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/* USB Host to PL2303-based USB GPS unit interface */
/* Navibee GM720 receiver - Sirf Star III */
/* USB support */
#include <usbhub.h>
/* CDC support */
#include <cdcacm.h>
#include <cdcprolific.h>
// Satisfy the IDE, which needs to see the include statment in the ino too.
#ifdef dobogusinclude
#include <spi4teensy3.h>
#include <SPI.h>
#endif
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);
uint32_t read_delay;
#define READ_DELAY 100
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.println("Start");
if(Usb.Init() == -1)
Serial.println("OSCOKIRQ failed to assert");
delay(200);
}
void loop() {
uint8_t rcode;
uint8_t buf[64]; //serial buffer equals Max.packet size of bulk-IN endpoint
uint16_t rcvd = 64;
Usb.Task();
if(Pl.isReady()) {
/* reading the GPS */
if((long)(millis() - read_delay) >= 0L) {
read_delay += READ_DELAY;
rcode = Pl.RcvData(&rcvd, buf);
if(rcode && rcode != hrNAK)
ErrorMessage<uint8_t>(PSTR("Ret"), rcode);
if(rcvd) { //more than zero bytes received
for(uint16_t i = 0; i < rcvd; i++) {
Serial.print((char)buf[i]); //printing on the screen
}//for( uint16_t i=0; i < rcvd; i++...
}//if( rcvd
}//if( read_delay > millis()...
}//if( Usb.getUsbTaskState() == USB_STATE_RUNNING..
}
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