code compiles for Arduino Uno but multiple errors for Teensy 3.2

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clayborne

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I found a neat little GPS device that someone graciously shared the code and enough pictures to complete a build on your own. The code compiles with on issues when the board selected is Arduino/ Guenuino uno or pretty much every other board with Arduino in front of it. I was wondering if you nice people could look at the code and give me some guidance. I have a GPS module and OLED on the way that at this point seem they may be useless.

// Code for Adafruit GPS modules using MTK3329/MTK3339 driver
//
// This code shows how to listen to the GPS module in an interrupt
// which allows the program to have more 'freedom' - just parse
// when a new NMEA sentence is available! Then access data when
// desired.
//
// 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
//
// Also pick up an OLED Display at the Adafruit sore!
// ------> http://www.adafruit.com/products/661
// Sketch by Jeremy Saglimbeni - 07/14/12
// ------> http://thecustomgeek.com/2012/07/15/really-smalls-gps/
#define OLED_DC 4
#define OLED_CS 2
#define OLED_CLK 5
#define OLED_MOSI 6 // or "data" on the SSD1306
#define OLED_RESET 3
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display(OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
#define LOGO16_GLCD_HEIGHT 16
#define LOGO16_GLCD_WIDTH 16
#include <Adafruit_GPS.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(8, 9); // soft serial on pins 8 & 9
#define GPSECHO true
Adafruit_GPS GPS(&mySerial);
boolean usingInterrupt = false;
int mode = 0; // used to select what screen we draw
int left = A5; // left or top button
int mid = A3; // middle button
int right = A4; // right or bottom button
int power = 0; // power flag
int tzhour; // time zone adjusted hour
int tzday; // time zone adjusted day
int fixflag = 0; // if the GPS has a fix or not
int timezone = 5; // enter the time zone! (EST = 5);
int dst = 1; // Is it daylight savings time? 0 for no, 1 for yes.
float maxspeed;
float maxalt;

void setup() {
if (dst == 1) {
timezone--;
}
pinMode(13, OUTPUT); // LED for button presses
pinMode(A0, OUTPUT); // connected to the GPS "enabled" pin
digitalWrite(A0, HIGH); // pull it high! Low is sleep
pinMode(7, OUTPUT); // This is connected to the VIN of the OLED screen
digitalWrite(7, HIGH); // turn the screen on!
pinMode(left, INPUT);
pinMode(mid, INPUT);
pinMode(right, INPUT);
digitalWrite(left, HIGH);
digitalWrite(mid, HIGH);
digitalWrite(right, HIGH);
display.begin(SSD1306_SWITCHCAPVCC);
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println(" Where am I anyway?");
display.println(" ");
display.println(" Jeremy Saglimbeni");
display.print(" thecustomgeek.com");
display.display();
delay(1000);
display.clearDisplay();
GPS.begin(9600);
GPS.sendCommand(PMTK_SET_NMEA_OUTPUT_RMCGGA);
GPS.sendCommand(PMTK_SET_NMEA_UPDATE_1HZ); // 1 Hz update rate
useInterrupt(true);
delay(1000);
}

SIGNAL(TIMER0_COMPA_vect) {
char c = GPS.read();
if (GPSECHO)
if (c) UDR0 = c;
}

void useInterrupt(boolean v) {
if (v) {
OCR0A = 0xAF;
TIMSK0 |= _BV(OCIE0A);
usingInterrupt = true;
}
else {
TIMSK0 &= ~_BV(OCIE0A);
usingInterrupt = false;
}
}

uint32_t timer = millis();

void loop() {
if (digitalRead(mid) == LOW) {
if (mode == 7) {
maxspeed = GPS.speed * 1.150779;
}
if (mode == 8) {
maxalt = GPS.altitude;
}
if (mode == 9) {
power++;
if (power == 2) {
power = 0;
}
if (power == 0) {
digitalWrite(A0, HIGH);
digitalWrite(7, HIGH);
digitalWrite(13, HIGH);
display.begin(SSD1306_SWITCHCAPVCC);
display.clearDisplay();
display.setTextSize(2);
display.setCursor(0, 8);
display.setTextColor(WHITE);
display.print("I'm Awake!");
display.display();
delay(1500);
digitalWrite(13, LOW);
display.clearDisplay();
mode = 0;
}
if (power == 1) {
display.clearDisplay();
display.setTextSize(2);
display.setCursor(0, 8);
display.setTextColor(WHITE);
display.print("Goodnight!");
display.display();
delay(1500);
digitalWrite(A0, LOW);
digitalWrite(7, LOW);
}
delay(250);
}
}

if (digitalRead(left) == LOW) {
if (mode == 9) {
return;
}
mode++;
if (mode == 9) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,8);
display.print("Sleep Mode");
display.display();
delay(1000);
return;
}
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,8);
display.print(" Mode ");
display.print(mode);
display.display();
digitalWrite(13, HIGH);
delay(500);
digitalWrite(13, LOW);
display.clearDisplay();
}
if (digitalRead(right) == LOW) {
if (power == 1) {
return;
}
if (mode == 0) {
return;
}
mode--;
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,8);
display.print(" Mode ");
display.print(mode);
display.display();
digitalWrite(13, HIGH);
delay(500);
digitalWrite(13, LOW);
display.clearDisplay();
}

if (! usingInterrupt) {
char c = GPS.read();
if (GPSECHO)
if (c) UDR0 = c;
}

if (GPS.newNMEAreceived()) {

if (!GPS.parse(GPS.lastNMEA()))
return;
}

if (timer > millis()) timer = millis();
if ((GPS.speed * 1.150779) > maxspeed) {
maxspeed = GPS.speed * 1.150779;
}
if (GPS.altitude > maxalt) {
maxalt = GPS.altitude;
}

if (millis() - timer > 500) {
timer = millis(); // reset the timer

if (mode == 0) {
display.fillRect(0, 0, 127, 8, BLACK);
display.setCursor(0, 0);
display.setTextSize(1);
if (GPS.hour >= 0 && GPS.hour < timezone) {
tzhour = GPS.hour + 20;
}
else {
tzhour = GPS.hour - timezone;
}
if (tzhour < 10) {
display.print("0");
}
display.print(tzhour, DEC);
display.print(':');
if (GPS.minute < 10) {
display.print("0");
}
display.print(GPS.minute, DEC);
display.print(':');
if (GPS.seconds < 10) {
display.print("0");
}
display.print(GPS.seconds, DEC);

display.print(" ");
if (GPS.month < 10) {
display.print("0");
}
display.print(GPS.month, DEC);
display.print("/");
if (tzhour >= 20) {
tzday = GPS.day - 1;
}
else {
tzday = GPS.day;
}
if (tzday < 10) {
display.print("0");
}
display.print(tzday, DEC);
display.print("/");
display.print("20");
display.print(GPS.year, DEC);
display.display();

if (GPS.fix == 0) {
display.fillRect(0, 16, 127, 16, BLACK);
display.setTextSize(1);
display.setCursor(0, 16);
display.print("Acquiring Satellites!");
}
if (GPS.fix) {
fixflag = 1;
display.fillRect(0, 8, 128, 24, BLACK);
display.setCursor(0, 8);
display.print("Lat:");
display.print(GPS.lat);
display.print(GPS.latitude, 4);
display.setCursor(0, 16);
display.print("Lon:");
display.print(GPS.lon);
display.print(GPS.longitude, 4);
display.setCursor(0, 24);
display.print("Alt:");
display.print(GPS.altitude * 3.28084);
display.setCursor(92, 24);
if (GPS.fix == 1) {
display.print("Fix:");
display.print(GPS.satellites);
}
if (GPS.fix == 0) {
display.setTextColor(BLACK, WHITE);
display.print("NO FIX");
display.setTextColor(WHITE);
}
}
display.display();
}

if (mode == 1) {
display.clearDisplay();
display.setCursor(0, 0);
display.setTextSize(1);
if (GPS.fix) {
display.setTextSize(1);
display.setCursor(0, 0);
display.print("Lat:");
display.print(GPS.lat);
display.print(GPS.latitude, 4);
display.setCursor(0, 8);
display.print("Lon:");
display.print(GPS.lon);
display.print(GPS.longitude, 4);
display.setCursor(0, 16);
display.print("Speed(MPH):");
display.print(GPS.speed * 1.150779); //*converts to MPH
display.setCursor(0, 24);
display.print("Bearing:");
display.print(GPS.angle);
display.setCursor(90, 24);
display.print("Fix:");
display.print(GPS.satellites);
}
display.display();
}

if (mode == 3) {
display.clearDisplay();
display.setTextSize(4);
display.setTextColor(WHITE);
display.setCursor(0,0);
if (GPS.hour >= 0 && GPS.hour < timezone) {
tzhour = GPS.hour + 20;
}
else {
tzhour = GPS.hour - timezone;
}
if (tzhour < 10) {
display.print("0");
}
display.print(tzhour, DEC);
display.print(':');
if (GPS.minute < 10) {
display.print("0");
}
display.print(GPS.minute, DEC);
display.display();
}
if (mode == 2) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
if (GPS.hour >= 0 && GPS.hour < timezone) {
tzhour = GPS.hour + 20;
}
else {
tzhour = GPS.hour - timezone;
}
if (tzhour < 10) {
display.print("0");
}
display.print(tzhour, DEC);
display.print(':');
if (GPS.minute < 10) {
display.print("0");
}
display.print(GPS.minute, DEC);
display.print(":");
if (GPS.seconds < 10) {
display.print("0");
}
display.print(GPS.seconds, DEC);
display.setCursor(0, 16);
if (GPS.month < 10) {
display.print("0");
}
display.print(GPS.month, DEC);
display.print("/");
if (tzhour >= 20) {
tzday = GPS.day - 1;
}
else {
tzday = GPS.day;
}
if (tzday < 10) {
display.print("0");
}
display.print(tzday, DEC);
display.print("/");
display.print("20");
display.print(GPS.year, DEC);
display.display();
}

if (mode == 4) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print(GPS.speed * 1.150779);
display.print(" MPH");
display.setCursor(0, 16);
display.print(GPS.angle);
display.print(" DEG");
display.display();
}
if (mode == 9) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print("Power Down");
display.setCursor(0, 16);
display.print(" Really?");
display.display();
}
if (mode == 5) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print(GPS.speed * 1.150779);
display.print(" MPH");
display.setCursor(0, 16);
display.print(GPS.altitude * 3.28084);
display.print("Ft");
display.display();
}

if (mode == 7) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print("Max Speed");
display.setCursor(0, 16);
display.print(maxspeed);
display.print("MPH");
display.display();
}
if (mode == 8) {
display.clearDisplay();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.print("Max Alt-Ft");
display.setCursor(0, 16);
display.print(maxalt);
display.display();
}
if (mode == 6) {
display.clearDisplay();
display.setCursor(0, 0);
display.setTextSize(1);
display.setTextSize(1);
display.setCursor(0, 0);
if (GPS.hour >= 0 && GPS.hour < timezone) {
tzhour = GPS.hour + 20;
}
else {
tzhour = GPS.hour - timezone;
}
if (tzhour < 10) {
display.print("0");
}
display.print(tzhour, DEC);
display.print(':');
if (GPS.minute < 10) {
display.print("0");
}
display.print(GPS.minute, DEC);
display.print(':');
if (GPS.seconds < 10) {
display.print("0");
}
display.print(GPS.seconds, DEC);

display.print(" ");
if (GPS.month < 10) {
display.print("0");
}
display.print(GPS.month, DEC);
display.print("/");
if (tzhour >= 20) {
tzday = GPS.day - 1;
}
else {
tzday = GPS.day;
}
if (tzday < 10) {
display.print("0");
}
display.print(tzday, DEC);
display.print("/");
display.print("20");
display.print(GPS.year, DEC);
display.setCursor(0, 8);
display.print("Speed(MPH):");
display.print(GPS.speed * 1.150779); //*converts to MPH
display.setCursor(0, 16);
display.print("Alt:");
display.print(GPS.altitude * 3.28084);
display.setCursor(0, 24);
display.print("Bearing:");
display.print(GPS.angle);
display.setCursor(90, 24);
display.print("Fix:");
display.print(GPS.satellites);
}
/*
else {
display.fillRect(0, 16, 127, 16, BLACK);
display.setTextSize(1);
display.setCursor(0, 16);
display.print("Acquiring Satellites!");
}
*/
display.display();
}
}
 
Hi and welcome:

Wish the code was in code blocks, but...

The code is somewhat specific to some of the Arduinos, but probably would not be much of a problem to convert it to run on a Teensy.

For example the code uses SoftwareSerial, which for the most part is not fully supported on the Teensy. However the Teensy 3.2 has 3 hardware Serial ports plus the USB hardware port.

So you should hopefully easily just remove the usage of the SoftwareSerial port and choose one of the hardware ports and change the code to use one of the hardware ports like Serial1 or Serial2 or Serial3.

It looks like it is setting up to use a Timer including interrupt directly. It should not be hard to convert to some of the libraries instead like IntervalTimer, or maybe Timer1...

Good luck
 
Is this program entirely your creation? Or is it from something published on github or Adafruit's site? I ask because I'd really like to get the original source updated (if there is some official source), once we figure out how to get it working....
 
Oh no outside of some C++ in college (many years ago) I am a total programming newbie. This project came from http://thecustomgeek.com/2012/07/15/really-smalls-gps/ from his GITHUB repository https://github.com/jersagfast/GPS-Smalls. The main board for the project was made by him I beleive, and is no longer being produced, so I was hoping that it would complie for the teensy 3.2. If by posting someone else's code I have some how violated forum rules I appologize
 
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