Surasak Nasuriwong / GPSGms6

GPS GMS-6 Module

Dependents:   RwSDCard_Xml_GPS

GPSGms6.cpp@10:1311a69b0857, 2017-03-01 (annotated)

Committer:
Lucyjungz
Date:
Wed Mar 01 02:20:11 2017 +0000
Revision:
10:1311a69b0857
Parent:
9:12519423b85f 
typo baudrate

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Lucyjungz 7:333d46845050 1 /**
Lucyjungz 7:333d46845050 2 ******************************************************************************
Lucyjungz 7:333d46845050 3 * @file GPSGms6.cpp
Lucyjungz 7:333d46845050 4 * @author Narut T
Lucyjungz 7:333d46845050 5 * @version V1
Lucyjungz 7:333d46845050 6 * @date 19/05/2016
Lucyjungz 7:333d46845050 7 * @brief Library for GPS GMS6
Lucyjungz 7:333d46845050 8 ******************************************************************************/
Lucyjungz 7:333d46845050 9
nsrwsurasak 0:7ef27b349b37 10 #include "mbed.h"
nsrwsurasak 0:7ef27b349b37 11 #include "GPSGms6.h"
nsrwsurasak 0:7ef27b349b37 12 #include <string>
nsrwsurasak 0:7ef27b349b37 13
Lucyjungz 1:dceb4eaf697e 14
Lucyjungz 1:dceb4eaf697e 15 /* ############### Method Defination ################## */
nsrwsurasak 0:7ef27b349b37 16 #define GET_GPRMC_SECTION_SIZE(state) (unsigned int)gprms_tbl[state].size
nsrwsurasak 0:7ef27b349b37 17 #define GET_GPRMC_VARIABLE_ADDR(state) gprms_tbl[state].p_val
nsrwsurasak 0:7ef27b349b37 18 #define GET_GPRMC_NEXT_STATE(state) (GPS_ProcessState)gprms_tbl[state+1].state
nsrwsurasak 0:7ef27b349b37 19
nsrwsurasak 0:7ef27b349b37 20
Lucyjungz 1:dceb4eaf697e 21 GPRMC_Data_TypeDef m_gprmc; // Latest GPRMC data
Lucyjungz 1:dceb4eaf697e 22 GPRMC_Data_TypeDef m_valid_gprmc; // Latest valid GPRMC Data
Lucyjungz 1:dceb4eaf697e 23 char m_RxBuf[RX_BUF_SIZE]; // Reading Buffer
Lucyjungz 1:dceb4eaf697e 24 bool m_available; // Flag to indicate availability of GPRMC data
Lucyjungz 1:dceb4eaf697e 25 int m_index; // an index
Lucyjungz 1:dceb4eaf697e 26
Lucyjungz 1:dceb4eaf697e 27 /**
Lucyjungz 1:dceb4eaf697e 28 * Initializaion of the GPS Module by using serial and selected PIN
Lucyjungz 1:dceb4eaf697e 29 */
nsrwsurasak 0:7ef27b349b37 30 Serial serial_gps(PA_9, PA_10);
Lucyjungz 1:dceb4eaf697e 31
Lucyjungz 1:dceb4eaf697e 32 /**
Lucyjungz 1:dceb4eaf697e 33 * Table for GPRMC structure that use for decoding GPRMC message of the GPS
Lucyjungz 1:dceb4eaf697e 34 * This table contain 3 element which are index, section size and pointer to variable
Lucyjungz 1:dceb4eaf697e 35 * Once GPS process routine is called data will be populated in variable that define in third column
Lucyjungz 1:dceb4eaf697e 36 */
Lucyjungz 7:333d46845050 37 const GPRMC_Tbl_TypeDef gprms_tbl[] = {
Lucyjungz 1:dceb4eaf697e 38 // index , section size , variable
nsrwsurasak 0:7ef27b349b37 39 {GPS_Process_Start , INVALID_VALUE ,(char *)INVALID_VALUE},
nsrwsurasak 0:7ef27b349b37 40 {GPS_Process_Header , HEADER_SIZE , m_gprmc.header},
nsrwsurasak 0:7ef27b349b37 41 {GPS_Process_Time , GPRMC_TIME_SIZE , m_gprmc.time},
nsrwsurasak 0:7ef27b349b37 42 {GPS_Process_Status , GPRMC_STATUS_SIZE , m_gprmc.status},
nsrwsurasak 0:7ef27b349b37 43 {GPS_Process_Latitude , GPRMC_LATITUDE_SIZE , m_gprmc.latitude},
nsrwsurasak 0:7ef27b349b37 44 {GPS_Process_Latitude_hemis , GPRMC_LATITUDE_HEMI_SIZE , m_gprmc.latitude_hemi},
nsrwsurasak 0:7ef27b349b37 45 {GPS_Process_Longitude , GPRMC_LONGITUDE_SIZE , m_gprmc.longitude},
nsrwsurasak 0:7ef27b349b37 46 {GPS_Process_Longitude_hemis , GPRMC_LONGITUDE_HEMI_SIZE , m_gprmc.longitude_hemi},
nsrwsurasak 0:7ef27b349b37 47 {GPS_Process_Speed , GPRMC_SPEED_SIZE , m_gprmc.speed},
nsrwsurasak 0:7ef27b349b37 48 {GPS_Process_Course , GPRMC_COURSE_SIZE , m_gprmc.course},
nsrwsurasak 0:7ef27b349b37 49 {GPS_Process_Date , GPRMC_DATE_SIZE , m_gprmc.date},
nsrwsurasak 0:7ef27b349b37 50 {GPS_Process_Magnetic , GPRMC_MAGNETIC_SIZE , m_gprmc.magnetic},
nsrwsurasak 0:7ef27b349b37 51 {GPS_Process_Magnetic_Dir , GPRMC_MAGNETIC_DIR_SIZE , m_gprmc.magnetic_dir},
nsrwsurasak 0:7ef27b349b37 52 {GPS_Process_Indicator , GPRMC_INDICATOR_SIZE , m_gprmc.indicator},
nsrwsurasak 0:7ef27b349b37 53 {GPS_Process_Complete ,INVALID_VALUE ,(char *)INVALID_VALUE}
nsrwsurasak 0:7ef27b349b37 54
nsrwsurasak 0:7ef27b349b37 55 };
Lucyjungz 1:dceb4eaf697e 56
Lucyjungz 7:333d46845050 57 /* Private function prototypes -----------------------------------------------*/
Lucyjungz 7:333d46845050 58 static void GPSGMS6_CompleteCallback();
Lucyjungz 7:333d46845050 59 static GPS_ProcessStatus GPSGMS6_ProcessGprmcSection(GPS_ProcessState state,char * buf , unsigned int buf_index,unsigned int buf_size, unsigned int section_size, char * ret_value);
Lucyjungz 7:333d46845050 60 static void GPSGMS6_ByteCallback();
Lucyjungz 7:333d46845050 61 static void GPSGMS6_ProcessGpsData(char * buf, unsigned int size);
Lucyjungz 7:333d46845050 62
Lucyjungz 7:333d46845050 63
Lucyjungz 1:dceb4eaf697e 64 /**
Lucyjungz 1:dceb4eaf697e 65 * @brief Utility for processing GPRMC message from the GPS
Lucyjungz 1:dceb4eaf697e 66 * @note
Lucyjungz 1:dceb4eaf697e 67 * @param state : current state that program is processing
Lucyjungz 1:dceb4eaf697e 68 * @param buf : pointer to buffer that supposed to have GPS message
Lucyjungz 1:dceb4eaf697e 69 * @param buf index : index to the current offset of the buffer
Lucyjungz 1:dceb4eaf697e 70 * @param buf size : size of the buffer
Lucyjungz 1:dceb4eaf697e 71 * @param section size : size of the processing section
Lucyjungz 1:dceb4eaf697e 72 * @retval pointer of return value
Lucyjungz 1:dceb4eaf697e 73 */
Lucyjungz 7:333d46845050 74 static GPS_ProcessStatus GPSGMS6_ProcessGprmcSection(GPS_ProcessState state,char * buf , unsigned int buf_index,unsigned int buf_size, unsigned int section_size, char * ret_value)
nsrwsurasak 0:7ef27b349b37 75 {
Lucyjungz 1:dceb4eaf697e 76 /* Initialize status */
nsrwsurasak 0:7ef27b349b37 77 GPS_ProcessStatus status = GPS_Status_Valid;
Lucyjungz 1:dceb4eaf697e 78 if (buf_index >= (buf_size - section_size))
Lucyjungz 1:dceb4eaf697e 79 {
Lucyjungz 1:dceb4eaf697e 80 /* Data not Enough to process */
nsrwsurasak 0:7ef27b349b37 81 status = GPS_Status_NotEnough;
Lucyjungz 1:dceb4eaf697e 82 }
Lucyjungz 5:9dd9ab613497 83 else if (buf[buf_index] == GPS_DELIMITER)
Lucyjungz 1:dceb4eaf697e 84 {
Lucyjungz 1:dceb4eaf697e 85 /* Empty Data */
nsrwsurasak 0:7ef27b349b37 86 status = GPS_Status_Empty;
Lucyjungz 5:9dd9ab613497 87 memset(ret_value,GPS_DEFAULT_DATA_VALUE, section_size);
Lucyjungz 1:dceb4eaf697e 88 }
Lucyjungz 1:dceb4eaf697e 89 else
Lucyjungz 1:dceb4eaf697e 90 {
Lucyjungz 1:dceb4eaf697e 91 /* Populate the data */
nsrwsurasak 0:7ef27b349b37 92 unsigned int idx;
nsrwsurasak 0:7ef27b349b37 93 for(idx = 0; idx < section_size; idx++) {
nsrwsurasak 0:7ef27b349b37 94 ret_value[idx] = buf[buf_index + idx];
nsrwsurasak 0:7ef27b349b37 95 }
nsrwsurasak 0:7ef27b349b37 96
nsrwsurasak 0:7ef27b349b37 97 }
Lucyjungz 1:dceb4eaf697e 98
Lucyjungz 1:dceb4eaf697e 99 /* Return status */
nsrwsurasak 0:7ef27b349b37 100 return status;
nsrwsurasak 0:7ef27b349b37 101
nsrwsurasak 0:7ef27b349b37 102 }
Lucyjungz 1:dceb4eaf697e 103 /**
Lucyjungz 1:dceb4eaf697e 104 * @brief Utility for processing GPS data
Lucyjungz 1:dceb4eaf697e 105 * @note this rely on gprmc table
Lucyjungz 1:dceb4eaf697e 106 * @param buf : pointer to buffer that supposed to have GPS message
Lucyjungz 1:dceb4eaf697e 107 * @param buf size : size of the buffer
Lucyjungz 1:dceb4eaf697e 108 * @retval variable that define in the table will be populated the data
Lucyjungz 1:dceb4eaf697e 109 */
Lucyjungz 7:333d46845050 110 static void GPSGMS6_ProcessGpsData(char * buf, unsigned int size)
nsrwsurasak 0:7ef27b349b37 111 {
nsrwsurasak 0:7ef27b349b37 112 unsigned int index;
nsrwsurasak 0:7ef27b349b37 113 unsigned int adv_index = 0;
Lucyjungz 1:dceb4eaf697e 114
Lucyjungz 1:dceb4eaf697e 115 /* Initialize status and state */
nsrwsurasak 0:7ef27b349b37 116 GPS_ProcessStatus status = GPS_Status_Valid;
nsrwsurasak 0:7ef27b349b37 117 GPS_ProcessState state = GPS_Process_Start;
Lucyjungz 1:dceb4eaf697e 118
Lucyjungz 1:dceb4eaf697e 119 /* Walk through the buffer */
Lucyjungz 1:dceb4eaf697e 120 for(index = 0; index < size; index++)
Lucyjungz 1:dceb4eaf697e 121 {
Lucyjungz 1:dceb4eaf697e 122 /* Start the process */
Lucyjungz 1:dceb4eaf697e 123 if (state == GPS_Process_Start)
Lucyjungz 1:dceb4eaf697e 124 {
Lucyjungz 1:dceb4eaf697e 125 /* Process the message */
Lucyjungz 5:9dd9ab613497 126 if (buf[index] == GPS_MESSAGE_HEADER_PREFIX)
Lucyjungz 1:dceb4eaf697e 127 {
Lucyjungz 1:dceb4eaf697e 128 /* Found header */
nsrwsurasak 0:7ef27b349b37 129 state = GPS_Process_Header;
Lucyjungz 1:dceb4eaf697e 130 }
Lucyjungz 1:dceb4eaf697e 131 else
Lucyjungz 1:dceb4eaf697e 132 {
Lucyjungz 1:dceb4eaf697e 133 /* Continue searching */
nsrwsurasak 0:7ef27b349b37 134 continue;
nsrwsurasak 0:7ef27b349b37 135 }
Lucyjungz 1:dceb4eaf697e 136 }
Lucyjungz 1:dceb4eaf697e 137 else if (state == GPS_Process_Header)
Lucyjungz 1:dceb4eaf697e 138 {
Lucyjungz 1:dceb4eaf697e 139 /* Process Header */
Lucyjungz 1:dceb4eaf697e 140 if (index < (size - HEADER_SIZE))
Lucyjungz 1:dceb4eaf697e 141 {
Lucyjungz 1:dceb4eaf697e 142 /* Check for GPRMC */
Lucyjungz 4:fb1cd9893eb8 143 if (IS_HEADER_GPRPC(buf))
Lucyjungz 4:fb1cd9893eb8 144 {
Lucyjungz 1:dceb4eaf697e 145
Lucyjungz 1:dceb4eaf697e 146 /* Populate the header to the variable */
nsrwsurasak 0:7ef27b349b37 147 unsigned int h_index;
Lucyjungz 4:fb1cd9893eb8 148 for(h_index = 0; h_index < HEADER_SIZE; h_index++)
Lucyjungz 4:fb1cd9893eb8 149 {
nsrwsurasak 0:7ef27b349b37 150 m_gprmc.header[h_index] = buf[index + h_index];
nsrwsurasak 0:7ef27b349b37 151 }
Lucyjungz 1:dceb4eaf697e 152
Lucyjungz 1:dceb4eaf697e 153 /* Move to the next section */
nsrwsurasak 0:7ef27b349b37 154 index += HEADER_SIZE;
nsrwsurasak 0:7ef27b349b37 155 state = GPS_Process_Time;
nsrwsurasak 0:7ef27b349b37 156 }
Lucyjungz 1:dceb4eaf697e 157 }
Lucyjungz 1:dceb4eaf697e 158 else
Lucyjungz 1:dceb4eaf697e 159 {
nsrwsurasak 0:7ef27b349b37 160 break;
nsrwsurasak 0:7ef27b349b37 161 }
nsrwsurasak 0:7ef27b349b37 162
Lucyjungz 1:dceb4eaf697e 163 }
Lucyjungz 1:dceb4eaf697e 164 else
Lucyjungz 1:dceb4eaf697e 165 {
Lucyjungz 1:dceb4eaf697e 166 /* Process GRPMC section */
Lucyjungz 7:333d46845050 167 status = GPSGMS6_ProcessGprmcSection(state, buf ,index, size, GET_GPRMC_SECTION_SIZE(state), GET_GPRMC_VARIABLE_ADDR(state));
Lucyjungz 1:dceb4eaf697e 168
Lucyjungz 1:dceb4eaf697e 169 /* Move to the next section */
nsrwsurasak 0:7ef27b349b37 170 adv_index = GET_GPRMC_SECTION_SIZE(state);
nsrwsurasak 0:7ef27b349b37 171 state = GET_GPRMC_NEXT_STATE(state) ;
nsrwsurasak 0:7ef27b349b37 172 }
nsrwsurasak 0:7ef27b349b37 173
nsrwsurasak 0:7ef27b349b37 174
Lucyjungz 1:dceb4eaf697e 175 if (status == GPS_Status_NotEnough || state == GPS_Process_Complete)
Lucyjungz 1:dceb4eaf697e 176 {
Lucyjungz 1:dceb4eaf697e 177 /* In case of status not normal, then done */
nsrwsurasak 0:7ef27b349b37 178 break;
Lucyjungz 1:dceb4eaf697e 179 }
Lucyjungz 1:dceb4eaf697e 180 else if (status == GPS_Status_Valid)
Lucyjungz 1:dceb4eaf697e 181 {
Lucyjungz 1:dceb4eaf697e 182 /* Status is valid, move on */
nsrwsurasak 0:7ef27b349b37 183 index += adv_index;
nsrwsurasak 0:7ef27b349b37 184 }
nsrwsurasak 0:7ef27b349b37 185 }
nsrwsurasak 0:7ef27b349b37 186
Lucyjungz 1:dceb4eaf697e 187 /* Check validity of the data */
Lucyjungz 4:fb1cd9893eb8 188 if (IS_INDICATOR_VALID(m_gprmc.indicator[0]))
Lucyjungz 1:dceb4eaf697e 189 {
Lucyjungz 1:dceb4eaf697e 190 /* If valid, populate to the valid variable */
nsrwsurasak 0:7ef27b349b37 191 m_available= true;
nsrwsurasak 0:7ef27b349b37 192 memcpy(&m_valid_gprmc, &m_gprmc , sizeof(m_gprmc));
nsrwsurasak 0:7ef27b349b37 193 }
nsrwsurasak 0:7ef27b349b37 194 }
nsrwsurasak 0:7ef27b349b37 195
Lucyjungz 1:dceb4eaf697e 196 /**
Lucyjungz 1:dceb4eaf697e 197 * @brief Callback function that process when the message is completed
Lucyjungz 1:dceb4eaf697e 198 * @note Rx Serial Interrupt must be properly started
Lucyjungz 1:dceb4eaf697e 199 * @retval
Lucyjungz 1:dceb4eaf697e 200 */
Lucyjungz 7:333d46845050 201 static void GPSGMS6_CompleteCallback()
nsrwsurasak 0:7ef27b349b37 202 {
Lucyjungz 1:dceb4eaf697e 203 /* Process GPS Data once message is completed read */
Lucyjungz 7:333d46845050 204 GPSGMS6_ProcessGpsData(m_RxBuf, RX_BUF_SIZE);
nsrwsurasak 0:7ef27b349b37 205 }
Lucyjungz 1:dceb4eaf697e 206 /**
Lucyjungz 1:dceb4eaf697e 207 * @brief Callback function that process when a charector is transfered
Lucyjungz 1:dceb4eaf697e 208 * @note Rx Serial Interrupt must be properly started
Lucyjungz 1:dceb4eaf697e 209 * @retval
Lucyjungz 1:dceb4eaf697e 210 */
Lucyjungz 7:333d46845050 211 static void GPSGMS6_ByteCallback()
nsrwsurasak 0:7ef27b349b37 212 {
Lucyjungz 1:dceb4eaf697e 213 /* Note: you need to actually read from the serial to clear the RX interrupt */
nsrwsurasak 0:7ef27b349b37 214 m_RxBuf[m_index] = serial_gps.getc();
nsrwsurasak 0:7ef27b349b37 215 m_index++;
Lucyjungz 1:dceb4eaf697e 216 if (m_index == RX_BUF_SIZE)
Lucyjungz 1:dceb4eaf697e 217 {
Lucyjungz 1:dceb4eaf697e 218 /* Buffer is full, call complete callback */
nsrwsurasak 0:7ef27b349b37 219 m_index = 0;
Lucyjungz 7:333d46845050 220 GPSGMS6_CompleteCallback();
nsrwsurasak 0:7ef27b349b37 221 }
nsrwsurasak 0:7ef27b349b37 222 }
Lucyjungz 1:dceb4eaf697e 223
Lucyjungz 1:dceb4eaf697e 224
Lucyjungz 1:dceb4eaf697e 225 /**
Lucyjungz 1:dceb4eaf697e 226 * @brief Constructor for GPS module
Lucyjungz 1:dceb4eaf697e 227 * @note
Lucyjungz 1:dceb4eaf697e 228 * @retval
Lucyjungz 1:dceb4eaf697e 229 */
nsrwsurasak 0:7ef27b349b37 230 GPSGms6::GPSGms6()
nsrwsurasak 0:7ef27b349b37 231 {
nsrwsurasak 0:7ef27b349b37 232
nsrwsurasak 0:7ef27b349b37 233 m_index = 0;
nsrwsurasak 0:7ef27b349b37 234 m_available = false;
nsrwsurasak 0:7ef27b349b37 235
Lucyjungz 10:1311a69b0857 236 #if EABLE_GPS_BAUDRATE
Lucyjungz 1:dceb4eaf697e 237 /* Talking on 9600 bps */
Lucyjungz 4:fb1cd9893eb8 238 serial_gps.baud(GPS_BAUD_RATE);
Lucyjungz 9:12519423b85f 239 #endif
nsrwsurasak 0:7ef27b349b37 240
nsrwsurasak 0:7ef27b349b37 241 }
Lucyjungz 1:dceb4eaf697e 242
Lucyjungz 1:dceb4eaf697e 243 /**
Lucyjungz 1:dceb4eaf697e 244 * @brief Function to start GPS Module
Lucyjungz 1:dceb4eaf697e 245 * @note after started, interrupt will always be active
Lucyjungz 1:dceb4eaf697e 246 * @retval
Lucyjungz 1:dceb4eaf697e 247 */
nsrwsurasak 0:7ef27b349b37 248 void GPSGms6::start_GPS()
nsrwsurasak 0:7ef27b349b37 249 {
Lucyjungz 1:dceb4eaf697e 250 /* Start Rx interrupt */
Lucyjungz 7:333d46845050 251 serial_gps.attach(&GPSGMS6_ByteCallback);
nsrwsurasak 0:7ef27b349b37 252 }
Lucyjungz 1:dceb4eaf697e 253
Lucyjungz 1:dceb4eaf697e 254 /**
Lucyjungz 1:dceb4eaf697e 255 * @brief Function to get latest GPRMC data
Lucyjungz 1:dceb4eaf697e 256 * @note
Lucyjungz 1:dceb4eaf697e 257 * @retval latest GPRMC data
Lucyjungz 1:dceb4eaf697e 258 */
Lucyjungz 7:333d46845050 259 GPRMC_Data_TypeDef * GPSGms6::latestGPRMC()
nsrwsurasak 0:7ef27b349b37 260 {
Lucyjungz 7:333d46845050 261 return (&m_gprmc);
nsrwsurasak 0:7ef27b349b37 262 }
Lucyjungz 1:dceb4eaf697e 263 /**
Lucyjungz 1:dceb4eaf697e 264 * @brief Function to get latest and valid GPRMC
Lucyjungz 1:dceb4eaf697e 265 * @note
Lucyjungz 1:dceb4eaf697e 266 * @retval valid GPRMC data
Lucyjungz 1:dceb4eaf697e 267 */
Lucyjungz 7:333d46845050 268 GPRMC_Data_TypeDef * GPSGms6::validGPRMC()
nsrwsurasak 0:7ef27b349b37 269 {
nsrwsurasak 0:7ef27b349b37 270 m_available = false;
Lucyjungz 7:333d46845050 271 return (&m_valid_gprmc);
nsrwsurasak 0:7ef27b349b37 272 }
Lucyjungz 1:dceb4eaf697e 273
Lucyjungz 1:dceb4eaf697e 274 /**
Lucyjungz 1:dceb4eaf697e 275 * @brief Function to get available flag of the valid GPRMC data
Lucyjungz 1:dceb4eaf697e 276 * @note
Lucyjungz 1:dceb4eaf697e 277 * @retval latest GPRMC data
Lucyjungz 1:dceb4eaf697e 278 */
nsrwsurasak 0:7ef27b349b37 279 bool GPSGms6::available()
nsrwsurasak 0:7ef27b349b37 280 {
nsrwsurasak 0:7ef27b349b37 281 return (m_available);
nsrwsurasak 0:7ef27b349b37 282 }
Lucyjungz 1:dceb4eaf697e 283 /**
Lucyjungz 1:dceb4eaf697e 284 * @brief Function to get UTC time
Lucyjungz 1:dceb4eaf697e 285 * @note
Lucyjungz 1:dceb4eaf697e 286 * @retval UTC time tn fm struct format
Lucyjungz 1:dceb4eaf697e 287 */
nsrwsurasak 0:7ef27b349b37 288 tm GPSGms6::UTCTime()
nsrwsurasak 0:7ef27b349b37 289 {
nsrwsurasak 0:7ef27b349b37 290 struct tm t;
Lucyjungz 1:dceb4eaf697e 291
Lucyjungz 1:dceb4eaf697e 292 /* Check available of date and time */
Lucyjungz 4:fb1cd9893eb8 293 if (m_gprmc.date[GPS_TIME_DATE_OFFSET] != ' ' && m_gprmc.time[GPS_TIME_HOUR_OFFSET] != ' ' )
nsrwsurasak 0:7ef27b349b37 294 {
Lucyjungz 1:dceb4eaf697e 295
Lucyjungz 1:dceb4eaf697e 296 /* Allocate buffer for buffering */
Lucyjungz 4:fb1cd9893eb8 297 char str[GPS_STRING_BUFFER_SIZE];
nsrwsurasak 0:7ef27b349b37 298
Lucyjungz 1:dceb4eaf697e 299 /* populate the second */
Lucyjungz 4:fb1cd9893eb8 300 memcpy( str, &m_gprmc.time[GPS_TIME_SECOND_OFFSET], GPS_TIME_SECOND_SIZE );
nsrwsurasak 0:7ef27b349b37 301 t.tm_sec = atoi(str);
Lucyjungz 1:dceb4eaf697e 302
Lucyjungz 1:dceb4eaf697e 303 /* populate the minute */
Lucyjungz 4:fb1cd9893eb8 304 memcpy( str, &m_gprmc.time[GPS_TIME_MINUTE_OFFSET], GPS_TIME_MINUTE_SIZE );
nsrwsurasak 0:7ef27b349b37 305 t.tm_min = atoi(str);
Lucyjungz 1:dceb4eaf697e 306
Lucyjungz 1:dceb4eaf697e 307 /* populate the hour */
Lucyjungz 4:fb1cd9893eb8 308 memcpy( str, &m_gprmc.time[GPS_TIME_HOUR_OFFSET], GPS_TIME_HOUR_SIZE );
nsrwsurasak 0:7ef27b349b37 309 t.tm_hour = atoi(str);
nsrwsurasak 0:7ef27b349b37 310
Lucyjungz 1:dceb4eaf697e 311 /* populate the date */
Lucyjungz 4:fb1cd9893eb8 312 memcpy( str, &m_gprmc.date[GPS_TIME_DATE_OFFSET], GPS_TIME_DATE_SIZE );
nsrwsurasak 0:7ef27b349b37 313 t.tm_mday = atoi(str);
nsrwsurasak 0:7ef27b349b37 314
Lucyjungz 1:dceb4eaf697e 315 /* populate the month */
Lucyjungz 4:fb1cd9893eb8 316 memcpy( str, &m_gprmc.date[GPS_TIME_MONTH_OFFSET], GPS_TIME_MONTH_SIZE );
nsrwsurasak 0:7ef27b349b37 317 t.tm_mon = atoi(str);
nsrwsurasak 0:7ef27b349b37 318
Lucyjungz 1:dceb4eaf697e 319 /* populate the year */
Lucyjungz 4:fb1cd9893eb8 320 memcpy( str, &m_gprmc.date[GPS_TIME_YEAR_OFFSET], GPS_TIME_YEAR_SIZE );
nsrwsurasak 0:7ef27b349b37 321 t.tm_year = atoi(str);
nsrwsurasak 0:7ef27b349b37 322 }
nsrwsurasak 0:7ef27b349b37 323 else
nsrwsurasak 0:7ef27b349b37 324 {
Lucyjungz 1:dceb4eaf697e 325 /* Found nothing */
Lucyjungz 4:fb1cd9893eb8 326 t.tm_mday = INVALID_TIME_DATE;
Lucyjungz 4:fb1cd9893eb8 327 t.tm_mon = INVALID_TIME_MONTH;
Lucyjungz 4:fb1cd9893eb8 328 t.tm_year = INVALID_TIME_YEAR;
nsrwsurasak 0:7ef27b349b37 329 }
Lucyjungz 1:dceb4eaf697e 330
Lucyjungz 1:dceb4eaf697e 331 /* Return the time !! */
nsrwsurasak 0:7ef27b349b37 332 return (t);
nsrwsurasak 0:7ef27b349b37 333 }