#include <windows.h>
#include <stdio.h>

// Simply place the completed tuning interface DLL into the tuner directory.  PVS will automatically
// enumerate and list the interface on a restart of the application.

// Use any or all of the following info to tune the device.
// dwChanne: Channel number
// dwBroadcastType: 0 = Antenna, 1 = Cable
// dwFrequency = The frequency to tune to, in Hz

typedef struct {
	DWORD	dwVersionSpec;				// The current version of the tuning DLL spec is 2.

	DWORD	dwVersion;					// You may put your own internal version number here.
	char	szName[MAX_PATH];			// Name of the device(s) being tuned
	char	szDescription[MAX_PATH];	// Description of the tuning DLL
	char	szFilename[MAX_PATH];		// Don't pass back or modify this field
} TTUNER;

/*	This function is called by the PVS to obtain information about this tuning interface
 */

int TunerGetProperties( TTUNER *pTuner ) {

	pTuner->dwVersionSpec = 2;
	pTuner->dwVersion = 1;
	strcpy( pTuner->szName, "New RCA DSS tuner" );
	strcpy( pTuner->szDescription, "For Receivers using the new serial commands." );

	return TRUE;
}


BOOL SetTunerFrequency(DWORD dwChannel, DWORD dwBroadcastType, DWORD dwFrequency) {
	
	// Do your tuning here!

	HANDLE h;
	DCB dcb;
	char chWrite[10] = "";
	DWORD dwWrite;

	memset(&dcb, 0, sizeof(dcb));
	
	dcb.DCBlength = sizeof(dcb);
	dcb.BaudRate = 9600;
	dcb.fBinary = 1;
	dcb.fOutxCtsFlow = 0;
	dcb.XoffChar = 0;
	dcb.fOutxDsrFlow = 0;
	dcb.fDtrControl = 0;
	dcb.fRtsControl = 0;
	dcb.Parity = NOPARITY;
	dcb.StopBits = ONESTOPBIT;
	dcb.ByteSize = 8;
	dcb.fNull = 0;

	h = CreateFile("COM1", GENERIC_READ|GENERIC_WRITE,0,0, OPEN_EXISTING,0,NULL);

	SetCommState(h,&dcb);
	chWrite[0] = 0xFA;	//Header Command
	chWrite[1] = 0x82;	//Power On Command
	WriteFile(h, &chWrite, 2, &dwWrite, NULL);
	chWrite[0] = 0xFA;	//Header Command
	chWrite[1] = 0xA6;	//Set Channel Command
	chWrite[2] = dwChannel >> 8;  //high byte of dwChannel
	chWrite[3] = dwChannel;	//low byte of dwChannel
	chWrite[4] = 0xff;	//Subchannel
	chWrite[5] = 0xff;	//Subchannel
	Sleep(500);
	WriteFile(h, &chWrite, 6, &dwWrite, NULL);



	CloseHandle(h);

	return TRUE;
}