Luca Antolini
/
AAA_Stabilus322699_LA0021
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Dependencies: mbed QEI PID DmTftLibraryEx
Peripherals/GpsMax7.cpp@0:9c0917bfde97, 2017-03-13 (annotated)
- Committer:
- GregCr
- Date:
- Mon Mar 13 15:12:05 2017 +0000
- Revision:
- 0:9c0917bfde97
alpha release
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| GregCr | 0:9c0917bfde97 | 1 | /* |
| GregCr | 0:9c0917bfde97 | 2 | ______ _ |
| GregCr | 0:9c0917bfde97 | 3 | / _____) _ | | |
| GregCr | 0:9c0917bfde97 | 4 | ( (____ _____ ____ _| |_ _____ ____| |__ |
| GregCr | 0:9c0917bfde97 | 5 | \____ \| ___ | (_ _) ___ |/ ___) _ \ |
| GregCr | 0:9c0917bfde97 | 6 | _____) ) ____| | | || |_| ____( (___| | | | |
| GregCr | 0:9c0917bfde97 | 7 | (______/|_____)_|_|_| \__)_____)\____)_| |_| |
| GregCr | 0:9c0917bfde97 | 8 | (C)2016 Semtech |
| GregCr | 0:9c0917bfde97 | 9 | |
| GregCr | 0:9c0917bfde97 | 10 | Description: uBlox MAX7 GPS |
| GregCr | 0:9c0917bfde97 | 11 | |
| GregCr | 0:9c0917bfde97 | 12 | Maintainer: Gregory Cristian & Gilbert Menth |
| GregCr | 0:9c0917bfde97 | 13 | */ |
| GregCr | 0:9c0917bfde97 | 14 | |
| GregCr | 0:9c0917bfde97 | 15 | #include <stdio.h> |
| GregCr | 0:9c0917bfde97 | 16 | #include "mbed.h" |
| GregCr | 0:9c0917bfde97 | 17 | #include "Timers.h" |
| GregCr | 0:9c0917bfde97 | 18 | #include "GpsMax7.h" |
| GregCr | 0:9c0917bfde97 | 19 | |
| GregCr | 0:9c0917bfde97 | 20 | |
| GregCr | 0:9c0917bfde97 | 21 | #define MAX_NMEA_SENTENCE_LENGTH 100 |
| GregCr | 0:9c0917bfde97 | 22 | #define GPS_I2C_ADDR ( 0x84 ) // GPS IC I2C address |
| GregCr | 0:9c0917bfde97 | 23 | #define NUM_SETUP_COMMANDS 7 |
| GregCr | 0:9c0917bfde97 | 24 | #define SETUP_COMMAND_LENGTH 16 |
| GregCr | 0:9c0917bfde97 | 25 | #define DATA_STREAM_ADDRESS 0xFF |
| GregCr | 0:9c0917bfde97 | 26 | #define I2C_FREQUENCY 100000 //100 kHz |
| GregCr | 0:9c0917bfde97 | 27 | |
| GregCr | 0:9c0917bfde97 | 28 | |
| GregCr | 0:9c0917bfde97 | 29 | typedef enum |
| GregCr | 0:9c0917bfde97 | 30 | { |
| GregCr | 0:9c0917bfde97 | 31 | GPGGA_NMEA_DOLLAR, |
| GregCr | 0:9c0917bfde97 | 32 | GPGGA_NMEA_G1, |
| GregCr | 0:9c0917bfde97 | 33 | GPGGA_NMEA_P, |
| GregCr | 0:9c0917bfde97 | 34 | GPGGA_NMEA_G2, |
| GregCr | 0:9c0917bfde97 | 35 | GPGGA_NMEA_G3, |
| GregCr | 0:9c0917bfde97 | 36 | GPGGA_NMEA_A, |
| GregCr | 0:9c0917bfde97 | 37 | GPGGA_NMEA_CR, |
| GregCr | 0:9c0917bfde97 | 38 | GPGGA_NMEA_LF |
| GregCr | 0:9c0917bfde97 | 39 | }GpggaNmeaFields_t; |
| GregCr | 0:9c0917bfde97 | 40 | |
| GregCr | 0:9c0917bfde97 | 41 | typedef enum |
| GregCr | 0:9c0917bfde97 | 42 | { |
| GregCr | 0:9c0917bfde97 | 43 | GPZDA_NMEA_DOLLAR, |
| GregCr | 0:9c0917bfde97 | 44 | GPZDA_NMEA_G1, |
| GregCr | 0:9c0917bfde97 | 45 | GPZDA_NMEA_P, |
| GregCr | 0:9c0917bfde97 | 46 | GPZDA_NMEA_G2, |
| GregCr | 0:9c0917bfde97 | 47 | GPZDA_NMEA_G3, |
| GregCr | 0:9c0917bfde97 | 48 | GPZDA_NMEA_A, |
| GregCr | 0:9c0917bfde97 | 49 | GPZDA_NMEA_CR, |
| GregCr | 0:9c0917bfde97 | 50 | GPZDA_NMEA_LF |
| GregCr | 0:9c0917bfde97 | 51 | }GpzdaNmeaFields_t; |
| GregCr | 0:9c0917bfde97 | 52 | |
| GregCr | 0:9c0917bfde97 | 53 | typedef enum |
| GregCr | 0:9c0917bfde97 | 54 | { |
| GregCr | 0:9c0917bfde97 | 55 | GPS_COMMS_INIT, |
| GregCr | 0:9c0917bfde97 | 56 | GPS_COMMS_WRITE_SETUP, |
| GregCr | 0:9c0917bfde97 | 57 | GPS_COMMS_WAIT_WRITE_SETUP, |
| GregCr | 0:9c0917bfde97 | 58 | GPS_COMMS_READ_DATA_BUFFER, |
| GregCr | 0:9c0917bfde97 | 59 | GPS_COMMS_WAIT_NEXT_READ |
| GregCr | 0:9c0917bfde97 | 60 | }GpsCommsState_t; |
| GregCr | 0:9c0917bfde97 | 61 | |
| GregCr | 0:9c0917bfde97 | 62 | union GpsBufferSize |
| GregCr | 0:9c0917bfde97 | 63 | { |
| GregCr | 0:9c0917bfde97 | 64 | uint16_t NumBytes; |
| GregCr | 0:9c0917bfde97 | 65 | char NumBytesBuffer[2]; |
| GregCr | 0:9c0917bfde97 | 66 | }; |
| GregCr | 0:9c0917bfde97 | 67 | |
| GregCr | 0:9c0917bfde97 | 68 | |
| GregCr | 0:9c0917bfde97 | 69 | //MAX7 initialisation commands |
| GregCr | 0:9c0917bfde97 | 70 | const char SetupArray[NUM_SETUP_COMMANDS][SETUP_COMMAND_LENGTH] = |
| GregCr | 0:9c0917bfde97 | 71 | { |
| GregCr | 0:9c0917bfde97 | 72 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29 }, // GxGGA on to I2C |
| GregCr | 0:9c0917bfde97 | 73 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x09, 0x62 }, // GxZDA on to I2C |
| GregCr | 0:9c0917bfde97 | 74 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x2B }, // GxGLL not on the I2C |
| GregCr | 0:9c0917bfde97 | 75 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x04, 0x40 }, // GxRMC not on the I2C |
| GregCr | 0:9c0917bfde97 | 76 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x05, 0x47 }, // GxVTG not on the I2C |
| GregCr | 0:9c0917bfde97 | 77 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x32 }, // GxGSA not on the I2C |
| GregCr | 0:9c0917bfde97 | 78 | { 0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0xF0, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x39 } // GxGSV not on the I2C |
| GregCr | 0:9c0917bfde97 | 79 | }; |
| GregCr | 0:9c0917bfde97 | 80 | |
| GregCr | 0:9c0917bfde97 | 81 | I2C GpsI2C( I2C_SDA, I2C_SCL ); |
| GregCr | 0:9c0917bfde97 | 82 | |
| GregCr | 0:9c0917bfde97 | 83 | GpsStruct Gps; |
| GregCr | 0:9c0917bfde97 | 84 | |
| GregCr | 0:9c0917bfde97 | 85 | static uint8_t GpggaSentenceBuffer[MAX_NMEA_SENTENCE_LENGTH]; |
| GregCr | 0:9c0917bfde97 | 86 | static int GpggaSentenceBufferPtr = 0; |
| GregCr | 0:9c0917bfde97 | 87 | static uint8_t GpzdaSentenceBuffer[MAX_NMEA_SENTENCE_LENGTH]; |
| GregCr | 0:9c0917bfde97 | 88 | static int GpzdaSentenceBufferPtr = 0; |
| GregCr | 0:9c0917bfde97 | 89 | |
| GregCr | 0:9c0917bfde97 | 90 | static GpggaNmeaFields_t GpggaNmeaField; |
| GregCr | 0:9c0917bfde97 | 91 | static GpzdaNmeaFields_t GpzdaNmeaField; |
| GregCr | 0:9c0917bfde97 | 92 | static GpsCommsState_t GpsCommsState; |
| GregCr | 0:9c0917bfde97 | 93 | static uint32_t GpsCommsTimer; |
| GregCr | 0:9c0917bfde97 | 94 | |
| GregCr | 0:9c0917bfde97 | 95 | |
| GregCr | 0:9c0917bfde97 | 96 | static void GpsCheckCommandBufferForGpgga( uint8_t thisChar ); |
| GregCr | 0:9c0917bfde97 | 97 | static void GpsCheckCommandBufferForGpzda( uint8_t thisChar ); |
| GregCr | 0:9c0917bfde97 | 98 | static void ParseNmeaGpggaSentence( void ); |
| GregCr | 0:9c0917bfde97 | 99 | static void ParseNmeaGpzdaSentence( void ); |
| GregCr | 0:9c0917bfde97 | 100 | static bool Max7GpsWriteSetupOK( void ); |
| GregCr | 0:9c0917bfde97 | 101 | static bool Max7GpsReadDataBuffer( void ); |
| GregCr | 0:9c0917bfde97 | 102 | static uint8_t Max7GpsReadRegister( char thisRegAddress ); |
| GregCr | 0:9c0917bfde97 | 103 | |
| GregCr | 0:9c0917bfde97 | 104 | |
| GregCr | 0:9c0917bfde97 | 105 | void Max7GpsInit( void ) |
| GregCr | 0:9c0917bfde97 | 106 | { |
| GregCr | 0:9c0917bfde97 | 107 | GpsI2C.frequency( I2C_FREQUENCY ); |
| GregCr | 0:9c0917bfde97 | 108 | } |
| GregCr | 0:9c0917bfde97 | 109 | |
| GregCr | 0:9c0917bfde97 | 110 | void Max7GpsHandle( void ) |
| GregCr | 0:9c0917bfde97 | 111 | { |
| GregCr | 0:9c0917bfde97 | 112 | switch( GpsCommsState ) |
| GregCr | 0:9c0917bfde97 | 113 | { |
| GregCr | 0:9c0917bfde97 | 114 | case GPS_COMMS_INIT: |
| GregCr | 0:9c0917bfde97 | 115 | GpsCommsState = GPS_COMMS_WRITE_SETUP; |
| GregCr | 0:9c0917bfde97 | 116 | break; |
| GregCr | 0:9c0917bfde97 | 117 | |
| GregCr | 0:9c0917bfde97 | 118 | case GPS_COMMS_WRITE_SETUP: |
| GregCr | 0:9c0917bfde97 | 119 | if( Max7GpsWriteSetupOK( ) ) |
| GregCr | 0:9c0917bfde97 | 120 | { |
| GregCr | 0:9c0917bfde97 | 121 | GpsCommsState = GPS_COMMS_READ_DATA_BUFFER; |
| GregCr | 0:9c0917bfde97 | 122 | } |
| GregCr | 0:9c0917bfde97 | 123 | else |
| GregCr | 0:9c0917bfde97 | 124 | { |
| GregCr | 0:9c0917bfde97 | 125 | TimersSetTimer( &GpsCommsTimer, 1 * TIM_SEC ); |
| GregCr | 0:9c0917bfde97 | 126 | GpsCommsState = GPS_COMMS_WAIT_WRITE_SETUP; |
| GregCr | 0:9c0917bfde97 | 127 | } |
| GregCr | 0:9c0917bfde97 | 128 | break; |
| GregCr | 0:9c0917bfde97 | 129 | |
| GregCr | 0:9c0917bfde97 | 130 | case GPS_COMMS_WAIT_WRITE_SETUP: |
| GregCr | 0:9c0917bfde97 | 131 | if( TimersTimerHasExpired( &GpsCommsTimer ) ) |
| GregCr | 0:9c0917bfde97 | 132 | { |
| GregCr | 0:9c0917bfde97 | 133 | GpsCommsState = GPS_COMMS_WRITE_SETUP; |
| GregCr | 0:9c0917bfde97 | 134 | } |
| GregCr | 0:9c0917bfde97 | 135 | break; |
| GregCr | 0:9c0917bfde97 | 136 | |
| GregCr | 0:9c0917bfde97 | 137 | case GPS_COMMS_READ_DATA_BUFFER: |
| GregCr | 0:9c0917bfde97 | 138 | Max7GpsReadDataBuffer( ); |
| GregCr | 0:9c0917bfde97 | 139 | TimersSetTimer( &GpsCommsTimer, 100 * TIM_MSEC ); |
| GregCr | 0:9c0917bfde97 | 140 | GpsCommsState = GPS_COMMS_WAIT_NEXT_READ; |
| GregCr | 0:9c0917bfde97 | 141 | break; |
| GregCr | 0:9c0917bfde97 | 142 | |
| GregCr | 0:9c0917bfde97 | 143 | case GPS_COMMS_WAIT_NEXT_READ: |
| GregCr | 0:9c0917bfde97 | 144 | if( TimersTimerHasExpired( &GpsCommsTimer ) ) |
| GregCr | 0:9c0917bfde97 | 145 | { |
| GregCr | 0:9c0917bfde97 | 146 | GpsCommsState = GPS_COMMS_READ_DATA_BUFFER; |
| GregCr | 0:9c0917bfde97 | 147 | } |
| GregCr | 0:9c0917bfde97 | 148 | break; |
| GregCr | 0:9c0917bfde97 | 149 | } |
| GregCr | 0:9c0917bfde97 | 150 | } |
| GregCr | 0:9c0917bfde97 | 151 | |
| GregCr | 0:9c0917bfde97 | 152 | static bool Max7GpsWriteSetupOK( void ) |
| GregCr | 0:9c0917bfde97 | 153 | { |
| GregCr | 0:9c0917bfde97 | 154 | int lineCount; |
| GregCr | 0:9c0917bfde97 | 155 | |
| GregCr | 0:9c0917bfde97 | 156 | for( lineCount = 0; lineCount < NUM_SETUP_COMMANDS; lineCount++ ) |
| GregCr | 0:9c0917bfde97 | 157 | { |
| GregCr | 0:9c0917bfde97 | 158 | if( GpsI2C.write( GPS_I2C_ADDR, &SetupArray[lineCount][0], \ |
| GregCr | 0:9c0917bfde97 | 159 | SETUP_COMMAND_LENGTH, 0 ) ) |
| GregCr | 0:9c0917bfde97 | 160 | { |
| GregCr | 0:9c0917bfde97 | 161 | return false; |
| GregCr | 0:9c0917bfde97 | 162 | } |
| GregCr | 0:9c0917bfde97 | 163 | } |
| GregCr | 0:9c0917bfde97 | 164 | return true; |
| GregCr | 0:9c0917bfde97 | 165 | } |
| GregCr | 0:9c0917bfde97 | 166 | |
| GregCr | 0:9c0917bfde97 | 167 | static bool Max7GpsReadDataBuffer( void ) |
| GregCr | 0:9c0917bfde97 | 168 | { |
| GregCr | 0:9c0917bfde97 | 169 | uint8_t incomingCheck; |
| GregCr | 0:9c0917bfde97 | 170 | bool contFlag = true; |
| GregCr | 0:9c0917bfde97 | 171 | |
| GregCr | 0:9c0917bfde97 | 172 | while( contFlag ) |
| GregCr | 0:9c0917bfde97 | 173 | { |
| GregCr | 0:9c0917bfde97 | 174 | incomingCheck = Max7GpsReadRegister( DATA_STREAM_ADDRESS ); |
| GregCr | 0:9c0917bfde97 | 175 | if( incomingCheck == 0xFF ) |
| GregCr | 0:9c0917bfde97 | 176 | { |
| GregCr | 0:9c0917bfde97 | 177 | contFlag = false; |
| GregCr | 0:9c0917bfde97 | 178 | } |
| GregCr | 0:9c0917bfde97 | 179 | else |
| GregCr | 0:9c0917bfde97 | 180 | { |
| GregCr | 0:9c0917bfde97 | 181 | GpsCheckCommandBufferForGpgga( incomingCheck ); |
| GregCr | 0:9c0917bfde97 | 182 | GpsCheckCommandBufferForGpzda( incomingCheck ); |
| GregCr | 0:9c0917bfde97 | 183 | } |
| GregCr | 0:9c0917bfde97 | 184 | } |
| GregCr | 0:9c0917bfde97 | 185 | return false; |
| GregCr | 0:9c0917bfde97 | 186 | } |
| GregCr | 0:9c0917bfde97 | 187 | |
| GregCr | 0:9c0917bfde97 | 188 | static uint8_t Max7GpsReadRegister( char thisRegAddress ) |
| GregCr | 0:9c0917bfde97 | 189 | { |
| GregCr | 0:9c0917bfde97 | 190 | char thisValue; |
| GregCr | 0:9c0917bfde97 | 191 | uint8_t retVal; |
| GregCr | 0:9c0917bfde97 | 192 | |
| GregCr | 0:9c0917bfde97 | 193 | thisValue = thisRegAddress; |
| GregCr | 0:9c0917bfde97 | 194 | GpsI2C.write( GPS_I2C_ADDR, &thisValue, 1, 0 ); |
| GregCr | 0:9c0917bfde97 | 195 | GpsI2C.read( GPS_I2C_ADDR, &thisValue, 1, 0 ); |
| GregCr | 0:9c0917bfde97 | 196 | retVal = ( uint8_t )thisValue; |
| GregCr | 0:9c0917bfde97 | 197 | return retVal; |
| GregCr | 0:9c0917bfde97 | 198 | } |
| GregCr | 0:9c0917bfde97 | 199 | |
| GregCr | 0:9c0917bfde97 | 200 | static void GpsCheckCommandBufferForGpgga( uint8_t thisChar ) |
| GregCr | 0:9c0917bfde97 | 201 | { |
| GregCr | 0:9c0917bfde97 | 202 | switch( GpggaNmeaField ) |
| GregCr | 0:9c0917bfde97 | 203 | { |
| GregCr | 0:9c0917bfde97 | 204 | default: |
| GregCr | 0:9c0917bfde97 | 205 | case GPGGA_NMEA_DOLLAR: |
| GregCr | 0:9c0917bfde97 | 206 | if( thisChar == '$' ) |
| GregCr | 0:9c0917bfde97 | 207 | { |
| GregCr | 0:9c0917bfde97 | 208 | GpggaSentenceBufferPtr = 0; |
| GregCr | 0:9c0917bfde97 | 209 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 210 | GpggaNmeaField = GPGGA_NMEA_G1; |
| GregCr | 0:9c0917bfde97 | 211 | } |
| GregCr | 0:9c0917bfde97 | 212 | break; |
| GregCr | 0:9c0917bfde97 | 213 | |
| GregCr | 0:9c0917bfde97 | 214 | case GPGGA_NMEA_G1: |
| GregCr | 0:9c0917bfde97 | 215 | if( thisChar == 'G' ) |
| GregCr | 0:9c0917bfde97 | 216 | { |
| GregCr | 0:9c0917bfde97 | 217 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 218 | GpggaNmeaField = GPGGA_NMEA_P; |
| GregCr | 0:9c0917bfde97 | 219 | } |
| GregCr | 0:9c0917bfde97 | 220 | else |
| GregCr | 0:9c0917bfde97 | 221 | { |
| GregCr | 0:9c0917bfde97 | 222 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 223 | } |
| GregCr | 0:9c0917bfde97 | 224 | break; |
| GregCr | 0:9c0917bfde97 | 225 | |
| GregCr | 0:9c0917bfde97 | 226 | case GPGGA_NMEA_P: |
| GregCr | 0:9c0917bfde97 | 227 | if( thisChar == 'P' ) |
| GregCr | 0:9c0917bfde97 | 228 | { |
| GregCr | 0:9c0917bfde97 | 229 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 230 | GpggaNmeaField = GPGGA_NMEA_G2; |
| GregCr | 0:9c0917bfde97 | 231 | } |
| GregCr | 0:9c0917bfde97 | 232 | else |
| GregCr | 0:9c0917bfde97 | 233 | { |
| GregCr | 0:9c0917bfde97 | 234 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 235 | } |
| GregCr | 0:9c0917bfde97 | 236 | break; |
| GregCr | 0:9c0917bfde97 | 237 | |
| GregCr | 0:9c0917bfde97 | 238 | case GPGGA_NMEA_G2: |
| GregCr | 0:9c0917bfde97 | 239 | if( thisChar == 'G' ) |
| GregCr | 0:9c0917bfde97 | 240 | { |
| GregCr | 0:9c0917bfde97 | 241 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 242 | GpggaNmeaField = GPGGA_NMEA_G3; |
| GregCr | 0:9c0917bfde97 | 243 | } |
| GregCr | 0:9c0917bfde97 | 244 | else |
| GregCr | 0:9c0917bfde97 | 245 | { |
| GregCr | 0:9c0917bfde97 | 246 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 247 | } |
| GregCr | 0:9c0917bfde97 | 248 | break; |
| GregCr | 0:9c0917bfde97 | 249 | |
| GregCr | 0:9c0917bfde97 | 250 | case GPGGA_NMEA_G3: |
| GregCr | 0:9c0917bfde97 | 251 | if( thisChar == 'G' ) |
| GregCr | 0:9c0917bfde97 | 252 | { |
| GregCr | 0:9c0917bfde97 | 253 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 254 | GpggaNmeaField = GPGGA_NMEA_A; |
| GregCr | 0:9c0917bfde97 | 255 | } |
| GregCr | 0:9c0917bfde97 | 256 | else |
| GregCr | 0:9c0917bfde97 | 257 | { |
| GregCr | 0:9c0917bfde97 | 258 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 259 | } |
| GregCr | 0:9c0917bfde97 | 260 | break; |
| GregCr | 0:9c0917bfde97 | 261 | |
| GregCr | 0:9c0917bfde97 | 262 | case GPGGA_NMEA_A: |
| GregCr | 0:9c0917bfde97 | 263 | if( thisChar == 'A' ) |
| GregCr | 0:9c0917bfde97 | 264 | { |
| GregCr | 0:9c0917bfde97 | 265 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 266 | GpggaNmeaField = GPGGA_NMEA_CR; |
| GregCr | 0:9c0917bfde97 | 267 | } |
| GregCr | 0:9c0917bfde97 | 268 | else |
| GregCr | 0:9c0917bfde97 | 269 | { |
| GregCr | 0:9c0917bfde97 | 270 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 271 | } |
| GregCr | 0:9c0917bfde97 | 272 | break; |
| GregCr | 0:9c0917bfde97 | 273 | |
| GregCr | 0:9c0917bfde97 | 274 | case GPGGA_NMEA_CR: |
| GregCr | 0:9c0917bfde97 | 275 | GpggaSentenceBuffer[GpggaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 276 | if( GpggaSentenceBufferPtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 277 | { |
| GregCr | 0:9c0917bfde97 | 278 | GpggaNmeaField = GPGGA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 279 | } |
| GregCr | 0:9c0917bfde97 | 280 | if( thisChar == 0x0A ) |
| GregCr | 0:9c0917bfde97 | 281 | { |
| GregCr | 0:9c0917bfde97 | 282 | ParseNmeaGpggaSentence( ); |
| GregCr | 0:9c0917bfde97 | 283 | } |
| GregCr | 0:9c0917bfde97 | 284 | break; |
| GregCr | 0:9c0917bfde97 | 285 | |
| GregCr | 0:9c0917bfde97 | 286 | case GPGGA_NMEA_LF: |
| GregCr | 0:9c0917bfde97 | 287 | break; |
| GregCr | 0:9c0917bfde97 | 288 | } |
| GregCr | 0:9c0917bfde97 | 289 | } |
| GregCr | 0:9c0917bfde97 | 290 | |
| GregCr | 0:9c0917bfde97 | 291 | static void GpsCheckCommandBufferForGpzda( uint8_t thisChar ) |
| GregCr | 0:9c0917bfde97 | 292 | { |
| GregCr | 0:9c0917bfde97 | 293 | switch( GpzdaNmeaField ) |
| GregCr | 0:9c0917bfde97 | 294 | { |
| GregCr | 0:9c0917bfde97 | 295 | default: |
| GregCr | 0:9c0917bfde97 | 296 | case GPZDA_NMEA_DOLLAR: |
| GregCr | 0:9c0917bfde97 | 297 | if( thisChar == '$' ) |
| GregCr | 0:9c0917bfde97 | 298 | { |
| GregCr | 0:9c0917bfde97 | 299 | GpzdaSentenceBufferPtr = 0; |
| GregCr | 0:9c0917bfde97 | 300 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 301 | GpzdaNmeaField = GPZDA_NMEA_G1; |
| GregCr | 0:9c0917bfde97 | 302 | } |
| GregCr | 0:9c0917bfde97 | 303 | break; |
| GregCr | 0:9c0917bfde97 | 304 | |
| GregCr | 0:9c0917bfde97 | 305 | case GPZDA_NMEA_G1: |
| GregCr | 0:9c0917bfde97 | 306 | if( thisChar == 'G' ) |
| GregCr | 0:9c0917bfde97 | 307 | { |
| GregCr | 0:9c0917bfde97 | 308 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 309 | GpzdaNmeaField = GPZDA_NMEA_P; |
| GregCr | 0:9c0917bfde97 | 310 | } |
| GregCr | 0:9c0917bfde97 | 311 | else |
| GregCr | 0:9c0917bfde97 | 312 | { |
| GregCr | 0:9c0917bfde97 | 313 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 314 | } |
| GregCr | 0:9c0917bfde97 | 315 | break; |
| GregCr | 0:9c0917bfde97 | 316 | |
| GregCr | 0:9c0917bfde97 | 317 | case GPZDA_NMEA_P: |
| GregCr | 0:9c0917bfde97 | 318 | if( thisChar == 'P' ) |
| GregCr | 0:9c0917bfde97 | 319 | { |
| GregCr | 0:9c0917bfde97 | 320 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 321 | GpzdaNmeaField = GPZDA_NMEA_G2; |
| GregCr | 0:9c0917bfde97 | 322 | } |
| GregCr | 0:9c0917bfde97 | 323 | else |
| GregCr | 0:9c0917bfde97 | 324 | { |
| GregCr | 0:9c0917bfde97 | 325 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 326 | } |
| GregCr | 0:9c0917bfde97 | 327 | break; |
| GregCr | 0:9c0917bfde97 | 328 | |
| GregCr | 0:9c0917bfde97 | 329 | case GPZDA_NMEA_G2: |
| GregCr | 0:9c0917bfde97 | 330 | if( thisChar == 'Z' ) |
| GregCr | 0:9c0917bfde97 | 331 | { |
| GregCr | 0:9c0917bfde97 | 332 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 333 | GpzdaNmeaField = GPZDA_NMEA_G3; |
| GregCr | 0:9c0917bfde97 | 334 | } |
| GregCr | 0:9c0917bfde97 | 335 | else |
| GregCr | 0:9c0917bfde97 | 336 | { |
| GregCr | 0:9c0917bfde97 | 337 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 338 | } |
| GregCr | 0:9c0917bfde97 | 339 | break; |
| GregCr | 0:9c0917bfde97 | 340 | |
| GregCr | 0:9c0917bfde97 | 341 | case GPZDA_NMEA_G3: |
| GregCr | 0:9c0917bfde97 | 342 | if( thisChar == 'D' ) |
| GregCr | 0:9c0917bfde97 | 343 | { |
| GregCr | 0:9c0917bfde97 | 344 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 345 | GpzdaNmeaField = GPZDA_NMEA_A; |
| GregCr | 0:9c0917bfde97 | 346 | } |
| GregCr | 0:9c0917bfde97 | 347 | else |
| GregCr | 0:9c0917bfde97 | 348 | { |
| GregCr | 0:9c0917bfde97 | 349 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 350 | } |
| GregCr | 0:9c0917bfde97 | 351 | break; |
| GregCr | 0:9c0917bfde97 | 352 | |
| GregCr | 0:9c0917bfde97 | 353 | case GPZDA_NMEA_A: |
| GregCr | 0:9c0917bfde97 | 354 | if( thisChar == 'A' ) |
| GregCr | 0:9c0917bfde97 | 355 | { |
| GregCr | 0:9c0917bfde97 | 356 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 357 | GpzdaNmeaField = GPZDA_NMEA_CR; |
| GregCr | 0:9c0917bfde97 | 358 | } |
| GregCr | 0:9c0917bfde97 | 359 | else |
| GregCr | 0:9c0917bfde97 | 360 | { |
| GregCr | 0:9c0917bfde97 | 361 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 362 | } |
| GregCr | 0:9c0917bfde97 | 363 | break; |
| GregCr | 0:9c0917bfde97 | 364 | |
| GregCr | 0:9c0917bfde97 | 365 | case GPZDA_NMEA_CR: |
| GregCr | 0:9c0917bfde97 | 366 | GpzdaSentenceBuffer[GpzdaSentenceBufferPtr++] = thisChar; |
| GregCr | 0:9c0917bfde97 | 367 | if( GpzdaSentenceBufferPtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 368 | { |
| GregCr | 0:9c0917bfde97 | 369 | GpzdaNmeaField = GPZDA_NMEA_DOLLAR; |
| GregCr | 0:9c0917bfde97 | 370 | } |
| GregCr | 0:9c0917bfde97 | 371 | if( thisChar == 0x0A ) |
| GregCr | 0:9c0917bfde97 | 372 | { |
| GregCr | 0:9c0917bfde97 | 373 | ParseNmeaGpzdaSentence( ); |
| GregCr | 0:9c0917bfde97 | 374 | } |
| GregCr | 0:9c0917bfde97 | 375 | break; |
| GregCr | 0:9c0917bfde97 | 376 | |
| GregCr | 0:9c0917bfde97 | 377 | case GPZDA_NMEA_LF: |
| GregCr | 0:9c0917bfde97 | 378 | break; |
| GregCr | 0:9c0917bfde97 | 379 | } |
| GregCr | 0:9c0917bfde97 | 380 | } |
| GregCr | 0:9c0917bfde97 | 381 | |
| GregCr | 0:9c0917bfde97 | 382 | static void ParseNmeaGpggaSentence( void ) |
| GregCr | 0:9c0917bfde97 | 383 | { |
| GregCr | 0:9c0917bfde97 | 384 | GpggaStruct thisFix; |
| GregCr | 0:9c0917bfde97 | 385 | int sentencePtr = 1; |
| GregCr | 0:9c0917bfde97 | 386 | int subStrPtr = 0; |
| GregCr | 0:9c0917bfde97 | 387 | int commaCount = 0; |
| GregCr | 0:9c0917bfde97 | 388 | uint8_t checkSum = 0; |
| GregCr | 0:9c0917bfde97 | 389 | uint8_t thisChar; |
| GregCr | 0:9c0917bfde97 | 390 | bool contFlag = true; |
| GregCr | 0:9c0917bfde97 | 391 | char tArray[3]; |
| GregCr | 0:9c0917bfde97 | 392 | char compArray[3]; |
| GregCr | 0:9c0917bfde97 | 393 | |
| GregCr | 0:9c0917bfde97 | 394 | while( contFlag ) //Get the checksum |
| GregCr | 0:9c0917bfde97 | 395 | { |
| GregCr | 0:9c0917bfde97 | 396 | thisChar = GpggaSentenceBuffer[sentencePtr]; |
| GregCr | 0:9c0917bfde97 | 397 | if( thisChar == '*' ) |
| GregCr | 0:9c0917bfde97 | 398 | { |
| GregCr | 0:9c0917bfde97 | 399 | contFlag = false; |
| GregCr | 0:9c0917bfde97 | 400 | } |
| GregCr | 0:9c0917bfde97 | 401 | else |
| GregCr | 0:9c0917bfde97 | 402 | { |
| GregCr | 0:9c0917bfde97 | 403 | checkSum ^= thisChar; |
| GregCr | 0:9c0917bfde97 | 404 | } |
| GregCr | 0:9c0917bfde97 | 405 | sentencePtr++; |
| GregCr | 0:9c0917bfde97 | 406 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 407 | { |
| GregCr | 0:9c0917bfde97 | 408 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 409 | return; |
| GregCr | 0:9c0917bfde97 | 410 | } |
| GregCr | 0:9c0917bfde97 | 411 | } |
| GregCr | 0:9c0917bfde97 | 412 | compArray[0] = GpggaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 413 | compArray[1] = GpggaSentenceBuffer[sentencePtr]; |
| GregCr | 0:9c0917bfde97 | 414 | compArray[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 415 | sentencePtr = 0; |
| GregCr | 0:9c0917bfde97 | 416 | sprintf( tArray, "%02X", checkSum ); |
| GregCr | 0:9c0917bfde97 | 417 | if( strcmp( tArray, compArray ) != 0 ) //Fails checksum |
| GregCr | 0:9c0917bfde97 | 418 | { |
| GregCr | 0:9c0917bfde97 | 419 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 420 | return; |
| GregCr | 0:9c0917bfde97 | 421 | } |
| GregCr | 0:9c0917bfde97 | 422 | while( commaCount < 6 ) //Find fix quality |
| GregCr | 0:9c0917bfde97 | 423 | { |
| GregCr | 0:9c0917bfde97 | 424 | if( GpggaSentenceBuffer[sentencePtr++] == ',' ) |
| GregCr | 0:9c0917bfde97 | 425 | { |
| GregCr | 0:9c0917bfde97 | 426 | commaCount++; |
| GregCr | 0:9c0917bfde97 | 427 | } |
| GregCr | 0:9c0917bfde97 | 428 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 429 | { |
| GregCr | 0:9c0917bfde97 | 430 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 431 | return; |
| GregCr | 0:9c0917bfde97 | 432 | } |
| GregCr | 0:9c0917bfde97 | 433 | } |
| GregCr | 0:9c0917bfde97 | 434 | switch( GpggaSentenceBuffer[sentencePtr++] ) |
| GregCr | 0:9c0917bfde97 | 435 | { |
| GregCr | 0:9c0917bfde97 | 436 | case '1': |
| GregCr | 0:9c0917bfde97 | 437 | case '2': |
| GregCr | 0:9c0917bfde97 | 438 | case '3': |
| GregCr | 0:9c0917bfde97 | 439 | case '4': |
| GregCr | 0:9c0917bfde97 | 440 | thisFix.Fixed = true; |
| GregCr | 0:9c0917bfde97 | 441 | break; |
| GregCr | 0:9c0917bfde97 | 442 | |
| GregCr | 0:9c0917bfde97 | 443 | default: |
| GregCr | 0:9c0917bfde97 | 444 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 445 | break; |
| GregCr | 0:9c0917bfde97 | 446 | } |
| GregCr | 0:9c0917bfde97 | 447 | sentencePtr++; //Skip comma after fix |
| GregCr | 0:9c0917bfde97 | 448 | thisFix.NumSats[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 449 | thisFix.NumSats[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 450 | thisFix.NumSats[subStrPtr] = 0; |
| GregCr | 0:9c0917bfde97 | 451 | if( thisFix.Fixed ) |
| GregCr | 0:9c0917bfde97 | 452 | { |
| GregCr | 0:9c0917bfde97 | 453 | sentencePtr = 0; |
| GregCr | 0:9c0917bfde97 | 454 | commaCount = 0; |
| GregCr | 0:9c0917bfde97 | 455 | while( commaCount < 1 ) //Find fix time |
| GregCr | 0:9c0917bfde97 | 456 | { |
| GregCr | 0:9c0917bfde97 | 457 | if( GpggaSentenceBuffer[sentencePtr++] == ',' ) |
| GregCr | 0:9c0917bfde97 | 458 | { |
| GregCr | 0:9c0917bfde97 | 459 | commaCount++; |
| GregCr | 0:9c0917bfde97 | 460 | } |
| GregCr | 0:9c0917bfde97 | 461 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 462 | { |
| GregCr | 0:9c0917bfde97 | 463 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 464 | return; |
| GregCr | 0:9c0917bfde97 | 465 | } |
| GregCr | 0:9c0917bfde97 | 466 | } |
| GregCr | 0:9c0917bfde97 | 467 | subStrPtr = 0; |
| GregCr | 0:9c0917bfde97 | 468 | // Skip over time field as this can be picked up from the other sentence |
| GregCr | 0:9c0917bfde97 | 469 | sentencePtr += 6; |
| GregCr | 0:9c0917bfde97 | 470 | while( commaCount < 2 ) //Find Latitude |
| GregCr | 0:9c0917bfde97 | 471 | { |
| GregCr | 0:9c0917bfde97 | 472 | if( GpzdaSentenceBuffer[sentencePtr++] == ',' ) |
| GregCr | 0:9c0917bfde97 | 473 | { |
| GregCr | 0:9c0917bfde97 | 474 | commaCount++; |
| GregCr | 0:9c0917bfde97 | 475 | } |
| GregCr | 0:9c0917bfde97 | 476 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 477 | { |
| GregCr | 0:9c0917bfde97 | 478 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 479 | return; |
| GregCr | 0:9c0917bfde97 | 480 | } |
| GregCr | 0:9c0917bfde97 | 481 | } |
| GregCr | 0:9c0917bfde97 | 482 | subStrPtr = 0; |
| GregCr | 0:9c0917bfde97 | 483 | for( commaCount = 0; commaCount < 10; commaCount++ ) |
| GregCr | 0:9c0917bfde97 | 484 | { |
| GregCr | 0:9c0917bfde97 | 485 | thisFix.Lat[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 486 | } |
| GregCr | 0:9c0917bfde97 | 487 | sentencePtr++; // Skip next comma |
| GregCr | 0:9c0917bfde97 | 488 | thisFix.Lat[subStrPtr++] = ' '; //Add a space |
| GregCr | 0:9c0917bfde97 | 489 | thisFix.Lat[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; //N or S |
| GregCr | 0:9c0917bfde97 | 490 | thisFix.Lat[subStrPtr] = 0x00; //String terminate |
| GregCr | 0:9c0917bfde97 | 491 | |
| GregCr | 0:9c0917bfde97 | 492 | while( commaCount < 4 ) //Find Longitude |
| GregCr | 0:9c0917bfde97 | 493 | { |
| GregCr | 0:9c0917bfde97 | 494 | if( GpggaSentenceBuffer[sentencePtr++] == ',' ) |
| GregCr | 0:9c0917bfde97 | 495 | { |
| GregCr | 0:9c0917bfde97 | 496 | commaCount++; |
| GregCr | 0:9c0917bfde97 | 497 | } |
| GregCr | 0:9c0917bfde97 | 498 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 499 | { |
| GregCr | 0:9c0917bfde97 | 500 | thisFix.Fixed = false; |
| GregCr | 0:9c0917bfde97 | 501 | return; |
| GregCr | 0:9c0917bfde97 | 502 | } |
| GregCr | 0:9c0917bfde97 | 503 | } |
| GregCr | 0:9c0917bfde97 | 504 | sentencePtr++; // Skip this comma |
| GregCr | 0:9c0917bfde97 | 505 | subStrPtr = 0; |
| GregCr | 0:9c0917bfde97 | 506 | for( commaCount = 0; commaCount < 11; commaCount++ ) |
| GregCr | 0:9c0917bfde97 | 507 | { |
| GregCr | 0:9c0917bfde97 | 508 | thisFix.Long[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 509 | } |
| GregCr | 0:9c0917bfde97 | 510 | sentencePtr++; // Skip next comma |
| GregCr | 0:9c0917bfde97 | 511 | thisFix.Long[subStrPtr++] = ' '; //Add a space |
| GregCr | 0:9c0917bfde97 | 512 | thisFix.Long[subStrPtr++] = GpggaSentenceBuffer[sentencePtr++]; //E or W |
| GregCr | 0:9c0917bfde97 | 513 | thisFix.Long[subStrPtr] = 0x00; //String terminate |
| GregCr | 0:9c0917bfde97 | 514 | } |
| GregCr | 0:9c0917bfde97 | 515 | thisFix.Updated = true; |
| GregCr | 0:9c0917bfde97 | 516 | Gps.Position = thisFix; |
| GregCr | 0:9c0917bfde97 | 517 | } |
| GregCr | 0:9c0917bfde97 | 518 | |
| GregCr | 0:9c0917bfde97 | 519 | static void ParseNmeaGpzdaSentence( void ) |
| GregCr | 0:9c0917bfde97 | 520 | { |
| GregCr | 0:9c0917bfde97 | 521 | GpzdaStruct thisTime; |
| GregCr | 0:9c0917bfde97 | 522 | int sentencePtr = 1; |
| GregCr | 0:9c0917bfde97 | 523 | int commaCount = 0; |
| GregCr | 0:9c0917bfde97 | 524 | uint8_t checkSum = 0; |
| GregCr | 0:9c0917bfde97 | 525 | uint8_t thisChar; |
| GregCr | 0:9c0917bfde97 | 526 | bool contFlag = true; |
| GregCr | 0:9c0917bfde97 | 527 | char tArray[3]; |
| GregCr | 0:9c0917bfde97 | 528 | char compArray[3]; |
| GregCr | 0:9c0917bfde97 | 529 | |
| GregCr | 0:9c0917bfde97 | 530 | while( contFlag ) //Get the checksum |
| GregCr | 0:9c0917bfde97 | 531 | { |
| GregCr | 0:9c0917bfde97 | 532 | thisChar = GpzdaSentenceBuffer[sentencePtr]; |
| GregCr | 0:9c0917bfde97 | 533 | if( thisChar == '*' ) |
| GregCr | 0:9c0917bfde97 | 534 | { |
| GregCr | 0:9c0917bfde97 | 535 | contFlag = false; |
| GregCr | 0:9c0917bfde97 | 536 | } |
| GregCr | 0:9c0917bfde97 | 537 | else |
| GregCr | 0:9c0917bfde97 | 538 | { |
| GregCr | 0:9c0917bfde97 | 539 | checkSum ^= thisChar; |
| GregCr | 0:9c0917bfde97 | 540 | } |
| GregCr | 0:9c0917bfde97 | 541 | sentencePtr++; |
| GregCr | 0:9c0917bfde97 | 542 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 543 | { |
| GregCr | 0:9c0917bfde97 | 544 | return; |
| GregCr | 0:9c0917bfde97 | 545 | } |
| GregCr | 0:9c0917bfde97 | 546 | } |
| GregCr | 0:9c0917bfde97 | 547 | compArray[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 548 | compArray[1] = GpzdaSentenceBuffer[sentencePtr]; |
| GregCr | 0:9c0917bfde97 | 549 | compArray[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 550 | sentencePtr = 0; |
| GregCr | 0:9c0917bfde97 | 551 | sprintf( tArray, "%02X", checkSum ); |
| GregCr | 0:9c0917bfde97 | 552 | if( strcmp( tArray, compArray ) != 0 ) //Fails checksum |
| GregCr | 0:9c0917bfde97 | 553 | { |
| GregCr | 0:9c0917bfde97 | 554 | return; |
| GregCr | 0:9c0917bfde97 | 555 | } |
| GregCr | 0:9c0917bfde97 | 556 | while( commaCount < 1 ) //Start with hours (first field) |
| GregCr | 0:9c0917bfde97 | 557 | { |
| GregCr | 0:9c0917bfde97 | 558 | if( GpzdaSentenceBuffer[sentencePtr++] == ',' ) |
| GregCr | 0:9c0917bfde97 | 559 | { |
| GregCr | 0:9c0917bfde97 | 560 | commaCount++; |
| GregCr | 0:9c0917bfde97 | 561 | } |
| GregCr | 0:9c0917bfde97 | 562 | if( sentencePtr >= MAX_NMEA_SENTENCE_LENGTH ) |
| GregCr | 0:9c0917bfde97 | 563 | { |
| GregCr | 0:9c0917bfde97 | 564 | return; |
| GregCr | 0:9c0917bfde97 | 565 | } |
| GregCr | 0:9c0917bfde97 | 566 | } |
| GregCr | 0:9c0917bfde97 | 567 | thisTime.Hour[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 568 | thisTime.Hour[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 569 | thisTime.Hour[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 570 | |
| GregCr | 0:9c0917bfde97 | 571 | thisTime.Minute[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 572 | thisTime.Minute[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 573 | thisTime.Minute[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 574 | |
| GregCr | 0:9c0917bfde97 | 575 | thisTime.Second[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 576 | thisTime.Second[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 577 | thisTime.Second[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 578 | sentencePtr += 4; |
| GregCr | 0:9c0917bfde97 | 579 | |
| GregCr | 0:9c0917bfde97 | 580 | thisTime.Day[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 581 | thisTime.Day[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 582 | thisTime.Day[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 583 | sentencePtr += 1; |
| GregCr | 0:9c0917bfde97 | 584 | |
| GregCr | 0:9c0917bfde97 | 585 | thisTime.Month[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 586 | thisTime.Month[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 587 | thisTime.Month[2] = 0x00; |
| GregCr | 0:9c0917bfde97 | 588 | sentencePtr += 1; |
| GregCr | 0:9c0917bfde97 | 589 | |
| GregCr | 0:9c0917bfde97 | 590 | thisTime.Year[0] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 591 | thisTime.Year[1] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 592 | thisTime.Year[2] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 593 | thisTime.Year[3] = GpzdaSentenceBuffer[sentencePtr++]; |
| GregCr | 0:9c0917bfde97 | 594 | thisTime.Year[4] = 0x00; |
| GregCr | 0:9c0917bfde97 | 595 | thisTime.Updated = true; |
| GregCr | 0:9c0917bfde97 | 596 | Gps.Time = thisTime; |
| GregCr | 0:9c0917bfde97 | 597 | } |
| GregCr | 0:9c0917bfde97 | 598 | |
| GregCr | 0:9c0917bfde97 | 599 | GpsStruct* Max7GpsgetData( void ) |
| GregCr | 0:9c0917bfde97 | 600 | { |
| GregCr | 0:9c0917bfde97 | 601 | return &Gps ; |
| GregCr | 0:9c0917bfde97 | 602 | } |