james kain / Mbed 2 deprecated Waldo_Embed_V2

this version has all of Jim's fixes for reading the GPS and IMU data synchronously

Dependencies:   MODSERIAL SDFileSystem mbed SDShell CRC CommHandler FP LinkedList LogUtil

main.cpp@12:c2f60b3ceb74, 2013-05-06 (annotated)

Committer:
jekain314
Date:
Mon May 06 04:20:10 2013 +0000
Revision:
12:c2f60b3ceb74
Parent:
7:1bec23c68a3c
Parent:
10:37ff5b97cf98
Child:
13:d5026299c54e
Merged program to add SDShell

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jekain314 0:432b860b6ff7 1 #include "mbed.h"
jekain314 0:432b860b6ff7 2 #include <string>
jekain314 0:432b860b6ff7 3
jekain314 0:432b860b6ff7 4 //set up the message buffer to be filled by the GPS read process
jekain314 0:432b860b6ff7 5 #define MODSERIAL_DEFAULT_RX_BUFFER_SIZE 256
jekain314 0:432b860b6ff7 6
jekain314 0:432b860b6ff7 7 #include "MODSERIAL.h"
jekain314 0:432b860b6ff7 8 #include "SDFileSystem.h" //imported using the import utility
jekain314 0:432b860b6ff7 9
jekain314 0:432b860b6ff7 10 //general digital I/O specifications for this application
jekain314 0:432b860b6ff7 11 //SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
jekain314 0:432b860b6ff7 12 SDFileSystem sd(p11,p12,p13,p14,"sd");
jekain314 0:432b860b6ff7 13 DigitalIn sd_detect(p27);
jekain314 0:432b860b6ff7 14 DigitalOut ppsled(LED1); //blink an LED at the 1PPS
jekain314 0:432b860b6ff7 15 DigitalOut trig1led(LED2); //blink an LED at the camera trigger detection
jekain314 1:8e24e633f8d8 16 DigitalOut rxMsg(LED3);
jekain314 1:8e24e633f8d8 17 DigitalOut txMsg(LED4);
jekain314 1:8e24e633f8d8 18 //DigitalOut recordDataled(LED4); //set the led when the record is on
jekain314 1:8e24e633f8d8 19
jekain314 1:8e24e633f8d8 20 //hardware trigger mechanization for bulb shutter commands
jekain314 1:8e24e633f8d8 21 DigitalInOut fire(p29); //connected to the tip of 2.5mm connector (T2i)
jekain314 1:8e24e633f8d8 22 DigitalInOut pre_fire(p30); //connected to the mid-connection for 2.5mm connector (T2i)
jekain314 1:8e24e633f8d8 23
jekain314 1:8e24e633f8d8 24
jekain314 0:432b860b6ff7 25 //USB serial data stream back to the PC
jekain314 0:432b860b6ff7 26 Serial toPC(USBTX, USBRX); //connect the GPS TX, RX to p9 and p10
jekain314 0:432b860b6ff7 27
jekain314 0:432b860b6ff7 28 Timer timeFromStart;
jekain314 2:7039be3daf6e 29 Timer timeFromPosVelMessageReceipt;
jekain314 0:432b860b6ff7 30
jekain314 0:432b860b6ff7 31 bool detectedGPS1PPS = false; //flag set in the ISR and reset after processing the 1PPS event
jekain314 0:432b860b6ff7 32 int PPSCounter = 0; //counts the 1PPS occurrences
jekain314 0:432b860b6ff7 33 int byteCounter = 0; //byte counter -- zeroed at 1PPS
jekain314 0:432b860b6ff7 34 unsigned short perSecMessageCounter=0; //counts the number of messages in a sec based on the header detection
jekain314 0:432b860b6ff7 35 bool messageDetected = false; //have detected a message header
jekain314 0:432b860b6ff7 36 unsigned long IMUbytesWritten = 0; //counts the IMU bytes written by the fwrite() to the SD card
jekain314 0:432b860b6ff7 37 int savedByteCounter = 0; //save ByteCounter at the 1PPS for display in main
jekain314 0:432b860b6ff7 38 int savedPerSecMessageCounter=0; //saved PerSecMsgCounter for display in main
jekain314 0:432b860b6ff7 39 int savedIMUClockCounter=0; //saved at the 1PPS for later diaplay from main
jekain314 0:432b860b6ff7 40 bool camera1EventDetected = false; //flag from ISR indicating a clock event occurred
jekain314 0:432b860b6ff7 41 double camera1Time; //GPS time of the camera event
jekain314 0:432b860b6ff7 42 int TotalBadCRCmatches = 0; //counter for the bad CRC matches for all GPS messages
jekain314 0:432b860b6ff7 43
jekain314 0:432b860b6ff7 44 volatile int PPSTimeOffset = 0;
jekain314 0:432b860b6ff7 45
sam_grove 7:1bec23c68a3c 46 // get files from the SD Card
sam_grove 7:1bec23c68a3c 47 #include "SDShell.h"
sam_grove 7:1bec23c68a3c 48 void transferFile(void)
jekain314 9:893481b2e488 49 {
jekain314 9:893481b2e488 50 SDShell emulate;
jekain314 9:893481b2e488 51 emulate.init();
jekain314 10:37ff5b97cf98 52 emulate.shell(toPC, sd, "/sd");
jekain314 9:893481b2e488 53 }
jekain314 9:893481b2e488 54
jekain314 0:432b860b6ff7 55 //////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 56 // the below should become classes
jekain314 0:432b860b6ff7 57 //////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 58 #include "OEM615.h" //OEM615 GPS activities
jekain314 0:432b860b6ff7 59 #include "ADIS16488.h" //ADIS16488 activities
jekain314 0:432b860b6ff7 60 #include "PCMessaging.h" //PC messaging activities
jekain314 0:432b860b6ff7 61
jekain314 0:432b860b6ff7 62 //ISR for detection of the GPS 1PPS
jekain314 0:432b860b6ff7 63 void detect1PPSISR(void)
jekain314 0:432b860b6ff7 64 {
jekain314 0:432b860b6ff7 65 timeFromPPS.reset(); //reset the 1PPS timer upon 1PPS detection
jekain314 0:432b860b6ff7 66 //note -- the below accounts for time information becoming available AFTER the 1PPS event
jekain314 0:432b860b6ff7 67 PPSTimeOffset++; //counts 1PPS events between matching POS and VEL messages
jekain314 0:432b860b6ff7 68
jekain314 0:432b860b6ff7 69 //covers the case where the PPS ISR interrupts the IMU data ready ISR
jekain314 0:432b860b6ff7 70 if(IMUDataReady) IMUtimeFrom1PPS = 0;
jekain314 0:432b860b6ff7 71
jekain314 0:432b860b6ff7 72 savedByteCounter = byteCounter; //save byteCounter for display in main
jekain314 0:432b860b6ff7 73 savedPerSecMessageCounter = perSecMessageCounter; //save for display un main
jekain314 0:432b860b6ff7 74 byteCounter = 0; //countes bytes between 1PPS events
jekain314 0:432b860b6ff7 75 perSecMessageCounter = 0; //counts GPS messages between 1PPS events
jekain314 0:432b860b6ff7 76
jekain314 0:432b860b6ff7 77 GPS_COM1.rxBufferFlush(); //flush the GPS serial buffer
jekain314 0:432b860b6ff7 78
jekain314 0:432b860b6ff7 79 detectedGPS1PPS = true; //set false in the main when 1PPS actions are complete
jekain314 0:432b860b6ff7 80 PPSCounter++; //count number of 1PPS epoch
jekain314 0:432b860b6ff7 81
jekain314 0:432b860b6ff7 82 ppsled = !ppsled; //blink an LED at the 1PPS
jekain314 0:432b860b6ff7 83 };
jekain314 0:432b860b6ff7 84
jekain314 0:432b860b6ff7 85
jekain314 0:432b860b6ff7 86 ///////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 87 //set up the USB port and the GPS COM port
jekain314 0:432b860b6ff7 88 ///////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 89 FILE *fpNav = NULL; //file pointer to the nav file on the SD card
jekain314 0:432b860b6ff7 90 void setupCOM(void)
jekain314 0:432b860b6ff7 91 {
jekain314 0:432b860b6ff7 92 //system starts with GPS in reset active
jekain314 0:432b860b6ff7 93 //dis-engage the reset to get the GPS started
jekain314 0:432b860b6ff7 94 GPS_Reset=1; wait_ms(1000);
jekain314 0:432b860b6ff7 95
jekain314 0:432b860b6ff7 96 //establish 1PPS ISR
jekain314 0:432b860b6ff7 97 PPSInt.rise(&detect1PPSISR);
jekain314 0:432b860b6ff7 98
jekain314 0:432b860b6ff7 99 //set the USB serial data rate -- rate must be matched at the PC end
jekain314 0:432b860b6ff7 100 //This the serial communication back to the the PC host
jekain314 0:432b860b6ff7 101 //Launch the C++ serial port read program there to catch the ASCII characters
jekain314 0:432b860b6ff7 102 //toPC.baud(9600); wait_ms(100);
jekain314 0:432b860b6ff7 103 toPC.baud(8*115200); wait_ms(100);
jekain314 0:432b860b6ff7 104 //toPC.baud(1*115200); wait_ms(100);
jekain314 6:71da5b99de97 105 //toPC.printf("\n\n released GPS from RESET and set to high baud rate \n\n");
jekain314 0:432b860b6ff7 106
jekain314 0:432b860b6ff7 107 //just wait to launch the GPS receiver
jekain314 3:e1a884e5325a 108 for (int i=0; i<5; i++) { toPC.printf("WMsg start: %3d \n", 4-i); wait(1); }
jekain314 0:432b860b6ff7 109
jekain314 0:432b860b6ff7 110 sd_detect.mode(PullUp);
jekain314 0:432b860b6ff7 111
jekain314 0:432b860b6ff7 112 if (sd_detect == 0)
jekain314 0:432b860b6ff7 113 {
jekain314 0:432b860b6ff7 114 mkdir("/sd/Data", 0777);
jekain314 0:432b860b6ff7 115 }
jekain314 0:432b860b6ff7 116 else
jekain314 0:432b860b6ff7 117 {
jekain314 6:71da5b99de97 118 toPC.printf("WMsg SD card not present \n");
jekain314 0:432b860b6ff7 119 }
jekain314 0:432b860b6ff7 120
jekain314 0:432b860b6ff7 121 //NOTE: we do not assume that the GPS receiver has been pre-set up for the WALDO_FCS functionality
jekain314 0:432b860b6ff7 122 //we alwsys start with a reset and reprogram the receiver with our data out products
jekain314 0:432b860b6ff7 123 // this prevents failure because of a blown NVRAM as occurred for the older camera systems
jekain314 0:432b860b6ff7 124
jekain314 0:432b860b6ff7 125 //this is the COM1 port from th GPS receiuver to the mbed
jekain314 0:432b860b6ff7 126 //it should be always started at 9600 baud because thats the default for the GPS receiver
jekain314 0:432b860b6ff7 127 GPS_COM1.baud(9600); wait_ms(100);
jekain314 0:432b860b6ff7 128
jekain314 0:432b860b6ff7 129 // this ASCII command sets up the serial data from the GPS receiver on its COM1
jekain314 0:432b860b6ff7 130 char ch7[] = "serialconfig COM1 9600 n 8 1 n off";
jekain314 0:432b860b6ff7 131 // this is a software reset and has the same effect as a hardware reset (why do it?)
jekain314 0:432b860b6ff7 132 //char ch0[] = "RESET";
jekain314 0:432b860b6ff7 133 //this command stops all communication from the GPS receiver on COM1
jekain314 0:432b860b6ff7 134 //logs should still be presented on USB port so the Novatel CDU application can be used on the PC in parallel
jekain314 0:432b860b6ff7 135 char ch1[] = "unlogall COM1";
jekain314 0:432b860b6ff7 136 //set the final baud rate that we will use from here
jekain314 0:432b860b6ff7 137 //allowable baud rate values: 9600 115200 230400 460800 921600
jekain314 0:432b860b6ff7 138 //char ch2[] = "serialconfig COM1 921600 n 8 1 n off";
jekain314 0:432b860b6ff7 139 char ch2[] = "serialconfig COM1 115200 n 8 1 n off";
jekain314 0:432b860b6ff7 140
jekain314 0:432b860b6ff7 141 //the below commands request the POS, VEL, RANGE, and TIME messages
jekain314 0:432b860b6ff7 142 char ch3[] = "log COM1 BESTPOSB ONTIME 1"; //messageID = 42
jekain314 0:432b860b6ff7 143 char ch4[] = "log COM1 BESTVelB ONTIME 1"; //messageID = 99
jekain314 0:432b860b6ff7 144 char ch5[] = "log COM1 RANGEB ONTIME 1"; //messageID = 43
jekain314 0:432b860b6ff7 145 //char ch6[] = "log COM1 TIMEB ONTIME 1"; //messageID = 101
jekain314 0:432b860b6ff7 146
jekain314 0:432b860b6ff7 147 //set up VARF to be 100Hz with 1X10^4 * 10^-8 = 10^-4 sec (10usec) pulse width
jekain314 0:432b860b6ff7 148 //in fact, we do not use this output but it is available.
jekain314 0:432b860b6ff7 149 //originally planned to use this to command the IMU data
jekain314 0:432b860b6ff7 150 //char ch8[] = "FREQUENCYOUT enable 10000 1000000";
jekain314 0:432b860b6ff7 151
jekain314 3:e1a884e5325a 152 toPC.printf("WMsg set serial config \n");
jekain314 0:432b860b6ff7 153 sendASCII(ch7, sizeof(ch7)); wait_ms(500);
jekain314 0:432b860b6ff7 154 //sendASCII(ch0, sizeof(ch0));
jekain314 3:e1a884e5325a 155 toPC.printf("WMsg unlog all messages \n");
jekain314 0:432b860b6ff7 156 sendASCII(ch1, sizeof(ch1)); wait_ms(500);
jekain314 3:e1a884e5325a 157 toPC.printf("WMsg log BESTPOSB on COM1 \n");
jekain314 0:432b860b6ff7 158 sendASCII(ch3, sizeof(ch3)); wait_ms(500);
jekain314 3:e1a884e5325a 159 toPC.printf("WMsg log BESTVELB on COM1\n");
jekain314 0:432b860b6ff7 160 sendASCII(ch4, sizeof(ch4)); wait_ms(500);
jekain314 3:e1a884e5325a 161 toPC.printf("WMsg log RANGEB on COM1\n");
jekain314 0:432b860b6ff7 162 sendASCII(ch5, sizeof(ch5)); wait_ms(500);
jekain314 0:432b860b6ff7 163
jekain314 0:432b860b6ff7 164 //toPC.printf("log TIMEB om COM1 \n");
jekain314 0:432b860b6ff7 165 //sendASCII(ch6, sizeof(ch6)); wait_ms(100);
jekain314 0:432b860b6ff7 166
jekain314 0:432b860b6ff7 167 //toPC.printf("Set up th VARF signal \n");
jekain314 0:432b860b6ff7 168 //sendASCII(ch8, sizeof(ch8)); wait_ms(500);
jekain314 0:432b860b6ff7 169
jekain314 0:432b860b6ff7 170 //set GPS output COM1 to the final high rate
jekain314 3:e1a884e5325a 171 toPC.printf("WMsg set the COM ports to high rate\n");
jekain314 0:432b860b6ff7 172 sendASCII(ch2, sizeof(ch2)); wait_ms(500);
jekain314 0:432b860b6ff7 173
jekain314 0:432b860b6ff7 174 //set the mbed COM port to match the GPS transmit rate
jekain314 0:432b860b6ff7 175 //the below baud rate must match the COM1 rate coming from the GPS receiver
jekain314 0:432b860b6ff7 176 GPS_COM1.baud(115200); wait_ms(500); //without this wait -- the baud rate is not detected when using MODSERIAL
jekain314 0:432b860b6ff7 177 //GPS_COM1.baud(921600); wait_ms(500); //without this wait -- the baud rate is not detected when using MODSERIAL
jekain314 0:432b860b6ff7 178 };
jekain314 0:432b860b6ff7 179
jekain314 0:432b860b6ff7 180
jekain314 0:432b860b6ff7 181 /////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 182 // mbed main to support the Waldo_FCS
jekain314 0:432b860b6ff7 183 /////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 184 int main() {
jekain314 0:432b860b6ff7 185
jekain314 0:432b860b6ff7 186 //these are structures for the to GPS messages that must be parsed
jekain314 0:432b860b6ff7 187 MESSAGEHEADER msgHdr;
jekain314 0:432b860b6ff7 188 OEM615BESTPOS posMsg; //BESTPOS structure in OEMV615.h that has matching time to a BESTVEL message
jekain314 0:432b860b6ff7 189 OEM615BESTPOS curPos; //BESTPOS structure in OEMV615.h
jekain314 0:432b860b6ff7 190 OEM615BESTVEL velMsg; //BESTVEL structure in OEMV615.h that has matching time to a BESTPOS message
jekain314 0:432b860b6ff7 191 OEM615BESTVEL curVel; //BESTVEL structure in OEMV615.h
jekain314 0:432b860b6ff7 192
jekain314 1:8e24e633f8d8 193
jekain314 1:8e24e633f8d8 194 fire.output(); //set the fire pin as outoput
jekain314 1:8e24e633f8d8 195 pre_fire.output(); //set the pre-fire pin as output
jekain314 1:8e24e633f8d8 196 //fire.mode(OpenDrain);
jekain314 1:8e24e633f8d8 197
jekain314 1:8e24e633f8d8 198 //set up for the first trigger
jekain314 1:8e24e633f8d8 199 fire = 1;
jekain314 1:8e24e633f8d8 200 pre_fire = 1;
jekain314 0:432b860b6ff7 201 //set up the GPS and mbed COM ports
jekain314 0:432b860b6ff7 202 setupCOM();
jekain314 0:432b860b6ff7 203
jekain314 0:432b860b6ff7 204 //set up the ADIS16488
jekain314 0:432b860b6ff7 205 setupADIS();
jekain314 0:432b860b6ff7 206
jekain314 0:432b860b6ff7 207 setUpMessages(); //set up the expected text message commands frm the PC
jekain314 0:432b860b6ff7 208
jekain314 0:432b860b6ff7 209 //set up the interrupt to catch the GPS receiver serial bytes as they are presented
jekain314 0:432b860b6ff7 210 GPS_COM1.attach(&readSerialByte, MODSERIAL::RxIrq);
jekain314 0:432b860b6ff7 211
jekain314 0:432b860b6ff7 212 timeFromPPS.start(); //start the time for measuring time from 1PPS events
jekain314 0:432b860b6ff7 213 timeFromStart.start();
jekain314 0:432b860b6ff7 214
jekain314 3:e1a884e5325a 215 //toPC.printf("\n\n top of the main loop \n\n");
jekain314 0:432b860b6ff7 216
jekain314 0:432b860b6ff7 217 int totalBytesWritten = 0;
jekain314 0:432b860b6ff7 218
jekain314 0:432b860b6ff7 219 /*establish the initial value for the CRC recursion atter the header
jekain314 0:432b860b6ff7 220 unsigned long CRC = 0;
jekain314 0:432b860b6ff7 221 CRC32Value(CRC, 0xAA);
jekain314 0:432b860b6ff7 222 CRC32Value(CRC, 0x44);
jekain314 0:432b860b6ff7 223 CRC32Value(CRC, 0x12);
jekain314 0:432b860b6ff7 224 CRC32Value(CRC, 0x1C);
jekain314 0:432b860b6ff7 225 //this results in a value of: 0x39b0f0e1
jekain314 0:432b860b6ff7 226 toPC.printf(" CRC after AA44121C header: %08x \n", CRC);
jekain314 0:432b860b6ff7 227 wait(20);
jekain314 0:432b860b6ff7 228 */
jekain314 1:8e24e633f8d8 229
jekain314 0:432b860b6ff7 230 recordData = true;
jekain314 0:432b860b6ff7 231 sendRecData = true;
jekain314 0:432b860b6ff7 232
jekain314 0:432b860b6ff7 233 unsigned long cyclesPerSec = 0;
jekain314 0:432b860b6ff7 234 bool GPSdataWritten = false;
jekain314 4:dda2ab5cc643 235 bool finishTrigger = false;
jekain314 4:dda2ab5cc643 236 Timer triggerInterval;
jekain314 0:432b860b6ff7 237
jekain314 1:8e24e633f8d8 238 //while(PPSCounter < 300)
jekain314 0:432b860b6ff7 239 ///////////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 240 // top of the while loop
jekain314 0:432b860b6ff7 241 ///////////////////////////////////////////////////////////////////////////
jekain314 1:8e24e633f8d8 242 while(1)
jekain314 0:432b860b6ff7 243 {
jekain314 0:432b860b6ff7 244 //read the USB serial data from the PC to check for commands
jekain314 0:432b860b6ff7 245 //in the primary real-time portion, there are no bytes from the PC so this has no impact
jekain314 0:432b860b6ff7 246 readFromPC();
jekain314 2:7039be3daf6e 247
jekain314 6:71da5b99de97 248 /*
jekain314 2:7039be3daf6e 249 //this will close the fpNav file on the SD card if the file is open
jekain314 2:7039be3daf6e 250 //and the elapsed time from PosVel messages is > 60 secs
jekain314 2:7039be3daf6e 251 //this prevents loosing the fpNav file if the PC goes down
jekain314 3:e1a884e5325a 252 if (fpNav && (timeFromPosVelMessageReceipt.read() > 60) )
jekain314 2:7039be3daf6e 253 {
jekain314 2:7039be3daf6e 254 sendRecData = true;
jekain314 2:7039be3daf6e 255 recordData = false;
jekain314 2:7039be3daf6e 256 }
jekain314 6:71da5b99de97 257 */
jekain314 0:432b860b6ff7 258
jekain314 0:432b860b6ff7 259 processPCmessages(fpNav, posMsg, velMsg);
jekain314 0:432b860b6ff7 260
jekain314 5:2ce1be9d4bef 261 if(fireTrigger) //comes from a PC request message
jekain314 1:8e24e633f8d8 262 {
jekain314 1:8e24e633f8d8 263 //pre-fire the trigger using the mid-body 2.5mm connection (T2i)
jekain314 1:8e24e633f8d8 264 pre_fire = 0; //pin30 (midbody of connector) set to zero
jekain314 1:8e24e633f8d8 265 wait(.01f); //wait for 0.25 secs
jekain314 1:8e24e633f8d8 266 fire = 0; //fire the trigger using the tip connection
jekain314 4:dda2ab5cc643 267 //wait(0.10);
jekain314 4:dda2ab5cc643 268 fireTrigger = false;
jekain314 4:dda2ab5cc643 269 finishTrigger = true;
jekain314 4:dda2ab5cc643 270 triggerInterval.start();
jekain314 4:dda2ab5cc643 271 }
jekain314 4:dda2ab5cc643 272
jekain314 6:71da5b99de97 273 //the trigger requires a pulse -- the above portion lowers the signal and the below raises it
jekain314 6:71da5b99de97 274 //this has been tested at 50 msecs and it will not fire at that pulse duration
jekain314 4:dda2ab5cc643 275 if(finishTrigger && triggerInterval.read_ms() > 100)
jekain314 4:dda2ab5cc643 276 {
jekain314 1:8e24e633f8d8 277 fire = 1;
jekain314 1:8e24e633f8d8 278 pre_fire = 1;
jekain314 1:8e24e633f8d8 279 unsigned long triggerTime = GPSTimemsecs + PPSTimeOffset*1000 + timeFromPPS.read_us()/1000.0;
jekain314 1:8e24e633f8d8 280 toPC.printf("WMsg TRIGGERTIME %10d \n", triggerTime);
jekain314 4:dda2ab5cc643 281 triggerInterval.reset();
jekain314 4:dda2ab5cc643 282 finishTrigger = false;
jekain314 1:8e24e633f8d8 283 }
jekain314 1:8e24e633f8d8 284
jekain314 0:432b860b6ff7 285 cyclesPerSec++;
jekain314 0:432b860b6ff7 286
jekain314 0:432b860b6ff7 287 //
jekain314 0:432b860b6ff7 288 ////////////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 289 //below is where we process the complete stored GPS message for the second
jekain314 0:432b860b6ff7 290 //The !IMUDataReady test prevents the IMU and GPS data from being written
jekain314 0:432b860b6ff7 291 //to disk on the same pass through this loop
jekain314 0:432b860b6ff7 292 /////////////////////////////////////////////////////////////////////////////
jekain314 0:432b860b6ff7 293
jekain314 0:432b860b6ff7 294
jekain314 0:432b860b6ff7 295 if (completeMessageAvailable && !IMUDataReady)
jekain314 0:432b860b6ff7 296 {
jekain314 0:432b860b6ff7 297
jekain314 0:432b860b6ff7 298 msgHdr = *((MESSAGEHEADER*)&msgBuffer[messageLocation[savedMessageCounter-1]]);
jekain314 0:432b860b6ff7 299
jekain314 0:432b860b6ff7 300 //these times are used to tag the IMU sample time. PPSTimeOffset increments by 1 exactly at the 1PPS event (in the 1PPS ISR)
jekain314 0:432b860b6ff7 301 //GPSTimemsecs increments by 1 for each new GPS measurement -- note that the below computations are actually
jekain314 0:432b860b6ff7 302 //done at the receipt of each GPS message. This is OK because each message has the same time in its header.
jekain314 0:432b860b6ff7 303 //Thus GPSTimemsecs increments by 1 here while GPSTimemsecs effectively decrements by 1.
jekain314 0:432b860b6ff7 304 //This handles IMU time tagging between the 1PPS event and the first receipt of a new GPS time.
jekain314 0:432b860b6ff7 305
jekain314 0:432b860b6ff7 306 GPSTimemsecs = msgHdr.GPSTime_msecs; //time in GPS message header
jekain314 0:432b860b6ff7 307 PPSTimeOffset = 0; //incremented by 1 in the PPS ISR
jekain314 0:432b860b6ff7 308
jekain314 0:432b860b6ff7 309 unsigned long msgCRC = *((unsigned long*)&msgBuffer[messageLocation[savedMessageCounter-1] + 28 + msgHdr.messageLength]);
jekain314 0:432b860b6ff7 310
jekain314 0:432b860b6ff7 311 //toPC.printf("tmeFrom1PPS= %5d ID= %3d Ln = %3d computedCRC= %08x msgCRC= %08x msgCntr = %3d CRCerr=%4d\n",
jekain314 0:432b860b6ff7 312 // timeFromPPS.read_us(), msgHdr.messageID, msgHdr.messageLength, computedCRC, msgCRC, savedMessageCounter, TotalBadCRCmatches);
jekain314 0:432b860b6ff7 313
jekain314 0:432b860b6ff7 314 if ( msgCRC != computedCRC)
jekain314 0:432b860b6ff7 315 {
jekain314 0:432b860b6ff7 316 toPC.printf(" bad CRC match for messageID %3d total CRC errors = %4d \n",
jekain314 0:432b860b6ff7 317 msgHdr.messageLength, TotalBadCRCmatches++);
jekain314 0:432b860b6ff7 318 }
jekain314 0:432b860b6ff7 319
jekain314 0:432b860b6ff7 320 if (msgHdr.messageID == 42)
jekain314 0:432b860b6ff7 321 {
jekain314 0:432b860b6ff7 322 curPos = *((OEM615BESTPOS*)&msgBuffer[messageLocation[savedMessageCounter-1]]);
jekain314 0:432b860b6ff7 323 posMsg = curPos;
jekain314 0:432b860b6ff7 324
jekain314 1:8e24e633f8d8 325 if (streamPos)
jekain314 0:432b860b6ff7 326 {
jekain314 1:8e24e633f8d8 327 toPC.printf("BESTPOS %5d %1d %8.5lf %9.5lf %5.3lf %d %d\n",
jekain314 0:432b860b6ff7 328 curPos.msgHeader.GPSTime_msecs, curPos.solStatus,
jekain314 0:432b860b6ff7 329 curPos.latitude, curPos.longitude, curPos.height,
jekain314 1:8e24e633f8d8 330 curPos.numSV, curPos.numSolSV);
jekain314 0:432b860b6ff7 331 }
jekain314 0:432b860b6ff7 332
jekain314 0:432b860b6ff7 333 }
jekain314 0:432b860b6ff7 334 else if (msgHdr.messageID == 99)
jekain314 0:432b860b6ff7 335 {
jekain314 0:432b860b6ff7 336 curVel = *((OEM615BESTVEL*)&msgBuffer[ messageLocation[savedMessageCounter-1] ]);
jekain314 1:8e24e633f8d8 337 //toPC.printf("BESTVEL vel: horizontalSpeed= %5.3f heading=%5.1f verticalSpeed=%4.2f \n",
jekain314 1:8e24e633f8d8 338 // curVel.horizontalSpeed, curVel.heading, curVel.verticalSpeed );
jekain314 0:432b860b6ff7 339 velMsg = curVel;
jekain314 0:432b860b6ff7 340 }
jekain314 5:2ce1be9d4bef 341
jekain314 0:432b860b6ff7 342 completeMessageAvailable = false;
jekain314 0:432b860b6ff7 343 }
jekain314 0:432b860b6ff7 344
jekain314 1:8e24e633f8d8 345 //write the GPS data to the SD card
jekain314 0:432b860b6ff7 346 if (!IMUDataReady && !GPSdataWritten && timeFromPPS.read_us() > 500000 && recordData && (fpNav != NULL))
jekain314 0:432b860b6ff7 347 {
jekain314 0:432b860b6ff7 348 totalBytesWritten += fwrite(&msgBuffer, 1, byteCounter, fpNav);
jekain314 0:432b860b6ff7 349 GPSdataWritten = true;
jekain314 0:432b860b6ff7 350 }
jekain314 0:432b860b6ff7 351
jekain314 0:432b860b6ff7 352 //the IMU data record is read from the SPI in the ISR and the IMUDataReady is set true
jekain314 0:432b860b6ff7 353 //we write the IMU data here
jekain314 0:432b860b6ff7 354 if (IMUDataReady) //IMUDataReady is true if we have a recent IMU data record
jekain314 0:432b860b6ff7 355 {
jekain314 0:432b860b6ff7 356 //write the IMU data
jekain314 0:432b860b6ff7 357 if ( recordData && (fpNav != NULL) )
jekain314 0:432b860b6ff7 358 {
jekain314 1:8e24e633f8d8 359 //delTimeOfWrite = timeFromStart.read_us();
jekain314 0:432b860b6ff7 360
jekain314 0:432b860b6ff7 361 if (fillingPingWritingPong) fwrite(&imuPong, 1, IMUrecArraySize*sizeof(IMUREC), fpNav);
jekain314 0:432b860b6ff7 362 else fwrite(&imuPing, 1, IMUrecArraySize*sizeof(IMUREC), fpNav);
jekain314 0:432b860b6ff7 363
jekain314 1:8e24e633f8d8 364 //delTimeOfWrite = (unsigned long)((unsigned long)timeFromStart.read_us() - delTimeOfWrite);
jekain314 1:8e24e633f8d8 365 //if (delTimeOfWrite > maxWriteTime) maxWriteTime = delTimeOfWrite;
jekain314 0:432b860b6ff7 366 }
jekain314 0:432b860b6ff7 367 IMURecordCounter+=IMUrecArraySize;
jekain314 0:432b860b6ff7 368 IMUDataReady = false;
jekain314 0:432b860b6ff7 369 }
jekain314 0:432b860b6ff7 370
jekain314 0:432b860b6ff7 371 if (camera1EventDetected) //we have detected a camera trigger event
jekain314 0:432b860b6ff7 372 {
jekain314 0:432b860b6ff7 373 toPC.printf("WMsg TRIGGERTIME %5.3lf\n", camera1Time);
jekain314 0:432b860b6ff7 374 camera1EventDetected = false;
jekain314 0:432b860b6ff7 375 }
jekain314 0:432b860b6ff7 376
jekain314 0:432b860b6ff7 377 if (detectedGPS1PPS) //true if we are exactly at a 1PPS event detection
jekain314 0:432b860b6ff7 378 {
jekain314 1:8e24e633f8d8 379 //toPC.printf("PPS=%4d stat=%1d bytes=%3d GPSMsgs=%2d #write=%8d cycles=%6d\n",
jekain314 1:8e24e633f8d8 380 // PPSCounter, posMsg.solStatus, savedByteCounter, savedPerSecMessageCounter,
jekain314 1:8e24e633f8d8 381 // totalBytesWritten, cyclesPerSec );
jekain314 0:432b860b6ff7 382
jekain314 0:432b860b6ff7 383 cyclesPerSec = 0;
jekain314 0:432b860b6ff7 384 totalBytesWritten = 0;
jekain314 0:432b860b6ff7 385 GPSdataWritten = false;
jekain314 0:432b860b6ff7 386
jekain314 0:432b860b6ff7 387 IMURecordCounter = 0;
jekain314 0:432b860b6ff7 388 detectedGPS1PPS = false;
jekain314 0:432b860b6ff7 389 }
sam_grove 7:1bec23c68a3c 390
sam_grove 7:1bec23c68a3c 391 if(get_file_msg)
sam_grove 7:1bec23c68a3c 392 {
sam_grove 7:1bec23c68a3c 393 get_file_msg = false;
sam_grove 7:1bec23c68a3c 394 ADIS_RST = 0;
sam_grove 7:1bec23c68a3c 395 GPS_Reset = 0;
sam_grove 7:1bec23c68a3c 396 fclose(fpNav);
sam_grove 7:1bec23c68a3c 397 transferFile();
sam_grove 7:1bec23c68a3c 398
sam_grove 7:1bec23c68a3c 399 }
jekain314 0:432b860b6ff7 400 }
jekain314 0:432b860b6ff7 401
jekain314 0:432b860b6ff7 402 fclose(fpNav);
jekain314 0:432b860b6ff7 403 toPC.printf(" normal termination \n");
jekain314 0:432b860b6ff7 404 }