Hello everyone,
I am trying an example of the library "Adafruit_gps" and all i changed in it was comment the parts related to the "softwareserial" library as the arduino im using (Arduino MKR FOX 1200) is not compatible with that library. I am getting the error:
error: expected constructor, destructor, or type conversion before '(' token SIGNAL(TIMER0_COMPA_vect) {
in my code but i am not sure what it means and what i should do. (I am a noob btw)
one more question: in the tutorial it says to connect to ports 2 and 3 but since i cant use "softwareserial" library i connected the GPS to the RX and TX ports instead (13 and 14). Do i need to add anything to the code for it to work or will it automatically detect the ports?
The full code:
// Test code for Adafruit GPS modules using MTK3329/MTK3339 driver
//
// This code just echos whatever is coming from the GPS unit to the
// serial monitor, handy for debugging!
//
// Tested and works great with the Adafruit Ultimate GPS module
// using MTK33x9 chipset
// ------> http://www.adafruit.com/products/746
// Pick one up today at the Adafruit electronics shop
// and help support open source hardware & software! -ada
/*#include <Adafruit_GPS.h>
#if ARDUINO >= 100
#include <SoftwareSerial.h>
#else
// Older Arduino IDE requires NewSoftSerial, download from:
// http://arduiniana.org/libraries/newsoftserial/
// #include <NewSoftSerial.h>
// DO NOT install NewSoftSerial if using Arduino 1.0 or later!
#endif */
// Connect the GPS Power pin to 5V
// Connect the GPS Ground pin to ground
// If using software serial (sketch example default):
// Connect the GPS TX (transmit) pin to Digital 3
// Connect the GPS RX (receive) pin to Digital 2
// If using hardware serial (e.g. Arduino Mega):
// Connect the GPS TX (transmit) pin to Arduino RX1, RX2 or RX3
// Connect the GPS RX (receive) pin to matching TX1, TX2 or TX3
// If using software serial, keep these lines enabled
// (you can change the pin numbers to match your wiring):
/*#if ARDUINO >= 100
SoftwareSerial mySerial(3, 2);
#else
NewSoftSerial mySerial(3, 2);
#endif
Adafruit_GPS GPS(&mySerial);*/
// If using hardware serial (e.g. Arduino Mega), comment
// out the above six lines and enable this line instead:
//Adafruit_GPS GPS(&Serial1);
// Set GPSECHO to 'false' to turn off echoing the GPS data to the Serial console
// Set to 'true' if you want to debug and listen to the raw GPS sentences
#define GPSECHO true
// this keeps track of whether we're using the interrupt
// off by default!
boolean usingInterrupt = false;
void useInterrupt(boolean); // Func prototype keeps Arduino 0023 happy
void setup()
{
// connect at 115200 so we can read the GPS fast enuf and
// also spit it out
Serial.begin(115200);
Serial.println("Adafruit GPS library basic test!");
// 9600 NMEA is the default baud rate for MTK - some use 4800
GPS.begin(9600);
// You can adjust which sentences to have the module emit, below
// uncomment this line to turn on RMC (recommended minimum) and GGA (fix data) including altitude
GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA);
// uncomment this line to turn on only the "minimum recommended" data for high update rates!
//GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCONLY);
// uncomment this line to turn on all the available data - for 9600 baud you'll want 1 Hz rate
//GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_ALLDATA);
// Set the update rate
// Note you must send both commands below to change both the output rate (how often the position
// is written to the serial line), and the position fix rate.
// 1 Hz update rate
//GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ);
//GPS.sendCommand(PMTK_API_SET_FIX_CTL_1HZ);
// 5 Hz update rate- for 9600 baud you'll have to set the output to RMC or RMCGGA only (see above)
GPS.sendCommand(PMTK_SET_NMEA_UPDATE_5HZ);
GPS.sendCommand(PMTK_API_SET_FIX_CTL_5HZ);
// 10 Hz update rate - for 9600 baud you'll have to set the output to RMC only (see above)
// Note the position can only be updated at most 5 times a second so it will lag behind serial output.
//GPS.sendCommand(PMTK_SET_NMEA_UPDATE_10HZ);
//GPS.sendCommand(PMTK_API_SET_FIX_CTL_5HZ);
// Request updates on antenna status, comment out to keep quiet
GPS.sendCommand(PGCMD_ANTENNA);
// the nice thing about this code is you can have a timer0 interrupt go off
// every 1 millisecond, and read data from the GPS for you. that makes the
// loop code a heck of a lot easier!
useInterrupt(true);
delay(1000);
}
// Interrupt is called once a millisecond, looks for any new GPS data, and stores it
SIGNAL(TIMER0_COMPA_vect) {
char c = GPS.read();
// if you want to debug, this is a good time to do it!
if (GPSECHO)
if (c) UDR0 = c;
// writing direct to UDR0 is much much faster than Serial.print
// but only one character can be written at a time.
}
void useInterrupt(boolean v) {
if (v) {
// Timer0 is already used for millis() - we'll just interrupt somewhere
// in the middle and call the "Compare A" function above
OCR0A = 0xAF;
TIMSK0 |= _BV(OCIE0A);
usingInterrupt = true;
} else {
// do not call the interrupt function COMPA anymore
TIMSK0 &= ~_BV(OCIE0A);
usingInterrupt = false;
}
}
void loop() // run over and over again
{
// do nothing! all reading and printing is done in the interrupt
}
Thanks in advance.