C # wince buzzer voice C # Call the device driver Function

Using system;
Using system. Collections. Generic;
Using system. componentmodel;
Using system. Data;
Using system. drawing;
Using system. text;
Using system. Windows. forms;
Using system. runtime. interopservices;
Using system. Threading;

Namespace createfile
{
Unsafe public partial class form1: Form
{
Const uint32 open_existing = 3;
Const uint32 generic_read = 0x80000000;
Const uint32 generic_write = 0x40000000;
Const int32 invalid_handle_value =-1;

Private intptr hport;

// PWM control word, source tq2440/src/Drivers/pwmdriver. h file
Const uint32 ioctl_pwm_set_prescaler = 1;
Const uint32 ioctl_pwm_set_divider = 2;
Const uint32 ioctl_pwm_start = 3;
Const uint32 ioctl_pwm_get_frequency = 4;

[Dllimport ("coredll. dll")]
Public static extern intptr createfile (
String lpfilename,
Uint32 dwdesiredaccess,
Uint32 dwsharemode,
Intptr lpsecurityattributes,
Uint32 dwcreationdisposition,
Uint32 dwflagsandattributes,
Intptr htemplatefile
);
[Dllimport ("coredll. dll")]
Public static extern bool deviceiocontrol (
Intptr hdevice,
Uint32 dwiocontrolcode,
Uint32 [] lpinbuffer,
Uint32 ninbuffersize,
Byte [] lpoutbuffer,
Uint32 noutbuffersize,
Uint32 lpbytesreturned,
Intptr lpoverlapped
);

Public form1 ()
{
Initializecomponent ();
Hport = createfile ("pwm1:", generic_read | generic_write, 0, intptr. Zero, open_existing, 0,

Intptr. Zero );

If (hport = (intptr) invalid_handle_value)
{
MessageBox. Show ("Open PWM driver fail ");
}

}

Private void button#click (Object sender, eventargs E)
{
Uint32 [] buff = new uint32 [3] {0,488,244}; // 488,244 Source
/* Int freq = 800; // initial working frequency value
# Define s3c2440_pclk 50000000 // pclk is 50 MHz
# Define prescaler0 15 // pre-Division
# Define mux0 8 // timer frequency division Value
# Define tcntb0 (s3c2440_pclk/128/freq) // operating frequency
# Define tcmpb0 (tcntb0> 1) // duty cycle. The default value is 50%.

Byte prescale [2] = {0, prescaler0 };
Byte divider [2] = {0, mux0 };
DWORD buff [3] = {0, tcntb0, tcmpb0 };*/
Uint32 [] prescale = new uint32 [2] {0, 15 };
Uint32 [] divider = new uint32 [2] {0, 8 };
// Initialize the hardware
Deviceiocontrol (hport, ioctl_pwm_set_prescaler, prescale, 2, null, 0, 0, intptr. Zero );
Deviceiocontrol (hport, ioctl_pwm_set_divider, divider, 2, null, 0, 0, intptr. Zero );

// Deviceiocontrol (hport, ioctl_pwm_start, buff, 3, null, 0, 0, intptr. Zero );
Thread t = new thread (HH );
Button2.enabled = false;
Timer1.enabled = true;
T. Start ();
While (button2.enabled = false );
T. Abort ();
}
Public void HH ()
{
Uint32 [] buff = new uint32 [3] {0,488,244}; // 488,244 Source
Deviceiocontrol (hport, ioctl_pwm_start, buff, 3, null, 0, 0, intptr. Zero );
}

Private void timereffectick (Object sender, eventargs E)
{
Button2.enabled = true;
}
}
}