110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
// Test code for Adafruit GPS modules using MTK3329/MTK3339 driver
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//
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// This code erases the LOCUS built-in datalogger storage
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//
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// Tested and works great with the Adafruit Ultimate GPS module
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// using MTK33x9 chipset
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// ------> http://www.adafruit.com/products/746
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// Pick one up today at the Adafruit electronics shop
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// and help support open source hardware & software! -ada
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//This code is intended for use with Arduino Leonardo and other ATmega32U4-based Arduinos
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#include <Adafruit_GPS.h>
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#include <SoftwareSerial.h>
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// Connect the GPS Power pin to 5V
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// Connect the GPS Ground pin to ground
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// If using software serial (sketch example default):
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// Connect the GPS TX (transmit) pin to Digital 8
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// Connect the GPS RX (receive) pin to Digital 7
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// If using hardware serial:
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// Connect the GPS TX (transmit) pin to Arduino RX1 (Digital 0)
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// Connect the GPS RX (receive) pin to matching TX1 (Digital 1)
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// If using software serial, keep these lines enabled
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// (you can change the pin numbers to match your wiring):
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//SoftwareSerial mySerial(8, 7);
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//Adafruit_GPS GPS(&mySerial);
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// If using hardware serial, comment
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// out the above two lines and enable these two lines instead:
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Adafruit_GPS GPS(&Serial1);
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HardwareSerial mySerial = Serial1;
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// Set GPSECHO to 'false' to turn off echoing the GPS data to the Serial console
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// Set to 'true' if you want to debug and listen to the raw GPS sentences
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#define GPSECHO false
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// this keeps track of whether we're using the interrupt
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// off by default!
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boolean usingInterrupt = false;
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void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy
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void setup()
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{
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while (!Serial) ; //wait for serial port on Leonardo
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// connect at 115200 so we can read the GPS fast enuf and
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// also spit it out
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Serial.begin(115200);
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Serial.println("Adafruit GPS erase FLASH!");
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// 9600 NMEA is the default baud rate for MTK
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GPS.begin(9600);
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GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_OFF);
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// the nice thing about this code is you can have a timer0 interrupt go off
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// every 1 millisecond, and read data from the GPS for you. that makes the
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// loop code a heck of a lot easier!
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useInterrupt(true);
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Serial.println("This code will ERASE the data log stored in the FLASH - Permanently!");
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Serial.print("Are you sure you want to do this? [Y/N]: ");
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while (Serial.read() != 'Y') delay(10);
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Serial.println("\nERASING! UNPLUG YOUR ARDUINO WITHIN 5 SECONDS IF YOU DIDNT MEAN TO!");
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delay(5000);
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GPS.sendCommand(PMTK_LOCUS_ERASE_FLASH);
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Serial.println("Erased");
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}
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void loop() // run over and over again
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{
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if (mySerial.available()) {
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Serial.write(mySerial.read());
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}
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}
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/******************************************************************/
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// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
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SIGNAL(TIMER0_COMPA_vect) {
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char c = GPS.read();
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// if you want to debug, this is a good time to do it!
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if (GPSECHO && c) {
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#ifdef UDR0
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UDR0 = c;
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// writing direct to UDR0 is much much faster than Serial.print
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// but only one character can be written at a time.
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#else
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Serial.write(c);
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#endif
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}
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}
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void useInterrupt(boolean v) {
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if (v) {
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// Timer0 is already used for millis() - we'll just interrupt somewhere
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// in the middle and call the "Compare A" function above
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OCR0A = 0xAF;
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TIMSK0 |= _BV(OCIE0A);
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usingInterrupt = true;
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} else {
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// do not call the interrupt function COMPA anymore
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TIMSK0 &= ~_BV(OCIE0A);
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usingInterrupt = false;
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}
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}
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