// this function is called directly by the driver whenever data is ready
// there is an anomaly in the (current version of the) Data Translation driver
// that causes this function to be called unevenly spaced in time
// this only happens under certain circumstances (i.e., number of channels,
// SampleBlockSize, and sampling frequency)
// see corresponding description in BCI2000 documentation
__stdcall BufferDone( UINT uiMsg, unsigned int Dass, LPARAM lParam )
{
ECODE status;
int arrays;
int i;
short *buffer;
HBUF hBuf;
LPHBUF lphBuf;
ULNG samples;
HDASS lphDass;
hBuf= NULL;
lphBuf= NULL;
lphDass= (void *)Dass;
status= olDaGetBuffer(lphDass, &hBuf);
if ( hBuf != NULL )
{
status= olDmGetMaxSamples(hBuf,&samples);
status= olDmGetBufferPtr( hBuf, (LPVOID FAR*)&lphBuf );
status= olDaPutBuffer(lphDass, hBuf);
buffer= (short *)lphBuf;
((DTFUN *)(lParam))->data_critsec->Acquire();
((DTFUN *)(lParam))->Add_to_data( buffer, samples ); // add data to FIFO
((DTFUN *)(lParam))->data_critsec->Release();
}
// notify ADReadDataBlock() that data is here
((DTFUN *)(lParam))->bdone->SetEvent();
return(0);
}
void COctopusAOTF::GenerateSignal( void )
{
u16* ptr;
u16 i = 0;
olDmGetBufferPtr( hBuf_DAC, (LPVOID FAR*)&ptr );
for( i = 0; i < outbuffersize / 4; i++ )
{
if ( i < 50 )
{
//on
*(ptr++) = ConvertVoltToDAC( volts_CH1 ); //CH_1
*(ptr++) = ConvertVoltToDAC( volts_CH2 ); //CH_2
*(ptr++) = ConvertVoltToDAC( 10.0 ); //blanking channel?
*(ptr++) = ConvertVoltToDAC( 4.5 ); //camera start exposure
}
else
{
//off
*(ptr++) = ConvertVoltToDAC( 0.0 ); //CH_1
*(ptr++) = ConvertVoltToDAC( 0.0 ); //CH_2
*(ptr++) = ConvertVoltToDAC( 10.0 ); //blanking channel?
*(ptr++) = ConvertVoltToDAC( 0.0 ); //camera off
}
}
}
