mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
90 lines
2.1 KiB
C++
90 lines
2.1 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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/* 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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// Satisfy IDE, which only needs to see the include statment in the ino.
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#ifdef dobogusinclude
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#include <spi4teensy3.h>
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#endif
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class PLAsyncOper : public CDCAsyncOper
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{
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public:
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virtual 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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{
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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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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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uint32_t read_delay;
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#define READ_DELAY 100
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void setup()
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{
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Serial.begin( 115200 );
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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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Serial.println("Start");
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if (Usb.Init() == -1)
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Serial.println("OSCOKIRQ failed to assert");
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delay( 200 );
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}
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void loop()
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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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Usb.Task();
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if( Pl.isReady()) {
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/* reading the GPS */
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if( read_delay < millis() ){
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read_delay += READ_DELAY;
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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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if( rcvd ) { //more than zero bytes received
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for( uint16_t i=0; i < rcvd; i++ ) {
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Serial.print((char)buf[i]); //printing on the screen
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}//for( uint16_t i=0; i < rcvd; i++...
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}//if( rcvd
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}//if( read_delay > millis()...
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}//if( Usb.getUsbTaskState() == USB_STATE_RUNNING..
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}
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