#include "stdafx.h"
#include "UsbIF.h"
#include <winioctl.h>
#include "ioctls.h"
#include <objbase.h>
#include <initguid.h>		// Required for GUID definition

// GetProductString() function flags
#define		F32x_RETURN_SERIAL_NUMBER	0x00
#define		F32x_RETURN_DESCRIPTION		0x01

// Return codes
#define		F32x_SUCCESS				0x00
#define		F32x_DEVICE_NOT_FOUND		0xFF
#define		F32x_INVALID_HANDLE			0x01
#define		F32x_READ_ERROR				0x02
#define		F32x_RX_QUEUE_NOT_READY		0x03
#define		F32x_WRITE_ERROR			0x04
#define		F32x_RESET_ERROR			0x05
#define		F32x_INVALID_PARAMETER		0x06
#define		F32x_INVALID_REQUEST_LENGTH	0x07
#define		F32x_DEVICE_IO_FAILED		0x08

// RX Queue status flags
#define		F32x_RX_NO_OVERRUN			0x00
#define		F32x_RX_OVERRUN				0x01
#define		F32x_RX_READY				0x02

// Buffer size limits
#define		F32x_MAX_DEVICE_STRLEN		256
#define		F32x_MAX_READ_SIZE			4096
#define		F32x_MAX_WRITE_SIZE			4096

// Type definitions
typedef		int		F32x_STATUS;
typedef		char	F32x_DEVICE_STRING[F32x_MAX_DEVICE_STRLEN];


F32x_STATUS F32x_GetNumDevices(
	LPDWORD lpdwNumDevices
	);

F32x_STATUS F32x_GetProductString(
	DWORD dwDeviceNum,
	LPVOID lpvDeviceString,
	DWORD dwFlags
	);

F32x_STATUS F32x_Open(
	DWORD dwDevice,
	HANDLE* cyHandle
	); 

F32x_STATUS F32x_Close(
	HANDLE cyHandle
	);

F32x_STATUS F32x_Read(
	HANDLE cyHandle,
	LPVOID lpBuffer,
	DWORD dwBytesToRead,
	LPDWORD lpdwBytesReturned
	);

F32x_STATUS F32x_Write(
	HANDLE cyHandle,
	LPVOID lpBuffer,
	DWORD dwBytesToWrite,
	LPDWORD lpdwBytesWritten
	);

// DLL globals
static CUsbIF	sgCUsbIF;
static DWORD	sgdwNumDevices = 0;
static DWORD	sgdwWriteTimeout = 0;
static DWORD	sgdwReadTimeout = 0;

// Private functions
static BOOL ValidParam(LPDWORD lpdwPointer);
static BOOL ValidParam(LPVOID lpVoidPointer);
static BOOL ValidParam(LPVOID lpVoidPointer, LPDWORD lpdwPointer);
static BOOL ValidParam(LPDWORD lpdwPointer1, LPDWORD lpdwPointer2);
static BOOL ValidParam(HANDLE* lpHandle);