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