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HidDevice.cpp
author StephaneLenclud
Mon, 22 Sep 2014 22:03:28 +0200
changeset 23 e63ba12d7a18
parent 0 0f874d9e4130
child 35 638eb0763e20
permissions -rw-r--r--
HTPC documentation and optimization for GP1212A02. 
     1 //

     2 //

     3 //

     4 

     5 #include "HidDevice.h"

     6 

     7 

     8 

     9 //

    10 // class HidDevice

    11 //

    12 

    13 HidDevice::HidDevice():iHidDevice(NULL)

    14     {

    15     Close();

    16     }

    17 

    18 /**

    19 */

    20 HidDevice::~HidDevice()

    21 	{

    22 	Close();

    23 	}

    24 

    25 

    26 /**

    27 */

    28 int HidDevice::Open(const char* aPath)

    29 	{

    30 	Close();

    31 

    32 	iHidDevice =  hid_open_path(aPath);

    33 

    34 	if (!iHidDevice)

    35 		{

    36 		//Fail to connect our device

    37 		return 0;

    38 		}

    39 

    40     FetchStrings();

    41 

    42 	return 1;

    43 	}

    44 

    45 /**

    46 See hidapi documentation.

    47 */

    48 int HidDevice::Open(unsigned short aVendorId, unsigned short aProductId, const wchar_t* aSerialNumber)

    49 	{

    50     Close();

    51 

    52 	iHidDevice = hid_open(aVendorId, aProductId, aSerialNumber);

    53 

    54 	if (!iHidDevice)

    55 		{

    56 		//Fail to connect our device

    57 		return 0;

    58 		}

    59 

    60     FetchStrings();

    61 

    62 	return 1;

    63 	}

    64 

    65 /**

    66 Close this HID device

    67 */

    68 void HidDevice::Close()

    69 	{

    70 	hid_close(iHidDevice); //No effect if device is null

    71 	iHidDevice=NULL;

    72     //

    73     memset(iVendor,0,sizeof(iVendor));

    74     memset(iProduct,0,sizeof(iProduct));

    75     memset(iSerialNumber,0,sizeof(iSerialNumber));

    76 	}

    77 

    78 /**

    79 */

    80 bool HidDevice::IsOpen()

    81     {

    82     return iHidDevice!=NULL;

    83     }

    84 

    85 

    86 /**

    87 */

    88 const wchar_t* HidDevice::Error()

    89 	{

    90 	return hid_error(iHidDevice);

    91 	}

    92 

    93 /**

    94 */

    95 int HidDevice::SetNonBlocking(int aNonBlocking)

    96 	{

    97 	//Success we are now connected to our HID device

    98 	//Set read operation as non blocking

    99 	return hid_set_nonblocking(iHidDevice, aNonBlocking);

   100 	}

   101 

   102 /**

   103 */

   104 wchar_t* HidDevice::Vendor()

   105     {

   106     return iVendor;

   107     }

   108 

   109 /**

   110 */

   111 wchar_t* HidDevice::Product()

   112     {

   113     return iProduct;

   114     }

   115 

   116 /**

   117 */

   118 wchar_t* HidDevice::SerialNumber()

   119     {

   120     return iSerialNumber;

   121     }

   122 

   123 /**

   124 

   125 */

   126 void HidDevice::FetchStrings()

   127     {

   128     hid_get_manufacturer_string(iHidDevice,iVendor,sizeof(iVendor));

   129     hid_get_product_string(iHidDevice,iProduct,sizeof(iProduct));

   130     hid_get_serial_number_string(iHidDevice,iSerialNumber,sizeof(iSerialNumber));

   131     }
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