protocol/usb_hid/USB_Host_Shield_2.0/examples/pl2303/pl2303_gps/pl2303_gps.ino

   1 /* USB Host to PL2303-based USB GPS unit interface */
   2 /* Navibee GM720 receiver - Sirf Star III */
   3 /* USB support */
   4 #include <usbhub.h>
   5 /* CDC support */
   6 #include <cdcacm.h>
   7 #include <cdcprolific.h>
   8
   9 // Satisfy the IDE, which needs to see the include statment in the ino too.
  10 #ifdef dobogusinclude
  11 #include <spi4teensy3.h>
  12 #include <SPI.h>
  13 #endif
  14
  15 class PLAsyncOper : public CDCAsyncOper {
  16 public:
  17         uint8_t OnInit(ACM *pacm);
  18 };
  19
  20 uint8_t PLAsyncOper::OnInit(ACM *pacm) {
  21         uint8_t rcode;
  22
  23         // Set DTR = 1
  24         rcode = pacm->SetControlLineState(1);
  25
  26         if(rcode) {
  27                 ErrorMessage<uint8_t>(PSTR("SetControlLineState"), rcode);
  28                 return rcode;
  29         }
  30
  31         LINE_CODING lc;
  32         lc.dwDTERate = 4800; //default serial speed of GPS unit
  33         lc.bCharFormat = 0;
  34         lc.bParityType = 0;
  35         lc.bDataBits = 8;
  36
  37         rcode = pacm->SetLineCoding(&lc);
  38
  39         if(rcode)
  40                 ErrorMessage<uint8_t>(PSTR("SetLineCoding"), rcode);
  41
  42         return rcode;
  43 }
  44
  45 USB Usb;
  46 USBHub Hub(&Usb);
  47 PLAsyncOper AsyncOper;
  48 PL2303 Pl(&Usb, &AsyncOper);
  49 uint32_t read_delay;
  50 #define READ_DELAY 100
  51
  52 void setup() {
  53         Serial.begin(115200);
  54 #if !defined(__MIPSEL__)
  55         while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
  56 #endif
  57         Serial.println("Start");
  58
  59         if(Usb.Init() == -1)
  60                 Serial.println("OSCOKIRQ failed to assert");
  61
  62         delay(200);
  63 }
  64
  65 void loop() {
  66         uint8_t rcode;
  67         uint8_t buf[64]; //serial buffer equals Max.packet size of bulk-IN endpoint
  68         uint16_t rcvd = 64;
  69
  70         Usb.Task();
  71
  72         if(Pl.isReady()) {
  73                 /* reading the GPS */
  74                 if((long)(millis() - read_delay) >= 0L) {
  75                         read_delay += READ_DELAY;
  76                         rcode = Pl.RcvData(&rcvd, buf);
  77                         if(rcode && rcode != hrNAK)
  78                                 ErrorMessage<uint8_t>(PSTR("Ret"), rcode);
  79                         if(rcvd) { //more than zero bytes received
  80                                 for(uint16_t i = 0; i < rcvd; i++) {
  81                                         Serial.print((char)buf[i]); //printing on the screen
  82                                 }//for( uint16_t i=0; i < rcvd; i++...
  83                         }//if( rcvd
  84                 }//if( read_delay > millis()...
  85         }//if( Usb.getUsbTaskState() == USB_STATE_RUNNING..
  86 }
  87
  88