIZE 64 extern Serial pc; //// 0x01 0x01 //union POSECEF //{ // char byte_data[POSECEF_LEN+8]; // struct // { // unsigned short sync; // char m_class; // char m_id; // unsigned short pay_len; // unsigned int iTOW; // int ecefX; // int ecefY; // int ecefZ; // unsigned int pAcc; // char check_a; // char check_b; // } data; //}; // 0x01 0x02 union POSLLH { char byte_data[POSLLH_LEN]; struct { unsigned int iTOW; int lon; int lat; int height; int hMSL; unsigned int hAcc; unsigned int vAcc; } data; }; // 0x01 0x21 union TIMEUTC { char byte_data[TIMEUTC_LEN]; struct { unsigned int iTOW; unsigned int tAcc; int nano; unsigned short year; unsigned char month; unsigned char day; unsigned char hour; unsigned char min; unsigned char sec; unsigned char valid; } data; }; //// 0x01 0x11 //union VELECEF //{ // char byte_data[VELECEF_LEN]; // struct // { // unsigned int iTOW; // int ecefVX; // int ecefVY; // int ecefVZ; // unsigned int sAcc; // } data; //}; // 0x01 0x12 union VELNED { char byte_data[VELNED_LEN]; struct { unsigned int iTOW; int velN; int velE; int velD; unsigned int speed; unsigned int gSpeed; signed int heading; unsigned int sAcc; unsigned int cAcc; } data; }; /**GPS/GNSS library for UART (UBX protocol) * RX pin is required. @code #include "mbed.h" #include "GPSUBX_UART.cpp" Serial pc(USBTX, USBRX, 115200); GPSUBX_UART gps(PD_1, PD_0); // mbed Nucleo 767 void Display() { pc.printf("POSLLH: %d, %f, %f, %f\r\n", gps.iTOW_POSLLH, gps.Longitude, gps.Latitude, gps.Height); pc.printf("VELNED: %d, %f, %f, %f\r\n", gps.iTOW_VELNED, gps.VelocityNED.x, gps.VelocityNED.y, gps.VelocityNED.z); pc.printf("TIMEUTC: %4d/%2d/%2d %2d:%2d %2d\r\n", gps.Year, gps.Month, gps.Day, gps.Hours, gps.Minutes, gps.Seconds); } int main() { gps.Attach(); int timer = 0; while (1) { gps.Update(); wait(0.1); timer++; if (timer >= 5) { Display(); timer = 0; } } } @endcode */ class GPSUBX_UART { private: RawSerial serial; char receive_buffer[RECEIVE_SIZE]; char sentence_buffer[SENTENCE_SIZE]; static const float Radius = 6378136.6f; volatile int receive_index; void Receive(); void Decode(char buffer[], int mc, int mi); public: int dummy; // Compiler bug? If "dummy" does not exist, the value of "Year" (under "public:") may include bugs. /**Year*/ volatile int Year; /**Month*/ volatile int Month; /**Day*/ volatile int Day; /**Hours*/ volatile int Hours; /**Minutes*/ volatile int Minutes; /**Seconds*/ volatile int Seconds; /**Longitude (deg)*/ volatile float Longitude; /**Latitude (deg)*/ volatile float Latitude; /**Height [m]*/ volatile float Height; /**iTOW of POSLLH [ms]*/ volatile int iTOW_POSLLH; /**Velocity NED [m/s]*/ volatile Vector3 VelocityNED; /**Speed [m/s]*/ volatile float Speed; /**Ground speed [m/s]*/ volatile float GroundSpeed; /**Heading angle (deg) */ volatile float Heading; /**iTOW of VELNED [ms]*/ volatile int iTOW_VELNED; /**Time zone*/ volatile int TimeZone; Vector3 UniversalZeroPosition; Vector3 UniversalZeroUnitN; Vector3 UniversalZeroUnitE; Vector3 UniversalZeroUnitD; Vector3 UniversalPosition; /**Position NED [m]*/ Vector3 PositionNED; /**Constructor *@param tx UART TX pin *@param rx UART RX pin *@param baud UART baud rate (default: 38400) *@param timezone Time zone (default: +9) */ GPSUBX_UART(PinName tx, PinName rx, int baud = 38400, int timezone = +9); /**call Update() regularly in the main loop */ void Update(); /**call Attach() once before measuring position */ void Attach(); Vector3 ToUniversalUnit(); Vector3 ToUniversal(); void CalculateUnit(); /**call Calculate() before calculating PositionNED */ void Calculate(); Vector3 Calculate(Vector3 position); static void Checksum(char payload[], int n, char* ck_a, char* ck_b); }; #endif