bsv_data_t* bsv_get_data(void)
{
short val;
int cnt, i;
if( !state ) {
b_st.pBuffer= (short*)samples_ping;
state = 1;
} else {
b_st.pBuffer= (short*)samples_pong;
state = 0;
}
b_st.size = chanactivcnt*sizeof(short);
b_st.validPoints= 0;
if( !GT_GetData(fd, &b_st, TRUE) ) {
GT_TranslateErrorCode(&errstr, 0);
return NULL;
}
if( !b_st.validPoints ) {
GT_TranslateErrorCode(&errstr, 0);
return NULL;
}
if( dchanmask ) {
/* expand samples from digital channels */
val = b_st.pBuffer[(cnt=(b_st.validPoints-1))];
for(i=0; i<DCHANNUM; i++) {
if( dchanmask&(1<<i) ) {
b_st.pBuffer[cnt] = ( (val&(1<<i)) ? (1<<15)-2 : 0 );
cnt++;
}
}
}
data.samples = (char*)b_st.pBuffer;
data.size = chanactivcnt*sizeof(short);
return &data;
}
UINT DataProcess(LPVOID lprarm)
{
CGtecDevice *pGtec = (CGtecDevice*)lprarm;
if(pGtec==NULL)
return 1;
OVERLAPPED ov;
ov.hEvent = m_hEvent;
ov.Offset = 0;
ov.OffsetHigh = 0;
DWORD dwBytereceive = 0;
DWORD dwlength = pGtec->m_bufsize;
BYTE *pBuffer = new BYTE[HEADER_SIZE + dwlength];
float *pfl = NULL;
float *pf = new float[dwlength/sizeof(float)]; //tmp buffer.
double* pd = new double[dwlength/sizeof(float)];
while(!pGtec->m_bExit)
{
GT_GetData(pGtec->m_hDevice,pBuffer , HEADER_SIZE+dwlength,&ov);
DWORD dwOVret = WaitForSingleObject(m_hEvent , 2000);
if(dwOVret==WAIT_TIMEOUT)
{
AfxMessageBox(_T("Timeout occured\n"), MB_ICONWARNING);
pGtec->m_bExit = true;
GT_ResetTransfer(pGtec->m_hDevice);
break;
}
GetOverlappedResult(pGtec->m_hDevice,&ov,&dwBytereceive,FALSE);
dwBytereceive -= HEADER_SIZE;
for (size_t i=0;i<dwBytereceive/sizeof(float);i++)
{
pfl = (float*)(pBuffer+HEADER_SIZE+sizeof(float)*i);
pf[i] = *pfl;
pd[i] = pf[i];
}
pGtec->SaveDatatoBuf(pd , dwBytereceive/sizeof(float));
}
delete pf;
delete pd;
return 0;
}
bool USBamp::acquire() {
BOOL ret;
ret = GT_GetData(this->devptr, &(this->datbuffer), &(this->ov));
WaitForSingleObject(this->ov.hEvent, 1000);
return ret;
}
