//here we send a ping to the keyboard driver
void Ping()
{
var KeyboardData = new SetFeatureKeyboard();
KeyboardData.ReportID = 1;
KeyboardData.CommandCode = 3;
//the timeout is how long the driver will wait (milliseconds) without receiving a ping before resetting itself
//we'll be pinging every 200ms, and loss of ping will cause driver reset in FTimeout.
//No more stuck keys requiring reboot to clear.
//the following fields are not used by the driver for a ping, but we'll zero them anyways
KeyboardData.Timeout = FTimeout / 5; //50 because we count in blocks of 50 in the driver;
KeyboardData.Modifier = 0;
KeyboardData.Padding = 0;
KeyboardData.Key0 = 0;
KeyboardData.Key1 = 0;
KeyboardData.Key2 = 0;
KeyboardData.Key3 = 0;
KeyboardData.Key4 = 0;
KeyboardData.Key5 = 0;
//convert struct to buffer
var buf = getBytesSFJ(KeyboardData, Marshal.SizeOf(KeyboardData));
//send filled buffer to driver
HID.SendData(buf, (uint)Marshal.SizeOf(KeyboardData));
}
private bool KeysPress(byte Modifier, byte Key0, byte Key1, byte Key2, byte Key3, byte Key4, byte Key5)
{
try
{
//Set feature data
SetFeatureKeyboard featureData = new SetFeatureKeyboard();
featureData.ReportID = 1;
featureData.CommandCode = 2;
featureData.Timeout = 1000;
featureData.Modifier = Modifier;
featureData.Key0 = Key0;
featureData.Key1 = Key1;
featureData.Key2 = Key2;
featureData.Key3 = Key3;
featureData.Key4 = Key4;
featureData.Key5 = Key5;
//Convert to byte array
int featureSize = Marshal.SizeOf(featureData);
byte[] featureArray = new byte[featureSize];
IntPtr featureIntPtr = Marshal.AllocHGlobal(featureSize);
Marshal.StructureToPtr(featureData, featureIntPtr, false);
Marshal.Copy(featureIntPtr, featureArray, 0, featureSize);
Marshal.FreeHGlobal(featureIntPtr);
//Send byte array to driver
return(SetFeature(FileHandle, featureArray));
}
catch
{
Debug.WriteLine("Failed to press tether keys.");
return(false);
}
}
private bool KeysRelease()
{
try
{
//Set feature data
SetFeatureKeyboard featureData = new SetFeatureKeyboard();
featureData.ReportID = 1;
featureData.CommandCode = 2;
featureData.Timeout = 1000;
//Convert to byte array
int featureSize = Marshal.SizeOf(featureData);
byte[] featureArray = new byte[featureSize];
IntPtr featureIntPtr = Marshal.AllocHGlobal(featureSize);
Marshal.StructureToPtr(featureData, featureIntPtr, false);
Marshal.Copy(featureIntPtr, featureArray, 0, featureSize);
Marshal.FreeHGlobal(featureIntPtr);
//Send byte array to driver
return(SetFeature(FileHandle, featureArray));
}
catch
{
Debug.WriteLine("Failed to release tether keys.");
return(false);
}
}
//for converting a struct to byte array
public static byte[] getBytesSFJ(SetFeatureKeyboard sfj, int size)
{
var arr = new byte[size];
var ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(sfj, ptr, false);
Marshal.Copy(ptr, arr, 0, size);
Marshal.FreeHGlobal(ptr);
return(arr);
}
//here we send data to the keyboard driver
void Send(Byte Modifier, Byte Padding, Byte Key0, Byte Key1, Byte Key2, Byte Key3, Byte Key4, Byte Key5)
{
SetFeatureKeyboard KeyboardData = new SetFeatureKeyboard();
KeyboardData.ReportID = 1;
KeyboardData.CommandCode = 2;
KeyboardData.Timeout = FTimeout / 5; //5 because we count in blocks of 5 in the driver
KeyboardData.Modifier = Modifier;
//padding should always be zero.
KeyboardData.Padding = Padding;
KeyboardData.Key0 = Key0;
KeyboardData.Key1 = Key1;
KeyboardData.Key2 = Key2;
KeyboardData.Key3 = Key3;
KeyboardData.Key4 = Key4;
KeyboardData.Key5 = Key5;
//convert struct to buffer
byte[] buf = getBytesSFJ(KeyboardData, Marshal.SizeOf(KeyboardData));
//send filled buffer to driver
HID.SendData(buf, (uint)Marshal.SizeOf(KeyboardData));
}
