Test software for SatChat prototype hardware Platform - MAX32630FTHR
Dependencies: USBDevice max32630fthr
main.cpp@14:8ff04e82bda2, 2017-07-03 (annotated)
- Committer:
- koziniec
- Date:
- Mon Jul 03 16:50:59 2017 +0000
- Revision:
- 14:8ff04e82bda2
- Parent:
- 13:ff0b39177386
- Child:
- 15:7d75ecaeabdb
green led if a gps fix is obtained (time is set); red led if gps times out.; blue led if waiting for gps and flashing if time but no fix obtained; ; code in main needs some proper switch input and calls to rockblock routines but so far ok.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
koziniec | 0:59c04ca89ae2 | 1 | |
koziniec | 0:59c04ca89ae2 | 2 | #include "mbed.h" |
koziniec | 0:59c04ca89ae2 | 3 | #include "max32630fthr.h" |
koziniec | 1:b8cb82927f33 | 4 | #include <stdbool.h> |
koziniec | 13:ff0b39177386 | 5 | #define ON 0 |
koziniec | 13:ff0b39177386 | 6 | #define OFF 1 |
koziniec | 13:ff0b39177386 | 7 | #define EXIT_SUCCESS 0 |
koziniec | 13:ff0b39177386 | 8 | #define EXIT_FAILURE 1 |
koziniec | 14:8ff04e82bda2 | 9 | const int GPS_TIMEOUT=180; //Wait three minutes maximum for GPS. |
koziniec | 14:8ff04e82bda2 | 10 | |
koziniec | 0:59c04ca89ae2 | 11 | Serial pc(USBTX, USBRX); |
koziniec | 1:b8cb82927f33 | 12 | Serial gps(P5_3, P5_4, 9600); |
koziniec | 0:59c04ca89ae2 | 13 | I2C i2c(P5_7,P6_0); // SDA, SCL |
koziniec | 0:59c04ca89ae2 | 14 | |
koziniec | 1:b8cb82927f33 | 15 | DigitalOut red_led(LED1,1); |
koziniec | 1:b8cb82927f33 | 16 | DigitalOut green_led(LED2,1); |
koziniec | 14:8ff04e82bda2 | 17 | DigitalOut gps_led(LED3,1); //Blue |
koziniec | 9:b8a60ade343e | 18 | char gpsfix_last_utc_time[11] = {0}; |
koziniec | 9:b8a60ade343e | 19 | char gpsfix_last_utc_date[7] = {0}; |
koziniec | 9:b8a60ade343e | 20 | char gpsfix_longtitude[12] = {0}; |
koziniec | 9:b8a60ade343e | 21 | char gpsfix_latitude[12] = {0}; |
koziniec | 9:b8a60ade343e | 22 | char gpsfix_speed[8] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 23 | char gpsfix_course[7] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 24 | char gpsfix_variation[7] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 25 | char gpsfix_mag_var_ew[1] = {0};//Set but not used |
koziniec | 11:a9c16968e7f6 | 26 | char gpsfix_ns = 0; |
koziniec | 11:a9c16968e7f6 | 27 | char gpsfix_ew = 0; |
koziniec | 13:ff0b39177386 | 28 | bool gps_data_present = false; //If this is false we can't even use stale GPS data. |
koziniec | 9:b8a60ade343e | 29 | |
koziniec | 1:b8cb82927f33 | 30 | void gps_power(bool state) |
koziniec | 1:b8cb82927f33 | 31 | { |
koziniec | 1:b8cb82927f33 | 32 | char data[2]; |
koziniec | 1:b8cb82927f33 | 33 | data[0] = 0x16; //MAX14690 LDO3cfg register |
koziniec | 13:ff0b39177386 | 34 | if (state == ON) { |
koziniec | 1:b8cb82927f33 | 35 | data[1] = 0xE2; //Enable LDO3 |
koziniec | 14:8ff04e82bda2 | 36 | i2c.write( 0x50, data, 2 ); |
koziniec | 14:8ff04e82bda2 | 37 | gps_led=ON; |
koziniec | 14:8ff04e82bda2 | 38 | } else { |
koziniec | 14:8ff04e82bda2 | 39 | data[1] = 0xE0; //Disable LDO3 |
koziniec | 14:8ff04e82bda2 | 40 | i2c.write( 0x50, data, 2 ); |
koziniec | 14:8ff04e82bda2 | 41 | gps_led=OFF; |
koziniec | 14:8ff04e82bda2 | 42 | while (gps.readable()) { |
koziniec | 14:8ff04e82bda2 | 43 | char dummy = gps.getc(); //Empty serial buffer because overflows reveal MBED bugs :-( |
koziniec | 14:8ff04e82bda2 | 44 | } |
koziniec | 1:b8cb82927f33 | 45 | } |
koziniec | 1:b8cb82927f33 | 46 | } |
koziniec | 1:b8cb82927f33 | 47 | |
koziniec | 13:ff0b39177386 | 48 | int get_epoch_from_last_gps_time(void) |
koziniec | 12:a895e3581542 | 49 | { |
koziniec | 12:a895e3581542 | 50 | struct tm t; |
koziniec | 13:ff0b39177386 | 51 | time_t epoch; |
koziniec | 12:a895e3581542 | 52 | char two_char_str[3] = {0}; |
koziniec | 12:a895e3581542 | 53 | memcpy(two_char_str, gpsfix_last_utc_date+4, 2); |
koziniec | 12:a895e3581542 | 54 | t.tm_year = atoi(two_char_str)+100; //Years since 1900 |
koziniec | 12:a895e3581542 | 55 | memcpy(two_char_str, gpsfix_last_utc_date+2, 2); |
koziniec | 12:a895e3581542 | 56 | t.tm_mon = atoi(two_char_str)-1; // Month, 0 - jan gpsfix_last_utc_date |
koziniec | 12:a895e3581542 | 57 | memcpy(two_char_str, gpsfix_last_utc_date, 2); |
koziniec | 12:a895e3581542 | 58 | t.tm_mday = atoi(two_char_str); // Day of the month gpsfix_last_utc_date |
koziniec | 12:a895e3581542 | 59 | memcpy(two_char_str, gpsfix_last_utc_time, 2); |
koziniec | 12:a895e3581542 | 60 | t.tm_hour = atoi(two_char_str); |
koziniec | 12:a895e3581542 | 61 | memcpy(two_char_str, gpsfix_last_utc_time+2, 2); |
koziniec | 12:a895e3581542 | 62 | t.tm_min = atoi(two_char_str); |
koziniec | 13:ff0b39177386 | 63 | memcpy(two_char_str, gpsfix_last_utc_time+4, 2); |
koziniec | 12:a895e3581542 | 64 | t.tm_sec = atoi(two_char_str); |
koziniec | 12:a895e3581542 | 65 | t.tm_isdst = 0; // Is DST on? 1 = yes, 0 = no, -1 = unknown |
koziniec | 13:ff0b39177386 | 66 | epoch = mktime(&t); |
koziniec | 13:ff0b39177386 | 67 | return epoch; |
koziniec | 12:a895e3581542 | 68 | } |
koziniec | 12:a895e3581542 | 69 | |
koziniec | 13:ff0b39177386 | 70 | int gps_update(void) |
koziniec | 1:b8cb82927f33 | 71 | { |
koziniec | 13:ff0b39177386 | 72 | gps_power(ON); |
koziniec | 13:ff0b39177386 | 73 | time_t gps_on_time = time(NULL); //Start time for GPS timeout calculation. |
koziniec | 13:ff0b39177386 | 74 | bool wait_for_fix = true; //Set this to false once a fix is obtained. |
koziniec | 13:ff0b39177386 | 75 | while (wait_for_fix) { //Keep monitoring the GPS until we get a fix. |
koziniec | 14:8ff04e82bda2 | 76 | if ((time(NULL) - gps_on_time) > GPS_TIMEOUT) { |
koziniec | 13:ff0b39177386 | 77 | gps_power(OFF); |
koziniec | 13:ff0b39177386 | 78 | return EXIT_FAILURE; //Return an error if the GPS takes too long for a fix. |
koziniec | 13:ff0b39177386 | 79 | } |
koziniec | 7:4218bb385ca4 | 80 | int checksum = 0; |
koziniec | 13:ff0b39177386 | 81 | char nmea_sentence[83] = {0}; //NMEA length max is 82 + 1 terminator. Fill with NULL terminators to save doing it later. |
koziniec | 8:b4a6c632c809 | 82 | while (gps.getc()!='$'); //wait for start of sentence |
koziniec | 1:b8cb82927f33 | 83 | int nmea_index = 0; |
koziniec | 7:4218bb385ca4 | 84 | nmea_sentence[nmea_index] = '$'; //Manually insert the '$' because we don't want it included in the checksum loop |
koziniec | 8:b4a6c632c809 | 85 | char nmea_char = gps.getc(); //get sentence first char from GPS |
koziniec | 8:b4a6c632c809 | 86 | while (nmea_char != '*') { //Loop building sentence and calc'ing CS until * |
koziniec | 9:b8a60ade343e | 87 | checksum ^= nmea_char; //Calc checksum as we read sentence |
koziniec | 7:4218bb385ca4 | 88 | if ((nmea_sentence[nmea_index] == ',')&&(nmea_char == ',')) { |
koziniec | 8:b4a6c632c809 | 89 | nmea_sentence[++nmea_index] = ' '; //Pad consecutive comma with a space to make it possible to use strtok with empty values |
koziniec | 3:1dff075c1c88 | 90 | } |
koziniec | 7:4218bb385ca4 | 91 | nmea_sentence[++nmea_index] = nmea_char; //build the sentence with the next character |
koziniec | 13:ff0b39177386 | 92 | if (nmea_index > 81) { |
koziniec | 13:ff0b39177386 | 93 | nmea_index=81; //Don't overflow sentence buffer |
koziniec | 1:b8cb82927f33 | 94 | } |
koziniec | 7:4218bb385ca4 | 95 | nmea_char = gps.getc(); //get next char from GPS |
koziniec | 1:b8cb82927f33 | 96 | } |
koziniec | 13:ff0b39177386 | 97 | //Last character was the '*' so next two are CS |
koziniec | 8:b4a6c632c809 | 98 | char hex_checksum[3] = {0}; |
koziniec | 8:b4a6c632c809 | 99 | hex_checksum[0] = gps.getc(); |
koziniec | 8:b4a6c632c809 | 100 | hex_checksum[1] = gps.getc(); |
koziniec | 13:ff0b39177386 | 101 | if (checksum == (int)strtol(hex_checksum, NULL, 16) ) { //Compare calc and read checksums. |
koziniec | 13:ff0b39177386 | 102 | |
koziniec | 9:b8a60ade343e | 103 | //Valid sentence so check if it's a GPRMC |
koziniec | 9:b8a60ade343e | 104 | const char gprmc[7] = "$GPRMC"; |
koziniec | 9:b8a60ade343e | 105 | char *token; |
koziniec | 9:b8a60ade343e | 106 | token = strtok(nmea_sentence, ","); |
koziniec | 9:b8a60ade343e | 107 | if (strcmp(token,gprmc) == 0) { //GPRMC ? |
koziniec | 13:ff0b39177386 | 108 | //pc.printf( " %s\n\r", token ); //Get the time |
koziniec | 9:b8a60ade343e | 109 | if (token != NULL) { |
koziniec | 9:b8a60ade343e | 110 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 111 | if (*token != 32) { //If there is a time present (anything but a space), record it. |
koziniec | 13:ff0b39177386 | 112 | //pc.printf("Time: %s\n\r",token); |
koziniec | 14:8ff04e82bda2 | 113 | gps_led =! gps_led; //Flash blue LED |
koziniec | 11:a9c16968e7f6 | 114 | memcpy(gpsfix_last_utc_time, token, sizeof gpsfix_last_utc_time - 1); |
koziniec | 11:a9c16968e7f6 | 115 | } |
koziniec | 9:b8a60ade343e | 116 | } |
koziniec | 9:b8a60ade343e | 117 | if (token != NULL) { |
koziniec | 9:b8a60ade343e | 118 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 119 | /* if (*token == 'V') { |
koziniec | 10:349d4fa9037f | 120 | pc.printf("VOID"); |
koziniec | 13:ff0b39177386 | 121 | } */ |
koziniec | 13:ff0b39177386 | 122 | } |
koziniec | 12:a895e3581542 | 123 | if (*token == 'A') { //Is this an 'A'ctive (valid) fix? |
koziniec | 10:349d4fa9037f | 124 | pc.printf("Got a fix\n\r"); |
koziniec | 13:ff0b39177386 | 125 | gps_power(OFF); //Yes - No need for GPS now |
koziniec | 12:a895e3581542 | 126 | wait_for_fix = false; //Stop looping now we have a fix. |
koziniec | 10:349d4fa9037f | 127 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 128 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 129 | //pc.printf("Latitude: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 130 | memcpy(gpsfix_latitude, token, sizeof gpsfix_latitude - 1); |
koziniec | 10:349d4fa9037f | 131 | } |
koziniec | 10:349d4fa9037f | 132 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 133 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 134 | //pc.printf("North/South: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 135 | gpsfix_ns = *token; |
koziniec | 10:349d4fa9037f | 136 | } |
koziniec | 10:349d4fa9037f | 137 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 138 | token = strtok(NULL, ","); |
koziniec | 12:a895e3581542 | 139 | //pc.printf("Longitude: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 140 | memcpy(gpsfix_longtitude, token, sizeof gpsfix_longtitude - 1); |
koziniec | 10:349d4fa9037f | 141 | } |
koziniec | 10:349d4fa9037f | 142 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 143 | token = strtok(NULL, ","); |
koziniec | 12:a895e3581542 | 144 | //pc.printf("East/West: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 145 | gpsfix_ew = *token; |
koziniec | 10:349d4fa9037f | 146 | } |
koziniec | 10:349d4fa9037f | 147 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 148 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 149 | pc.printf("Speed in knots: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 150 | } |
koziniec | 10:349d4fa9037f | 151 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 152 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 153 | //pc.printf("True course: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 154 | } |
koziniec | 10:349d4fa9037f | 155 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 156 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 157 | //pc.printf("Date: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 158 | memcpy(gpsfix_last_utc_date, token, sizeof gpsfix_last_utc_date - 1); |
koziniec | 10:349d4fa9037f | 159 | } |
koziniec | 10:349d4fa9037f | 160 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 161 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 162 | //pc.printf("Variation: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 163 | } |
koziniec | 10:349d4fa9037f | 164 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 165 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 166 | //pc.printf("Variation East/West: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 167 | } |
koziniec | 10:349d4fa9037f | 168 | } |
koziniec | 9:b8a60ade343e | 169 | } |
koziniec | 8:b4a6c632c809 | 170 | } |
koziniec | 1:b8cb82927f33 | 171 | } |
koziniec | 13:ff0b39177386 | 172 | return EXIT_SUCCESS; |
koziniec | 12:a895e3581542 | 173 | } |
koziniec | 1:b8cb82927f33 | 174 | |
koziniec | 13:ff0b39177386 | 175 | main() |
koziniec | 1:b8cb82927f33 | 176 | { |
koziniec | 1:b8cb82927f33 | 177 | char data[2]; |
koziniec | 1:b8cb82927f33 | 178 | data[0] = 0x1A; //MAX14690 BootCfg register |
koziniec | 1:b8cb82927f33 | 179 | data[1] = 0x30; //Always-On Mode, off state via PWR_OFF_CMD |
koziniec | 0:59c04ca89ae2 | 180 | i2c.write( 0x50, data, 2 ); |
koziniec | 0:59c04ca89ae2 | 181 | |
koziniec | 1:b8cb82927f33 | 182 | data[0] = 0x17; //MAX14690 LDO3Vset register |
koziniec | 0:59c04ca89ae2 | 183 | data[1] = 0x19; //3.3V |
koziniec | 0:59c04ca89ae2 | 184 | i2c.write( 0x50, data, 2 ); |
koziniec | 13:ff0b39177386 | 185 | gps_power(OFF); |
koziniec | 6:af25f19eb4e6 | 186 | wait(2); |
koziniec | 13:ff0b39177386 | 187 | pc.printf("\n\n\rOpen EPIRB - Simple mode\n\r"); |
koziniec | 13:ff0b39177386 | 188 | pc.printf("Press and hold both side buttons to signal rescue needed\n\r"); |
koziniec | 13:ff0b39177386 | 189 | pc.printf("Full functionality will start in:"); |
koziniec | 13:ff0b39177386 | 190 | for (int i=9; i > 0; i--) { |
koziniec | 13:ff0b39177386 | 191 | time_t seconds = time(NULL); //get current epoch |
koziniec | 13:ff0b39177386 | 192 | pc.printf("%d",i); |
koziniec | 13:ff0b39177386 | 193 | while(time(NULL) - seconds < 1) { |
koziniec | 13:ff0b39177386 | 194 | if (true/*button_combination()==SOS_PRESSED*/) { |
koziniec | 13:ff0b39177386 | 195 | //do the emergency code |
koziniec | 13:ff0b39177386 | 196 | if (gps_update()==EXIT_SUCCESS) { |
koziniec | 13:ff0b39177386 | 197 | gps_data_present = true; |
koziniec | 13:ff0b39177386 | 198 | int gps_epoch = get_epoch_from_last_gps_time(); |
koziniec | 13:ff0b39177386 | 199 | set_time(gps_epoch); |
koziniec | 13:ff0b39177386 | 200 | pc.printf("Got a GPS fix and time.\n\r"); |
koziniec | 13:ff0b39177386 | 201 | pc.printf("Sending SOS in 10 seconds"); |
koziniec | 13:ff0b39177386 | 202 | green_led=ON; |
koziniec | 13:ff0b39177386 | 203 | } else { |
koziniec | 13:ff0b39177386 | 204 | pc.printf("\n\rGPS timed out and we have no existing fix.\n\r"); |
koziniec | 13:ff0b39177386 | 205 | pc.printf("We can send an Iridium packet but coordinates are rough.\n\r"); |
koziniec | 14:8ff04e82bda2 | 206 | pc.printf("Sending SOS in 10 seconds"); |
koziniec | 14:8ff04e82bda2 | 207 | red_led=ON; |
koziniec | 13:ff0b39177386 | 208 | } |
koziniec | 13:ff0b39177386 | 209 | while(true) {}; //STOP HERE |
koziniec | 13:ff0b39177386 | 210 | } |
koziniec | 13:ff0b39177386 | 211 | } |
koziniec | 13:ff0b39177386 | 212 | pc.printf("\b"); //Backspace |
koziniec | 0:59c04ca89ae2 | 213 | } |
koziniec | 13:ff0b39177386 | 214 | // normal functionality lives here |
koziniec | 13:ff0b39177386 | 215 | pc.printf("\n\rStarting normal operation\n\r"); |
koziniec | 13:ff0b39177386 | 216 | /* |
koziniec | 13:ff0b39177386 | 217 | if (true) { //Temp simulation |
koziniec | 13:ff0b39177386 | 218 | while (1) { |
koziniec | 13:ff0b39177386 | 219 | if (gps_update()==EXIT_SUCCESS) { |
koziniec | 13:ff0b39177386 | 220 | gps_data_present = true; |
koziniec | 13:ff0b39177386 | 221 | int gps_epoch = get_epoch_from_last_gps_time(); |
koziniec | 13:ff0b39177386 | 222 | set_time(gps_epoch); |
koziniec | 13:ff0b39177386 | 223 | pc.printf("Got a GPS fix and time.\n\r"); |
koziniec | 13:ff0b39177386 | 224 | } else { |
koziniec | 13:ff0b39177386 | 225 | pc.printf("GPS timed out and we have no existing fix.\n\r"); |
koziniec | 13:ff0b39177386 | 226 | pc.printf("We can send an Iridium packet but coordinates are rough.\n\r"); |
koziniec | 13:ff0b39177386 | 227 | } |
koziniec | 13:ff0b39177386 | 228 | time_t seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 229 | //printf("Time as a basic string = %s", ctime(&seconds)); |
koziniec | 13:ff0b39177386 | 230 | wait(60); |
koziniec | 13:ff0b39177386 | 231 | seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 232 | |
koziniec | 13:ff0b39177386 | 233 | wait(33); |
koziniec | 13:ff0b39177386 | 234 | seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 235 | printf("Time as a basic string = %s", ctime(&seconds)); |
koziniec | 13:ff0b39177386 | 236 | wait(60); |
koziniec | 13:ff0b39177386 | 237 | } */ |
koziniec | 13:ff0b39177386 | 238 | } |
koziniec | 0:59c04ca89ae2 | 239 | |
koziniec | 0:59c04ca89ae2 | 240 | |
koziniec | 7:4218bb385ca4 | 241 | |
koziniec | 7:4218bb385ca4 | 242 | |
koziniec | 7:4218bb385ca4 | 243 | |
koziniec | 0:59c04ca89ae2 | 244 | |
koziniec | 7:4218bb385ca4 | 245 | |
koziniec | 0:59c04ca89ae2 | 246 | |
koziniec | 7:4218bb385ca4 | 247 |