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/* USB Host to PL2303-based USB GPS unit interface */
/* Navibee GM720 receiver - Sirf Star III */
/* Mikal Hart's TinyGPS library */
/* test_with_gps_device library example modified for PL2302 access */
/* USB support */
#include <usbhub.h>
/* CDC support */
#include <cdcacm.h>
#include <cdcprolific.h>
#include <TinyGPS.h>
// Satisfy the IDE, which needs to see the include statment in the ino too.
#ifdef dobogusinclude
#include <spi4teensy3.h>
#include <SPI.h>
#endif
/* This sample code demonstrates the normal use of a TinyGPS object.
Modified to be used with USB Host Shield Library r2.0
and USB Host Shield 2.0
*/
class PLAsyncOper : public CDCAsyncOper
{
public:
uint8_t OnInit(ACM *pacm);
};
uint8_t PLAsyncOper::OnInit(ACM *pacm)
{
uint8_t rcode;
// Set DTR = 1
rcode = pacm->SetControlLineState(1);
if (rcode) {
ErrorMessage<uint8_t>(PSTR("SetControlLineState"), rcode);
return rcode;
}
LINE_CODING lc;
lc.dwDTERate = 4800; //default serial speed of GPS unit
lc.bCharFormat = 0;
lc.bParityType = 0;
lc.bDataBits = 8;
rcode = pacm->SetLineCoding(&lc);
if (rcode) {
ErrorMessage<uint8_t>(PSTR("SetLineCoding"), rcode);
}
return rcode;
}
USB Usb;
//USBHub Hub(&Usb);
PLAsyncOper AsyncOper;
PL2303 Pl(&Usb, &AsyncOper);
TinyGPS gps;
void gpsdump(TinyGPS &gps);
bool feedgps();
void printFloat(double f, int digits = 2);
void setup()
{
Serial.begin(115200);
#if !defined(__MIPSEL__)
while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
#endif
Serial.print("Testing TinyGPS library v. "); Serial.println(TinyGPS::library_version());
Serial.println("by Mikal Hart");
Serial.println();
Serial.print("Sizeof(gpsobject) = "); Serial.println(sizeof(TinyGPS));
Serial.println();
/* USB Initialization */
if (Usb.Init() == -1) {
Serial.println("OSCOKIRQ failed to assert");
}
delay( 200 );
}
void loop()
{
Usb.Task();
if( Pl.isReady()) {
bool newdata = false;
unsigned long start = millis();
// Every 5 seconds we print an update
while (millis() - start < 5000) {
if( feedgps()) {
newdata = true;
}
}//while (millis()...
if (newdata) {
Serial.println("Acquired Data");
Serial.println("-------------");
gpsdump(gps);
Serial.println("-------------");
Serial.println();
}//if( newdata...
}//if( Usb.getUsbTaskState() == USB_STATE_RUNNING...
}
void printFloat(double number, int digits)
{
// Handle negative numbers
if (number < 0.0)
{
Serial.print('-');
number = -number;
}
// Round correctly so that print(1.999, 2) prints as "2.00"
double rounding = 0.5;
for (uint8_t i=0; i<digits; ++i)
rounding /= 10.0;
number += rounding;
// Extract the integer part of the number and print it
unsigned long int_part = (unsigned long)number;
double remainder = number - (double)int_part;
Serial.print(int_part);
// Print the decimal point, but only if there are digits beyond
if (digits > 0)
Serial.print(".");
// Extract digits from the remainder one at a time
while (digits-- > 0)
{
remainder *= 10.0;
int toPrint = int(remainder);
Serial.print(toPrint);
remainder -= toPrint;
}
}
void gpsdump(TinyGPS &gps)
{
long lat, lon;
float flat, flon;
unsigned long age, date, time, chars;
int year;
byte month, day, hour, minute, second, hundredths;
unsigned short sentences, failed;
gps.get_position(&lat, &lon, &age);
Serial.print("Lat/Long(10^-5 deg): "); Serial.print(lat); Serial.print(", "); Serial.print(lon);
Serial.print(" Fix age: "); Serial.print(age); Serial.println("ms.");
feedgps(); // If we don't feed the gps during this long routine, we may drop characters and get checksum errors
gps.f_get_position(&flat, &flon, &age);
Serial.print("Lat/Long(float): "); printFloat(flat, 5); Serial.print(", "); printFloat(flon, 5);
Serial.print(" Fix age: "); Serial.print(age); Serial.println("ms.");
feedgps();
gps.get_datetime(&date, &time, &age);
Serial.print("Date(ddmmyy): "); Serial.print(date); Serial.print(" Time(hhmmsscc): "); Serial.print(time);
Serial.print(" Fix age: "); Serial.print(age); Serial.println("ms.");
feedgps();
gps.crack_datetime(&year, &month, &day, &hour, &minute, &second, &hundredths, &age);
Serial.print("Date: "); Serial.print(static_cast<int>(month)); Serial.print("/"); Serial.print(static_cast<int>(day)); Serial.print("/"); Serial.print(year);
Serial.print(" Time: "); Serial.print(static_cast<int>(hour)); Serial.print(":"); Serial.print(static_cast<int>(minute)); Serial.print(":"); Serial.print(static_cast<int>(second)); Serial.print("."); Serial.print(static_cast<int>(hundredths));
Serial.print(" Fix age: "); Serial.print(age); Serial.println("ms.");
feedgps();
Serial.print("Alt(cm): "); Serial.print(gps.altitude()); Serial.print(" Course(10^-2 deg): "); Serial.print(gps.course()); Serial.print(" Speed(10^-2 knots): "); Serial.println(gps.speed());
Serial.print("Alt(float): "); printFloat(gps.f_altitude()); Serial.print(" Course(float): "); printFloat(gps.f_course()); Serial.println();
Serial.print("Speed(knots): "); printFloat(gps.f_speed_knots()); Serial.print(" (mph): "); printFloat(gps.f_speed_mph());
Serial.print(" (mps): "); printFloat(gps.f_speed_mps()); Serial.print(" (kmph): "); printFloat(gps.f_speed_kmph()); Serial.println();
feedgps();
gps.stats(&chars, &sentences, &failed);
Serial.print("Stats: characters: "); Serial.print(chars); Serial.print(" sentences: "); Serial.print(sentences); Serial.print(" failed checksum: "); Serial.println(failed);
}
bool feedgps()
{
uint8_t rcode;
uint8_t buf[64]; //serial buffer equals Max.packet size of bulk-IN endpoint
uint16_t rcvd = 64;
{
/* reading the GPS */
rcode = Pl.RcvData(&rcvd, buf);
if (rcode && rcode != hrNAK)
ErrorMessage<uint8_t>(PSTR("Ret"), rcode);
rcode = false;
if( rcvd ) { //more than zero bytes received
for( uint16_t i=0; i < rcvd; i++ ) {
if( gps.encode((char)buf[i])) { //feed a character to gps object
rcode = true;
}//if( gps.encode(buf[i]...
}//for( uint16_t i=0; i < rcvd; i++...
}//if( rcvd...
}
return( rcode );
}
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