Test software for SatChat prototype hardware Platform - MAX32630FTHR
Dependencies: USBDevice max32630fthr
main.cpp@13:ff0b39177386, 2017-07-03 (annotated)
- Committer:
- koziniec
- Date:
- Mon Jul 03 15:46:51 2017 +0000
- Revision:
- 13:ff0b39177386
- Parent:
- 12:a895e3581542
- Child:
- 14:8ff04e82bda2
Not fully tested but the start of the BLACK code framework.; Commit before moving the buffer clearing code to GPS(OFF)
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 | 0:59c04ca89ae2 | 9 | Serial pc(USBTX, USBRX); |
koziniec | 1:b8cb82927f33 | 10 | Serial gps(P5_3, P5_4, 9600); |
koziniec | 0:59c04ca89ae2 | 11 | I2C i2c(P5_7,P6_0); // SDA, SCL |
koziniec | 0:59c04ca89ae2 | 12 | |
koziniec | 1:b8cb82927f33 | 13 | DigitalOut red_led(LED1,1); |
koziniec | 1:b8cb82927f33 | 14 | DigitalOut green_led(LED2,1); |
koziniec | 1:b8cb82927f33 | 15 | DigitalOut blue_led(LED3,1); |
koziniec | 9:b8a60ade343e | 16 | char gpsfix_last_utc_time[11] = {0}; |
koziniec | 9:b8a60ade343e | 17 | char gpsfix_last_utc_date[7] = {0}; |
koziniec | 9:b8a60ade343e | 18 | char gpsfix_longtitude[12] = {0}; |
koziniec | 9:b8a60ade343e | 19 | char gpsfix_latitude[12] = {0}; |
koziniec | 9:b8a60ade343e | 20 | char gpsfix_speed[8] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 21 | char gpsfix_course[7] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 22 | char gpsfix_variation[7] = {0}; //Set but not used |
koziniec | 9:b8a60ade343e | 23 | char gpsfix_mag_var_ew[1] = {0};//Set but not used |
koziniec | 11:a9c16968e7f6 | 24 | char gpsfix_ns = 0; |
koziniec | 11:a9c16968e7f6 | 25 | char gpsfix_ew = 0; |
koziniec | 13:ff0b39177386 | 26 | bool gps_data_present = false; //If this is false we can't even use stale GPS data. |
koziniec | 9:b8a60ade343e | 27 | |
koziniec | 1:b8cb82927f33 | 28 | void gps_power(bool state) |
koziniec | 1:b8cb82927f33 | 29 | { |
koziniec | 1:b8cb82927f33 | 30 | char data[2]; |
koziniec | 1:b8cb82927f33 | 31 | data[0] = 0x16; //MAX14690 LDO3cfg register |
koziniec | 1:b8cb82927f33 | 32 | data[1] = 0xE0; //Disable LDO3 |
koziniec | 13:ff0b39177386 | 33 | if (state == ON) { |
koziniec | 1:b8cb82927f33 | 34 | data[1] = 0xE2; //Enable LDO3 |
koziniec | 1:b8cb82927f33 | 35 | } |
koziniec | 9:b8a60ade343e | 36 | i2c.write( 0x50, data, 2 ); |
koziniec | 1:b8cb82927f33 | 37 | } |
koziniec | 1:b8cb82927f33 | 38 | |
koziniec | 13:ff0b39177386 | 39 | int get_epoch_from_last_gps_time(void) |
koziniec | 12:a895e3581542 | 40 | { |
koziniec | 12:a895e3581542 | 41 | struct tm t; |
koziniec | 13:ff0b39177386 | 42 | time_t epoch; |
koziniec | 12:a895e3581542 | 43 | char two_char_str[3] = {0}; |
koziniec | 12:a895e3581542 | 44 | memcpy(two_char_str, gpsfix_last_utc_date+4, 2); |
koziniec | 12:a895e3581542 | 45 | t.tm_year = atoi(two_char_str)+100; //Years since 1900 |
koziniec | 12:a895e3581542 | 46 | memcpy(two_char_str, gpsfix_last_utc_date+2, 2); |
koziniec | 12:a895e3581542 | 47 | t.tm_mon = atoi(two_char_str)-1; // Month, 0 - jan gpsfix_last_utc_date |
koziniec | 12:a895e3581542 | 48 | memcpy(two_char_str, gpsfix_last_utc_date, 2); |
koziniec | 12:a895e3581542 | 49 | t.tm_mday = atoi(two_char_str); // Day of the month gpsfix_last_utc_date |
koziniec | 12:a895e3581542 | 50 | memcpy(two_char_str, gpsfix_last_utc_time, 2); |
koziniec | 12:a895e3581542 | 51 | t.tm_hour = atoi(two_char_str); |
koziniec | 12:a895e3581542 | 52 | memcpy(two_char_str, gpsfix_last_utc_time+2, 2); |
koziniec | 12:a895e3581542 | 53 | t.tm_min = atoi(two_char_str); |
koziniec | 13:ff0b39177386 | 54 | memcpy(two_char_str, gpsfix_last_utc_time+4, 2); |
koziniec | 12:a895e3581542 | 55 | t.tm_sec = atoi(two_char_str); |
koziniec | 12:a895e3581542 | 56 | t.tm_isdst = 0; // Is DST on? 1 = yes, 0 = no, -1 = unknown |
koziniec | 13:ff0b39177386 | 57 | epoch = mktime(&t); |
koziniec | 13:ff0b39177386 | 58 | return epoch; |
koziniec | 12:a895e3581542 | 59 | } |
koziniec | 12:a895e3581542 | 60 | |
koziniec | 13:ff0b39177386 | 61 | int gps_update(void) |
koziniec | 1:b8cb82927f33 | 62 | { |
koziniec | 13:ff0b39177386 | 63 | #define GPS_TIMEOUT 120; //Wait two minutes maximum for GPS. |
koziniec | 13:ff0b39177386 | 64 | gps_power(ON); |
koziniec | 13:ff0b39177386 | 65 | time_t gps_on_time = time(NULL); //Start time for GPS timeout calculation. |
koziniec | 13:ff0b39177386 | 66 | bool wait_for_fix = true; //Set this to false once a fix is obtained. |
koziniec | 13:ff0b39177386 | 67 | blue_led = ON; |
koziniec | 13:ff0b39177386 | 68 | while (wait_for_fix) { //Keep monitoring the GPS until we get a fix. |
koziniec | 13:ff0b39177386 | 69 | if ((time(NULL) - gps_on_time ) > 120) { |
koziniec | 13:ff0b39177386 | 70 | gps_power(OFF); |
koziniec | 13:ff0b39177386 | 71 | blue_led = OFF; |
koziniec | 13:ff0b39177386 | 72 | while (gps.readable()) { |
koziniec | 13:ff0b39177386 | 73 | char dummy = gps.getc(); //Empty serial buffer because overflows reveal MBED bugs :-( |
koziniec | 13:ff0b39177386 | 74 | } |
koziniec | 13:ff0b39177386 | 75 | return EXIT_FAILURE; //Return an error if the GPS takes too long for a fix. |
koziniec | 13:ff0b39177386 | 76 | } |
koziniec | 7:4218bb385ca4 | 77 | int checksum = 0; |
koziniec | 13:ff0b39177386 | 78 | char nmea_sentence[83] = {0}; //NMEA length max is 82 + 1 terminator. Fill with NULL terminators to save doing it later. |
koziniec | 8:b4a6c632c809 | 79 | while (gps.getc()!='$'); //wait for start of sentence |
koziniec | 1:b8cb82927f33 | 80 | int nmea_index = 0; |
koziniec | 7:4218bb385ca4 | 81 | nmea_sentence[nmea_index] = '$'; //Manually insert the '$' because we don't want it included in the checksum loop |
koziniec | 8:b4a6c632c809 | 82 | char nmea_char = gps.getc(); //get sentence first char from GPS |
koziniec | 8:b4a6c632c809 | 83 | while (nmea_char != '*') { //Loop building sentence and calc'ing CS until * |
koziniec | 9:b8a60ade343e | 84 | checksum ^= nmea_char; //Calc checksum as we read sentence |
koziniec | 7:4218bb385ca4 | 85 | if ((nmea_sentence[nmea_index] == ',')&&(nmea_char == ',')) { |
koziniec | 8:b4a6c632c809 | 86 | nmea_sentence[++nmea_index] = ' '; //Pad consecutive comma with a space to make it possible to use strtok with empty values |
koziniec | 3:1dff075c1c88 | 87 | } |
koziniec | 7:4218bb385ca4 | 88 | nmea_sentence[++nmea_index] = nmea_char; //build the sentence with the next character |
koziniec | 13:ff0b39177386 | 89 | if (nmea_index > 81) { |
koziniec | 13:ff0b39177386 | 90 | nmea_index=81; //Don't overflow sentence buffer |
koziniec | 1:b8cb82927f33 | 91 | } |
koziniec | 7:4218bb385ca4 | 92 | nmea_char = gps.getc(); //get next char from GPS |
koziniec | 1:b8cb82927f33 | 93 | } |
koziniec | 13:ff0b39177386 | 94 | //Last character was the '*' so next two are CS |
koziniec | 8:b4a6c632c809 | 95 | char hex_checksum[3] = {0}; |
koziniec | 8:b4a6c632c809 | 96 | hex_checksum[0] = gps.getc(); |
koziniec | 8:b4a6c632c809 | 97 | hex_checksum[1] = gps.getc(); |
koziniec | 13:ff0b39177386 | 98 | if (checksum == (int)strtol(hex_checksum, NULL, 16) ) { //Compare calc and read checksums. |
koziniec | 13:ff0b39177386 | 99 | |
koziniec | 9:b8a60ade343e | 100 | //Valid sentence so check if it's a GPRMC |
koziniec | 9:b8a60ade343e | 101 | const char gprmc[7] = "$GPRMC"; |
koziniec | 9:b8a60ade343e | 102 | char *token; |
koziniec | 9:b8a60ade343e | 103 | token = strtok(nmea_sentence, ","); |
koziniec | 9:b8a60ade343e | 104 | if (strcmp(token,gprmc) == 0) { //GPRMC ? |
koziniec | 13:ff0b39177386 | 105 | //pc.printf( " %s\n\r", token ); //Get the time |
koziniec | 9:b8a60ade343e | 106 | if (token != NULL) { |
koziniec | 9:b8a60ade343e | 107 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 108 | if (*token != 32) { //If there is a time present (anything but a space), record it. |
koziniec | 13:ff0b39177386 | 109 | //pc.printf("Time: %s\n\r",token); |
koziniec | 13:ff0b39177386 | 110 | blue_led =! blue_led; //Flash blue LED |
koziniec | 11:a9c16968e7f6 | 111 | memcpy(gpsfix_last_utc_time, token, sizeof gpsfix_last_utc_time - 1); |
koziniec | 11:a9c16968e7f6 | 112 | } |
koziniec | 9:b8a60ade343e | 113 | } |
koziniec | 9:b8a60ade343e | 114 | if (token != NULL) { |
koziniec | 9:b8a60ade343e | 115 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 116 | /* if (*token == 'V') { |
koziniec | 10:349d4fa9037f | 117 | pc.printf("VOID"); |
koziniec | 13:ff0b39177386 | 118 | } */ |
koziniec | 13:ff0b39177386 | 119 | } |
koziniec | 12:a895e3581542 | 120 | if (*token == 'A') { //Is this an 'A'ctive (valid) fix? |
koziniec | 10:349d4fa9037f | 121 | pc.printf("Got a fix\n\r"); |
koziniec | 13:ff0b39177386 | 122 | gps_power(OFF); //Yes - No need for GPS now |
koziniec | 13:ff0b39177386 | 123 | blue_led = OFF; |
koziniec | 12:a895e3581542 | 124 | wait_for_fix = false; //Stop looping now we have a fix. |
koziniec | 10:349d4fa9037f | 125 | while (gps.readable()) { |
koziniec | 10:349d4fa9037f | 126 | char dummy = gps.getc(); //Empty serial buffer because overflows reveal MBED bugs :-( |
koziniec | 10:349d4fa9037f | 127 | } |
koziniec | 10:349d4fa9037f | 128 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 129 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 130 | //pc.printf("Latitude: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 131 | memcpy(gpsfix_latitude, token, sizeof gpsfix_latitude - 1); |
koziniec | 10:349d4fa9037f | 132 | } |
koziniec | 10:349d4fa9037f | 133 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 134 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 135 | //pc.printf("North/South: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 136 | gpsfix_ns = *token; |
koziniec | 10:349d4fa9037f | 137 | } |
koziniec | 10:349d4fa9037f | 138 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 139 | token = strtok(NULL, ","); |
koziniec | 12:a895e3581542 | 140 | //pc.printf("Longitude: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 141 | memcpy(gpsfix_longtitude, token, sizeof gpsfix_longtitude - 1); |
koziniec | 10:349d4fa9037f | 142 | } |
koziniec | 10:349d4fa9037f | 143 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 144 | token = strtok(NULL, ","); |
koziniec | 12:a895e3581542 | 145 | //pc.printf("East/West: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 146 | gpsfix_ew = *token; |
koziniec | 10:349d4fa9037f | 147 | } |
koziniec | 10:349d4fa9037f | 148 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 149 | token = strtok(NULL, ","); |
koziniec | 13:ff0b39177386 | 150 | pc.printf("Speed in knots: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 151 | } |
koziniec | 10:349d4fa9037f | 152 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 153 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 154 | //pc.printf("True course: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 155 | } |
koziniec | 10:349d4fa9037f | 156 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 157 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 158 | //pc.printf("Date: %s\n\r",token); |
koziniec | 11:a9c16968e7f6 | 159 | memcpy(gpsfix_last_utc_date, token, sizeof gpsfix_last_utc_date - 1); |
koziniec | 10:349d4fa9037f | 160 | } |
koziniec | 10:349d4fa9037f | 161 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 162 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 163 | //pc.printf("Variation: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 164 | } |
koziniec | 10:349d4fa9037f | 165 | if (token != NULL) { |
koziniec | 10:349d4fa9037f | 166 | token = strtok(NULL, ","); |
koziniec | 11:a9c16968e7f6 | 167 | //pc.printf("Variation East/West: %s\n\r",token); |
koziniec | 10:349d4fa9037f | 168 | } |
koziniec | 10:349d4fa9037f | 169 | } |
koziniec | 9:b8a60ade343e | 170 | } |
koziniec | 8:b4a6c632c809 | 171 | } |
koziniec | 4:e996385ca6d9 | 172 | while (gps.readable()) { |
koziniec | 4:e996385ca6d9 | 173 | char dummy = gps.getc(); |
koziniec | 1:b8cb82927f33 | 174 | } |
koziniec | 1:b8cb82927f33 | 175 | } |
koziniec | 13:ff0b39177386 | 176 | return EXIT_SUCCESS; |
koziniec | 12:a895e3581542 | 177 | } |
koziniec | 1:b8cb82927f33 | 178 | |
koziniec | 13:ff0b39177386 | 179 | main() |
koziniec | 1:b8cb82927f33 | 180 | { |
koziniec | 1:b8cb82927f33 | 181 | char data[2]; |
koziniec | 1:b8cb82927f33 | 182 | data[0] = 0x1A; //MAX14690 BootCfg register |
koziniec | 1:b8cb82927f33 | 183 | data[1] = 0x30; //Always-On Mode, off state via PWR_OFF_CMD |
koziniec | 0:59c04ca89ae2 | 184 | i2c.write( 0x50, data, 2 ); |
koziniec | 0:59c04ca89ae2 | 185 | |
koziniec | 1:b8cb82927f33 | 186 | data[0] = 0x17; //MAX14690 LDO3Vset register |
koziniec | 0:59c04ca89ae2 | 187 | data[1] = 0x19; //3.3V |
koziniec | 0:59c04ca89ae2 | 188 | i2c.write( 0x50, data, 2 ); |
koziniec | 13:ff0b39177386 | 189 | gps_power(OFF); |
koziniec | 6:af25f19eb4e6 | 190 | wait(2); |
koziniec | 13:ff0b39177386 | 191 | pc.printf("\n\n\rOpen EPIRB - Simple mode\n\r"); |
koziniec | 13:ff0b39177386 | 192 | pc.printf("Press and hold both side buttons to signal rescue needed\n\r"); |
koziniec | 13:ff0b39177386 | 193 | pc.printf("Full functionality will start in:"); |
koziniec | 13:ff0b39177386 | 194 | for (int i=9; i > 0; i--) { |
koziniec | 13:ff0b39177386 | 195 | time_t seconds = time(NULL); //get current epoch |
koziniec | 13:ff0b39177386 | 196 | pc.printf("%d",i); |
koziniec | 13:ff0b39177386 | 197 | while(time(NULL) - seconds < 1) { |
koziniec | 13:ff0b39177386 | 198 | if (true/*button_combination()==SOS_PRESSED*/) { |
koziniec | 13:ff0b39177386 | 199 | //do the emergency code |
koziniec | 13:ff0b39177386 | 200 | if (gps_update()==EXIT_SUCCESS) { |
koziniec | 13:ff0b39177386 | 201 | gps_data_present = true; |
koziniec | 13:ff0b39177386 | 202 | int gps_epoch = get_epoch_from_last_gps_time(); |
koziniec | 13:ff0b39177386 | 203 | set_time(gps_epoch); |
koziniec | 13:ff0b39177386 | 204 | pc.printf("Got a GPS fix and time.\n\r"); |
koziniec | 13:ff0b39177386 | 205 | pc.printf("Sending SOS in 10 seconds"); |
koziniec | 13:ff0b39177386 | 206 | green_led=ON; |
koziniec | 13:ff0b39177386 | 207 | } else { |
koziniec | 13:ff0b39177386 | 208 | pc.printf("\n\rGPS timed out and we have no existing fix.\n\r"); |
koziniec | 13:ff0b39177386 | 209 | pc.printf("We can send an Iridium packet but coordinates are rough.\n\r"); |
koziniec | 13:ff0b39177386 | 210 | } |
koziniec | 13:ff0b39177386 | 211 | pc.printf("Sending SOS in 10 seconds"); |
koziniec | 13:ff0b39177386 | 212 | red_led=ON; |
koziniec | 13:ff0b39177386 | 213 | while(true) {}; //STOP HERE |
koziniec | 13:ff0b39177386 | 214 | } |
koziniec | 13:ff0b39177386 | 215 | } |
koziniec | 13:ff0b39177386 | 216 | pc.printf("\b"); //Backspace |
koziniec | 0:59c04ca89ae2 | 217 | } |
koziniec | 13:ff0b39177386 | 218 | // normal functionality lives here |
koziniec | 13:ff0b39177386 | 219 | pc.printf("\n\rStarting normal operation\n\r"); |
koziniec | 13:ff0b39177386 | 220 | /* |
koziniec | 13:ff0b39177386 | 221 | if (true) { //Temp simulation |
koziniec | 13:ff0b39177386 | 222 | while (1) { |
koziniec | 13:ff0b39177386 | 223 | if (gps_update()==EXIT_SUCCESS) { |
koziniec | 13:ff0b39177386 | 224 | gps_data_present = true; |
koziniec | 13:ff0b39177386 | 225 | int gps_epoch = get_epoch_from_last_gps_time(); |
koziniec | 13:ff0b39177386 | 226 | set_time(gps_epoch); |
koziniec | 13:ff0b39177386 | 227 | pc.printf("Got a GPS fix and time.\n\r"); |
koziniec | 13:ff0b39177386 | 228 | } else { |
koziniec | 13:ff0b39177386 | 229 | pc.printf("GPS timed out and we have no existing fix.\n\r"); |
koziniec | 13:ff0b39177386 | 230 | pc.printf("We can send an Iridium packet but coordinates are rough.\n\r"); |
koziniec | 13:ff0b39177386 | 231 | } |
koziniec | 13:ff0b39177386 | 232 | time_t seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 233 | //printf("Time as a basic string = %s", ctime(&seconds)); |
koziniec | 13:ff0b39177386 | 234 | wait(60); |
koziniec | 13:ff0b39177386 | 235 | seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 236 | |
koziniec | 13:ff0b39177386 | 237 | wait(33); |
koziniec | 13:ff0b39177386 | 238 | seconds = time(NULL); |
koziniec | 13:ff0b39177386 | 239 | printf("Time as a basic string = %s", ctime(&seconds)); |
koziniec | 13:ff0b39177386 | 240 | wait(60); |
koziniec | 13:ff0b39177386 | 241 | } */ |
koziniec | 13:ff0b39177386 | 242 | } |
koziniec | 0:59c04ca89ae2 | 243 | |
koziniec | 0:59c04ca89ae2 | 244 | |
koziniec | 7:4218bb385ca4 | 245 | |
koziniec | 7:4218bb385ca4 | 246 | |
koziniec | 7:4218bb385ca4 | 247 | |
koziniec | 0:59c04ca89ae2 | 248 | |
koziniec | 7:4218bb385ca4 | 249 | |
koziniec | 0:59c04ca89ae2 | 250 | |
koziniec | 7:4218bb385ca4 | 251 |